!function(e){if("object"==typeof exports)module.exports=e();else if("function"==typeof define&&define.amd)define(e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.PouchDBVersion200=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
"use strict";

var utils = _dereq_('./utils');
var merge = _dereq_('./merge');
var errors = _dereq_('./deps/errors');
var EventEmitter = _dereq_('events').EventEmitter;
/*
 * A generic pouch adapter
 */

// returns first element of arr satisfying callback predicate
function arrayFirst(arr, callback) {
  for (var i = 0; i < arr.length; i++) {
    if (callback(arr[i], i) === true) {
      return arr[i];
    }
  }
  return false;
}

// Wrapper for functions that call the bulkdocs api with a single doc,
// if the first result is an error, return an error
function yankError(callback) {
  return function (err, results) {
    if (err || results[0].error) {
      callback(err || results[0]);
    } else {
      callback(null, results[0]);
    }
  };
}

// for every node in a revision tree computes its distance from the closest
// leaf
function computeHeight(revs) {
  var height = {};
  var edges = [];
  merge.traverseRevTree(revs, function (isLeaf, pos, id, prnt) {
    var rev = pos + "-" + id;
    if (isLeaf) {
      height[rev] = 0;
    }
    if (prnt !== undefined) {
      edges.push({from: prnt, to: rev});
    }
    return rev;
  });

  edges.reverse();
  edges.forEach(function (edge) {
    if (height[edge.from] === undefined) {
      height[edge.from] = 1 + height[edge.to];
    } else {
      height[edge.from] = Math.min(height[edge.from], 1 + height[edge.to]);
    }
  });
  return height;
}
utils.inherits(AbstractPouchDBVersion200, EventEmitter);
module.exports = AbstractPouchDBVersion200;
function AbstractPouchDBVersion200() {
  var self = this;
  EventEmitter.call(this);
  self.autoCompact = function (callback) {
    if (!self.auto_compaction) {
      return callback;
    }
    return function (err, res) {
      if (err) {
        callback(err);
      } else {
        var count = res.length;
        var decCount = function () {
          count--;
          if (!count) {
            callback(null, res);
          }
        };
        res.forEach(function (doc) {
          if (doc.ok) {
            // TODO: we need better error handling
            self.compactDocument(doc.id, 1, decCount);
          } else {
            decCount();
          }
        });
      }
    };
  };
  var listeners = 0, changes;
  var eventNames = ['change', 'delete', 'create', 'update'];
  this.on('newListener', function (eventName) {
    if (~eventNames.indexOf(eventName)) {
      if (listeners) {
        listeners++;
        return;
      } else {
        listeners++;
      }
    } else {
      return;
    }
    var lastChange = 0;
    changes = this.changes({
      conflicts: true,
      include_docs: true,
      continuous: true,
      since: 'latest',
      onChange: function (change) {
        if (change.seq <= lastChange) {
          return;
        }
        lastChange = change.seq;
        self.emit('change', change);
        if (change.doc._deleted) {
          self.emit('delete', change);
        } else if (change.doc._rev.split('-')[0] === '1') {
          self.emit('create', change);
        } else {
          self.emit('update', change);
        }
      }
    });
  });
  this.on('removeListener', function (eventName) {
    if (~eventNames.indexOf(eventName)) {
      listeners--;
      if (listeners) {
        return;
      }
    } else {
      return;
    }
    changes.cancel();
  });
}
AbstractPouchDBVersion200.prototype.post = utils.toPromise(function (doc, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (typeof doc !== 'object' || Array.isArray(doc)) {
    return callback(errors.NOT_AN_OBJECT);
  }
  return this.bulkDocs({docs: [doc]}, opts,
      this.autoCompact(yankError(callback)));
});

AbstractPouchDBVersion200.prototype.put = utils.toPromise(function () {
  var args = Array.prototype.slice.call(arguments);
  var temp, temptype, doc, id, opts, callback;
  doc = args.shift();
  if (typeof doc !== 'object' || Array.isArray(doc)) {
    callback = args.pop();
    return callback(errors.NOT_AN_OBJECT);
  }
  doc = utils.extend(true, {}, doc);
  while (true) {
    temp = args.shift();
    temptype = typeof temp;
    if (temptype === "string" && !id) {
      doc._id = temp;
      id = true;
    } else if (temptype === "string" && id) {
      doc._rev = temp;
    } else if (temptype === "object") {
      opts = temp;
    } else if (temptype === "function") {
      callback = temp;
    }
    if (!args.length) {
      break;
    }
  }
  opts = opts || {};
  var error = utils.invalidIdError(doc._id);
  if (error) {
    return callback(error);
  }
  return this.bulkDocs({docs: [doc]}, opts,
      this.autoCompact(yankError(callback)));
});

AbstractPouchDBVersion200.prototype.putAttachment = utils.toPromise(function (docId, attachmentId, rev, blob, type, callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('putAttachment', arguments);
    return;
  }
  var api = this;
  if (typeof type === 'function') {
    callback = type;
    type = blob;
    blob = rev;
    rev = null;
  }
  if (typeof type === 'undefined') {
    type = blob;
    blob = rev;
    rev = null;
  }

  function createAttachment(doc) {
    doc._attachments = doc._attachments || {};
    doc._attachments[attachmentId] = {
      content_type: type,
      data: blob
    };
    api.put(doc, callback);
  }

  api.get(docId, function (err, doc) {
    // create new doc
    if (err && err.error === errors.MISSING_DOC.error) {
      createAttachment({_id: docId});
      return;
    }
    if (err) {
      callback(err);
      return;
    }

    if (doc._rev !== rev) {
      callback(errors.REV_CONFLICT);
      return;
    }

    createAttachment(doc);
  });
});

AbstractPouchDBVersion200.prototype.removeAttachment = utils.toPromise(function (docId, attachmentId, rev, callback) {
  var self = this;
  self.get(docId, function (err, obj) {
    if (err) {
      callback(err);
      return;
    }
    if (obj._rev !== rev) {
      callback(errors.REV_CONFLICT);
      return;
    }
    if (!obj._attachments) {
      return callback();
    }
    delete obj._attachments[attachmentId];
    if (Object.keys(obj._attachments).length === 0) {
      delete obj._attachments;
    }
    self.put(obj, callback);
  });
});

AbstractPouchDBVersion200.prototype.remove = utils.toPromise(function (doc, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (opts === undefined) {
    opts = {};
  }
  opts = utils.extend(true, {}, opts);
  opts.was_delete = true;
  var newDoc = {_id: doc._id, _rev: doc._rev};
  newDoc._deleted = true;
  return this.bulkDocs({docs: [newDoc]}, opts, yankError(callback));
});

AbstractPouchDBVersion200.prototype.revsDiff = utils.toPromise(function (req, opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  opts = utils.extend(true, {}, opts);
  var ids = Object.keys(req);
  var count = 0;
  var missing = {};

  function addToMissing(id, revId) {
    if (!missing[id]) {
      missing[id] = {missing: []};
    }
    missing[id].missing.push(revId);
  }

  function processDoc(id, rev_tree) {
    // Is this fast enough? Maybe we should switch to a set simulated by a map
    var missingForId = req[id].slice(0);
    merge.traverseRevTree(rev_tree, function (isLeaf, pos, revHash, ctx,
      opts) {
        var rev = pos + '-' + revHash;
        var idx = missingForId.indexOf(rev);
        if (idx === -1) {
          return;
        }

        missingForId.splice(idx, 1);
        if (opts.status !== 'available') {
          addToMissing(id, rev);
        }
      });

    // Traversing the tree is synchronous, so now `missingForId` contains
    // revisions that were not found in the tree
    missingForId.forEach(function (rev) {
      addToMissing(id, rev);
    });
  }

  ids.map(function (id) {
    this._getRevisionTree(id, function (err, rev_tree) {
      if (err && err.name === 'not_found' && err.message === 'missing') {
        missing[id] = {missing: req[id]};
      } else if (err) {
        return callback(err);
      } else {
        processDoc(id, rev_tree);
      }

      if (++count === ids.length) {
        return callback(null, missing);
      }
    });
  }, this);
});

// compact one document and fire callback
// by compacting we mean removing all revisions which
// are further from the leaf in revision tree than max_height
AbstractPouchDBVersion200.prototype.compactDocument = function (docId, max_height, callback) {
  var self = this;
  this._getRevisionTree(docId, function (err, rev_tree) {
    if (err) {
      return callback(err);
    }
    var height = computeHeight(rev_tree);
    var candidates = [];
    var revs = [];
    Object.keys(height).forEach(function (rev) {
      if (height[rev] > max_height) {
        candidates.push(rev);
      }
    });

    merge.traverseRevTree(rev_tree, function (isLeaf, pos, revHash, ctx, opts) {
      var rev = pos + '-' + revHash;
      if (opts.status === 'available' && candidates.indexOf(rev) !== -1) {
        opts.status = 'missing';
        revs.push(rev);
      }
    });
    self._doCompaction(docId, rev_tree, revs, callback);
  });
};

// compact the whole database using single document
// compaction
AbstractPouchDBVersion200.prototype.compact = utils.toPromise(function (opts, callback) {
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  var self = this;
  this.changes({complete: function (err, res) {
    if (err) {
      callback(); // TODO: silently fail
      return;
    }
    var count = res.results.length;
    if (!count) {
      callback();
      return;
    }
    res.results.forEach(function (row) {
      self.compactDocument(row.id, 0, function () {
        count--;
        if (!count) {
          callback();
        }
      });
    });
  }});
});

/* Begin api wrappers. Specific functionality to storage belongs in the _[method] */
AbstractPouchDBVersion200.prototype.get = utils.toPromise(function (id, opts, callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('get', arguments);
    return;
  }
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (typeof id !== 'string') {
    return callback(errors.INVALID_ID);
  }
  var leaves = [], self = this;
  function finishOpenRevs() {
    var result = [];
    var count = leaves.length;
    if (!count) {
      return callback(null, result);
    }
    // order with open_revs is unspecified
    leaves.forEach(function (leaf) {
      self.get(id, {rev: leaf, revs: opts.revs, attachments: opts.attachments}, function (err, doc) {
        if (!err) {
          result.push({ok: doc});
        } else {
          result.push({missing: leaf});
        }
        count--;
        if (!count) {
          callback(null, result);
        }
      });
    });
  }

  if (opts.open_revs) {
    if (opts.open_revs === "all") {
      this._getRevisionTree(id, function (err, rev_tree) {
        if (err) {
          // if there's no such document we should treat this
          // situation the same way as if revision tree was empty
          rev_tree = [];
        }
        leaves = merge.collectLeaves(rev_tree).map(function (leaf) {
          return leaf.rev;
        });
        finishOpenRevs();
      });
    } else {
      if (Array.isArray(opts.open_revs)) {
        leaves = opts.open_revs;
        for (var i = 0; i < leaves.length; i++) {
          var l = leaves[i];
          // looks like it's the only thing couchdb checks
          if (!(typeof(l) === "string" && /^\d+-/.test(l))) {
            return callback(errors.error(errors.BAD_REQUEST,
              "Invalid rev format"));
          }
        }
        finishOpenRevs();
      } else {
        return callback(errors.error(errors.UNKNOWN_ERROR,
          'function_clause'));
      }
    }
    return; // open_revs does not like other options
  }

  return this._get(id, opts, function (err, result) {
    opts = utils.extend(true, {}, opts);
    if (err) {
      return callback(err);
    }

    var doc = result.doc;
    var metadata = result.metadata;
    var ctx = result.ctx;

    if (opts.conflicts) {
      var conflicts = merge.collectConflicts(metadata);
      if (conflicts.length) {
        doc._conflicts = conflicts;
      }
    }

    if (opts.revs || opts.revs_info) {
      var paths = merge.rootToLeaf(metadata.rev_tree);
      var path = arrayFirst(paths, function (arr) {
        return arr.ids.map(function (x) { return x.id; })
          .indexOf(doc._rev.split('-')[1]) !== -1;
      });

      path.ids.splice(path.ids.map(function (x) {return x.id; })
                      .indexOf(doc._rev.split('-')[1]) + 1);
      path.ids.reverse();

      if (opts.revs) {
        doc._revisions = {
          start: (path.pos + path.ids.length) - 1,
          ids: path.ids.map(function (rev) {
            return rev.id;
          })
        };
      }
      if (opts.revs_info) {
        var pos =  path.pos + path.ids.length;
        doc._revs_info = path.ids.map(function (rev) {
          pos--;
          return {
            rev: pos + '-' + rev.id,
            status: rev.opts.status
          };
        });
      }
    }

    if (opts.local_seq) {
      doc._local_seq = result.metadata.seq;
    }

    if (opts.attachments && doc._attachments) {
      var attachments = doc._attachments;
      var count = Object.keys(attachments).length;
      if (count === 0) {
        return callback(null, doc);
      }
      Object.keys(attachments).forEach(function (key) {
        this._getAttachment(attachments[key], {encode: true, ctx: ctx}, function (err, data) {
          doc._attachments[key].data = data;
          if (!--count) {
            callback(null, doc);
          }
        });
      }, self);
    } else {
      if (doc._attachments) {
        for (var key in doc._attachments) {
          if (doc._attachments.hasOwnProperty(key)) {
            doc._attachments[key].stub = true;
          }
        }
      }
      callback(null, doc);
    }
  });
});

AbstractPouchDBVersion200.prototype.getAttachment = utils.toPromise(function (docId, attachmentId, opts, callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('getAttachment', arguments);
    return;
  }
  var self = this;
  if (opts instanceof Function) {
    callback = opts;
    opts = {};
  }
  opts = utils.extend(true, {}, opts);
  this._get(docId, opts, function (err, res) {
    if (err) {
      return callback(err);
    }
    if (res.doc._attachments && res.doc._attachments[attachmentId]) {
      opts.ctx = res.ctx;
      self._getAttachment(res.doc._attachments[attachmentId], opts, callback);
    } else {
      return callback(errors.MISSING_DOC);
    }
  });
});

AbstractPouchDBVersion200.prototype.allDocs = utils.toPromise(function (opts, callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('allDocs', arguments);
    return;
  }
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  opts = utils.extend(true, {}, opts);
  if ('keys' in opts) {
    var incompatibleOpt = ['startkey', 'endkey', 'key'].filter(function (incompatibleOpt) {
      return incompatibleOpt in opts;
    })[0];
    if (incompatibleOpt) {
      callback(errors.error(errors.QUERY_PARSE_ERROR,
        'Query parameter `' + incompatibleOpt + '` is not compatible with multi-get'
      ));
      return;
    }
  }
  if (typeof opts.skip === 'undefined') {
    opts.skip = 0;
  }

  return this._allDocs(opts, callback);
});

function processChange(doc, metadata, opts) {
  var changeList = [{rev: doc._rev}];
  if (opts.style === 'all_docs') {
    changeList = merge.collectLeaves(metadata.rev_tree)
    .map(function (x) { return {rev: x.rev}; });
  }
  var change = {
    id: metadata.id,
    changes: changeList,
    doc: doc
  };

  if (utils.isDeleted(metadata, doc._rev)) {
    change.deleted = true;
  }
  if (opts.conflicts) {
    change.doc._conflicts = merge.collectConflicts(metadata);
    if (!change.doc._conflicts.length) {
      delete change.doc._conflicts;
    }
  }
  return change;
}
AbstractPouchDBVersion200.prototype.changes = function (opts) {
  if (!this.taskqueue.isReady) {
    var task = this.taskqueue.addTask('changes', arguments);
    return {
      cancel: function () {
        if (task.task) {
          return task.task.cancel();
        }
        task.parameters[0].aborted = true;
      }
    };
  }
  var api = this;
  opts = utils.extend(true, {}, opts);
  opts.processChange = processChange;

  if (!opts.since) {
    opts.since = 0;
  }
  if (opts.since === 'latest') {
    var changes;
    api.info(function (err, info) {
      if (!opts.aborted) {
        opts.since = info.update_seq  - 1;
        changes = api.changes(opts);
      }
    });
    // Return a method to cancel this method from processing any more
    return {
      cancel: function () {
        if (changes) {
          return changes.cancel();
        }
        opts.aborted = true;
      }
    };
  }

  if (opts.filter && typeof opts.filter === 'string') {
    if (opts.filter === '_view') {
      if (opts.view && typeof opts.view === 'string') {
        // fetch a view from a design doc, make it behave like a filter
        var viewName = opts.view.split('/');
        api.get('_design/' + viewName[0], function (err, ddoc) {
          if (ddoc && ddoc.views && ddoc.views[viewName[1]]) {
            /*jshint evil: true */
            var filter = eval('(function () {' +
                              '  return function (doc) {' +
                              '    var emitted = false;' +
                              '    var emit = function (a, b) {' +
                              '      emitted = true;' +
                              '    };' +
                              '    var view = ' + ddoc.views[viewName[1]].map + ';' +
                              '    view(doc);' +
                              '    if (emitted) {' +
                              '      return true;' +
                              '    }' +
                              '  }' +
                              '})()');
            if (!opts.aborted) {
              opts.filter = filter;
              api.changes(opts);
            }
          } else {
            var msg = ddoc.views ? 'missing json key: ' + viewName[1] :
              'missing json key: views';
            err = err || errors.error(errors.MISSING_DOC, msg);
            opts.complete(err);
          }
        });
      } else {
        var err = errors.error(errors.BAD_REQUEST,
                              '`view` filter parameter is not provided.');
        opts.complete(err);
      }
    } else {
      // fetch a filter from a design doc
      var filterName = opts.filter.split('/');
      api.get('_design/' + filterName[0], function (err, ddoc) {
        if (ddoc && ddoc.filters && ddoc.filters[filterName[1]]) {
          /*jshint evil: true */
          var filter = eval('(function () { return ' +
                            ddoc.filters[filterName[1]] + ' })()');
          if (!opts.aborted) {
            opts.filter = filter;
            api.changes(opts);
          }
        } else {
          var msg = (ddoc && ddoc.filters) ? 'missing json key: ' + filterName[1]
            : 'missing json key: filters';
          err = err || errors.error(errors.MISSING_DOC, msg);
          opts.complete(err);
        }
      });
    }
    // Return a method to cancel this method from processing any more
    return {
      cancel: function () {
        opts.complete(null, {status: 'cancelled'});
        opts.complete = null;
        opts.aborted = true;
      }
    };
  }

  if (!('descending' in opts)) {
    opts.descending = false;
  }

  // 0 and 1 should return 1 document
  opts.limit = opts.limit === 0 ? 1 : opts.limit;
  return this._changes(opts);
};

AbstractPouchDBVersion200.prototype.close = utils.toPromise(function (callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('close', arguments);
    return;
  }
  return this._close(callback);
});

AbstractPouchDBVersion200.prototype.info = utils.toPromise(function (callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('info', arguments);
    return;
  }
  var self = this;
  this._info(function (err, info) {
    if (err) {
      return callback(err);
    }
    var len = self.prefix.length;
    if (info.db_name.length > len && info.db_name.slice(0, len) === self.prefix) {
      info.db_name = info.db_name.slice(len);
    }
    callback(null, info);
  });
});

AbstractPouchDBVersion200.prototype.id = utils.toPromise(function (callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('id', arguments);
    return;
  }
  return this._id(callback);
});

AbstractPouchDBVersion200.prototype.type = function () {
  return (typeof this._type === 'function') ? this._type() : this.adapter;
};

AbstractPouchDBVersion200.prototype.bulkDocs = utils.toPromise(function (req, opts, callback) {
  if (!this.taskqueue.isReady) {
    this.taskqueue.addTask('bulkDocs', arguments);
    return;
  }
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  if (!opts) {
    opts = {};
  } else {
    opts = utils.extend(true, {}, opts);
  }

  if (!req || !req.docs) {
    return callback(errors.MISSING_BULK_DOCS);
  }

  if (!Array.isArray(req.docs)) {
    return callback(errors.QUERY_PARSE_ERROR);
  }

  for (var i = 0; i < req.docs.length; ++i) {
    if (typeof req.docs[i] !== 'object' || Array.isArray(req.docs[i])) {
      return callback(errors.NOT_AN_OBJECT);
    }
  }

  req = utils.extend(true, {}, req);
  if (!('new_edits' in opts)) {
    if ('new_edits' in req) {
      opts.new_edits = req.new_edits;
    } else {
      opts.new_edits = true;
    }
  }

  return this._bulkDocs(req, opts, this.autoCompact(callback));
});

},{"./deps/errors":8,"./merge":14,"./utils":18,"events":21}],2:[function(_dereq_,module,exports){
"use strict";

var utils = _dereq_('../utils');
var errors = _dereq_('../deps/errors');
// parseUri 1.2.2
// (c) Steven Levithan <stevenlevithan.com>
// MIT License
function parseUri(str) {
  var o = parseUri.options;
  var m = o.parser[o.strictMode ? "strict" : "loose"].exec(str);
  var uri = {};
  var i = 14;

  while (i--) {
    uri[o.key[i]] = m[i] || "";
  }

  uri[o.q.name] = {};
  uri[o.key[12]].replace(o.q.parser, function ($0, $1, $2) {
    if ($1) {
      uri[o.q.name][$1] = $2;
    }
  });

  return uri;
}

function encodeDocId(id) {
  if (/^_(design|local)/.test(id)) {
    return id;
  }
  return encodeURIComponent(id);
}

parseUri.options = {
  strictMode: false,
  key: ["source", "protocol", "authority", "userInfo", "user", "password", "host",
        "port", "relative", "path", "directory", "file", "query", "anchor"],
  q:   {
    name:   "queryKey",
    parser: /(?:^|&)([^&=]*)=?([^&]*)/g
  },
  parser: {
    strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
    loose:  /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/
  }
};

// Get all the information you possibly can about the URI given by name and
// return it as a suitable object.
function getHost(name, opts) {
  // If the given name contains "http:"
  if (/http(s?):/.test(name)) {
    // Prase the URI into all its little bits
    var uri = parseUri(name);

    // Store the fact that it is a remote URI
    uri.remote = true;

    // Store the user and password as a separate auth object
    if (uri.user || uri.password) {
      uri.auth = {username: uri.user, password: uri.password};
    }

    // Split the path part of the URI into parts using '/' as the delimiter
    // after removing any leading '/' and any trailing '/'
    var parts = uri.path.replace(/(^\/|\/$)/g, '').split('/');

    // Store the first part as the database name and remove it from the parts
    // array
    uri.db = parts.pop();

    // Restore the path by joining all the remaining parts (all the parts
    // except for the database name) with '/'s
    uri.path = parts.join('/');
    opts = opts || {};
    opts = utils.extend(true, {}, opts);
    uri.headers = opts.headers || {};

    if (opts.auth || uri.auth) {
      var nAuth = opts.auth || uri.auth;
      var token = utils.btoa(nAuth.username + ':' + nAuth.password);
      uri.headers.Authorization = 'Basic ' + token;
    }

    if (opts.headers) {
      uri.headers = opts.headers;
    }

    return uri;
  }

  // If the given name does not contain 'http:' then return a very basic object
  // with no host, the current path, the given name as the database name and no
  // username/password
  return {host: '', path: '/', db: name, auth: false};
}

// Generate a URL with the host data given by opts and the given path
function genDBUrl(opts, path) {
  // If the host is remote
  if (opts.remote) {
    // If the host already has a path, then we need to have a path delimiter
    // Otherwise, the path delimiter is the empty string
    var pathDel = !opts.path ? '' : '/';

    // Return the URL made up of all the host's information and the given path
    return opts.protocol + '://' + opts.host + ':' + opts.port + '/' +
      opts.path + pathDel + opts.db + '/' + path;
  }

  // If the host is not remote, then return the URL made up of just the
  // database name and the given path
  return '/' + opts.db + '/' + path;
}

// Generate a URL with the host data given by opts and the given path
function genUrl(opts, path) {
  if (opts.remote) {
    // If the host already has a path, then we need to have a path delimiter
    // Otherwise, the path delimiter is the empty string
    var pathDel = !opts.path ? '' : '/';

    // If the host already has a path, then we need to have a path delimiter
    // Otherwise, the path delimiter is the empty string
    return opts.protocol + '://' + opts.host + ':' + opts.port + '/' + opts.path + pathDel + path;
  }

  return '/' + path;
}
// Implements the PouchDBVersion200 API for dealing with CouchDB instances over HTTP
function HttpPouch(opts, callback) {
  // Parse the URI given by opts.name into an easy-to-use object
  var host = getHost(opts.name, opts);

  // Generate the database URL based on the host
  var db_url = genDBUrl(host, '');

  // The functions that will be publically available for HttpPouch
  var api = this;
  var ajaxOpts = opts.ajax || {};
  opts = utils.extend(true, {}, opts);
  function ajax(options, callback) {
    return utils.ajax(utils.extend({}, ajaxOpts, options), callback);
  }
  var uuids = {
    list: [],
    get: function (opts, callback) {
      if (typeof opts === 'function') {
        callback = opts;
        opts = {count: 10};
      }
      var cb = function (err, body) {
        if (err || !('uuids' in body)) {
          callback(err || errors.UNKNOWN_ERROR);
        } else {
          uuids.list = uuids.list.concat(body.uuids);
          callback(null, "OK");
        }
      };
      var params = '?count=' + opts.count;
      ajax({
        headers: host.headers,
        method: 'GET',
        url: genUrl(host, '_uuids') + params
      }, cb);
    }
  };

  // Create a new CouchDB database based on the given opts
  var createDB = function () {
    ajax({headers: host.headers, method: 'PUT', url: db_url}, function (err, ret) {
      // If we get an "Unauthorized" error
      if (err && err.status === 401) {
        // Test if the database already exists
        ajax({headers: host.headers, method: 'HEAD', url: db_url}, function (err, ret) {
          // If there is still an error
          if (err) {
            // Give the error to the callback to deal with
            callback(err);
          } else {
            // Continue as if there had been no errors
            callback(null, api);
          }
        });
        // If there were no errros or if the only error is "Precondition Failed"
        // (note: "Precondition Failed" occurs when we try to create a database
        // that already exists)
      } else if (!err || err.status === 412) {
        // Continue as if there had been no errors
        callback(null, api);
      } else {
        callback(err);
      }
    });
  };
  if (!opts.skipSetup) {
    ajax({headers: host.headers, method: 'GET', url: db_url}, function (err, ret) {
      //check if the db exists
      if (err) {
        if (err.status === 404) {
          //if it doesn't, create it
          createDB();
        } else {
          callback(err);
        }
      } else {
        //go do stuff with the db
        callback(null, api);
      }
    });
  }

  api.type = function () {
    return 'http';
  };

  api.id = utils.toPromise(function (callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('id', arguments);
      return;
    }
    ajax({
      headers: host.headers,
      method: 'GET',
      url: genUrl(host, '')
    }, function (err, result) {
      callback(null, result.uuid + host.db);
    });
  });

  api.request = utils.toPromise(function (options, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('request', arguments);
      return;
    }
    options.headers = host.headers;
    options.url = genDBUrl(host, options.url);
    ajax(options, callback);
  });

  // Sends a POST request to the host calling the couchdb _compact function
  //    version: The version of CouchDB it is running
  api.compact = utils.toPromise(function (opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('compact', arguments);
      return;
    }
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    opts = utils.extend(true, {}, opts);
    ajax({
      headers: host.headers,
      url: genDBUrl(host, '_compact'),
      method: 'POST'
    }, function () {
      function ping() {
        api.info(function (err, res) {
          if (!res.compact_running) {
            callback();
          } else {
            setTimeout(ping, opts.interval || 200);
          }
        });
      }
      // Ping the http if it's finished compaction
      if (typeof callback === "function") {
        ping();
      }
    });
  });

  // Calls GET on the host, which gets back a JSON string containing
  //    couchdb: A welcome string
  //    version: The version of CouchDB it is running
  api._info = utils.toPromise(function (callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('info', arguments);
      return;
    }
    ajax({
      headers: host.headers,
      method: 'GET',
      url: genDBUrl(host, '')
    }, function (err, res) {
      if (err) {
        callback(err);
      } else {
        res.host = genDBUrl(host, '');
        callback(null, res);
      }
    });
  });

  // Get the document with the given id from the database given by host.
  // The id could be solely the _id in the database, or it may be a
  // _design/ID or _local/ID path
  api.get = utils.toPromise(function (id, opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('get', arguments);
      return;
    }
    // If no options were given, set the callback to the second parameter
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    opts = utils.extend(true, {}, opts);
    if (opts.auto_encode === undefined) {
      opts.auto_encode = true;
    }

    // List of parameters to add to the GET request
    var params = [];

    // If it exists, add the opts.revs value to the list of parameters.
    // If revs=true then the resulting JSON will include a field
    // _revisions containing an array of the revision IDs.
    if (opts.revs) {
      params.push('revs=true');
    }

    // If it exists, add the opts.revs_info value to the list of parameters.
    // If revs_info=true then the resulting JSON will include the field
    // _revs_info containing an array of objects in which each object
    // representing an available revision.
    if (opts.revs_info) {
      params.push('revs_info=true');
    }

    if (opts.local_seq) {
      params.push('local_seq=true');
    }
    // If it exists, add the opts.open_revs value to the list of parameters.
    // If open_revs=all then the resulting JSON will include all the leaf
    // revisions. If open_revs=["rev1", "rev2",...] then the resulting JSON
    // will contain an array of objects containing data of all revisions
    if (opts.open_revs) {
      if (opts.open_revs !== "all") {
        opts.open_revs = JSON.stringify(opts.open_revs);
      }
      params.push('open_revs=' + opts.open_revs);
    }

    // If it exists, add the opts.attachments value to the list of parameters.
    // If attachments=true the resulting JSON will include the base64-encoded
    // contents in the "data" property of each attachment.
    if (opts.attachments) {
      params.push('attachments=true');
    }

    // If it exists, add the opts.rev value to the list of parameters.
    // If rev is given a revision number then get the specified revision.
    if (opts.rev) {
      params.push('rev=' + opts.rev);
    }

    // If it exists, add the opts.conflicts value to the list of parameters.
    // If conflicts=true then the resulting JSON will include the field
    // _conflicts containing all the conflicting revisions.
    if (opts.conflicts) {
      params.push('conflicts=' + opts.conflicts);
    }

    // Format the list of parameters into a valid URI query string
    params = params.join('&');
    params = params === '' ? '' : '?' + params;

    if (opts.auto_encode) {
      id = encodeDocId(id);
    }

    // Set the options for the ajax call
    var options = {
      headers: host.headers,
      method: 'GET',
      url: genDBUrl(host, id + params)
    };

    // If the given id contains at least one '/' and the part before the '/'
    // is NOT "_design" and is NOT "_local"
    // OR
    // If the given id contains at least two '/' and the part before the first
    // '/' is "_design".
    // TODO This second condition seems strange since if parts[0] === '_design'
    // then we already know that parts[0] !== '_local'.
    var parts = id.split('/');
    if ((parts.length > 1 && parts[0] !== '_design' && parts[0] !== '_local') ||
        (parts.length > 2 && parts[0] === '_design' && parts[0] !== '_local')) {
      // Binary is expected back from the server
      options.binary = true;
    }

    // Get the document
    ajax(options, function (err, doc, xhr) {
      // If the document does not exist, send an error to the callback
      if (err) {
        return callback(err);
      }

      // Send the document to the callback
      callback(null, doc, xhr);
    });
  });

  // Delete the document given by doc from the database given by host.
  api.remove = utils.toPromise(function (doc, opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('remove', arguments);
      return;
    }
    // If no options were given, set the callback to be the second parameter
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }

    // Delete the document
    ajax({
      headers: host.headers,
      method: 'DELETE',
      url: genDBUrl(host, encodeDocId(doc._id)) + '?rev=' + doc._rev
    }, callback);
  });

  // Get the attachment
  api.getAttachment = utils.toPromise(function (docId, attachmentId, opts, callback) {
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    opts = utils.extend(true, {}, opts);
    if (opts.auto_encode === undefined) {
      opts.auto_encode = true;
    }
    if (opts.auto_encode) {
      docId = encodeDocId(docId);
    }
    opts.auto_encode = false;
    api.get(docId + '/' + attachmentId, opts, callback);
  });

  // Remove the attachment given by the id and rev
  api.removeAttachment = utils.toPromise(function (docId, attachmentId, rev, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('removeAttachment', arguments);
      return;
    }
    ajax({
      headers: host.headers,
      method: 'DELETE',
      url: genDBUrl(host, encodeDocId(docId) + '/' + attachmentId) + '?rev=' + rev
    }, callback);
  });

  // Add the attachment given by blob and its contentType property
  // to the document with the given id, the revision given by rev, and
  // add it to the database given by host.
  api.putAttachment = utils.toPromise(function (docId, attachmentId, rev, blob, type, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('putAttachment', arguments);
      return;
    }
    if (typeof type === 'function') {
      callback = type;
      type = blob;
      blob = rev;
      rev = null;
    }
    if (typeof type === 'undefined') {
      type = blob;
      blob = rev;
      rev = null;
    }
    var id = encodeDocId(docId) + '/' + attachmentId;
    var url = genDBUrl(host, id);
    if (rev) {
      url += '?rev=' + rev;
    }

    var opts = {
      headers: host.headers,
      method: 'PUT',
      url: url,
      processData: false,
      body: blob,
      timeout: 60000
    };
    opts.headers['Content-Type'] = type;
    // Add the attachment
    ajax(opts, callback);
  });

  // Add the document given by doc (in JSON string format) to the database
  // given by host. This fails if the doc has no _id field.
  api.put = utils.toPromise(function () {
    var args = Array.prototype.slice.call(arguments);
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('put', args);
      return;
    }
    var temp, temptype, doc, id, opts, callback;
    doc = args.shift();
    if (typeof doc !== 'object' || Array.isArray(doc)) {
      callback = args.pop();
      return callback(errors.NOT_AN_OBJECT);
    }
    doc = utils.extend(true, {}, doc);
    while (true) {
      temp = args.shift();
      temptype = typeof temp;
      if (temptype === "string" && !id) {
        doc._id = temp;
        id = true;
      } else if (temptype === "string" && id) {
        doc._rev = temp;
      } else if (temptype === "object") {
        opts = utils.extend(true, {}, temp);
      } else if (temptype === "function") {
        callback = temp;
      }
      if (!args.length) {
        break;
      }
    }
    opts = opts || {};
    var error = utils.invalidIdError(doc._id);
    if (error) {
      return callback(error);
    }

    // List of parameter to add to the PUT request
    var params = [];

    // If it exists, add the opts.new_edits value to the list of parameters.
    // If new_edits = false then the database will NOT assign this document a
    // new revision number
    if (opts && typeof opts.new_edits !== 'undefined') {
      params.push('new_edits=' + opts.new_edits);
    }

    // Format the list of parameters into a valid URI query string
    params = params.join('&');
    if (params !== '') {
      params = '?' + params;
    }

    // Add the document
    ajax({
      headers: host.headers,
      method: 'PUT',
      url: genDBUrl(host, encodeDocId(doc._id)) + params,
      body: doc
    }, callback);
  });

  // Add the document given by doc (in JSON string format) to the database
  // given by host. This does not assume that doc is a new document (i.e. does not
  // have a _id or a _rev field.
  api.post = utils.toPromise(function (doc, opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('post', arguments);
      return;
    }
    // If no options were given, set the callback to be the second parameter
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    opts = utils.extend(true, {}, opts);
    if (typeof doc !== 'object') {
      return callback(errors.NOT_AN_OBJECT);
    }
    if (! ("_id" in doc)) {
      if (uuids.list.length > 0) {
        doc._id = uuids.list.pop();
        api.put(doc, opts, callback);
      } else {
        uuids.get(function (err, resp) {
          if (err) {
            return callback(errors.UNKNOWN_ERROR);
          }
          doc._id = uuids.list.pop();
          api.put(doc, opts, callback);
        });
      }
    } else {
      api.put(doc, opts, callback);
    }
  });

  // Update/create multiple documents given by req in the database
  // given by host.
  api.bulkDocs = utils.toPromise(function (req, opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('bulkDocs', arguments);
      return;
    }
    // If no options were given, set the callback to be the second parameter
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    if (!opts) {
      opts = {};
    }
    if (!Array.isArray(req.docs)) {
      return callback(errors.error(errors.NOT_AN_OBJECT, "Missing JSON list of 'docs'"));
    }
    var bad = req.docs.filter(function (doc) {
      return typeof doc !== 'object' || Array.isArray(doc);
    });
    if (bad.length) {
      return callback(errors.NOT_AN_OBJECT);
    }
    req = utils.extend(true, {}, req);
    opts = utils.extend(true, {}, opts);
    // If opts.new_edits exists add it to the document data to be
    // send to the database.
    // If new_edits=false then it prevents the database from creating
    // new revision numbers for the documents. Instead it just uses
    // the old ones. This is used in database replication.
    if (typeof opts.new_edits !== 'undefined') {
      req.new_edits = opts.new_edits;
    }

    // Update/create the documents
    ajax({
      headers: host.headers,
      method: 'POST',
      url: genDBUrl(host, '_bulk_docs'),
      body: req
    }, callback);
  });

  // Get a listing of the documents in the database given
  // by host and ordered by increasing id.
  api.allDocs = utils.toPromise(function (opts, callback) {
    // If no options were given, set the callback to be the second parameter
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('allDocs', arguments);
      return;
    }
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }
    opts = utils.extend(true, {}, opts);
    // List of parameters to add to the GET request
    var params = [];
    var body;
    var method = 'GET';

    // TODO I don't see conflicts as a valid parameter for a
    // _all_docs request (see http://wiki.apache.org/couchdb/HTTP_Document_API#all_docs)
    if (opts.conflicts) {
      params.push('conflicts=true');
    }

    // If opts.descending is truthy add it to params
    if (opts.descending) {
      params.push('descending=true');
    }

    // If opts.include_docs exists, add the include_docs value to the
    // list of parameters.
    // If include_docs=true then include the associated document with each
    // result.
    if (opts.include_docs) {
      params.push('include_docs=true');
    }

    if (opts.key) {
      params.push('key=' + encodeURIComponent(JSON.stringify(opts.key)));
    }

    // If opts.startkey exists, add the startkey value to the list of
    // parameters.
    // If startkey is given then the returned list of documents will
    // start with the document whose id is startkey.
    if (opts.startkey) {
      params.push('startkey=' +
        encodeURIComponent(JSON.stringify(opts.startkey)));
    }

    // If opts.endkey exists, add the endkey value to the list of parameters.
    // If endkey is given then the returned list of docuemnts will
    // end with the document whose id is endkey.
    if (opts.endkey) {
      params.push('endkey=' + encodeURIComponent(JSON.stringify(opts.endkey)));
    }

    // If opts.limit exists, add the limit value to the parameter list.
    if (opts.limit) {
      params.push('limit=' + opts.limit);
    }

    if (typeof opts.skip !== 'undefined') {
      params.push('skip=' + opts.skip);
    }

    // Format the list of parameters into a valid URI query string
    params = params.join('&');
    if (params !== '') {
      params = '?' + params;
    }

    if (typeof opts.keys !== 'undefined') {

      var MAX_URL_LENGTH = 2000;
      // according to http://stackoverflow.com/a/417184/680742,
      // the de factor URL length limit is 2000 characters

      var keysAsString = 'keys=' + encodeURIComponent(JSON.stringify(opts.keys));
      if (keysAsString.length + params.length + 1 <= MAX_URL_LENGTH) {
        // If the keys are short enough, do a GET. we do this to work around
        // Safari not understanding 304s on POSTs (see issue #1239)
        params += (params.indexOf('?') !== -1 ? '&' : '?') + keysAsString;
      } else {
        // If keys are too long, issue a POST request to circumvent GET query string limits
        // see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options
        method = 'POST';
        body = JSON.stringify({keys: opts.keys});
      }
    }

    // Get the document listing
    ajax({
      headers: host.headers,
      method: method,
      url: genDBUrl(host, '_all_docs' + params),
      body: body
    }, callback);
  });

  // Get a list of changes made to documents in the database given by host.
  // TODO According to the README, there should be two other methods here,
  // api.changes.addListener and api.changes.removeListener.
  api.changes = function (opts) {
    // We internally page the results of a changes request, this means
    // if there is a large set of changes to be returned we can start
    // processing them quicker instead of waiting on the entire
    // set of changes to return and attempting to process them at once
    var CHANGES_LIMIT = 25;

    if (!api.taskqueue.isReady) {
      var task = api.taskqueue.addTask('changes', arguments);
      return {
        cancel: function () {
          if (task.task) {
            return task.task.cancel();
          } else {
            utils.call(opts.complete, null, {status: 'cancelled'});
            opts.complete = null;
          }
          task.parameters[0].aborted = true;
        }
      };
    }

    opts = utils.extend(true, {}, opts);
    opts.timeout = opts.timeout || 0;
    if (opts.since === 'latest') {
      var changes = api.changes({
        descending: true,
        limit: 1,
        timeout: opts.timeout,
        complete: function (err, info) {
          if (err) {
            opts.aborted = true;
            utils.call(opts.complete, err);
            return;
          }
          if (!opts.aborted) {
            opts.since = info.last_seq;
            changes = api.changes(opts);
          }
        }
      });
      // Return a method to cancel this method from processing any more
      return {
        cancel: function () {
          utils.call(opts.complete, null, {status: 'cancelled'});
          opts.complete = null;
          if (changes) {
            return changes.cancel();
          }
          opts.aborted = true;
        }
      };
    }

    var params = {};
    var limit = (typeof opts.limit !== 'undefined') ? opts.limit : false;
    if (limit === 0) {
      limit = 1;
    }
    //
    var leftToFetch = limit;

    if (opts.style) {
      params.style = opts.style;
    }

    if (opts.include_docs || opts.filter && typeof opts.filter === 'function') {
      params.include_docs = true;
    }

    if (opts.continuous) {
      params.feed = 'longpoll';
    }

    if (opts.conflicts) {
      params.conflicts = true;
    }

    if (opts.descending) {
      params.descending = true;
    }

    if (opts.filter && typeof opts.filter === 'string') {
      params.filter = opts.filter;
      if (opts.filter === '_view' && opts.view && typeof opts.view === 'string') {
        params.view = opts.view;
      }
    }

    // If opts.query_params exists, pass it through to the changes request.
    // These parameters may be used by the filter on the source database.
    if (opts.query_params && typeof opts.query_params === 'object') {
      for (var param_name in opts.query_params) {
        if (opts.query_params.hasOwnProperty(param_name)) {
          params[param_name] = opts.query_params[param_name];
        }
      }
    }

    var xhr;
    var lastFetchedSeq;

    // Get all the changes starting wtih the one immediately after the
    // sequence number given by since.
    var fetch = function (since, callback) {
      params.since = since;
      if (opts.descending) {
        if (limit) {
          params.limit = leftToFetch;
        }
      } else {
        params.limit = (!limit || leftToFetch > CHANGES_LIMIT) ?
          CHANGES_LIMIT : leftToFetch;
      }

      var paramStr = '?' + Object.keys(params).map(function (k) {
        return k + '=' + params[k];
      }).join('&');

      // Set the options for the ajax call
      var xhrOpts = {
        headers: host.headers,
        method: 'GET',
        url: genDBUrl(host, '_changes' + paramStr),
        // _changes can take a long time to generate, especially when filtered
        timeout: opts.timeout
      };
      lastFetchedSeq = since;

      if (opts.aborted) {
        return;
      }

      // Get the changes
      xhr = ajax(xhrOpts, callback);
    };

    // If opts.since exists, get all the changes from the sequence
    // number given by opts.since. Otherwise, get all the changes
    // from the sequence number 0.
    var fetchTimeout = 10;
    var fetchRetryCount = 0;

    var results = {results: []};

    var fetched = function (err, res) {
      var raw_results_length = 0;
      // If the result of the ajax call (res) contains changes (res.results)
      if (res && res.results) {
        raw_results_length = res.results.length;
        results.last_seq = res.last_seq;
        // For each change
        var req = {};
        req.query = opts.query_params;
        res.results = res.results.filter(function (c) {
          leftToFetch--;
          var ret = utils.filterChange(opts)(c);
          if (ret) {
            results.results.push(c);
            utils.call(opts.onChange, c);
          }
          return ret;
        });
      } else if (err) {
        // In case of an error, stop listening for changes and call opts.complete
        opts.aborted = true;
        utils.call(opts.complete, err);
        return;
      }

      // The changes feed may have timed out with no results
      // if so reuse last update sequence
      if (res && res.last_seq) {
        lastFetchedSeq = res.last_seq;
      }

      var finished = (limit && leftToFetch <= 0) ||
        (res && raw_results_length < CHANGES_LIMIT) ||
        (opts.descending);

      if (opts.continuous || !finished) {
        // Increase retry delay exponentially as long as errors persist
        if (err) {
          fetchRetryCount += 1;
        } else {
          fetchRetryCount = 0;
        }
        var timeoutMultiplier = 1 << fetchRetryCount;
        var retryWait = fetchTimeout * timeoutMultiplier;
        var maximumWait = opts.maximumWait || 30000;

        if (retryWait > maximumWait) {
          utils.call(opts.complete, err || errors.UNKNOWN_ERROR);
          return;
        }

        // Queue a call to fetch again with the newest sequence number
        setTimeout(function () { fetch(lastFetchedSeq, fetched); }, retryWait);
      } else {
        // We're done, call the callback
        utils.call(opts.complete, null, results);
      }
    };

    fetch(opts.since || 0, fetched);

    // Return a method to cancel this method from processing any more
    return {
      cancel: function () {
        utils.call(opts.complete, null, {status: 'cancelled'});
        opts.complete = null;
        opts.aborted = true;
        xhr.abort();
      }
    };
  };

  // Given a set of document/revision IDs (given by req), tets the subset of
  // those that do NOT correspond to revisions stored in the database.
  // See http://wiki.apache.org/couchdb/HttpPostRevsDiff
  api.revsDiff = utils.toPromise(function (req, opts, callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('revsDiff', arguments);
      return;
    }
    // If no options were given, set the callback to be the second parameter
    if (typeof opts === 'function') {
      callback = opts;
      opts = {};
    }

    // Get the missing document/revision IDs
    ajax({
      headers: host.headers,
      method: 'POST',
      url: genDBUrl(host, '_revs_diff'),
      body: req
    }, function (err, res) {
      callback(err, res);
    });
  });

  api.close = utils.toPromise(function (callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('close', arguments);
      return;
    }
    callback();
  });

  function replicateOnServer(target, opts, promise, targetHostUrl) {
    opts = utils.extend(true, {}, opts);
    var targetHost = getHost(targetHostUrl);
    var params = {
      source: host.db,
      target: targetHost.protocol === host.protocol &&
        targetHost.authority === host.authority ? targetHost.db : targetHost.source
    };

    if (opts.continuous) {
      params.continuous = true;
    }

    if (opts.create_target) {
      params.create_target = true;
    }

    if (opts.doc_ids) {
      params.doc_ids = opts.doc_ids;
    }

    if (opts.filter && typeof opts.filter === 'string') {
      params.filter = opts.filter;
    }

    if (opts.query_params) {
      params.query_params = opts.query_params;
    }

    var result = {};
    var repOpts = {
      headers: host.headers,
      method: 'POST',
      url: host.protocol + '://' + host.host +
        (host.port === 80 ? '' : (':' + host.port)) + '/_replicate',
      body: params
    };

    var xhr;
    promise.cancel = function () {
      this.cancelled = true;
      if (xhr && !result.ok) {
        xhr.abort();
      }
      if (result._local_id) {
        repOpts.body = {
          replication_id: result._local_id
        };
      }
      repOpts.body.cancel = true;
      ajax(repOpts, function (err, resp, xhr) {
        // If the replication cancel request fails, send an error to the callback
        if (err) {
          return callback(err);
        }
        // Send the replication cancel result to the complete callback
        utils.call(opts.complete, null, result, xhr);
      });
    };

    if (promise.cancelled) {
      return;
    }

    xhr = ajax(repOpts, function (err, resp, xhr) {
      // If the replication fails, send an error to the callback
      if (err) {
        return callback(err);
      }

      result.ok = true;

      // Provided by CouchDB from 1.2.0 onward to cancel replication
      if (resp._local_id) {
        result._local_id = resp._local_id;
      }

      // Send the replication result to the complete callback
      utils.call(opts.complete, null, resp, xhr);
    });
  }

  api.replicateOnServer = function (target, opts, promise) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('replicateOnServer', arguments);
      return promise;
    }
    target.info(function (err, info) {
      replicateOnServer(target, opts, promise, info.host);
    });
  };
  api.destroy = utils.toPromise(function (callback) {
    if (!api.taskqueue.isReady) {
      api.taskqueue.addTask('destroy', arguments);
      return;
    }
    utils.ajax({
      url: genDBUrl(host, ''),
      method: 'DELETE'
    }, function (err, resp) {
      if (err) {
        api.emit('error', err);
        callback(err);
      } else {
        api.emit('destroyed');
        callback(null, resp);
      }
    });
  });
}

// Delete the HttpPouch specified by the given name.
HttpPouch.destroy = utils.toPromise(function (name, opts, callback) {
  var host = getHost(name, opts);
  opts = opts || {};
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  opts = utils.extend(true, {}, opts);
  opts.headers = host.headers;
  opts.method = 'DELETE';
  opts.url = genDBUrl(host, '');
  utils.ajax(opts, callback);
});

// HttpPouch is a valid adapter.
HttpPouch.valid = function () {
  return true;
};

module.exports = HttpPouch;

},{"../deps/errors":8,"../utils":18}],3:[function(_dereq_,module,exports){
(function (global){
'use strict';

var utils = _dereq_('../utils');
var merge = _dereq_('../merge');
var errors = _dereq_('../deps/errors');

function idbError(callback) {
  return function (event) {
    callback(errors.error(errors.IDB_ERROR, event.target, event.type));
  };
}

function isModernIdb() {
  // check for outdated implementations of IDB
  // that rely on the setVersion method instead of onupgradeneeded (issue #1207)

  // cache based on appVersion, in case the browser is updated
  var cacheKey = "_pouch__checkModernIdb_" +
    (global.navigator && global.navigator.appVersion);
  var cached = global.localStorage && global.localStorage[cacheKey];
  if (cached) {
    return JSON.parse(cached);
  }

  var dbName = '_pouch__checkModernIdb';
  var result = global.indexedDB.open(dbName, 1).onupgradeneeded === null;

  if (global.indexedDB.deleteDatabase) {
    global.indexedDB.deleteDatabase(dbName); // db no longer needed
  }
  if (global.localStorage) {
    global.localStorage[cacheKey] = JSON.stringify(result); // cache
  }
  return result;
}
function IdbPouch(opts, callback) {

  // IndexedDB requires a versioned database structure, so we use the
  // version here to manage migrations.
  var ADAPTER_VERSION = 2;

  // The object stores created for each database
  // DOC_STORE stores the document meta data, its revision history and state
  var DOC_STORE = 'document-store';
  // BY_SEQ_STORE stores a particular version of a document, keyed by its
  // sequence id
  var BY_SEQ_STORE = 'by-sequence';
  // Where we store attachments
  var ATTACH_STORE = 'attach-store';
  // Where we store meta data
  var META_STORE = 'meta-store';
  // Where we detect blob support
  var DETECT_BLOB_SUPPORT_STORE = 'detect-blob-support';

  var name = opts.name;
  var req = global.indexedDB.open(name, ADAPTER_VERSION);

  if (!('openReqList' in IdbPouch)) {
    IdbPouch.openReqList = {};
  }
  IdbPouch.openReqList[name] = req;

  var blobSupport = null;
  var instanceId = null;
  var api = this;
  var idb = null;

  req.onupgradeneeded = function (e) {
    var db = e.target.result;
    if (e.oldVersion < 1) {
      // initial schema
      createSchema(db);
    }
    if (e.oldVersion < 2) {
      // version 2 adds the deletedOrLocal index
      addDeletedOrLocalIndex(e);
    }
  };

  function createSchema(db) {
    db.createObjectStore(DOC_STORE, {keyPath : 'id'})
      .createIndex('seq', 'seq', {unique: true});
    db.createObjectStore(BY_SEQ_STORE, {autoIncrement : true})
      .createIndex('_doc_id_rev', '_doc_id_rev', {unique: true});
    db.createObjectStore(ATTACH_STORE, {keyPath: 'digest'});
    db.createObjectStore(META_STORE, {keyPath: 'id', autoIncrement: false});
    db.createObjectStore(DETECT_BLOB_SUPPORT_STORE);
  }

  function addDeletedOrLocalIndex(e) {
    var docStore = e.currentTarget.transaction.objectStore(DOC_STORE);

    docStore.openCursor().onsuccess = function (event) {
      var cursor = event.target.result;
      if (cursor) {
        var metadata = cursor.value;
        var deleted = utils.isDeleted(metadata);
        var local = utils.isLocalId(metadata.id);
        metadata.deletedOrLocal = (deleted || local) ? "1" : "0";
        docStore.put(metadata);
        cursor['continue']();
      } else {
        docStore.createIndex('deletedOrLocal', 'deletedOrLocal', {unique : false});
      }
    };
  }

  req.onsuccess = function (e) {

    idb = e.target.result;

    idb.onversionchange = function () {
      idb.close();
    };

    var txn = idb.transaction([META_STORE, DETECT_BLOB_SUPPORT_STORE],
                              'readwrite');

    var req = txn.objectStore(META_STORE).get(META_STORE);

    req.onsuccess = function (e) {

      var idStored = false;
      var checkSetupComplete = function () {
        if (blobSupport === null || !idStored) {
          return;
        } else {
          callback(null, api);
        }
      };

      var meta = e.target.result || {id: META_STORE};
      if (name  + '_id' in meta) {
        instanceId = meta[name + '_id'];
        idStored = true;
        checkSetupComplete();
      } else {
        instanceId = utils.uuid();
        meta[name + '_id'] = instanceId;
        txn.objectStore(META_STORE).put(meta).onsuccess = function () {
          idStored = true;
          checkSetupComplete();
        };
      }

      // detect blob support
      try {
        txn.objectStore(DETECT_BLOB_SUPPORT_STORE).put(utils.createBlob(), "key");
        blobSupport = true;
      } catch (err) {
        blobSupport = false;
      } finally {
        checkSetupComplete();
      }
    };
  };

  req.onerror = idbError(callback);

  api.type = function () {
    return 'idb';
  };

  api._id = utils.toPromise(function (callback) {
    callback(null, instanceId);
  });

  api._bulkDocs = function idb_bulkDocs(req, opts, callback) {
    var newEdits = opts.new_edits;
    var userDocs = req.docs;
    // Parse the docs, give them a sequence number for the result
    var docInfos = userDocs.map(function (doc, i) {
      var newDoc = utils.parseDoc(doc, newEdits);
      newDoc._bulk_seq = i;
      return newDoc;
    });

    var docInfoErrors = docInfos.filter(function (docInfo) {
      return docInfo.error;
    });
    if (docInfoErrors.length) {
      return callback(docInfoErrors[0]);
    }

    var results = [];
    var docsWritten = 0;

    function writeMetaData(e) {
      var meta = e.target.result;
      meta.updateSeq = (meta.updateSeq || 0) + docsWritten;
      txn.objectStore(META_STORE).put(meta);
    }

    function processDocs() {
      if (!docInfos.length) {
        txn.objectStore(META_STORE).get(META_STORE).onsuccess = writeMetaData;
        return;
      }
      var currentDoc = docInfos.shift();
      var req = txn.objectStore(DOC_STORE).get(currentDoc.metadata.id);
      req.onsuccess = function process_docRead(event) {
        var oldDoc = event.target.result;
        if (!oldDoc) {
          insertDoc(currentDoc);
        } else {
          updateDoc(oldDoc, currentDoc);
        }
      };
    }

    function complete(event) {
      var aresults = [];
      results.sort(sortByBulkSeq);
      results.forEach(function (result) {
        delete result._bulk_seq;
        if (result.error) {
          aresults.push(result);
          return;
        }
        var metadata = result.metadata;
        var rev = merge.winningRev(metadata);

        aresults.push({
          ok: true,
          id: metadata.id,
          rev: rev
        });

        if (utils.isLocalId(metadata.id)) {
          return;
        }

        IdbPouch.Changes.notify(name);
        IdbPouch.Changes.notifyLocalWindows(name);
      });
      callback(null, aresults);
    }

    function preprocessAttachment(att, finish) {
      if (att.stub) {
        return finish();
      }
      if (typeof att.data === 'string') {
        var data;
        try {
          data = atob(att.data);
        } catch (e) {
          var err = errors.error(errors.BAD_ARG,
                                "Attachments need to be base64 encoded");
          return callback(err);
        }
        att.digest = 'md5-' + utils.Crypto.MD5(data);
        if (blobSupport) {
          var type = att.content_type;
          data = utils.fixBinary(data);
          att.data = utils.createBlob([data], {type: type});
        }
        return finish();
      }
      var reader = new FileReader();
      reader.onloadend = function (e) {
        att.digest = 'md5-' + utils.Crypto.MD5(this.result);
        if (!blobSupport) {
          att.data = btoa(this.result);
        }
        finish();
      };
      reader.readAsBinaryString(att.data);
    }

    function preprocessAttachments(callback) {
      if (!docInfos.length) {
        return callback();
      }

      var docv = 0;
      docInfos.forEach(function (docInfo) {
        var attachments = docInfo.data && docInfo.data._attachments ?
          Object.keys(docInfo.data._attachments) : [];

        if (!attachments.length) {
          return done();
        }

        var recv = 0;
        function attachmentProcessed() {
          recv++;
          if (recv === attachments.length) {
            done();
          }
        }

        for (var key in docInfo.data._attachments) {
          if (docInfo.data._attachments.hasOwnProperty(key)) {
            preprocessAttachment(docInfo.data._attachments[key], attachmentProcessed);
          }
        }
      });

      function done() {
        docv++;
        if (docInfos.length === docv) {
          callback();
        }
      }
    }

    function writeDoc(docInfo, callback) {
      var err = null;
      var recv = 0;
      docInfo.data._id = docInfo.metadata.id;
      docInfo.data._rev = docInfo.metadata.rev;

      docsWritten++;

      if (utils.isDeleted(docInfo.metadata, docInfo.metadata.rev)) {
        docInfo.data._deleted = true;
      }

      var attachments = docInfo.data._attachments ?
        Object.keys(docInfo.data._attachments) : [];

      function collectResults(attachmentErr) {
        if (!err) {
          if (attachmentErr) {
            err = attachmentErr;
            callback(err);
          } else if (recv === attachments.length) {
            finish();
          }
        }
      }

      function attachmentSaved(err) {
        recv++;
        collectResults(err);
      }

      for (var key in docInfo.data._attachments) {
        if (!docInfo.data._attachments[key].stub) {
          var data = docInfo.data._attachments[key].data;
          delete docInfo.data._attachments[key].data;
          var digest = docInfo.data._attachments[key].digest;
          saveAttachment(docInfo, digest, data, attachmentSaved);
        } else {
          recv++;
          collectResults();
        }
      }

      function finish() {
        docInfo.data._doc_id_rev = docInfo.data._id + "::" + docInfo.data._rev;
        var dataReq = txn.objectStore(BY_SEQ_STORE).put(docInfo.data);
        dataReq.onsuccess = function (e) {
          docInfo.metadata.seq = e.target.result;
          // Current _rev is calculated from _rev_tree on read
          delete docInfo.metadata.rev;
          var deleted = utils.isDeleted(docInfo.metadata);
          var local = utils.isLocalId(docInfo.metadata.id);
          var metadata = utils.extend(true, {deletedOrLocal : (deleted || local) ? "1" : "0"}, docInfo.metadata);
          var metaDataReq = txn.objectStore(DOC_STORE).put(metadata);
          metaDataReq.onsuccess = function () {
            results.push(docInfo);
            utils.call(callback);
          };
        };
      }

      if (!attachments.length) {
        finish();
      }
    }

    function updateDoc(oldDoc, docInfo) {
      var merged = merge.merge(oldDoc.rev_tree, docInfo.metadata.rev_tree[0], 1000);
      var wasPreviouslyDeleted = utils.isDeleted(oldDoc);
      var inConflict = (wasPreviouslyDeleted &&
                        utils.isDeleted(docInfo.metadata)) ||
        (!wasPreviouslyDeleted && newEdits && merged.conflicts !== 'new_leaf');

      if (inConflict) {
        results.push(makeErr(errors.REV_CONFLICT, docInfo._bulk_seq));
        return processDocs();
      }

      docInfo.metadata.rev_tree = merged.tree;
      writeDoc(docInfo, processDocs);
    }

    function insertDoc(docInfo) {
      // Cant insert new deleted documents
      if ('was_delete' in opts && utils.isDeleted(docInfo.metadata)) {
        results.push(errors.MISSING_DOC);
        return processDocs();
      }
      writeDoc(docInfo, processDocs);
    }

    // Insert sequence number into the error so we can sort later
    function makeErr(err, seq) {
      err._bulk_seq = seq;
      return err;
    }

    function saveAttachment(docInfo, digest, data, callback) {
      var objectStore = txn.objectStore(ATTACH_STORE);
      objectStore.get(digest).onsuccess = function (e) {
        var originalRefs = e.target.result && e.target.result.refs || {};
        var ref = [docInfo.metadata.id, docInfo.metadata.rev].join('@');
        var newAtt = {
          digest: digest,
          body: data,
          refs: originalRefs
        };
        newAtt.refs[ref] = true;
        objectStore.put(newAtt).onsuccess = function (e) {
          utils.call(callback);
        };
      };
    }

    var txn;
    preprocessAttachments(function () {
      txn = idb.transaction([DOC_STORE, BY_SEQ_STORE, ATTACH_STORE, META_STORE],
                            'readwrite');
      txn.onerror = idbError(callback);
      txn.ontimeout = idbError(callback);
      txn.oncomplete = complete;

      processDocs();
    });
  };

  function sortByBulkSeq(a, b) {
    return a._bulk_seq - b._bulk_seq;
  }

  // First we look up the metadata in the ids database, then we fetch the
  // current revision(s) from the by sequence store
  api._get = function idb_get(id, opts, callback) {
    var doc;
    var metadata;
    var err;
    var txn;
    opts = utils.extend(true, {}, opts);
    if (opts.ctx) {
      txn = opts.ctx;
    } else {
      txn = idb.transaction([DOC_STORE, BY_SEQ_STORE, ATTACH_STORE], 'readonly');
    }

    function finish() {
      callback(err, {doc: doc, metadata: metadata, ctx: txn});
    }

    txn.objectStore(DOC_STORE).get(id).onsuccess = function (e) {
      metadata = e.target.result;
      // we can determine the result here if:
      // 1. there is no such document
      // 2. the document is deleted and we don't ask about specific rev
      // When we ask with opts.rev we expect the answer to be either
      // doc (possibly with _deleted=true) or missing error
      if (!metadata) {
        err = errors.MISSING_DOC;
        return finish();
      }
      if (utils.isDeleted(metadata) && !opts.rev) {
        err = errors.error(errors.MISSING_DOC, "deleted");
        return finish();
      }

      var rev = merge.winningRev(metadata);
      var key = metadata.id + '::' + (opts.rev ? opts.rev : rev);
      var index = txn.objectStore(BY_SEQ_STORE).index('_doc_id_rev');

      index.get(key).onsuccess = function (e) {
        doc = e.target.result;
        if (doc && doc._doc_id_rev) {
          delete(doc._doc_id_rev);
        }
        if (!doc) {
          err = errors.MISSING_DOC;
          return finish();
        }
        finish();
      };
    };
  };

  api._getAttachment = function (attachment, opts, callback) {
    var result;
    var txn;
    opts = utils.extend(true, {}, opts);
    if (opts.ctx) {
      txn = opts.ctx;
    } else {
      txn = idb.transaction([DOC_STORE, BY_SEQ_STORE, ATTACH_STORE], 'readonly');
    }
    var digest = attachment.digest;
    var type = attachment.content_type;

    txn.objectStore(ATTACH_STORE).get(digest).onsuccess = function (e) {
      var data = e.target.result.body;
      if (opts.encode) {
        if (blobSupport) {
          var reader = new FileReader();
          reader.onloadend = function (e) {
            result = btoa(this.result);
            callback(null, result);
          };
          reader.readAsBinaryString(data);
        } else {
          result = data;
          callback(null, result);
        }
      } else {
        if (blobSupport) {
          result = data;
        } else {
          data = utils.fixBinary(atob(data));
          result = utils.createBlob([data], {type: type});
        }
        callback(null, result);
      }
    };
  };

  function allDocsKeysQuery(totalRows, opts, callback) {
    var keys = opts.keys;
    var descending = 'descending' in opts ? opts.descending : false;

    if (!keys.length) { // empty list is okay
      callback(null, {
        offset : opts.skip,
        rows : [],
        total_rows : totalRows
      });
    } else {
      // do a separate "key" query for each key in the keys array
      var resultsToCollate = [];
      keys.forEach(function (key) {
        var subOpts = utils.extend(true, {}, opts);
        subOpts.keys_request = true; // internal param, says this is a "keys" request
        subOpts.key = key;
        delete subOpts.keys;
        delete subOpts.skip;
        delete subOpts.limit;

        allDocsNormalQuery(totalRows, subOpts, function (err, res) {
          resultsToCollate.push({err : err, res : res, key : key});
          if (resultsToCollate.length === keys.length) {
            // all done, time to collate
            var keysToResults = {};
            for (var i = 0; i < resultsToCollate.length; i++) {
              var result = resultsToCollate[i];
              if (result.err) {
                callback(err);
                return;
              } else {
                keysToResults[result.key] = result;
              }
            }
            var results = [];
            keys.forEach(function (key) {
              var result = keysToResults[key];
              if (result.res.rows.length) {
                results.push(result.res.rows[0]); // only one result ever
              } else {
                results.push({"key": key, "error": "not_found"});
              }
            });
            if (descending) {
              results = results.reverse();
            }
            callback(null, {
              total_rows: totalRows,
              offset: opts.skip,
              rows: ('limit' in opts) ? results.slice(opts.skip, opts.limit + opts.skip) :
                (opts.skip > 0) ? results.slice(opts.skip) : results
            });
          }
        });
      });
    }
  }

  function allDocsNormalQuery(totalRows, opts, callback) {
    var start = 'startkey' in opts ? opts.startkey : false;
    var end = 'endkey' in opts ? opts.endkey : false;
    var key = 'key' in opts ? opts.key : false;

    var descending = 'descending' in opts && opts.descending ? 'prev' : null;

    var skipped = 0;

    var manualDescEnd = false;
    if (descending && start && end) {
      // unfortunately IDB has a quirk where IDBKeyRange.bound is invalid if the
      // start is less than the end, even in descending mode.  Best bet
      // is just to handle it manually in that case.
      manualDescEnd = end;
      end = false;
    }

    var keyRange;
    try {
      keyRange = start && end ? global.IDBKeyRange.bound(start, end)
        : start ? (descending ? global.IDBKeyRange.upperBound(start) : global.IDBKeyRange.lowerBound(start))
        : end ? (descending ? global.IDBKeyRange.lowerBound(end) : global.IDBKeyRange.upperBound(end))
        : key ? global.IDBKeyRange.only(key) : null;
    } catch (e) {
      if (e.name === "DataError" && e.code === 0) {
        // data error, start is less than end
        return callback(null, {total_rows : totalRows, offset : opts.skip, rows : []}); // no docs possible
      } else {
        return callback(errors.error(errors.IDB_ERROR, e.name, e.message));
      }
    }

    var transaction = idb.transaction([DOC_STORE, BY_SEQ_STORE], 'readonly');
    transaction.oncomplete = function () {
      callback(null, {
        total_rows: totalRows,
        offset: opts.skip,
        rows: results
      });
    };

    var oStore = transaction.objectStore(DOC_STORE);
    var oCursor = descending ? oStore.openCursor(keyRange, descending)
      : oStore.openCursor(keyRange);
    var results = [];
    oCursor.onsuccess = function (e) {
      if (!e.target.result) {
        return;
      }
      var cursor = e.target.result;
      var metadata = cursor.value;

      function allDocsInner(metadata, data) {
        if (utils.isLocalId(metadata.id)) {
          return cursor['continue']();
        }
        var doc = {
          id: metadata.id,
          key: metadata.id,
          value: {
            rev: merge.winningRev(metadata)
          }
        };
        if (opts.include_docs) {
          doc.doc = data;
          doc.doc._rev = merge.winningRev(metadata);
          if (doc.doc._doc_id_rev) {
            delete(doc.doc._doc_id_rev);
          }
          if (opts.conflicts) {
            doc.doc._conflicts = merge.collectConflicts(metadata);
          }
          for (var att in doc.doc._attachments) {
            if (doc.doc._attachments.hasOwnProperty(att)) {
              doc.doc._attachments[att].stub = true;
            }
          }
        }
        if (opts.keys_request) {
          // deleted docs are okay with keys_requests
          if (utils.isDeleted(metadata)) {
            doc.value.deleted = true;
            doc.doc = null;
          }
          results.push(doc);
        } else if (!utils.isDeleted(metadata)) {
          if (!results.length && opts.skip > 0 && skipped < opts.skip) {
            skipped++;
          } else if (manualDescEnd && doc.key <= manualDescEnd) {
            if (doc.key === manualDescEnd) {
              results.push(doc);
            }
            return; // done reading
          } else if ('limit' in opts && results.length === opts.limit) {
            return; // done reading
          } else {
            results.push(doc);
          }
        }
        cursor['continue']();
      }

      if (!opts.include_docs) {
        allDocsInner(metadata);
      } else {
        var index = transaction.objectStore(BY_SEQ_STORE).index('_doc_id_rev');
        var mainRev = merge.winningRev(metadata);
        var key = metadata.id + "::" + mainRev;
        index.get(key).onsuccess = function (event) {
          allDocsInner(cursor.value, event.target.result);
        };
      }
    };
  }

  api._allDocs = function idb_allDocs(opts, callback) {

    // first count the total_rows using the undeleted/non-local count
    var txn = idb.transaction([DOC_STORE], 'readonly');

    var totalRows;
    function countUndeletedNonlocalDocs(e) {
      totalRows = e.target.result;
    }

    var index = txn.objectStore(DOC_STORE).index('deletedOrLocal');
    index.count(global.IDBKeyRange.only("0")).onsuccess = countUndeletedNonlocalDocs;

    txn.onerror = idbError(callback);

    txn.oncomplete = function () {
      if ('keys' in opts) {
        allDocsKeysQuery(totalRows, opts, callback);
      } else {
        allDocsNormalQuery(totalRows, opts, callback);
      }
    };
  };

  api._info = function idb_info(callback) {
    var count = 0;
    var update_seq = 0;
    var txn = idb.transaction([DOC_STORE, META_STORE], 'readonly');

    function fetchUpdateSeq(e) {
      update_seq = e.target.result && e.target.result.updateSeq || 0;
    }

    function countDocs(e) {
      var cursor = e.target.result;
      if (!cursor) {
        txn.objectStore(META_STORE).get(META_STORE).onsuccess = fetchUpdateSeq;
        return;
      }
      if (cursor.value.deleted !== true) {
        count++;
      }
      cursor['continue']();
    }

    txn.oncomplete = function () {
      callback(null, {
        db_name: name,
        doc_count: count,
        update_seq: update_seq
      });
    };

    txn.objectStore(DOC_STORE).openCursor().onsuccess = countDocs;
  };

  api._changes = function idb_changes(opts) {
    opts = utils.extend(true, {}, opts);

    if (opts.continuous) {
      var id = name + ':' + utils.uuid();
      opts.cancelled = false;
      IdbPouch.Changes.addListener(name, id, api, opts);
      IdbPouch.Changes.notify(name);
      return {
        cancel: function () {
          opts.complete(null, {status: 'cancelled'});
          opts.complete = null;
          opts.cancelled = true;
          IdbPouch.Changes.removeListener(name, id);
        }
      };
    }

    var descending = opts.descending ? 'prev' : null;
    var last_seq = 0;

    // Ignore the `since` parameter when `descending` is true
    opts.since = opts.since && !descending ? opts.since : 0;

    var results = [], resultIndices = {}, dedupResults = [];
    var txn;

    function fetchChanges() {
      txn = idb.transaction([DOC_STORE, BY_SEQ_STORE]);
      txn.oncomplete = onTxnComplete;

      var req;

      if (descending) {
        req = txn.objectStore(BY_SEQ_STORE)
            .openCursor(global.IDBKeyRange.lowerBound(opts.since, true), descending);
      } else {
        req = txn.objectStore(BY_SEQ_STORE)
            .openCursor(global.IDBKeyRange.lowerBound(opts.since, true));
      }

      req.onsuccess = onsuccess;
      req.onerror = onerror;
    }

    fetchChanges();

    function onsuccess(event) {
      if (!event.target.result) {
        // Filter out null results casued by deduping
        for (var i = 0, l = results.length; i < l; i++) {
          var result = results[i];
          if (result) {
            dedupResults.push(result);
          }
        }
        return false;
      }

      var cursor = event.target.result;

      // Try to pre-emptively dedup to save us a bunch of idb calls
      var changeId = cursor.value._id;
      var changeIdIndex = resultIndices[changeId];
      if (changeIdIndex !== undefined) {
        results[changeIdIndex].seq = cursor.key;
        // update so it has the later sequence number
        results.push(results[changeIdIndex]);
        results[changeIdIndex] = null;
        resultIndices[changeId] = results.length - 1;
        return cursor['continue']();
      }

      var index = txn.objectStore(DOC_STORE);
      index.get(cursor.value._id).onsuccess = function (event) {
        var metadata = event.target.result;
        if (utils.isLocalId(metadata.id)) {
          return cursor['continue']();
        }

        if (last_seq < metadata.seq) {
          last_seq = metadata.seq;
        }

        var mainRev = merge.winningRev(metadata);
        var key = metadata.id + "::" + mainRev;
        var index = txn.objectStore(BY_SEQ_STORE).index('_doc_id_rev');
        index.get(key).onsuccess = function (docevent) {
          var doc = docevent.target.result;
          delete doc['_doc_id_rev'];

          doc._rev = mainRev;
          var change = opts.processChange(doc, metadata, opts);
          change.seq = cursor.key;

          // Dedupe the changes feed
          var changeId = change.id, changeIdIndex = resultIndices[changeId];
          if (changeIdIndex !== undefined) {
            results[changeIdIndex] = null;
          }
          results.push(change);
          resultIndices[changeId] = results.length - 1;
          cursor['continue']();
        };
      };
    }

    function onTxnComplete() {
      utils.processChanges(opts, dedupResults, last_seq);
    }
  };

  api._close = function (callback) {
    if (idb === null) {
      return callback(errors.NOT_OPEN);
    }

    // https://developer.mozilla.org/en-US/docs/IndexedDB/IDBDatabase#close
    // "Returns immediately and closes the connection in a separate thread..."
    idb.close();
    callback();
  };

  api._getRevisionTree = function (docId, callback) {
    var txn = idb.transaction([DOC_STORE], 'readonly');
    var req = txn.objectStore(DOC_STORE).get(docId);
    req.onsuccess = function (event) {
      var doc = event.target.result;
      if (!doc) {
        callback(errors.MISSING_DOC);
      } else {
        callback(null, doc.rev_tree);
      }
    };
  };

  // This function removes revisions of document docId
  // which are listed in revs and sets this document
  // revision to to rev_tree
  api._doCompaction = function (docId, rev_tree, revs, callback) {
    var txn = idb.transaction([DOC_STORE, BY_SEQ_STORE], 'readwrite');

    var index = txn.objectStore(DOC_STORE);
    index.get(docId).onsuccess = function (event) {
      var metadata = event.target.result;
      metadata.rev_tree = rev_tree;

      var count = revs.length;
      revs.forEach(function (rev) {
        var index = txn.objectStore(BY_SEQ_STORE).index('_doc_id_rev');
        var key = docId + "::" + rev;
        index.getKey(key).onsuccess = function (e) {
          var seq = e.target.result;
          if (!seq) {
            return;
          }
          txn.objectStore(BY_SEQ_STORE)['delete'](seq);

          count--;
          if (!count) {
            if (metadata) {
              var deleted = utils.isDeleted(metadata);
              var local = utils.isLocalId(metadata.id);
              metadata = utils.extend(true, {deletedOrLocal : (deleted || local) ? "1" : "0"}, metadata);
            }
            txn.objectStore(DOC_STORE).put(metadata);
          }
        };
      });
    };
    txn.oncomplete = function () {
      utils.call(callback);
    };
  };

}

IdbPouch.valid = function () {
  return global.indexedDB && isModernIdb();
};

IdbPouch.destroy = utils.toPromise(function (name, opts, callback) {
  if (!('openReqList' in IdbPouch)) {
    IdbPouch.openReqList = {};
  }
  IdbPouch.Changes.clearListeners(name);

  //Close open request for "name" database to fix ie delay.
  if (IdbPouch.openReqList[name] && IdbPouch.openReqList[name].result) {
    IdbPouch.openReqList[name].result.close();
  }
  var req = global.indexedDB.deleteDatabase(name);

  req.onsuccess = function () {
    //Remove open request from the list.
    if (IdbPouch.openReqList[name]) {
      IdbPouch.openReqList[name] = null;
    }
    callback();
  };

  req.onerror = idbError(callback);
});

IdbPouch.Changes = new utils.Changes();

module.exports = IdbPouch;

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../deps/errors":8,"../merge":14,"../utils":18}],4:[function(_dereq_,module,exports){
(function (global){
'use strict';

var utils = _dereq_('../utils');
var merge = _dereq_('../merge');
var errors = _dereq_('../deps/errors');
function quote(str) {
  return "'" + str + "'";
}

function openDB() {
  if (typeof global !== 'undefined') {
    if (global.navigator && global.navigator.sqlitePlugin &&
        global.navigator.sqlitePlugin.openDatabase) {
      return navigator.sqlitePlugin.openDatabase
        .apply(navigator.sqlitePlugin, arguments);
    } else if (global.sqlitePlugin && global.sqlitePlugin.openDatabase) {
      return global.sqlitePlugin.openDatabase
        .apply(global.sqlitePlugin, arguments);
    } else {
      return global.openDatabase.apply(global, arguments);
    }
  }
}

var POUCH_VERSION = 1;
var POUCH_SIZE = 5 * 1024 * 1024;
var ADAPTER_VERSION = 2; // used to manage migrations

// The object stores created for each database
// DOC_STORE stores the document meta data, its revision history and state
var DOC_STORE = quote('document-store');
// BY_SEQ_STORE stores a particular version of a document, keyed by its
// sequence id
var BY_SEQ_STORE = quote('by-sequence');
// Where we store attachments
var ATTACH_STORE = quote('attach-store');
var META_STORE = quote('metadata-store');

// these indexes cover the ground for most allDocs queries
var BY_SEQ_STORE_DELETED_INDEX_SQL = 'CREATE INDEX IF NOT EXISTS \'by-seq-deleted-idx\' ON ' +
  BY_SEQ_STORE + ' (seq, deleted)';
var DOC_STORE_LOCAL_INDEX_SQL = 'CREATE INDEX IF NOT EXISTS \'doc-store-local-idx\' ON ' +
  DOC_STORE + ' (local, id)';
var DOC_STORE_WINNINGSEQ_INDEX_SQL = 'CREATE INDEX IF NOT EXISTS \'doc-winningseq-idx\' ON ' +
  DOC_STORE + ' (winningseq)';


var idRequests = [];
var cachedDatabases = {};

function unknownError(callback) {
  return function (event) {
    // event may actually be a SQLError object, so report is as such
    var errorNameMatch = event && event.constructor.toString()
      .match(/function ([^\(]+)/);
    var errorName = (errorNameMatch && errorNameMatch[1]) || event.type;
    var errorReason = event.target || event.message;
    callback(errors.error(errors.WSQ_ERROR, errorReason, errorName));
  };
}

function parseHexString(str) {
  var result = '';
  for (var i = 0, len = str.length; i < len; i += 2) {
    result += String.fromCharCode(parseInt(str.substring(i, i + 2), 16));
  }
  return result;
}

// Safari is weird, it encodes everything with bonus \u0000 characters after
// every character rather than user agent sniff, we test every odd
// character for \u0000
function isMangledUnicode(str) {
  for (var i = 1, len = str.length; i < len; i += 2) {
    if (str.charAt(i) !== '\u0000') {
      return false;
    }
  }
  return true;
}

// unmangle the aforementioned Safari atrocity
function unmangleUnicode(str) {
  var result = '';
  for (var i = 0, len = str.length; i < len; i += 2) {
    result += str.charAt(i);
  }
  return result;
}

// used to deal with utf8 encoding that occurs in most sqlite implementations
// partially taken from
// http://ecmanaut.blogspot.ca/2006/07/encoding-decoding-utf8-in-javascript.html
function decodeUtf8(str) {
  var result;
  try {
    result = decodeURIComponent(window.escape(str));
  } catch (err) {
    // URI error in safari, string is already escaped but still possibly mangled
    result = str;
  }
  return isMangledUnicode(result) ? unmangleUnicode(result) : result;
}
function WebSqlPouch(opts, callback) {
  var api = this;
  var instanceId = null;
  var name = opts.name;

  var db = cachedDatabases[name];
  if (!db) {
    cachedDatabases[name] = db = openDB(name, POUCH_VERSION, name, POUCH_SIZE);
  }
  if (!db) {
    return callback(errors.UNKNOWN_ERROR);
  }

  function dbCreated() {
    callback(null, api);
  }

  // In this migration, we added the 'deleted' and 'local' columns to the by-seq and doc store tables.
  // To preserve existing user data, we re-process all the existing JSON
  // and add these values.
  // Called migration2 because it corresponds to adapter version (db_version) #2
  function runMigration2(tx) {

    tx.executeSql(DOC_STORE_WINNINGSEQ_INDEX_SQL); // index used for the join in the allDocs query

    tx.executeSql('ALTER TABLE ' + BY_SEQ_STORE + ' ADD COLUMN deleted TINYINT(1) DEFAULT 0', [], function () {
      tx.executeSql(BY_SEQ_STORE_DELETED_INDEX_SQL);
      tx.executeSql('ALTER TABLE ' + DOC_STORE + ' ADD COLUMN local TINYINT(1) DEFAULT 0', [], function () {
        tx.executeSql(DOC_STORE_LOCAL_INDEX_SQL);

        var sql = 'SELECT ' + DOC_STORE + '.winningseq AS seq, ' + DOC_STORE + '.json AS metadata FROM ' +
          BY_SEQ_STORE + ' JOIN ' + DOC_STORE + ' ON ' + BY_SEQ_STORE + '.seq = ' +
          DOC_STORE + '.winningseq';

        tx.executeSql(sql, [], function (tx, result) {

          var deleted = [];
          var local = [];

          for (var i = 0; i < result.rows.length; i++) {
            var item = result.rows.item(i);
            var seq = item.seq;
            var metadata = JSON.parse(item.metadata);
            if (utils.isDeleted(metadata)) {
              deleted.push(seq);
            }
            if (utils.isLocalId(metadata.id)) {
              local.push(metadata.id);
            }
          }

          tx.executeSql('UPDATE ' + DOC_STORE + 'SET local = 1 WHERE id IN (' + local.map(function () {
            return '?';
          }).join(',') + ')', local);
          tx.executeSql('UPDATE ' + BY_SEQ_STORE + ' SET deleted = 1 WHERE seq IN (' + deleted.map(function () {
            return '?';
          }).join(',') + ')', deleted);
        });
      });
    });
  }

  function onGetInstanceId() {
    while (idRequests.length > 0) {
      var idCallback = idRequests.pop();
      idCallback(null, instanceId);
    }
  }

  function onGetVersion(tx, dbVersion) {
    if (dbVersion === 0) {
      // initial schema

      var meta = 'CREATE TABLE IF NOT EXISTS ' + META_STORE +
        ' (update_seq, dbid, db_version INTEGER)';
      var attach = 'CREATE TABLE IF NOT EXISTS ' + ATTACH_STORE +
        ' (digest, json, body BLOB)';
      var doc = 'CREATE TABLE IF NOT EXISTS ' + DOC_STORE +
        ' (id unique, seq, json, winningseq, local TINYINT(1))';
      var seq = 'CREATE TABLE IF NOT EXISTS ' + BY_SEQ_STORE +
        ' (seq INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, doc_id_rev UNIQUE, json, deleted TINYINT(1))';

      // creates
      tx.executeSql(attach);
      tx.executeSql(doc, [], function () {
        tx.executeSql(DOC_STORE_WINNINGSEQ_INDEX_SQL);
        tx.executeSql(DOC_STORE_LOCAL_INDEX_SQL);
      });
      tx.executeSql(seq, [], function () {
        tx.executeSql(BY_SEQ_STORE_DELETED_INDEX_SQL);
      });
      tx.executeSql(meta, [], function () {
        // mark the update_seq, db version, and new dbid
        var initSeq = 'INSERT INTO ' + META_STORE + ' (update_seq, db_version, dbid) VALUES (?, ?, ?)';
        instanceId = utils.uuid();
        tx.executeSql(initSeq, [0, ADAPTER_VERSION, instanceId]);
        onGetInstanceId();
      });
    } else { // version > 0

      if (dbVersion === 1) {
        runMigration2(tx);
        // mark the db version within this transaction
        tx.executeSql('UPDATE ' + META_STORE + ' SET db_version = ' + ADAPTER_VERSION);
      } // in the future, add more migrations here

      // notify db.id() callers
      tx.executeSql('SELECT dbid FROM ' + META_STORE, [], function (tx, result) {
        instanceId = result.rows.item(0).dbid;
        onGetInstanceId();
      });
    }
  }

  function setup() {

    db.transaction(function (tx) {
      // first get the version
      tx.executeSql('SELECT sql FROM sqlite_master WHERE tbl_name = ' + META_STORE, [], function (tx, result) {
        if (!result.rows.length) {
          // database hasn't even been created yet (version 0)
          onGetVersion(tx, 0);
        } else if (!/db_version/.test(result.rows.item(0).sql)) {
          // table was created, but without the new db_version column, so add it.
          tx.executeSql('ALTER TABLE ' + META_STORE + ' ADD COLUMN db_version INTEGER', [], function () {
            onGetVersion(tx, 1); // before version 2, this column didn't even exist
          });
        } else { // column exists, we can safely get it
          tx.executeSql('SELECT db_version FROM ' + META_STORE, [], function (tx, result) {
            var dbVersion = result.rows.item(0).db_version;
            onGetVersion(tx, dbVersion);
          });
        }
      });
    }, unknownError(callback), dbCreated);
  }

  if (utils.isCordova() && typeof global !== 'undefined') {
    //to wait until custom api is made in pouch.adapters before doing setup
    global.addEventListener(name + '_pouch', function cordova_init() {
      global.removeEventListener(name + '_pouch', cordova_init, false);
      setup();
    }, false);
  } else {
    setup();
  }


  api.type = function () {
    return 'websql';
  };

  api._id = utils.toPromise(function (callback) {
    callback(null, instanceId);
  });

  api._info = function (callback) {
    db.transaction(function (tx) {
      var sql = 'SELECT COUNT(id) AS count FROM ' + DOC_STORE;
      tx.executeSql(sql, [], function (tx, result) {
        var doc_count = result.rows.item(0).count;
        var updateseq = 'SELECT update_seq FROM ' + META_STORE;
        tx.executeSql(updateseq, [], function (tx, result) {
          var update_seq = result.rows.item(0).update_seq;
          callback(null, {
            db_name: name,
            doc_count: doc_count,
            update_seq: update_seq
          });
        });
      });
    });
  };

  api._bulkDocs = function (req, opts, callback) {

    var newEdits = opts.new_edits;
    var userDocs = req.docs;
    var docsWritten = 0;

    // Parse the docs, give them a sequence number for the result
    var docInfos = userDocs.map(function (doc, i) {
      var newDoc = utils.parseDoc(doc, newEdits);
      newDoc._bulk_seq = i;
      return newDoc;
    });

    var docInfoErrors = docInfos.filter(function (docInfo) {
      return docInfo.error;
    });
    if (docInfoErrors.length) {
      return callback(docInfoErrors[0]);
    }

    var tx;
    var results = [];
    var fetchedDocs = {};

    function sortByBulkSeq(a, b) {
      return a._bulk_seq - b._bulk_seq;
    }

    function complete(event) {
      var aresults = [];
      results.sort(sortByBulkSeq);
      results.forEach(function (result) {
        delete result._bulk_seq;
        if (result.error) {
          aresults.push(result);
          return;
        }
        var metadata = result.metadata;
        var rev = merge.winningRev(metadata);

        aresults.push({
          ok: true,
          id: metadata.id,
          rev: rev
        });

        if (utils.isLocalId(metadata.id)) {
          return;
        }

        docsWritten++;

        WebSqlPouch.Changes.notify(name);
        WebSqlPouch.Changes.notifyLocalWindows(name);
      });

      var updateseq = 'SELECT update_seq FROM ' + META_STORE;
      tx.executeSql(updateseq, [], function (tx, result) {
        var update_seq = result.rows.item(0).update_seq + docsWritten;
        var sql = 'UPDATE ' + META_STORE + ' SET update_seq=?';
        tx.executeSql(sql, [update_seq], function () {
          callback(null, aresults);
        });
      });
    }

    function preprocessAttachment(att, finish) {
      if (att.stub) {
        return finish();
      }
      if (typeof att.data === 'string') {
        try {
          att.data = atob(att.data);
        } catch (e) {
          var err = errors.error(errors.BAD_ARG,
                                "Attachments need to be base64 encoded");
          return callback(err);
        }
        var data = utils.fixBinary(att.data);
        att.data = utils.createBlob([data], {type: att.content_type});
      }
      var reader = new FileReader();
      reader.onloadend = function (e) {
        att.data = this.result;
        att.digest = 'md5-' + utils.Crypto.MD5(this.result);
        finish();
      };
      reader.readAsBinaryString(att.data);
    }

    function preprocessAttachments(callback) {
      if (!docInfos.length) {
        return callback();
      }

      var docv = 0;

      docInfos.forEach(function (docInfo) {
        var attachments = docInfo.data && docInfo.data._attachments ?
          Object.keys(docInfo.data._attachments) : [];
        var recv = 0;

        if (!attachments.length) {
          return done();
        }

        function processedAttachment() {
          recv++;
          if (recv === attachments.length) {
            done();
          }
        }

        for (var key in docInfo.data._attachments) {
          if (docInfo.data._attachments.hasOwnProperty(key)) {
            preprocessAttachment(docInfo.data._attachments[key], processedAttachment);
          }
        }
      });

      function done() {
        docv++;
        if (docInfos.length === docv) {
          callback();
        }
      }
    }

    function writeDoc(docInfo, callback, isUpdate) {

      function finish() {
        var data = docInfo.data;
        var sql = 'INSERT INTO ' + BY_SEQ_STORE + ' (doc_id_rev, json, deleted) VALUES (?, ?, ?);';
        var sqlArgs = [
          data._id + "::" + data._rev,
          JSON.stringify(data),
          utils.isDeleted(docInfo.metadata, docInfo.metadata.rev) ? 1 : 0
        ];
        tx.executeSql(sql, sqlArgs, dataWritten);
      }

      function collectResults(attachmentErr) {
        if (!err) {
          if (attachmentErr) {
            err = attachmentErr;
            callback(err);
          } else if (recv === attachments.length) {
            finish();
          }
        }
      }

      var err = null;
      var recv = 0;

      docInfo.data._id = docInfo.metadata.id;
      docInfo.data._rev = docInfo.metadata.rev;

      if (utils.isDeleted(docInfo.metadata, docInfo.metadata.rev)) {
        docInfo.data._deleted = true;
      }

      var attachments = docInfo.data._attachments ?
        Object.keys(docInfo.data._attachments) : [];

      function attachmentSaved(err) {
        recv++;
        collectResults(err);
      }

      for (var key in docInfo.data._attachments) {
        if (!docInfo.data._attachments[key].stub) {
          var data = docInfo.data._attachments[key].data;
          delete docInfo.data._attachments[key].data;
          var digest = docInfo.data._attachments[key].digest;
          saveAttachment(docInfo, digest, data, attachmentSaved);
        } else {
          recv++;
          collectResults();
        }
      }

      if (!attachments.length) {
        finish();
      }

      function dataWritten(tx, result) {
        var seq = docInfo.metadata.seq = result.insertId;
        delete docInfo.metadata.rev;

        var mainRev = merge.winningRev(docInfo.metadata);

        var sql = isUpdate ?
          'UPDATE ' + DOC_STORE + ' SET seq=?, json=?, winningseq=(SELECT seq FROM ' +
          BY_SEQ_STORE + ' WHERE doc_id_rev=?) WHERE id=?' :
          'INSERT INTO ' + DOC_STORE + ' (id, seq, winningseq, json, local) VALUES (?, ?, ?, ?, ?);';
        var metadataStr = JSON.stringify(docInfo.metadata);
        var key = docInfo.metadata.id + "::" + mainRev;
        var local = utils.isLocalId(docInfo.metadata.id) ? 1 : 0;
        var params = isUpdate ?
          [seq, metadataStr, key, docInfo.metadata.id] :
          [docInfo.metadata.id, seq, seq, metadataStr, local];
        tx.executeSql(sql, params, function (tx, result) {
          results.push(docInfo);
          callback();
        });
      }
    }

    function updateDoc(oldDoc, docInfo) {
      var merged = merge.merge(oldDoc.rev_tree, docInfo.metadata.rev_tree[0], 1000);
      var inConflict = (utils.isDeleted(oldDoc) &&
                        utils.isDeleted(docInfo.metadata)) ||
        (!utils.isDeleted(oldDoc) &&
         newEdits && merged.conflicts !== 'new_leaf');

      if (inConflict) {
        results.push(makeErr(errors.REV_CONFLICT, docInfo._bulk_seq));
        return processDocs();
      }

      docInfo.metadata.rev_tree = merged.tree;
      writeDoc(docInfo, processDocs, true);
    }

    function insertDoc(docInfo) {
      // Cant insert new deleted documents
      if ('was_delete' in opts && utils.isDeleted(docInfo.metadata)) {
        results.push(errors.MISSING_DOC);
        return processDocs();
      }
      writeDoc(docInfo, processDocs, false);
    }

    function processDocs() {
      if (!docInfos.length) {
        return complete();
      }
      var currentDoc = docInfos.shift();
      var id = currentDoc.metadata.id;
      if (id in fetchedDocs) {
        updateDoc(fetchedDocs[id], currentDoc);
      } else {
        // if we have newEdits=false then we can update the same
        // document twice in a single bulk docs call
        fetchedDocs[id] = currentDoc.metadata;
        insertDoc(currentDoc);
      }
    }

    // Insert sequence number into the error so we can sort later
    function makeErr(err, seq) {
      err._bulk_seq = seq;
      return err;
    }

    function saveAttachment(docInfo, digest, data, callback) {
      var ref = [docInfo.metadata.id, docInfo.metadata.rev].join('@');
      var newAtt = {digest: digest};
      var sql = 'SELECT digest, json FROM ' + ATTACH_STORE + ' WHERE digest=?';
      tx.executeSql(sql, [digest], function (tx, result) {
        if (!result.rows.length) {
          newAtt.refs = {};
          newAtt.refs[ref] = true;
          sql = 'INSERT INTO ' + ATTACH_STORE + '(digest, json, body) VALUES (?, ?, ?)';
          tx.executeSql(sql, [digest, JSON.stringify(newAtt), data], function () {
            callback();
          });
        } else {
          newAtt.refs = JSON.parse(result.rows.item(0).json).refs;
          sql = 'UPDATE ' + ATTACH_STORE + ' SET json=?, body=? WHERE digest=?';
          tx.executeSql(sql, [JSON.stringify(newAtt), data, digest], function () {
            callback();
          });
        }
      });
    }

    function metadataFetched(tx, results) {
      for (var j = 0; j < results.rows.length; j++) {
        var row = results.rows.item(j);
        fetchedDocs[row.id] = JSON.parse(row.json);
      }
      processDocs();
    }

    preprocessAttachments(function () {
      db.transaction(function (txn) {
        tx = txn;
        var sql = 'SELECT * FROM ' + DOC_STORE + ' WHERE id IN ' +
          '(' + docInfos.map(function () {return '?'; }).join(',') + ')';
        var queryArgs = docInfos.map(function (d) { return d.metadata.id; });
        tx.executeSql(sql, queryArgs, metadataFetched);
      }, unknownError(callback));
    });
  };

  api._get = function (id, opts, callback) {
    opts = utils.extend(true, {}, opts);
    var doc;
    var metadata;
    var err;
    if (!opts.ctx) {
      db.transaction(function (txn) {
        opts.ctx = txn;
        api._get(id, opts, callback);
      });
      return;
    }
    var tx = opts.ctx;

    function finish() {
      callback(err, {doc: doc, metadata: metadata, ctx: tx});
    }

    var sql = 'SELECT * FROM ' + DOC_STORE + ' WHERE id=?';
    tx.executeSql(sql, [id], function (a, results) {
      if (!results.rows.length) {
        err = errors.MISSING_DOC;
        return finish();
      }
      metadata = JSON.parse(results.rows.item(0).json);
      if (utils.isDeleted(metadata) && !opts.rev) {
        err = errors.error(errors.MISSING_DOC, "deleted");
        return finish();
      }

      var rev = merge.winningRev(metadata);
      var key = opts.rev ? opts.rev : rev;
      key = metadata.id + '::' + key;
      var sql = 'SELECT * FROM ' + BY_SEQ_STORE + ' WHERE doc_id_rev=?';
      tx.executeSql(sql, [key], function (tx, results) {
        if (!results.rows.length) {
          err = errors.MISSING_DOC;
          return finish();
        }
        doc = JSON.parse(results.rows.item(0).json);

        finish();
      });
    });
  };

  api._allDocs = function (opts, callback) {
    var results = [];
    var resultsMap = {};
    var totalRows;

    var from = BY_SEQ_STORE + ' JOIN ' + DOC_STORE + ' ON ' + BY_SEQ_STORE + '.seq = ' +
      DOC_STORE + '.winningseq';

    var start = 'startkey' in opts ? opts.startkey : false;
    var end = 'endkey' in opts ? opts.endkey : false;
    var key = 'key' in opts ? opts.key : false;
    var descending = 'descending' in opts ? opts.descending : false;
    var keys = 'keys' in opts ? opts.keys : false;
    var limit = 'limit' in opts ? opts.limit : false;
    var offset = 'skip' in opts ? opts.skip : false;

    var sqlArgs = [];
    var criteria = [DOC_STORE + '.local = 0'];

    if (key !== false) {
      criteria.push(DOC_STORE + '.id = ?');
      sqlArgs.push(key);
    } else if (keys !== false) {
      criteria.push(DOC_STORE + '.id in (' + keys.map(function () {
        return '?';
      }).join(',') + ')');
      sqlArgs = sqlArgs.concat(keys);
    } else if (start !== false || end !== false) {
      if (start !== false) {
        criteria.push(DOC_STORE + '.id ' + (descending ? '<=' : '>=') + ' ?');
        sqlArgs.push(start);
      }
      if (end !== false) {
        criteria.push(DOC_STORE + '.id ' + (descending ? '>=' : '<=') + ' ?');
        sqlArgs.push(end);
      }
      if (key !== false) {
        criteria.push(DOC_STORE + '.id = ?');
        sqlArgs.push(key);
      }
    }

    if (keys === false) {
      // report deleted if keys are specified
      criteria.push(BY_SEQ_STORE + '.deleted = 0');
    }

    db.transaction(function (tx) {

      // first count up the total rows
      var sql = 'SELECT COUNT(' + DOC_STORE + '.id) AS \'num\' FROM ' +
        from + ' WHERE ' + BY_SEQ_STORE + '.deleted = 0 AND ' +
        // local docs are e.g. '_local_foo'
        DOC_STORE + '.local = 0';

      tx.executeSql(sql, [], function (tx, result) {
        totalRows = result.rows.item(0).num;

        // then actually fetch the documents

        var sql = 'SELECT ' + DOC_STORE + '.id, ' + BY_SEQ_STORE + '.seq, ' +
          BY_SEQ_STORE + '.json AS data, ' + DOC_STORE + '.json AS metadata FROM ' + from;

        if (criteria.length) {
          sql += ' WHERE ' + criteria.join(' AND ');
        }
        sql += ' ORDER BY ' + DOC_STORE + '.id ' + (descending ? 'DESC' : 'ASC');
        if (limit !== false) {
          sql += ' LIMIT ' + limit;
        }
        if (offset !== false && offset > 0) {
          if (limit === false) {
            // sqlite requires limit with offset, -1 acts as infinity here
            sql += ' LIMIT -1';
          }
          sql += ' OFFSET ' + offset;
        }

        tx.executeSql(sql, sqlArgs, function (tx, result) {
          for (var i = 0, l = result.rows.length; i < l; i++) {
            var doc = result.rows.item(i);
            var metadata = JSON.parse(doc.metadata);
            var data = JSON.parse(doc.data);
            doc = {
              id: metadata.id,
              key: metadata.id,
              value: {rev: merge.winningRev(metadata)}
            };
            if (opts.include_docs) {
              doc.doc = data;
              doc.doc._rev = merge.winningRev(metadata);
              if (opts.conflicts) {
                doc.doc._conflicts = merge.collectConflicts(metadata);
              }
              for (var att in doc.doc._attachments) {
                if (doc.doc._attachments.hasOwnProperty(att)) {
                  doc.doc._attachments[att].stub = true;
                }
              }
            }
            if ('keys' in opts) {
              if (opts.keys.indexOf(metadata.id) > -1) {
                if (utils.isDeleted(metadata)) {
                  doc.value.deleted = true;
                  doc.doc = null;
                }
                resultsMap[doc.id] = doc;
              }
            } else {
              results.push(doc);
            }
          }
        });
      });
    }, unknownError(callback), function () {
      if ('keys' in opts) {
        opts.keys.forEach(function (key) {
          if (key in resultsMap) {
            results.push(resultsMap[key]);
          } else {
            results.push({"key": key, "error": "not_found"});
          }
        });
        if (opts.descending) {
          results.reverse();
        }
      }
      callback(null, {
        total_rows: totalRows,
        offset: opts.skip,
        rows: results
      });
    });
  };

  api._changes = function idb_changes(opts) {
    opts = utils.extend(true, {}, opts);


    //console.log(name + ': Start Changes Feed: continuous=' + opts.continuous);


    if (opts.continuous) {
      var id = name + ':' + utils.uuid();
      opts.cancelled = false;
      WebSqlPouch.Changes.addListener(name, id, api, opts);
      WebSqlPouch.Changes.notify(name);
      return {
        cancel: function () {
          opts.complete(null, {status: 'cancelled'});
          opts.complete = null;
          opts.cancelled = true;
          WebSqlPouch.Changes.removeListener(name, id);
        }
      };
    }

    var descending = opts.descending;

    // Ignore the `since` parameter when `descending` is true
    opts.since = opts.since && !descending ? opts.since : 0;

    var results = [];

    function fetchChanges() {
      var sql = 'SELECT ' + DOC_STORE + '.id, ' + BY_SEQ_STORE + '.seq, ' +
        BY_SEQ_STORE + '.json AS data, ' + DOC_STORE + '.json AS metadata FROM ' +
        BY_SEQ_STORE + ' JOIN ' + DOC_STORE + ' ON ' + BY_SEQ_STORE + '.seq = ' +
        DOC_STORE + '.winningseq WHERE ' + DOC_STORE + '.seq > ' + opts.since +
        ' ORDER BY ' + DOC_STORE + '.seq ' + (descending ? 'DESC' : 'ASC');

      db.transaction(function (tx) {
        tx.executeSql(sql, [], function (tx, result) {
          var last_seq = 0;
          for (var i = 0, l = result.rows.length; i < l; i++) {
            var res = result.rows.item(i);
            var metadata = JSON.parse(res.metadata);
            if (!utils.isLocalId(metadata.id)) {
              if (last_seq < res.seq) {
                last_seq = res.seq;
              }
              var doc = JSON.parse(res.data);
              var change = opts.processChange(doc, metadata, opts);
              change.seq = res.seq;

              results.push(change);
            }
          }
          utils.processChanges(opts, results, last_seq);
        });
      });
    }

    fetchChanges();
  };

  api._close = function (callback) {
    //WebSQL databases do not need to be closed
    callback();
  };

  api._getAttachment = function (attachment, opts, callback) {
    var res;
    var tx = opts.ctx;
    var digest = attachment.digest;
    var type = attachment.content_type;
    var sql = 'SELECT hex(body) as body FROM ' + ATTACH_STORE + ' WHERE digest=?';
    tx.executeSql(sql, [digest], function (tx, result) {
      // TODO: sqlite normally stores data as utf8, so even the hex() function "encodes" the binary
      // data in utf8 before returning it, and yet hex() is the only way to get the full data. so we do this.
      var data = decodeUtf8(parseHexString(result.rows.item(0).body));
      if (opts.encode) {
        res = btoa(data);
      } else {
        data = utils.fixBinary(data);
        res = utils.createBlob([data], {type: type});
      }
      callback(null, res);
    });
  };

  api._getRevisionTree = function (docId, callback) {
    db.transaction(function (tx) {
      var sql = 'SELECT json AS metadata FROM ' + DOC_STORE + ' WHERE id = ?';
      tx.executeSql(sql, [docId], function (tx, result) {
        if (!result.rows.length) {
          callback(errors.MISSING_DOC);
        } else {
          var data = JSON.parse(result.rows.item(0).metadata);
          callback(null, data.rev_tree);
        }
      });
    });
  };

  api._doCompaction = function (docId, rev_tree, revs, callback) {
    db.transaction(function (tx) {
      var sql = 'SELECT json AS metadata FROM ' + DOC_STORE + ' WHERE id = ?';
      tx.executeSql(sql, [docId], function (tx, result) {
        if (!result.rows.length) {
          return utils.call(callback);
        }
        var metadata = JSON.parse(result.rows.item(0).metadata);
        metadata.rev_tree = rev_tree;

        var sql = 'DELETE FROM ' + BY_SEQ_STORE + ' WHERE doc_id_rev IN (' +
          revs.map(function (rev) {return quote(docId + '::' + rev); }).join(',') + ')';

        tx.executeSql(sql, [], function (tx, result) {
          var sql = 'UPDATE ' + DOC_STORE + ' SET json = ? WHERE id = ?';

          tx.executeSql(sql, [JSON.stringify(metadata), docId], function (tx, result) {
            callback();
          });
        });
      });
    });
  };
}

WebSqlPouch.valid = function () {
  if (typeof global !== 'undefined') {
    if (global.navigator && global.navigator.sqlitePlugin && global.navigator.sqlitePlugin.openDatabase) {
      return true;
    } else if (global.sqlitePlugin && global.sqlitePlugin.openDatabase) {
      return true;
    } else if (global.openDatabase) {
      return true;
    }
  }
  return false;
};

WebSqlPouch.destroy = utils.toPromise(function (name, opts, callback) {
  var self = this;
  var db = openDB(name, POUCH_VERSION, name, POUCH_SIZE);
  db.transaction(function (tx) {
    tx.executeSql('DROP TABLE IF EXISTS ' + DOC_STORE, []);
    tx.executeSql('DROP TABLE IF EXISTS ' + BY_SEQ_STORE, []);
    tx.executeSql('DROP TABLE IF EXISTS ' + ATTACH_STORE, []);
    tx.executeSql('DROP TABLE IF EXISTS ' + META_STORE, []);
  }, unknownError(callback), function () {
    self.emit('destroyed');
    callback();
  });
});

WebSqlPouch.Changes = new utils.Changes();

module.exports = WebSqlPouch;

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"../deps/errors":8,"../merge":14,"../utils":18}],5:[function(_dereq_,module,exports){
(function (global){
/*globals cordova */
"use strict";

var Adapter = _dereq_('./adapter');
var utils = _dereq_('./utils');
var Promise = typeof global.Promise === 'function' ? global.Promise : _dereq_('bluebird');
var TaskQueue = _dereq_('./taskqueue');

function defaultCallback(err) {
  if (err && global.debug) {
    console.error(err);
  }
}
utils.inherits(PouchDBVersion200, Adapter);
function PouchDBVersion200(name, opts, callback) {

  if (!(this instanceof PouchDBVersion200)) {
    return new PouchDBVersion200(name, opts, callback);
  }
  var self = this;
  if (typeof opts === 'function' || typeof opts === 'undefined') {
    callback = opts;
    opts = {};
  }

  if (typeof name === 'object') {
    opts = name;
    name = undefined;
  }
  if (typeof callback === 'undefined') {
    callback = defaultCallback;
  }
  opts = opts || {};
  var oldCB = callback;
  self.auto_compaction = opts.auto_compaction;
  self.prefix = PouchDBVersion200.prefix;
  Adapter.call(self);
  self.taskqueue = new TaskQueue();
  var promise = new Promise(function (fulfill, reject) {
    callback = function (err, resp) {
      if (err) {
        return reject(err);
      }
      delete resp.then;
      fulfill(resp);
    };
  
    opts = utils.extend(true, {}, opts);
    var originalName = opts.name || name;
    var backend, error;
    (function () {
      try {

        if (typeof originalName !== 'string') {
          error = new Error('Missing/invalid DB name');
          error.code = 400;
          throw error;
        }

        backend = PouchDBVersion200.parseAdapter(originalName);
        
        opts.originalName = originalName;
        opts.name = backend.name;
        opts.adapter = opts.adapter || backend.adapter;

        if (!PouchDBVersion200.adapters[opts.adapter]) {
          error = new Error('Adapter is missing');
          error.code = 404;
          throw error;
        }

        if (!PouchDBVersion200.adapters[opts.adapter].valid()) {
          error = new Error('Invalid Adapter');
          error.code = 404;
          throw error;
        }
      } catch (err) {
        self.taskqueue.fail(err);
        self.changes = utils.toPromise(function (opts) {
          if (opts.complete) {
            opts.complete(err);
          }
        });
      }
    }());
    if (error) {
      return reject(error); // constructor error, see above
    }
    self.adapter = opts.adapter;
    // needs access to PouchDBVersion200;
    self.replicate = PouchDBVersion200.replicate.bind(self, self);
    self.replicate.from = function (url, opts, callback) {
      if (typeof opts === 'function') {
        callback = opts;
        opts = {};
      }
      return PouchDBVersion200.replicate(url, self, opts, callback);
    };

    self.replicate.to = function (dbName, opts, callback) {
      if (typeof opts === 'function') {
        callback = opts;
        opts = {};
      }
      return self.replicate(dbName, opts, callback);
    };

    self.replicate.sync = function (dbName, opts, callback) {
      if (typeof opts === 'function') {
        callback = opts;
        opts = {};
      }
      return PouchDBVersion200.sync(self, dbName, opts, callback);
    };
    self.destroy = utils.toPromise(function (callback) {
      var self = this;
      if (!self.taskqueue.isReady) {
        self.taskqueue.addTask('destroy', arguments);
        return;
      }
      self.id(function (err, id) {
        if (err) {
          return callback(err);
        }
        PouchDBVersion200.destroy(id, callback);
      });
    });
    PouchDBVersion200.adapters[opts.adapter].call(self, opts, function (err, db) {
      if (err) {
        if (callback) {
          self.taskqueue.fail(err);
          callback(err);
        }
        return;
      }
      function destructionListner(event) {
        if (event === 'destroyed') {
          self.emit('destroyed');
          PouchDBVersion200.removeListener(opts.name, destructionListner);
        }
      }
      PouchDBVersion200.on(opts.name, destructionListner);
      self.emit('created', self);
      PouchDBVersion200.emit('created', opts.originalName);
      self.taskqueue.ready(self);
      callback(null, self);
      
    });
    if (opts.skipSetup) {
      self.taskqueue.ready(self);
    }

    if (utils.isCordova()) {
      //to inform websql adapter that we can use api
      cordova.fireWindowEvent(opts.name + "_pouch", {});
    }
  });
  promise.then(function (resp) {
    oldCB(null, resp);
  }, oldCB);
  self.then = promise.then.bind(promise);
  //prevent deoptimizing
  (function () {
    try {
      self.catch = promise.catch.bind(promise);
    } catch (e) {}
  }());
}

module.exports = PouchDBVersion200;

}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./adapter":1,"./taskqueue":17,"./utils":18,"bluebird":24}],6:[function(_dereq_,module,exports){
(function (process){
"use strict";

var request = _dereq_('request');
var extend = _dereq_('./extend.js');
var createBlob = _dereq_('./blob.js');
var errors = _dereq_('./errors');
var uuid = _dereq_('../deps/uuid');

function ajax(options, callback) {

  if (typeof options === "function") {
    callback = options;
    options = {};
  }
  options = extend(true, {}, options);
  function call(fun) {
    /* jshint validthis: true */
    var args = Array.prototype.slice.call(arguments, 1);
    if (typeof fun === typeof Function) {
      fun.apply(this, args);
    }
  }

  var defaultOptions = {
    method : "GET",
    headers: {},
    json: true,
    processData: true,
    timeout: 10000,
    cache: false
  };

  options = extend(true, defaultOptions, options);

  // cache-buster, specifically designed to work around IE's aggressive caching
  // see http://www.dashbay.com/2011/05/internet-explorer-caches-ajax/
  if (options.method === 'GET' && !options.cache) {
    var hasArgs = options.url.indexOf('?') !== -1;
    options.url += (hasArgs ? '&' : '?') + '_nonce=' + uuid(16);
  }

  function onSuccess(obj, resp, cb) {
    if (!options.binary && !options.json && options.processData &&
      typeof obj !== 'string') {
      obj = JSON.stringify(obj);
    } else if (!options.binary && options.json && typeof obj === 'string') {
      try {
        obj = JSON.parse(obj);
      } catch (e) {
        // Probably a malformed JSON from server
        call(cb, e);
        return;
      }
    }
    if (Array.isArray(obj)) {
      obj = obj.map(function (v) {
        var obj;
        if (v.ok) {
          return v;
        } else if (v.error && v.error === 'conflict') {
          obj = errors.REV_CONFLICT;
          obj.id = v.id;
          return obj;
        } else if (v.error && v.error === 'forbidden') {
          obj = errors.FORBIDDEN;
          obj.id = v.id;
          obj.reason = v.reason;
          return obj;
        } else if (v.missing) {
          obj = errors.MISSING_DOC;
          obj.missing = v.missing;
          return obj;
        } else {
          return v;
        }
      });
    }
    call(cb, null, obj, resp);
  }

  function onError(err, cb) {
    var errParsed, errObj, errType, key;
    try {
      errParsed = JSON.parse(err.responseText);
      //would prefer not to have a try/catch clause
      for (key in errors) {
        if (errors.hasOwnProperty(key) && errors[key].name === errParsed.error) {
          errType = errors[key];
          break;
        }
      }
      if (!errType) {
        errType = errors.UNKNOWN_ERROR;
        if (err.status) {
          errType.status = err.status;
        }
        if (err.statusText) {
          err.name = err.statusText;
        }
      }
      errObj = errors.error(errType, errParsed.reason);
    } catch (e) {
      for (var key in errors) {
        if (errors.hasOwnProperty(key) && errors[key].status === err.status) {
          errType = errors[key];
          break;
        }
      }
      if (!errType) {
        errType = errors.UNKNOWN_ERROR;
        if (err.status) {
          errType.status = err.status;
        }
        if (err.statusText) {
          err.name = err.statusText;
        }
      }
      errObj = errors.error(errType);
    }
    call(cb, errObj);
  }

  if (process.browser) {
    var timer, timedout = false;
    var xhr;
    if (options.xhr) {
      xhr = new options.xhr();
    } else {
      xhr = new XMLHttpRequest();
    }
    xhr.open(options.method, options.url);
    xhr.withCredentials = true;

    if (options.json) {
      options.headers.Accept = 'application/json';
      options.headers['Content-Type'] = options.headers['Content-Type'] ||
        'application/json';
      if (options.body && options.processData && typeof options.body !== "string") {
        options.body = JSON.stringify(options.body);
      }
    }

    if (options.binary) {
      xhr.responseType = 'arraybuffer';
    }

    var createCookie = function (name, value, days) {
      var expires = "";
      if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toGMTString();
      }
      document.cookie = name + "=" + value + expires + "; path=/";
    };

    for (var key in options.headers) {
      if (key === 'Cookie') {
        var cookie = options.headers[key].split('=');
        createCookie(cookie[0], cookie[1], 10);
      } else {
        xhr.setRequestHeader(key, options.headers[key]);
      }
    }

    if (!("body" in options)) {
      options.body = null;
    }

    var abortReq = function () {
      timedout = true;
      xhr.abort();
      call(onError, xhr, callback);
    };

    xhr.onreadystatechange = function () {
      if (xhr.readyState !== 4 || timedout) {
        return;
      }
      clearTimeout(timer);
      if (xhr.status >= 200 && xhr.status < 300) {
        var data;
        if (options.binary) {
          data = createBlob([xhr.response || ''], {
            type: xhr.getResponseHeader('Content-Type')
          });
        } else {
          data = xhr.responseText;
        }
        call(onSuccess, data, xhr, callback);
      } else {
        call(onError, xhr, callback);
      }
    };

    if (options.timeout > 0) {
      timer = setTimeout(abortReq, options.timeout);
      xhr.onprogress = function () {
        clearTimeout(timer);
        timer = setTimeout(abortReq, options.timeout);
      };
      if (xhr.upload) { // does not exist in ie9
        xhr.upload.onprogress = xhr.onprogress;
      }
    }
    xhr.send(options.body);
    return {abort: abortReq};

  } else {

    if (options.json) {
      if (!options.binary) {
        options.headers.Accept = 'application/json';
      }
      options.headers['Content-Type'] = options.headers['Content-Type'] ||
        'application/json';
    }

    if (options.binary) {
      options.encoding = null;
      options.json = false;
    }

    if (!options.processData) {
      options.json = false;
    }

    return request(options, function (err, response, body) {
      if (err) {
        err.status = response ? response.statusCode : 400;
        return call(onError, err, callback);
      }
      var error;
      var content_type = response.headers['content-type'];
      var data = (body || '');

      // CouchDB doesn't always return the right content-type for JSON data, so
      // we check for ^{ and }$ (ignoring leading/trailing whitespace)
      if (!options.binary && (options.json || !options.processData) &&
          typeof data !== 'object' &&
          (/json/.test(content_type) ||
           (/^[\s]*\{/.test(data) && /\}[\s]*$/.test(data)))) {
        data = JSON.parse(data);
      }

      if (response.statusCode >= 200 && response.statusCode < 300) {
        call(onSuccess, data, response, callback);
      }
      else {
        if (options.binary) {
          data = JSON.parse(data.toString());
        }
        if (data.reason === 'missing') {
          error = errors.MISSING_DOC;
        } else if (data.reason === 'no_db_file') {
          error = errors.error(errors.DB_MISSING, data.reason);
        } else if (data.error === 'conflict') {
          error = errors.REV_CONFLICT;
        } else {
          error = errors.error(errors.UNKNOWN_ERROR, data.reason, data.error);
        }
        error.status = response.statusCode;
        call(callback, error);
      }
    });
  }
}

module.exports = ajax;

}).call(this,_dereq_("/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js"))
},{"../deps/uuid":12,"./blob.js":7,"./errors":8,"./extend.js":10,"/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js":22,"request":20}],7:[function(_dereq_,module,exports){
(function (global){
"use strict";

//Abstracts constructing a Blob object, so it also works in older
//browsers that don't support the native Blob constructor. (i.e.
//old QtWebKit versions, at least).
function createBlob(parts, properties) {
  parts = parts || [];
  properties = properties || {};
  try {
    return new Blob(parts, properties);
  } catch (e) {
    if (e.name !== "TypeError") {
      throw e;
    }
    var BlobBuilder = global.BlobBuilder || global.MSBlobBuilder || global.MozBlobBuilder || global.WebKitBlobBuilder;
    var builder = new BlobBuilder();
    for (var i = 0; i < parts.length; i += 1) {
      builder.append(parts[i]);
    }
    return builder.getBlob(properties.type);
  }
}

module.exports = createBlob;


}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],8:[function(_dereq_,module,exports){
"use strict";

function PouchError(opts) {
  this.status = opts.status;
  this.name = opts.error;
  this.message = opts.reason;
  this.error = true;
}

PouchError.prototype__proto__ = Error.prototype;

PouchError.prototype.toString = function () {
  return JSON.stringify({
    status: this.status,
    name: this.name,
    message: this.message
  });
};

exports.UNAUTHORIZED = new PouchError({
  status: 401,
  error: 'unauthorized',
  reason: "Name or password is incorrect."
});
exports.MISSING_BULK_DOCS = new PouchError({
  status: 400,
  error: 'bad_request',
  reason: "Missing JSON list of 'docs'"
});
exports.MISSING_DOC = new PouchError({
  status: 404,
  error: 'not_found',
  reason: 'missing'
});
exports.REV_CONFLICT = new PouchError({
  status: 409,
  error: 'conflict',
  reason: 'Document update conflict'
});
exports.INVALID_ID = new PouchError({
  status: 400,
  error: 'invalid_id',
  reason: '_id field must contain a string'
});
exports.MISSING_ID = new PouchError({
  status: 412,
  error: 'missing_id',
  reason: '_id is required for puts'
});
exports.RESERVED_ID = new PouchError({
  status: 400,
  error: 'bad_request',
  reason: 'Only reserved document ids may start with underscore.'
});
exports.NOT_OPEN = new PouchError({
  status: 412,
  error: 'precondition_failed',
  reason: 'Database not open so cannot close'
});
exports.UNKNOWN_ERROR = new PouchError({
  status: 500,
  error: 'unknown_error',
  reason: 'Database encountered an unknown error'
});
exports.BAD_ARG = new PouchError({
  status: 500,
  error: 'badarg',
  reason: 'Some query argument is invalid'
});
exports.INVALID_REQUEST = new PouchError({
  status: 400,
  error: 'invalid_request',
  reason: 'Request was invalid'
});
exports.QUERY_PARSE_ERROR = new PouchError({
  status: 400,
  error: 'query_parse_error',
  reason: 'Some query parameter is invalid'
});
exports.DOC_VALIDATION = new PouchError({
  status: 500,
  error: 'doc_validation',
  reason: 'Bad special document member'
});
exports.BAD_REQUEST = new PouchError({
  status: 400,
  error: 'bad_request',
  reason: 'Something wrong with the request'
});
exports.NOT_AN_OBJECT = new PouchError({
  status: 400,
  error: 'bad_request',
  reason: 'Document must be a JSON object'
});
exports.DB_MISSING = new PouchError({
  status: 404,
  error: 'not_found',
  reason: 'Database not found'
});
exports.IDB_ERROR = new PouchError({
  status: 500,
  error: 'indexed_db_went_bad',
  reason: 'unknown'
});
exports.WSQ_ERROR = new PouchError({
  status: 500,
  error: 'web_sql_went_bad',
  reason: 'unknown'
});
exports.LDB_ERROR = new PouchError({
  status: 500,
  error: 'levelDB_went_went_bad',
  reason: 'unknown'
});
exports.FORBIDDEN = new PouchError({
  status: 403,
  error: 'forbidden',
  reason: 'Forbidden by design doc validate_doc_update function'
});
exports.error = function (error, reason, name) {
  function CustomPouchError(msg) {
    this.message = reason;
    if (name) {
      this.name = name;
    }
  }
  CustomPouchError.prototype = error;
  return new CustomPouchError(reason);
};

},{}],9:[function(_dereq_,module,exports){
// some small shims for es5 just for the features we commonly use
// some of this is copied from https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js
'use strict';

if (!Object.keys) {
  Object.keys = function keys(object) {

    if ((typeof object !== 'object' && typeof object !== 'function') || object === null) {
      throw new TypeError('Object.keys called on a non-object');
    }

    var mykeys = [];
    for (var name in object) {
      if (Object.prototype.hasOwnProperty.call(object, name)) {
        mykeys.push(name);
      }
    }
    return mykeys;
  };
}

if (!Array.isArray) {
  Array.isArray = function isArray(obj) {
    return Object.prototype.toString.call(obj) === '[object Array]';
  };
}

if (!('forEach' in Array.prototype)) {
  Array.prototype.forEach = function (action, that /*opt*/) {
    for (var i = 0, n = this.length; i < n; i++) {
      if (i in this) {
        action.call(that, this[i], i, this);
      }
    }
  };
}

if (!('map' in Array.prototype)) {
  Array.prototype.map = function (mapper, that /*opt*/) {
    var other = new Array(this.length);
    for (var i = 0, n = this.length; i < n; i++) {
      if (i in this) {
        other[i] = mapper.call(that, this[i], i, this);
      }
    }
    return other;
  };
}

},{}],10:[function(_dereq_,module,exports){
"use strict";

// Extends method
// (taken from http://code.jquery.com/jquery-1.9.0.js)
// Populate the class2type map
var class2type = {};

var types = ["Boolean", "Number", "String", "Function", "Array", "Date", "RegExp", "Object", "Error"];
for (var i = 0; i < types.length; i++) {
  var typename = types[i];
  class2type["[object " + typename + "]"] = typename.toLowerCase();
}

var core_toString = class2type.toString;
var core_hasOwn = class2type.hasOwnProperty;

function type(obj) {
  if (obj === null) {
    return String(obj);
  }
  return typeof obj === "object" || typeof obj === "function" ?
    class2type[core_toString.call(obj)] || "object" :
    typeof obj;
}

function isWindow(obj) {
  return obj !== null && obj === obj.window;
}

function isPlainObject(obj) {
  // Must be an Object.
  // Because of IE, we also have to check the presence of the constructor property.
  // Make sure that DOM nodes and window objects don't pass through, as well
  if (!obj || type(obj) !== "object" || obj.nodeType || isWindow(obj)) {
    return false;
  }

  try {
    // Not own constructor property must be Object
    if (obj.constructor &&
      !core_hasOwn.call(obj, "constructor") &&
      !core_hasOwn.call(obj.constructor.prototype, "isPrototypeOf")) {
      return false;
    }
  } catch ( e ) {
    // IE8,9 Will throw exceptions on certain host objects #9897
    return false;
  }

  // Own properties are enumerated firstly, so to speed up,
  // if last one is own, then all properties are own.
  var key;
  for (key in obj) {}

  return key === undefined || core_hasOwn.call(obj, key);
}


function isFunction(obj) {
  return type(obj) === "function";
}

var isArray = Array.isArray || function (obj) {
  return type(obj) === "array";
};

function extend() {
  var options, name, src, copy, copyIsArray, clone,
    target = arguments[0] || {},
    i = 1,
    length = arguments.length,
    deep = false;

  // Handle a deep copy situation
  if (typeof target === "boolean") {
    deep = target;
    target = arguments[1] || {};
    // skip the boolean and the target
    i = 2;
  }

  // Handle case when target is a string or something (possible in deep copy)
  if (typeof target !== "object" && !isFunction(target)) {
    target = {};
  }

  // extend jQuery itself if only one argument is passed
  if (length === i) {
    /* jshint validthis: true */
    target = this;
    --i;
  }

  for (; i < length; i++) {
    // Only deal with non-null/undefined values
    if ((options = arguments[i]) != null) {
      // Extend the base object
      for (name in options) {
        //if (options.hasOwnProperty(name)) {
        if (!(name in Object.prototype)) {

          src = target[name];
          copy = options[name];

          // Prevent never-ending loop
          if (target === copy) {
            continue;
          }

          // Recurse if we're merging plain objects or arrays
          if (deep && copy && (isPlainObject(copy) || (copyIsArray = isArray(copy)))) {
            if (copyIsArray) {
              copyIsArray = false;
              clone = src && isArray(src) ? src : [];

            } else {
              clone = src && isPlainObject(src) ? src : {};
            }

            // Never move original objects, clone them
            target[name] = extend(deep, clone, copy);

          // Don't bring in undefined values
          } else if (copy !== undefined) {
            if (!(isArray(options) && isFunction(copy))) {
              target[name] = copy;
            }
          }
        }
      }
    }
  }

  // Return the modified object
  return target;
}


module.exports = extend;


},{}],11:[function(_dereq_,module,exports){
(function (process){
"use strict";

/**
*
*  MD5 (Message-Digest Algorithm)
*
*  For original source see http://www.webtoolkit.info/
*  Download: 15.02.2009 from http://www.webtoolkit.info/javascript-md5.html
*
*  Licensed under CC-BY 2.0 License
*  (http://creativecommons.org/licenses/by/2.0/uk/)
*
**/
var crypto = _dereq_('crypto');

exports.MD5 = function (string) {
  if (!process.browser) {
    return crypto.createHash('md5').update(string).digest('hex');
  }
  function rotateLeft(lValue, iShiftBits) {
    return (lValue<<iShiftBits) | (lValue>>>(32 - iShiftBits));
  }

  function addUnsigned(lX, lY) {
    var lX4, lY4, lX8, lY8, lResult;
    lX8 = (lX & 0x80000000);
    lY8 = (lY & 0x80000000);
    lX4 = (lX & 0x40000000);
    lY4 = (lY & 0x40000000);
    lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
    if (lX4 & lY4) {
      return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
    }
    if (lX4 | lY4) {
      if (lResult & 0x40000000) {
        return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
      } else {
        return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
      }
    } else {
      return (lResult ^ lX8 ^ lY8);
    }
  }

  function f(x, y, z) { return (x & y) | ((~x) & z); }
  function g(x, y, z) { return (x & z) | (y & (~z)); }
  function h(x, y, z) { return (x ^ y ^ z); }
  function i(x, y, z) { return (y ^ (x | (~z))); }

  function ff(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(f(b, c, d), x), ac));
    return addUnsigned(rotateLeft(a, s), b);
  }

  function gg(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(g(b, c, d), x), ac));
    return addUnsigned(rotateLeft(a, s), b);
  }

  function hh(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(h(b, c, d), x), ac));
    return addUnsigned(rotateLeft(a, s), b);
  }

  function ii(a, b, c, d, x, s, ac) {
    a = addUnsigned(a, addUnsigned(addUnsigned(i(b, c, d), x), ac));
    return addUnsigned(rotateLeft(a, s), b);
  }

  function convertToWordArray(string) {
    var lWordCount;
    var lMessageLength = string.length;
    var lNumberOfWords_temp1 = lMessageLength + 8;
    var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
    var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
    var lWordArray = new Array(lNumberOfWords - 1);
    var lBytePosition = 0;
    var lByteCount = 0;
    while (lByteCount < lMessageLength) {
      lWordCount = (lByteCount - (lByteCount % 4)) / 4;
      lBytePosition = (lByteCount % 4) * 8;
      lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));
      lByteCount++;
    }
    lWordCount = (lByteCount - (lByteCount % 4)) / 4;
    lBytePosition = (lByteCount % 4) * 8;
    lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
    lWordArray[lNumberOfWords - 2] = lMessageLength<<3;
    lWordArray[lNumberOfWords - 1] = lMessageLength>>>29;
    return lWordArray;
  }

  function wordToHex(lValue) {
    var   wordToHexValue = "",   wordToHexValue_temp = "", lByte, lCount;
    for (lCount = 0;lCount <= 3;lCount++) {
      lByte = (lValue>>>(lCount * 8)) & 255;
      wordToHexValue_temp = "0" + lByte.toString(16);
      wordToHexValue = wordToHexValue + wordToHexValue_temp.substr(wordToHexValue_temp.length - 2, 2);
    }
    return   wordToHexValue;
  }

  //**	function Utf8Encode(string) removed. Aready defined in pidcrypt_utils.js

  var x = [];
  var k, AA, BB, CC, DD, a, b, c, d;
  var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
  var S21 = 5, S22 = 9,  S23 = 14, S24 = 20;
  var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
  var S41 = 6, S42 = 10, S43 = 15, S44 = 21;

  //	string = Utf8Encode(string); #function call removed

  x = convertToWordArray(string);

  a = 0x67452301;
  b = 0xEFCDAB89;
  c = 0x98BADCFE;
  d = 0x10325476;

  for (k = 0;k < x.length;k += 16) {
    AA = a;
    BB = b;
    CC = c;
    DD = d;
    a = ff(a, b, c, d, x[k + 0],  S11, 0xD76AA478);
    d = ff(d, a, b, c, x[k + 1],  S12, 0xE8C7B756);
    c = ff(c, d, a, b, x[k + 2],  S13, 0x242070DB);
    b = ff(b, c, d, a, x[k + 3],  S14, 0xC1BDCEEE);
    a = ff(a, b, c, d, x[k + 4],  S11, 0xF57C0FAF);
    d = ff(d, a, b, c, x[k + 5],  S12, 0x4787C62A);
    c = ff(c, d, a, b, x[k + 6],  S13, 0xA8304613);
    b = ff(b, c, d, a, x[k + 7],  S14, 0xFD469501);
    a = ff(a, b, c, d, x[k + 8],  S11, 0x698098D8);
    d = ff(d, a, b, c, x[k + 9],  S12, 0x8B44F7AF);
    c = ff(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
    b = ff(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
    a = ff(a, b, c, d, x[k + 12], S11, 0x6B901122);
    d = ff(d, a, b, c, x[k + 13], S12, 0xFD987193);
    c = ff(c, d, a, b, x[k + 14], S13, 0xA679438E);
    b = ff(b, c, d, a, x[k + 15], S14, 0x49B40821);
    a = gg(a, b, c, d, x[k + 1],  S21, 0xF61E2562);
    d = gg(d, a, b, c, x[k + 6],  S22, 0xC040B340);
    c = gg(c, d, a, b, x[k + 11], S23, 0x265E5A51);
    b = gg(b, c, d, a, x[k + 0],  S24, 0xE9B6C7AA);
    a = gg(a, b, c, d, x[k + 5],  S21, 0xD62F105D);
    d = gg(d, a, b, c, x[k + 10], S22, 0x2441453);
    c = gg(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
    b = gg(b, c, d, a, x[k + 4],  S24, 0xE7D3FBC8);
    a = gg(a, b, c, d, x[k + 9],  S21, 0x21E1CDE6);
    d = gg(d, a, b, c, x[k + 14], S22, 0xC33707D6);
    c = gg(c, d, a, b, x[k + 3],  S23, 0xF4D50D87);
    b = gg(b, c, d, a, x[k + 8],  S24, 0x455A14ED);
    a = gg(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
    d = gg(d, a, b, c, x[k + 2],  S22, 0xFCEFA3F8);
    c = gg(c, d, a, b, x[k + 7],  S23, 0x676F02D9);
    b = gg(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
    a = hh(a, b, c, d, x[k + 5],  S31, 0xFFFA3942);
    d = hh(d, a, b, c, x[k + 8],  S32, 0x8771F681);
    c = hh(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
    b = hh(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
    a = hh(a, b, c, d, x[k + 1],  S31, 0xA4BEEA44);
    d = hh(d, a, b, c, x[k + 4],  S32, 0x4BDECFA9);
    c = hh(c, d, a, b, x[k + 7],  S33, 0xF6BB4B60);
    b = hh(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
    a = hh(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
    d = hh(d, a, b, c, x[k + 0],  S32, 0xEAA127FA);
    c = hh(c, d, a, b, x[k + 3],  S33, 0xD4EF3085);
    b = hh(b, c, d, a, x[k + 6],  S34, 0x4881D05);
    a = hh(a, b, c, d, x[k + 9],  S31, 0xD9D4D039);
    d = hh(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
    c = hh(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
    b = hh(b, c, d, a, x[k + 2],  S34, 0xC4AC5665);
    a = ii(a, b, c, d, x[k + 0],  S41, 0xF4292244);
    d = ii(d, a, b, c, x[k + 7],  S42, 0x432AFF97);
    c = ii(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
    b = ii(b, c, d, a, x[k + 5],  S44, 0xFC93A039);
    a = ii(a, b, c, d, x[k + 12], S41, 0x655B59C3);
    d = ii(d, a, b, c, x[k + 3],  S42, 0x8F0CCC92);
    c = ii(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
    b = ii(b, c, d, a, x[k + 1],  S44, 0x85845DD1);
    a = ii(a, b, c, d, x[k + 8],  S41, 0x6FA87E4F);
    d = ii(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
    c = ii(c, d, a, b, x[k + 6],  S43, 0xA3014314);
    b = ii(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
    a = ii(a, b, c, d, x[k + 4],  S41, 0xF7537E82);
    d = ii(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
    c = ii(c, d, a, b, x[k + 2],  S43, 0x2AD7D2BB);
    b = ii(b, c, d, a, x[k + 9],  S44, 0xEB86D391);
    a = addUnsigned(a, AA);
    b = addUnsigned(b, BB);
    c = addUnsigned(c, CC);
    d = addUnsigned(d, DD);
  }
  var temp = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
  return temp.toLowerCase();
};
}).call(this,_dereq_("/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js"))
},{"/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js":22,"crypto":20}],12:[function(_dereq_,module,exports){
"use strict";

// BEGIN Math.uuid.js

/*!
Math.uuid.js (v1.4)
http://www.broofa.com
mailto:robert@broofa.com

Copyright (c) 2010 Robert Kieffer
Dual licensed under the MIT and GPL licenses.
*/

/*
 * Generate a random uuid.
 *
 * USAGE: Math.uuid(length, radix)
 *   length - the desired number of characters
 *   radix  - the number of allowable values for each character.
 *
 * EXAMPLES:
 *   // No arguments  - returns RFC4122, version 4 ID
 *   >>> Math.uuid()
 *   "92329D39-6F5C-4520-ABFC-AAB64544E172"
 *
 *   // One argument - returns ID of the specified length
 *   >>> Math.uuid(15)     // 15 character ID (default base=62)
 *   "VcydxgltxrVZSTV"
 *
 *   // Two arguments - returns ID of the specified length, and radix. (Radix must be <= 62)
 *   >>> Math.uuid(8, 2)  // 8 character ID (base=2)
 *   "01001010"
 *   >>> Math.uuid(8, 10) // 8 character ID (base=10)
 *   "47473046"
 *   >>> Math.uuid(8, 16) // 8 character ID (base=16)
 *   "098F4D35"
 */


function uuid(len, radix) {
  var chars = uuid.CHARS;
  var uuidInner = [];
  var i;

  radix = radix || chars.length;

  if (len) {
    // Compact form
    for (i = 0; i < len; i++) {
      uuidInner[i] = chars[0 | Math.random() * radix];
    }
  } else {
    // rfc4122, version 4 form
    var r;

    // rfc4122 requires these characters
    uuidInner[8] = uuidInner[13] = uuidInner[18] = uuidInner[23] = '-';
    uuidInner[14] = '4';

    // Fill in random data.  At i==19 set the high bits of clock sequence as
    // per rfc4122, sec. 4.1.5
    for (i = 0; i < 36; i++) {
      if (!uuidInner[i]) {
        r = 0 | Math.random() * 16;
        uuidInner[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r];
      }
    }
  }

  return uuidInner.join('');
}

uuid.CHARS = (
  '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ' +
  'abcdefghijklmnopqrstuvwxyz'
).split('');

module.exports = uuid;


},{}],13:[function(_dereq_,module,exports){
(function (process){
"use strict";

_dereq_('./deps/es5_shims');

var PouchDBVersion200 = _dereq_('./setup');

module.exports = PouchDBVersion200;

PouchDBVersion200.ajax = _dereq_('./deps/ajax');
PouchDBVersion200.extend = _dereq_('./deps/extend');
PouchDBVersion200.utils = _dereq_('./utils');
PouchDBVersion200.Errors = _dereq_('./deps/errors');
var replicate = _dereq_('./replicate');
PouchDBVersion200.replicate = replicate.replicate;
PouchDBVersion200.sync = replicate.sync;
PouchDBVersion200.version = _dereq_('./version');
var httpAdapter = _dereq_('./adapters/http');
PouchDBVersion200.adapter('http', httpAdapter);
PouchDBVersion200.adapter('https', httpAdapter);

PouchDBVersion200.adapter('idb', _dereq_('./adapters/idb'));
PouchDBVersion200.adapter('websql', _dereq_('./adapters/websql'));
PouchDBVersion200.plugin(_dereq_('pouchdb-mapreduce'));

if (!process.browser) {
  var ldbAdapter = _dereq_('./adapters/leveldb');
  PouchDBVersion200.adapter('ldb', ldbAdapter);
  PouchDBVersion200.adapter('leveldb', ldbAdapter);
}

}).call(this,_dereq_("/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js"))
},{"./adapters/http":2,"./adapters/idb":3,"./adapters/leveldb":20,"./adapters/websql":4,"./deps/ajax":6,"./deps/errors":8,"./deps/es5_shims":9,"./deps/extend":10,"./replicate":15,"./setup":16,"./utils":18,"./version":19,"/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js":22,"pouchdb-mapreduce":35}],14:[function(_dereq_,module,exports){
'use strict';

var extend = _dereq_('./deps/extend');


// for a better overview of what this is doing, read:
// https://github.com/apache/couchdb/blob/master/src/couchdb/couch_key_tree.erl
//
// But for a quick intro, CouchDB uses a revision tree to store a documents
// history, A -> B -> C, when a document has conflicts, that is a branch in the
// tree, A -> (B1 | B2 -> C), We store these as a nested array in the format
//
// KeyTree = [Path ... ]
// Path = {pos: position_from_root, ids: Tree}
// Tree = [Key, Opts, [Tree, ...]], in particular single node: [Key, []]

// Turn a path as a flat array into a tree with a single branch
function pathToTree(path) {
  var doc = path.shift();
  var root = [doc.id, doc.opts, []];
  var leaf = root;
  var nleaf;

  while (path.length) {
    doc = path.shift();
    nleaf = [doc.id, doc.opts, []];
    leaf[2].push(nleaf);
    leaf = nleaf;
  }
  return root;
}

// Merge two trees together
// The roots of tree1 and tree2 must be the same revision
function mergeTree(in_tree1, in_tree2) {
  var queue = [{tree1: in_tree1, tree2: in_tree2}];
  var conflicts = false;
  while (queue.length > 0) {
    var item = queue.pop();
    var tree1 = item.tree1;
    var tree2 = item.tree2;

    if (tree1[1].status || tree2[1].status) {
      tree1[1].status = (tree1[1].status ===  'available' ||
                         tree2[1].status === 'available') ? 'available' : 'missing';
    }

    for (var i = 0; i < tree2[2].length; i++) {
      if (!tree1[2][0]) {
        conflicts = 'new_leaf';
        tree1[2][0] = tree2[2][i];
        continue;
      }

      var merged = false;
      for (var j = 0; j < tree1[2].length; j++) {
        if (tree1[2][j][0] === tree2[2][i][0]) {
          queue.push({tree1: tree1[2][j], tree2: tree2[2][i]});
          merged = true;
        }
      }
      if (!merged) {
        conflicts = 'new_branch';
        tree1[2].push(tree2[2][i]);
        tree1[2].sort();
      }
    }
  }
  return {conflicts: conflicts, tree: in_tree1};
}

function doMerge(tree, path, dontExpand) {
  var restree = [];
  var conflicts = false;
  var merged = false;
  var res;

  if (!tree.length) {
    return {tree: [path], conflicts: 'new_leaf'};
  }

  tree.forEach(function (branch) {
    if (branch.pos === path.pos && branch.ids[0] === path.ids[0]) {
      // Paths start at the same position and have the same root, so they need
      // merged
      res = mergeTree(branch.ids, path.ids);
      restree.push({pos: branch.pos, ids: res.tree});
      conflicts = conflicts || res.conflicts;
      merged = true;
    } else if (dontExpand !== true) {
      // The paths start at a different position, take the earliest path and
      // traverse up until it as at the same point from root as the path we want to
      // merge.  If the keys match we return the longer path with the other merged
      // After stemming we dont want to expand the trees

      var t1 = branch.pos < path.pos ? branch : path;
      var t2 = branch.pos < path.pos ? path : branch;
      var diff = t2.pos - t1.pos;

      var candidateParents = [];

      var trees = [];
      trees.push({ids: t1.ids, diff: diff, parent: null, parentIdx: null});
      while (trees.length > 0) {
        var item = trees.pop();
        if (item.diff === 0) {
          if (item.ids[0] === t2.ids[0]) {
            candidateParents.push(item);
          }
          continue;
        }
        if (!item.ids) {
          continue;
        }
        /*jshint loopfunc:true */
        item.ids[2].forEach(function (el, idx) {
          trees.push({ids: el, diff: item.diff - 1, parent: item.ids, parentIdx: idx});
        });
      }

      var el = candidateParents[0];

      if (!el) {
        restree.push(branch);
      } else {
        res = mergeTree(el.ids, t2.ids);
        el.parent[2][el.parentIdx] = res.tree;
        restree.push({pos: t1.pos, ids: t1.ids});
        conflicts = conflicts || res.conflicts;
        merged = true;
      }
    } else {
      restree.push(branch);
    }
  });

  // We didnt find
  if (!merged) {
    restree.push(path);
  }

  restree.sort(function (a, b) {
    return a.pos - b.pos;
  });

  return {
    tree: restree,
    conflicts: conflicts || 'internal_node'
  };
}

// To ensure we dont grow the revision tree infinitely, we stem old revisions
function stem(tree, depth) {
  // First we break out the tree into a complete list of root to leaf paths,
  // we cut off the start of the path and generate a new set of flat trees
  var stemmedPaths = PouchMerge.rootToLeaf(tree).map(function (path) {
    var stemmed = path.ids.slice(-depth);
    return {
      pos: path.pos + (path.ids.length - stemmed.length),
      ids: pathToTree(stemmed)
    };
  });
  // Then we remerge all those flat trees together, ensuring that we dont
  // connect trees that would go beyond the depth limit
  return stemmedPaths.reduce(function (prev, current, i, arr) {
    return doMerge(prev, current, true).tree;
  }, [stemmedPaths.shift()]);
}

var PouchMerge = {};

PouchMerge.merge = function (tree, path, depth) {
  // Ugh, nicer way to not modify arguments in place?
  tree = extend(true, [], tree);
  path = extend(true, {}, path);
  var newTree = doMerge(tree, path);
  return {
    tree: stem(newTree.tree, depth),
    conflicts: newTree.conflicts
  };
};

// We fetch all leafs of the revision tree, and sort them based on tree length
// and whether they were deleted, undeleted documents with the longest revision
// tree (most edits) win
// The final sort algorithm is slightly documented in a sidebar here:
// http://guide.couchdb.org/draft/conflicts.html
PouchMerge.winningRev = function (metadata) {
  var leafs = [];
  PouchMerge.traverseRevTree(metadata.rev_tree,
                              function (isLeaf, pos, id, something, opts) {
    if (isLeaf) {
      leafs.push({pos: pos, id: id, deleted: !!opts.deleted});
    }
  });
  leafs.sort(function (a, b) {
    if (a.deleted !== b.deleted) {
      return a.deleted > b.deleted ? 1 : -1;
    }
    if (a.pos !== b.pos) {
      return b.pos - a.pos;
    }
    return a.id < b.id ? 1 : -1;
  });

  return leafs[0].pos + '-' + leafs[0].id;
};

// Pretty much all below can be combined into a higher order function to
// traverse revisions
// The return value from the callback will be passed as context to all
// children of that node
PouchMerge.traverseRevTree = function (revs, callback) {
  var toVisit = [];

  revs.forEach(function (tree) {
    toVisit.push({pos: tree.pos, ids: tree.ids});
  });
  while (toVisit.length > 0) {
    var node = toVisit.pop();
    var pos = node.pos;
    var tree = node.ids;
    var newCtx = callback(tree[2].length === 0, pos, tree[0], node.ctx, tree[1]);
    /*jshint loopfunc: true */
    tree[2].forEach(function (branch) {
      toVisit.push({pos: pos + 1, ids: branch, ctx: newCtx});
    });
  }
};

PouchMerge.collectLeaves = function (revs) {
  var leaves = [];
  PouchMerge.traverseRevTree(revs, function (isLeaf, pos, id, acc, opts) {
    if (isLeaf) {
      leaves.unshift({rev: pos + "-" + id, pos: pos, opts: opts});
    }
  });
  leaves.sort(function (a, b) {
    return b.pos - a.pos;
  });
  leaves.map(function (leaf) { delete leaf.pos; });
  return leaves;
};

// returns revs of all conflicts that is leaves such that
// 1. are not deleted and
// 2. are different than winning revision
PouchMerge.collectConflicts = function (metadata) {
  var win = PouchMerge.winningRev(metadata);
  var leaves = PouchMerge.collectLeaves(metadata.rev_tree);
  var conflicts = [];
  leaves.forEach(function (leaf) {
    if (leaf.rev !== win && !leaf.opts.deleted) {
      conflicts.push(leaf.rev);
    }
  });
  return conflicts;
};

PouchMerge.rootToLeaf = function (tree) {
  var paths = [];
  PouchMerge.traverseRevTree(tree, function (isLeaf, pos, id, history, opts) {
    history = history ? history.slice(0) : [];
    history.push({id: id, opts: opts});
    if (isLeaf) {
      var rootPos = pos + 1 - history.length;
      paths.unshift({pos: rootPos, ids: history});
    }
    return history;
  });
  return paths;
};


module.exports = PouchMerge;

},{"./deps/extend":10}],15:[function(_dereq_,module,exports){
'use strict';

var PouchUtils = _dereq_('./utils');
var Pouch = _dereq_('./index');

// We create a basic promise so the caller can cancel the replication possibly
// before we have actually started listening to changes etc
function Promise() {
  var that = this;
  this.cancelled = false;
  this.cancel = function () {
    that.cancelled = true;
  };
}


// A batch of changes to be processed as a unit
function Batch() {
  this.seq = 0;
  this.state = 'start';
  this.changes = [];
  this.docs = [];
}


// TODO: check CouchDB's replication id generation
// Generate a unique id particular to this replication
function genReplicationId(src, target, opts, callback) {
  var filterFun = opts.filter ? opts.filter.toString() : '';
  src.id(function (err, src_id) {
    target.id(function (err, target_id) {
      var queryData = src_id + target_id + filterFun +
        JSON.stringify(opts.query_params);
      callback('_local/' + PouchUtils.Crypto.MD5(queryData));
    });
  });
}


// A checkpoint lets us restart replications from when they were last cancelled
function fetchCheckpoint(src, target, id, callback) {
  target.get(id, function (err, targetDoc) {
    if (err && err.status === 404) {
      callback(null, 0);
    } else if (err) {
      callback(err);
    } else {
      src.get(id, function (err, sourceDoc) {
        if (err && err.status === 404 ||
            (!err && (targetDoc.last_seq !== sourceDoc.last_seq))) {
          callback(null, 0);
        } else if (err) {
          callback(err);
        } else {
          callback(null, sourceDoc.last_seq);
        }
      });
    }
  });
}


function writeCheckpoint(src, target, id, checkpoint, callback) {
  function updateCheckpoint(db, callback) {
    db.get(id, function (err, doc) {
      if (err && err.status === 404) {
        doc = {_id: id};
      } else if (err) {
        return callback(err);
      }
      doc.last_seq = checkpoint;
      db.put(doc, callback);
    });
  }
  updateCheckpoint(target, function (err, doc) {
    updateCheckpoint(src, function (err, doc) {
      callback();
    });
  });
}


function replicate(repId, src, target, opts, promise) {
  var batches = [];     // queue of batches of changes to be processed
  var pendingBatch = new Batch();
  var changesCompleted = false;
  var completeCalled = false;
  var last_seq = 0;
  var continuous = opts.continuous || false;
  var batch_size = opts.batch_size || 1;
  var doc_ids = opts.doc_ids;
  var result = {
    ok: true,
    start_time: new Date(),
    docs_read: 0,
    docs_written: 0,
    errors: []
  };


  function writeDocs() {
    if (batches[0].docs.length === 0) {
      // This should never happen:
      // batch processing continues past onRevsDiff only if there are diffs
      // and replication is aborted if a get fails.
      // TODO: throw or log the error
      return finishBatch();
    }

    var docs = batches[0].docs;
    target.bulkDocs({docs: docs}, {new_edits: false}, function (err, res) {
      if (err) {
        return abortReplication('target.bulkDocs completed with error', err);
      }

      result.docs_written += docs.length;
      finishBatch();
    });
  }


  function onGet(err, docs) {
    if (promise.cancelled) {
      return replicationCancelled();
    }

    if (err) {
      return abortReplication('src.get completed with error', err);
    }

    Object.keys(docs).forEach(function (revpos) {
      var doc = docs[revpos].ok;

      if (doc) {
        result.docs_read++;
        batches[0].pendingRevs++;
        batches[0].docs.push(doc);
      }
    });

    fetchRev();
  }


  function fetchRev() {
    var diffs = batches[0].diffs;

    if (Object.keys(diffs).length === 0) {
      writeDocs();
      return;
    }

    var id = Object.keys(diffs)[0];
    var revs = diffs[id].missing;
    delete diffs[id];

    src.get(id, {revs: true, open_revs: revs, attachments: true}, onGet);
  }


  function abortReplication(reason, err) {
    if (completeCalled) {
      return;
    }
    result.ok = false;
    result.status = 'aborted';
    result.errors.push(err);
    result.end_time = new Date();
    result.last_seq = last_seq;
    promise.cancel();
    batches = [];
    pendingBatch = new Batch();
    var error = {
      status: 500,
      error: 'Replication aborted',
      reason: reason,
      details: err
    };
    completeCalled = true;
    PouchUtils.call(opts.complete, error, result);
  }


  function finishBatch() {
    writeCheckpoint(src, target, repId, batches[0].seq, function (err, res) {
      if (err) {
        return abortReplication('writeCheckpoint completed with error', err);
      }
      last_seq = batches[0].seq;
      result.last_seq = last_seq;
      PouchUtils.call(opts.onChange, null, result);
      batches.shift();
      startNextBatch();
    });
  }

  function onRevsDiff(err, diffs) {
    if (promise.cancelled) {
      return replicationCancelled();
    }

    if (err) {
      return abortReplication('target.revsDiff completed with error', err);
    }

    if (Object.keys(diffs).length === 0) {
      finishBatch();
      return;
    }

    batches[0].diffs = diffs;
    batches[0].pendingRevs = 0;
    fetchRev();
  }


  function fetchRevsDiff() {
    var diff = {};
    batches[0].changes.forEach(function (change) {
      diff[change.id] = change.changes.map(function (x) { return x.rev; });
    });

    target.revsDiff(diff, onRevsDiff);
  }


  function startNextBatch() {
    if (promise.cancelled) {
      return replicationCancelled();
    }

    if (batches.length === 0) {
      processPendingBatch();
      return;
    }

    if (batches[0].state === 'start') {
      batches[0].state = 'processing';
      fetchRevsDiff();
    }
  }


  function processPendingBatch() {
    if (pendingBatch.changes.length === 0) {
      if (changesCompleted && batches.length === 0) {
        replicationComplete();
      }
      return;
    }

    if (changesCompleted || pendingBatch.changes.length >= batch_size) {
      batches.push(pendingBatch);
      pendingBatch = new Batch();
      startNextBatch();
    }
  }


  function replicationCancelled() {
    result.status = 'cancelled';
    replicationComplete();
  }

  
  function replicationComplete() {
    if (completeCalled) {
      return;
    }
    result.status = result.status || 'complete';
    result.end_time = new Date();
    result.last_seq = last_seq;
    completeCalled = true;
    return PouchUtils.call(opts.complete, null, result);
  }


  function onChange(change) {
    if (promise.cancelled) {
      return replicationCancelled();
    }

    if (completeCalled) {
      // This should never happen
      // The complete callback has already been called
      // How to raise an exception in PouchDBVersion200?
      return;
    }

    pendingBatch.seq = change.seq;
    pendingBatch.changes.push(change);

    processPendingBatch();
  }


  function complete(err, result) {
    changesCompleted = true;
    if (promise.cancelled) {
      return replicationCancelled();
    }

    if (err) {
      return abortReplication('src.changes completed with error', err);
    }

    processPendingBatch();
  }


  function getChanges() {
    fetchCheckpoint(src, target, repId, function (err, checkpoint) {
      if (err) {
        return abortReplication('fetchCheckpoint completed with error', err);
      }

      last_seq = checkpoint;

      // Was the replication cancelled by the caller before it had a chance
      // to start. Shouldnt we be calling complete?
      if (promise.cancelled) {
        return replicationCancelled();
      }

      // Call changes on the source database, with callbacks to onChange for
      // each change and complete when done.
      var repOpts = {
        continuous: continuous,
        since: last_seq,
        style: 'all_docs',
        onChange: onChange,
        complete: complete,
        doc_ids: doc_ids
      };

      if (opts.filter) {
        repOpts.filter = opts.filter;
      }

      if (opts.query_params) {
        repOpts.query_params = opts.query_params;
      }

      var changes = src.changes(repOpts);

      if (opts.continuous) {
        var cancel = promise.cancel;
        promise.cancel = function () {
          cancel();
          changes.cancel();
        };
      }
    });
  }

  // If opts.since is given, set the checkpoint to opts.since
  if (typeof opts.since === 'undefined') {
    getChanges();
  } else {
    writeCheckpoint(src, target, repId, opts.since, function (err, res) {
      if (err) {
        return abortReplication('writeCheckpoint completed with error', err);
      }
      last_seq = opts.since;
      getChanges();
    });
  }
}

function toPouch(db, callback) {
  if (typeof db === 'string') {
    return new Pouch(db, callback);
  }
  callback(null, db);
}

function replicateWrapper(src, target, opts, callback) {
  if (opts instanceof Function) {
    callback = opts;
    opts = {};
  }
  if (opts === undefined) {
    opts = {};
  }
  if (!opts.complete) {
    opts.complete = callback;
  }
  var replicateRet = new Promise();
  toPouch(src, function (err, src) {
    if (err) {
      return callback(err);
    }
    toPouch(target, function (err, target) {
      if (err) {
        return callback(err);
      }
      if (opts.server) {
        if (typeof src.replicateOnServer !== 'function') {
          return callback({
            error: 'Server replication not supported for ' + src.type() +
              'adapter'
          });
        }
        if (src.type() !== target.type()) {
          return callback({
            error: 'Server replication for different adapter types (' +
              src.type() + ' and ' + target.type() + ') is not supported'
          });
        }
        src.replicateOnServer(target, opts, replicateRet);
      } else {
        genReplicationId(src, target, opts, function (repId) {
          replicate(repId, src, target, opts, replicateRet);
        });
      }
    });
  });
  return replicateRet;
}

function sync(db1, db2, opts, callback) {
  var push_promise;
  var pull_promise;

  function complete(callback) {
    return function (err, res) {
      if (err) {
        // cancel both replications if either experiences problems
        cancel();
      }
      callback(err, res);
    };
  }

  function onChange(src, callback) {
    callback = callback || function () {};
    return function (change) {
      return {
        source: src,
        change: callback(change)
      };
    };
  }

  function makeOpts(src, opts) {
    opts = PouchUtils.extend(true, {}, opts);
    opts.complete = complete(opts.complete);
    opts.onChange = onChange(src, opts.onChange);
    return opts;
  }

  function push() {
    push_promise = replicateWrapper(db1, db2, makeOpts(db1, opts), callback);
    return push_promise;
  }

  function pull() {
    pull_promise = replicateWrapper(db2, db1, makeOpts(db2, opts), callback);
    return pull_promise;
  }

  function cancel() {
    if (push_promise) {
      push_promise.cancel();
    }
    if (pull_promise) {
      pull_promise.cancel();
    }
  }

  return {
    push: push(),
    pull: pull(),
    cancel: cancel
  };
}

exports.replicate = replicateWrapper;
exports.sync = sync;

},{"./index":13,"./utils":18}],16:[function(_dereq_,module,exports){
"use strict";

var PouchDBVersion200 = _dereq_("./constructor");
var utils = _dereq_('./utils');
var EventEmitter = _dereq_('events').EventEmitter;
PouchDBVersion200.adapters = {};

PouchDBVersion200.prefix = '_pouch_';

var eventEmitter = new EventEmitter();

var eventEmitterMethods = [
  'on',
  'addListener',
  'emit',
  'listeners',
  'once',
  'removeAllListeners',
  'removeListener',
  'setMaxListeners'
];

eventEmitterMethods.forEach(function (method) {
  PouchDBVersion200[method] = eventEmitter[method].bind(eventEmitter);
});
PouchDBVersion200.setMaxListeners(0);
PouchDBVersion200.parseAdapter = function (name) {
  var match = name.match(/([a-z\-]*):\/\/(.*)/);
  var adapter;
  if (match) {
    // the http adapter expects the fully qualified name
    name = /http(s?)/.test(match[1]) ? match[1] + '://' + match[2] : match[2];
    adapter = match[1];
    if (!PouchDBVersion200.adapters[adapter].valid()) {
      throw 'Invalid adapter';
    }
    return {name: name, adapter: match[1]};
  }

  var preferredAdapters = ['idb', 'leveldb', 'websql'];
  for (var i = 0; i < preferredAdapters.length; ++i) {
    if (preferredAdapters[i] in PouchDBVersion200.adapters) {
      adapter = PouchDBVersion200.adapters[preferredAdapters[i]];
      var use_prefix = 'use_prefix' in adapter ? adapter.use_prefix : true;

      return {
        name: use_prefix ? PouchDBVersion200.prefix + name : name,
        adapter: preferredAdapters[i]
      };
    }
  }

  throw 'No valid adapter found';
};

PouchDBVersion200.destroy = utils.toPromise(function (name, opts, callback) {
  if (typeof opts === 'function' || typeof opts === 'undefined') {
    callback = opts;
    opts = {};
  }

  if (typeof name === 'object') {
    opts = name;
    name = undefined;
  }

  var backend = PouchDBVersion200.parseAdapter(opts.name || name);
  var dbName = backend.name;

  // call destroy method of the particular adaptor
  PouchDBVersion200.adapters[backend.adapter].destroy(dbName, opts, function (err, resp) {
    if (err) {
      callback(err);
    } else {
      PouchDBVersion200.emit('destroyed', dbName);
      //so we don't have to sift through all dbnames
      PouchDBVersion200.emit(dbName, 'destroyed');
      callback(null, resp);
    }
  });
});
PouchDBVersion200.allDbs = utils.toPromise(function (callback) {
  var err = new Error('allDbs method removed');
  err.stats = '400';
  callback(err);
});
PouchDBVersion200.adapter = function (id, obj) {
  if (obj.valid()) {
    PouchDBVersion200.adapters[id] = obj;
  }
};

PouchDBVersion200.plugin = function (obj) {
  Object.keys(obj).forEach(function (id) {
    PouchDBVersion200.prototype[id] = obj[id];
  });
};

module.exports = PouchDBVersion200;

},{"./constructor":5,"./utils":18,"events":21}],17:[function(_dereq_,module,exports){
'use strict';

module.exports = TaskQueue;

function TaskQueue() {
  this.isReady = false;
  this.failed = false;
  this.queue = [];
}

TaskQueue.prototype.execute = function () {
  var d, func;
  if (this.failed) {
    while ((d = this.queue.shift())) {
      func = d.parameters[d.parameters.length - 1];
      if (typeof func === 'function') {
        func(this.failed);
      } else if (d.name === 'changes' && typeof func.complete === 'function') {
        func.complete(this.failed);
      }
    }
  } else if (this.isReady) {
    while ((d = this.queue.shift())) {
      d.task = this.db[d.name].apply(this.db, d.parameters);
    }
  }
};
TaskQueue.prototype.fail = function (err) {
  this.failed = err;
  this.execute();
};

TaskQueue.prototype.ready = function (db) {
  if (this.failed) {
    return false;
  } else if (arguments.length === 0) {
    return this.isReady;
  }
  this.isReady = db ? true: false;
  this.db = db;
  this.execute();
};

TaskQueue.prototype.addTask = function (name, parameters) {
  var task = { name: name, parameters: parameters };
  this.queue.push(task);
  if (this.failed) {
    this.execute();
  }
  return task;
};
},{}],18:[function(_dereq_,module,exports){
(function (process,global){
/*jshint strict: false */
/*global chrome */

var merge = _dereq_('./merge');
exports.extend = _dereq_('./deps/extend');
exports.ajax = _dereq_('./deps/ajax');
exports.createBlob = _dereq_('./deps/blob');
var uuid = _dereq_('./deps/uuid');
exports.Crypto = _dereq_('./deps/md5.js');
var buffer = _dereq_('./deps/buffer');
var errors = _dereq_('./deps/errors');
var Promise = typeof global.Promise === 'function' ? global.Promise : _dereq_('bluebird');

// List of top level reserved words for doc
var reservedWords = [
  '_id',
  '_rev',
  '_attachments',
  '_deleted',
  '_revisions',
  '_revs_info',
  '_conflicts',
  '_deleted_conflicts',
  '_local_seq',
  '_rev_tree'
];
exports.inherits = _dereq_('inherits');
exports.uuids = function (count, options) {

  if (typeof(options) !== 'object') {
    options = {};
  }

  var length = options.length;
  var radix = options.radix;
  var uuids = [];

  while (uuids.push(uuid(length, radix)) < count) { }

  return uuids;
};

// Give back one UUID
exports.uuid = function (options) {
  return exports.uuids(1, options)[0];
};
// Determine id an ID is valid
//   - invalid IDs begin with an underescore that does not begin '_design' or '_local'
//   - any other string value is a valid id
// Returns the specific error object for each case
exports.invalidIdError = function (id) {
  if (!id) {
    return errors.MISSING_ID;
  } else if (typeof id !== 'string') {
    return errors.INVALID_ID;
  } else if (/^_/.test(id) && !(/^_(design|local)/).test(id)) {
    return errors.RESERVED_ID;
  }
};

function isChromeApp() {
  return (typeof chrome !== "undefined" &&
          typeof chrome.storage !== "undefined" &&
          typeof chrome.storage.local !== "undefined");
}

// Pretty dumb name for a function, just wraps callback calls so we dont
// to if (callback) callback() everywhere
exports.call = function (fun) {
  if (typeof fun === typeof Function) {
    var args = Array.prototype.slice.call(arguments, 1);
    fun.apply(this, args);
  }
};

exports.isLocalId = function (id) {
  return (/^_local/).test(id);
};

// check if a specific revision of a doc has been deleted
//  - metadata: the metadata object from the doc store
//  - rev: (optional) the revision to check. defaults to winning revision
exports.isDeleted = function (metadata, rev) {
  if (!rev) {
    rev = merge.winningRev(metadata);
  }
  if (rev.indexOf('-') >= 0) {
    rev = rev.split('-')[1];
  }
  var deleted = false;
  merge.traverseRevTree(metadata.rev_tree, function (isLeaf, pos, id, acc, opts) {
    if (id === rev) {
      deleted = !!opts.deleted;
    }
  });

  return deleted;
};

exports.filterChange = function (opts) {
  return function (change) {
    var req = {};
    var hasFilter = opts.filter && typeof opts.filter === 'function';

    req.query = opts.query_params;
    if (opts.filter && hasFilter && !opts.filter.call(this, change.doc, req)) {
      return false;
    }
    if (opts.doc_ids && opts.doc_ids.indexOf(change.id) === -1) {
      return false;
    }
    if (!opts.include_docs) {
      delete change.doc;
    } else {
      for (var att in change.doc._attachments) {
        if (change.doc._attachments.hasOwnProperty(att)) {
          change.doc._attachments[att].stub = true;
        }
      }
    }
    return true;
  };
};

exports.processChanges = function (opts, changes, last_seq) {
  // TODO: we should try to filter and limit as soon as possible
  changes = changes.filter(exports.filterChange(opts));
  if (opts.limit) {
    if (opts.limit < changes.length) {
      changes.length = opts.limit;
    }
  }
  changes.forEach(function (change) {
    exports.call(opts.onChange, change);
  });
  if (!opts.continuous) {
    exports.call(opts.complete, null, {results: changes, last_seq: last_seq});
  }
};

// Preprocess documents, parse their revisions, assign an id and a
// revision for new writes that are missing them, etc
exports.parseDoc = function (doc, newEdits) {
  var error = null;
  var nRevNum;
  var newRevId;
  var revInfo;
  var opts = {status: 'available'};
  if (doc._deleted) {
    opts.deleted = true;
  }

  if (newEdits) {
    if (!doc._id) {
      doc._id = exports.uuid();
    }
    newRevId = exports.uuid({length: 32, radix: 16}).toLowerCase();
    if (doc._rev) {
      revInfo = /^(\d+)-(.+)$/.exec(doc._rev);
      if (!revInfo) {
        throw "invalid value for property '_rev'";
      }
      doc._rev_tree = [{
        pos: parseInt(revInfo[1], 10),
        ids: [revInfo[2], {status: 'missing'}, [[newRevId, opts, []]]]
      }];
      nRevNum = parseInt(revInfo[1], 10) + 1;
    } else {
      doc._rev_tree = [{
        pos: 1,
        ids : [newRevId, opts, []]
      }];
      nRevNum = 1;
    }
  } else {
    if (doc._revisions) {
      doc._rev_tree = [{
        pos: doc._revisions.start - doc._revisions.ids.length + 1,
        ids: doc._revisions.ids.reduce(function (acc, x) {
          if (acc === null) {
            return [x, opts, []];
          } else {
            return [x, {status: 'missing'}, [acc]];
          }
        }, null)
      }];
      nRevNum = doc._revisions.start;
      newRevId = doc._revisions.ids[0];
    }
    if (!doc._rev_tree) {
      revInfo = /^(\d+)-(.+)$/.exec(doc._rev);
      if (!revInfo) {
        return errors.BAD_ARG;
      }
      nRevNum = parseInt(revInfo[1], 10);
      newRevId = revInfo[2];
      doc._rev_tree = [{
        pos: parseInt(revInfo[1], 10),
        ids: [revInfo[2], opts, []]
      }];
    }
  }

  error = exports.invalidIdError(doc._id);

  for (var key in doc) {
    if (doc.hasOwnProperty(key) && key[0] === '_' && reservedWords.indexOf(key) === -1) {
      error = exports.extend({}, errors.DOC_VALIDATION);
      error.reason += ': ' + key;
    }
  }

  doc._id = decodeURIComponent(doc._id);
  doc._rev = [nRevNum, newRevId].join('-');

  if (error) {
    return error;
  }

  return Object.keys(doc).reduce(function (acc, key) {
    if (/^_/.test(key) && key !== '_attachments') {
      acc.metadata[key.slice(1)] = doc[key];
    } else {
      acc.data[key] = doc[key];
    }
    return acc;
  }, {metadata : {}, data : {}});
};

exports.isCordova = function () {
  return (typeof cordova !== "undefined" ||
          typeof PhoneGap !== "undefined" ||
          typeof phonegap !== "undefined");
};

exports.Changes = function () {

  var api = {};
  var listeners = {};

  if (isChromeApp()) {
    chrome.storage.onChanged.addListener(function (e) {
      // make sure it's event addressed to us
      if (e.db_name != null) {
        api.notify(e.db_name.newValue);//object only has oldValue, newValue members
      }
    });
  } else if (typeof window !== 'undefined') {
    global.addEventListener("storage", function (e) {
      api.notify(e.key);
    });
  }

  api.addListener = function (db_name, id, db, opts) {
    if (!listeners[db_name]) {
      listeners[db_name] = {};
    }
    listeners[db_name][id] = {
      db: db,
      opts: opts
    };
  };

  api.removeListener = function (db_name, id) {
    if (listeners[db_name]) {
      delete listeners[db_name][id];
    }
  };

  api.clearListeners = function (db_name) {
    delete listeners[db_name];
  };

  api.notifyLocalWindows = function (db_name) {
    //do a useless change on a storage thing
    //in order to get other windows's listeners to activate
    if (isChromeApp()) {
      chrome.storage.local.set({db_name: db_name});
    } else if (global.localStorage) {
      localStorage[db_name] = (localStorage[db_name] === "a") ? "b" : "a";
    }
  };

  api.notify = function (db_name) {
    if (!listeners[db_name]) { return; }

    Object.keys(listeners[db_name]).forEach(function (i) {
      var opts = listeners[db_name][i].opts;
      listeners[db_name][i].db.changes({
        include_docs: opts.include_docs,
        conflicts: opts.conflicts,
        continuous: false,
        descending: false,
        filter: opts.filter,
        view: opts.view,
        since: opts.since,
        query_params: opts.query_params,
        onChange: function (c) {
          if (c.seq > opts.since && !opts.cancelled) {
            opts.since = c.seq;
            exports.call(opts.onChange, c);
          }
        }
      });
    });
  };

  return api;
};

if (!process.browser || !('atob' in global)) {
  exports.atob = function (str) {
    var base64 = new buffer(str, 'base64');
    // Node.js will just skip the characters it can't encode instead of
    // throwing and exception
    if (base64.toString('base64') !== str) {
      throw ("Cannot base64 encode full string");
    }
    return base64.toString('binary');
  };
} else {
  exports.atob = function (str) {
    return atob(str);
  };
}

if (!process.browser || !('btoa' in global)) {
  exports.btoa = function (str) {
    return new buffer(str, 'binary').toString('base64');
  };
} else {
  exports.btoa = function (str) {
    return btoa(str);
  };
}

// From http://stackoverflow.com/questions/14967647/encode-decode-image-with-base64-breaks-image (2013-04-21)
exports.fixBinary = function (bin) {
  if (!process.browser) {
    // don't need to do this in Node
    return bin;
  }

  var length = bin.length;
  var buf = new ArrayBuffer(length);
  var arr = new Uint8Array(buf);
  for (var i = 0; i < length; i++) {
    arr[i] = bin.charCodeAt(i);
  }
  return buf;
};

exports.toPromise = function (func) {
  //create the function we will be returning
  return function () {
    var self = this;
    var args = Array.prototype.slice.call(arguments);
    var tempCB = (typeof args[args.length - 1] === 'function') ? args.pop() : false;
    // if the last argument is a function, assume its a callback
    var usedCB;
    if (tempCB) {
      // if it was a callback, create a new callback which calls the callback function
      // but we do so async so we don't trap any errors
      usedCB = function (err, resp) {
        process.nextTick(function () {
          tempCB(err, resp);
        });
      };
    }
    var promise = new Promise(function (fulfill, reject) {
      function callback(err, mesg) {
        if (err) {
          reject(err);
        } else {
          fulfill(mesg);
        }
      }
      // create a callback for this invocation
      args.push(callback);
      func.apply(self, args);
      // apply the function in the orig context
    });
    // if there is a callback, call it back
    if (usedCB) {
      promise.then(function (result) {
        usedCB(null, result);
      }, usedCB);
    }
    return promise;
  };
};

}).call(this,_dereq_("/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js"),typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./deps/ajax":6,"./deps/blob":7,"./deps/buffer":20,"./deps/errors":8,"./deps/extend":10,"./deps/md5.js":11,"./deps/uuid":12,"./merge":14,"/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js":22,"bluebird":24,"inherits":23}],19:[function(_dereq_,module,exports){
module.exports = _dereq_('../package.json').version;
},{"../package.json":37}],20:[function(_dereq_,module,exports){

},{}],21:[function(_dereq_,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

function EventEmitter() {
  this._events = this._events || {};
  this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!isNumber(n) || n < 0 || isNaN(n))
    throw TypeError('n must be a positive number');
  this._maxListeners = n;
  return this;
};

EventEmitter.prototype.emit = function(type) {
  var er, handler, len, args, i, listeners;

  if (!this._events)
    this._events = {};

  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events.error ||
        (isObject(this._events.error) && !this._events.error.length)) {
      er = arguments[1];
      if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      } else {
        throw TypeError('Uncaught, unspecified "error" event.');
      }
      return false;
    }
  }

  handler = this._events[type];

  if (isUndefined(handler))
    return false;

  if (isFunction(handler)) {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        len = arguments.length;
        args = new Array(len - 1);
        for (i = 1; i < len; i++)
          args[i - 1] = arguments[i];
        handler.apply(this, args);
    }
  } else if (isObject(handler)) {
    len = arguments.length;
    args = new Array(len - 1);
    for (i = 1; i < len; i++)
      args[i - 1] = arguments[i];

    listeners = handler.slice();
    len = listeners.length;
    for (i = 0; i < len; i++)
      listeners[i].apply(this, args);
  }

  return true;
};

EventEmitter.prototype.addListener = function(type, listener) {
  var m;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events)
    this._events = {};

  // To avoid recursion in the case that type === "newListener"! Before
  // adding it to the listeners, first emit "newListener".
  if (this._events.newListener)
    this.emit('newListener', type,
              isFunction(listener.listener) ?
              listener.listener : listener);

  if (!this._events[type])
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
  else if (isObject(this._events[type]))
    // If we've already got an array, just append.
    this._events[type].push(listener);
  else
    // Adding the second element, need to change to array.
    this._events[type] = [this._events[type], listener];

  // Check for listener leak
  if (isObject(this._events[type]) && !this._events[type].warned) {
    var m;
    if (!isUndefined(this._maxListeners)) {
      m = this._maxListeners;
    } else {
      m = EventEmitter.defaultMaxListeners;
    }

    if (m && m > 0 && this._events[type].length > m) {
      this._events[type].warned = true;
      console.error('(node) warning: possible EventEmitter memory ' +
                    'leak detected. %d listeners added. ' +
                    'Use emitter.setMaxListeners() to increase limit.',
                    this._events[type].length);
      console.trace();
    }
  }

  return this;
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.once = function(type, listener) {
  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  var fired = false;

  function g() {
    this.removeListener(type, g);

    if (!fired) {
      fired = true;
      listener.apply(this, arguments);
    }
  }

  g.listener = listener;
  this.on(type, g);

  return this;
};

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener = function(type, listener) {
  var list, position, length, i;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events || !this._events[type])
    return this;

  list = this._events[type];
  length = list.length;
  position = -1;

  if (list === listener ||
      (isFunction(list.listener) && list.listener === listener)) {
    delete this._events[type];
    if (this._events.removeListener)
      this.emit('removeListener', type, listener);

  } else if (isObject(list)) {
    for (i = length; i-- > 0;) {
      if (list[i] === listener ||
          (list[i].listener && list[i].listener === listener)) {
        position = i;
        break;
      }
    }

    if (position < 0)
      return this;

    if (list.length === 1) {
      list.length = 0;
      delete this._events[type];
    } else {
      list.splice(position, 1);
    }

    if (this._events.removeListener)
      this.emit('removeListener', type, listener);
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  var key, listeners;

  if (!this._events)
    return this;

  // not listening for removeListener, no need to emit
  if (!this._events.removeListener) {
    if (arguments.length === 0)
      this._events = {};
    else if (this._events[type])
      delete this._events[type];
    return this;
  }

  // emit removeListener for all listeners on all events
  if (arguments.length === 0) {
    for (key in this._events) {
      if (key === 'removeListener') continue;
      this.removeAllListeners(key);
    }
    this.removeAllListeners('removeListener');
    this._events = {};
    return this;
  }

  listeners = this._events[type];

  if (isFunction(listeners)) {
    this.removeListener(type, listeners);
  } else {
    // LIFO order
    while (listeners.length)
      this.removeListener(type, listeners[listeners.length - 1]);
  }
  delete this._events[type];

  return this;
};

EventEmitter.prototype.listeners = function(type) {
  var ret;
  if (!this._events || !this._events[type])
    ret = [];
  else if (isFunction(this._events[type]))
    ret = [this._events[type]];
  else
    ret = this._events[type].slice();
  return ret;
};

EventEmitter.listenerCount = function(emitter, type) {
  var ret;
  if (!emitter._events || !emitter._events[type])
    ret = 0;
  else if (isFunction(emitter._events[type]))
    ret = 1;
  else
    ret = emitter._events[type].length;
  return ret;
};

function isFunction(arg) {
  return typeof arg === 'function';
}

function isNumber(arg) {
  return typeof arg === 'number';
}

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}

function isUndefined(arg) {
  return arg === void 0;
}

},{}],22:[function(_dereq_,module,exports){
// shim for using process in browser

var process = module.exports = {};

process.nextTick = (function () {
    var canSetImmediate = typeof window !== 'undefined'
    && window.setImmediate;
    var canPost = typeof window !== 'undefined'
    && window.postMessage && window.addEventListener
    ;

    if (canSetImmediate) {
        return function (f) { return window.setImmediate(f) };
    }

    if (canPost) {
        var queue = [];
        window.addEventListener('message', function (ev) {
            var source = ev.source;
            if ((source === window || source === null) && ev.data === 'process-tick') {
                ev.stopPropagation();
                if (queue.length > 0) {
                    var fn = queue.shift();
                    fn();
                }
            }
        }, true);

        return function nextTick(fn) {
            queue.push(fn);
            window.postMessage('process-tick', '*');
        };
    }

    return function nextTick(fn) {
        setTimeout(fn, 0);
    };
})();

process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];

process.binding = function (name) {
    throw new Error('process.binding is not supported');
}

// TODO(shtylman)
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};

},{}],23:[function(_dereq_,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],24:[function(_dereq_,module,exports){
'use strict';

var immediate = _dereq_('immediate');
var isDefineProp = false;
// prevents deoptimization
(function(){
    try {
        Object.defineProperty({}, 'test', {value:true});
        isDefineProp = true;
    }catch(e){}
}());
function defineNonEnum(obj, name, value){
    if(isDefineProp){
         Object.defineProperty(obj, name, {
            value: value,
            configurable: true,
            writable: true
        });
    }else{
        obj[name] = value;
    }
}
function Promise(resolver) {

     if (!(this instanceof Promise)) {
        return new Promise(resolver);
    }

    defineNonEnum(this, 'successQueue', []);
    defineNonEnum(this, 'failureQueue', []);
    defineNonEnum(this, 'resolved', false);

  
    if(typeof resolver === 'function'){
        this.resolvePassed(resolver);
    }
}
defineNonEnum(Promise.prototype, 'resolvePassed', function(resolver){
    try{
        resolver(this.fulfillUnwrap.bind(this),this.reject.bind(this));
    }catch(e){
        this.reject(e);
    }
});
defineNonEnum(Promise.prototype, 'reject', function(reason){
    this.resolve(false,reason);
});
defineNonEnum(Promise.prototype, 'fulfill', function(value){
    this.resolve(true,value);
});
defineNonEnum(Promise.prototype, 'fulfillUnwrap', function(value){
    unwrap(this.fulfill.bind(this), this.reject.bind(this), value);
});
Promise.prototype.then = function(onFulfilled, onRejected) {
    if(this.resolved){
        return this.resolved(onFulfilled, onRejected);
    } else {
        return this.pending(onFulfilled, onRejected);
    }
};
(function(){
    try {
        Promise.prototype.catch = function(onRejected) {
            return this.then(null, onRejected);
        };
    } catch(e){}
}());
defineNonEnum(Promise.prototype, 'pending', function(onFulfilled, onRejected){
    var self = this;
    return new Promise(function(success,failure){
        if(typeof onFulfilled === 'function'){
            self.successQueue.push({
                resolve: success,
                reject: failure,
                callback:onFulfilled
            });
        }else{
            self.successQueue.push({
                next: success,
                callback:false
            });
        }

        if(typeof onRejected === 'function'){
            self.failureQueue.push({
                resolve: success,
                reject: failure,
                callback:onRejected
            });
        }else{
            self.failureQueue.push({
                next: failure,
                callback:false
            });
        }
    });
});
defineNonEnum(Promise.prototype, 'resolve', function (success, value){

    if(this.resolved){
        return;
    }

    this.resolved = createResolved(this, value, success?0:1);

    var queue = success ? this.successQueue : this.failureQueue;
    var len = queue.length;
    var i = -1;
    while(++i < len) {

        if (queue[i].callback) {
            immediate(execute,queue[i].callback, value, queue[i].resolve, queue[i].reject);
        }else {
            queue[i].next(value);
        }
    }
});

function unwrap(fulfill, reject, value){
    if(value && typeof value.then==='function'){
        value.then(fulfill,reject);
    }else{
        fulfill(value);
    }
}

function createResolved(scope, value, whichArg) {
    function resolved() {
        var callback = arguments[whichArg];
        if (typeof callback !== 'function') {
            return scope;
        }else{
            return new Promise(function(resolve,reject){
                immediate(execute,callback,value,resolve,reject);
            });
        }
    }
    return resolved;
}

function execute(callback, value, resolve, reject) {
    try {
        unwrap(resolve,reject,callback(value));
    } catch (error) {
        reject(error);
    }
}



module.exports = Promise;

},{"immediate":27}],25:[function(_dereq_,module,exports){
"use strict";
exports.test = function () {
    return false;
};
},{}],26:[function(_dereq_,module,exports){
(function (global){
module.exports = typeof global === "object" && global ? global : this;
}).call(this,typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],27:[function(_dereq_,module,exports){
"use strict";
var types = [
    _dereq_("./nextTick"),
    _dereq_("./mutation"),
    _dereq_("./realSetImmediate"),
    _dereq_("./postMessage"),
    _dereq_("./messageChannel"),
    _dereq_("./stateChange"),
    _dereq_("./timeout")
];
var handlerQueue = [];
function drainQueue() {
    var i = 0,
        task,
        innerQueue = handlerQueue;
	handlerQueue = [];
	/*jslint boss: true */
	while (task = innerQueue[i++]) {
		task();
	}
}
var nextTick;
var i = -1;
var len = types.length;
while(++i<len){
    if(types[i].test()){
        nextTick = types[i].install(drainQueue);
        break;
    }
}
var retFunc = function (task) {
    var len, args;
    var nTask = task;
    if (arguments.length > 1 && typeof task === "function") {
        args = Array.prototype.slice.call(arguments, 1);
        nTask = function(){
            task.apply(undefined,args);
        }
    }
    if ((len = handlerQueue.push(nTask)) === 1) {
        nextTick(drainQueue);
    }
    return len;
};
retFunc.clear = function (n) {
    if (n <= handlerQueue.length) {
        handlerQueue[n - 1] = function () {};
    }
    return this;
};
module.exports = retFunc;

},{"./messageChannel":28,"./mutation":29,"./nextTick":25,"./postMessage":30,"./realSetImmediate":31,"./stateChange":32,"./timeout":33}],28:[function(_dereq_,module,exports){
"use strict";
var globe = _dereq_("./global");
exports.test = function () {
    return !!globe.MessageChannel;
};

exports.install = function (func) {
    var channel = new globe.MessageChannel();
    channel.port1.onmessage = func;
    return function () {
        channel.port2.postMessage(0);
    };
};
},{"./global":26}],29:[function(_dereq_,module,exports){
"use strict";
//based off rsvp
//https://github.com/tildeio/rsvp.js/blob/master/lib/rsvp/async.js
var globe = _dereq_("./global");

var MutationObserver = globe.MutationObserver || globe.WebKitMutationObserver;

exports.test = function () {
    return MutationObserver;
};

exports.install = function (handle) {
    var observer = new MutationObserver(handle);
    var element = globe.document.createElement("div");
    observer.observe(element, { attributes: true });

    // Chrome Memory Leak: https://bugs.webkit.org/show_bug.cgi?id=93661
    globe.addEventListener("unload", function () {
        observer.disconnect();
        observer = null;
    }, false);
    return function () {
        element.setAttribute("drainQueue", "drainQueue");
    };
};
},{"./global":26}],30:[function(_dereq_,module,exports){
"use strict";
var globe = _dereq_("./global");
exports.test = function () {
    // The test against `importScripts` prevents this implementation from being installed inside a web worker,
    // where `global.postMessage` means something completely different and can"t be used for this purpose.

    if (!globe.postMessage || globe.importScripts) {
        return false;
    }

    var postMessageIsAsynchronous = true;
    var oldOnMessage = globe.onmessage;
    globe.onmessage = function () {
        postMessageIsAsynchronous = false;
    };
    globe.postMessage("", "*");
    globe.onmessage = oldOnMessage;

    return postMessageIsAsynchronous;
};

exports.install = function (func) {
    var codeWord = "com.calvinmetcalf.setImmediate" + Math.random();
    function globalMessage(event) {
        if (event.source === globe && event.data === codeWord) {
            func();
        }
    }
    if (globe.addEventListener) {
        globe.addEventListener("message", globalMessage, false);
    } else {
        globe.attachEvent("onmessage", globalMessage);
    }
    return function () {
        globe.postMessage(codeWord, "*");
    };
};
},{"./global":26}],31:[function(_dereq_,module,exports){
"use strict";
var globe = _dereq_("./global");
exports.test = function () {
    return  globe.setImmediate;
};

exports.install = function (handle) {
    return globe.setTimeout.bind(globe, handle, 0);
};

},{"./global":26}],32:[function(_dereq_,module,exports){
"use strict";
var globe = _dereq_("./global");
exports.test = function () {
    return "document" in globe && "onreadystatechange" in globe.document.createElement("script");
};

exports.install = function (handle) {
    return function () {

        // Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted
        // into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.
        var scriptEl = globe.document.createElement("script");
        scriptEl.onreadystatechange = function () {
            handle();

            scriptEl.onreadystatechange = null;
            scriptEl.parentNode.removeChild(scriptEl);
            scriptEl = null;
        };
        globe.document.documentElement.appendChild(scriptEl);

        return handle;
    };
};
},{"./global":26}],33:[function(_dereq_,module,exports){
"use strict";
exports.test = function () {
    return true;
};

exports.install = function (t) {
    return function () {
        setTimeout(t, 0);
    };
};
},{}],34:[function(_dereq_,module,exports){
'use strict';

module.exports = function (func, emit, sum, log, isArray, toJSON) {
  /*jshint evil: true */
  return eval("'use strict'; (" + func + ");");
};

},{}],35:[function(_dereq_,module,exports){
(function (process,global){
'use strict';

var pouchCollate = _dereq_('pouchdb-collate');
var Promise = typeof global.Promise === 'function' ? global.Promise : _dereq_('lie');
var collate = pouchCollate.collate;
var evalFunc = _dereq_('./evalfunc');
var log = (typeof console !== 'undefined') ?
  Function.prototype.bind.call(console.log, console) : function () {};
var processKey = function (key) {
  // Stringify keys since we want them as map keys (see #35)
  return JSON.stringify(pouchCollate.normalizeKey(key));
};
// This is the first implementation of a basic plugin, we register the
// plugin object with pouch and it is mixin'd to each database created
// (regardless of adapter), adapters can override plugins by providing
// their own implementation. functions on the plugin object that start
// with _ are reserved function that are called by pouchdb for special
// notifications.

// If we wanted to store incremental views we can do it here by listening
// to the changes feed (keeping track of our last update_seq between page loads)
// and storing the result of the map function (possibly using the upcoming
// extracted adapter functions)


function createKeysLookup(keys) {
  // creates a lookup map for the given keys, so that doing
  // query() with keys doesn't become an O(n * m) operation
  // lookup values are typically integer indexes, but may
  // map to a list of integers, since keys can be duplicated
  var lookup = {};

  for (var i = 0, len = keys.length; i < len; i++) {
    var key = processKey(keys[i]);
    var val = lookup[key];
    if (typeof val === 'undefined') {
      lookup[key] = i;
    } else if (typeof val === 'number') {
      lookup[key] = [val, i];
    } else { // array
      val.push(i);
    }
  }

  return lookup;
}

function sortByIdAndValue(a, b) {
  // sort by id, then value
  var idCompare = collate(a.id, b.id);
  return idCompare !== 0 ? idCompare : collate(a.value, b.value);
}
function addAtIndex(idx, result, prelimResults) {
  var val = prelimResults[idx];
  if (typeof val === 'undefined') {
    prelimResults[idx] = result;
  } else if (!Array.isArray(val)) {
    // same key for multiple docs, need to preserve document order, so create array
    prelimResults[idx] = [val, result];
  } else { // existing array
    val.push(result);
  }
}

function sum(values) {
  return values.reduce(function (a, b) {
    return a + b;
  }, 0);
}

var builtInReduce = {
  "_sum": function (keys, values) {
    return sum(values);
  },

  "_count": function (keys, values, rereduce) {
    return values.length;
  },

  "_stats": function (keys, values) {
    return {
      'sum': sum(values),
      'min': Math.min.apply(null, values),
      'max': Math.max.apply(null, values),
      'count': values.length,
      'sumsqr': (function () {
        var _sumsqr = 0;
        var error;
        for (var idx in values) {
          if (typeof values[idx] === 'number') {
            _sumsqr += values[idx] * values[idx];
          } else {
            error =  new Error('builtin _stats function requires map values to be numbers');
            error.name = 'invalid_value';
            error.status = 500;
            return error;
          }
        }
        return _sumsqr;
      })()
    };
  }
};

function addHttpParam(paramName, opts, params, asJson) {
  // add an http param from opts to params, optionally json-encoded
  var val = opts[paramName];
  if (typeof val !== 'undefined') {
    if (asJson) {
      val = encodeURIComponent(JSON.stringify(val));
    }
    params.push(paramName + '=' + val);
  }
}

function mapUsingKeys(inputResults, keys, keysLookup) {
  // create a new results array from the given array,
  // ensuring that the following conditions are respected:
  // 1. docs are ordered by key, then doc id
  // 2. docs can appear >1 time in the list, if their key is specified >1 time
  // 3. keys can be unknown, in which case there's just a hole in the returned array

  var prelimResults = new Array(keys.length);

  inputResults.forEach(function (result) {
    var idx = keysLookup[processKey(result.key)];
    if (typeof idx === 'number') {
      addAtIndex(idx, result, prelimResults);
    } else { // array of indices
      idx.forEach(function (subIdx) {
        addAtIndex(subIdx, result, prelimResults);
      });
    }
  });

  // flatten the array, remove nulls, sort by doc ids
  var outputResults = [];
  prelimResults.forEach(function (result) {
    if (Array.isArray(result)) {
      outputResults = outputResults.concat(result.sort(sortByIdAndValue));
    } else { // single result
      outputResults.push(result);
    }
  });

  return outputResults;
}

function viewQuery(db, fun, options) {
  var origMap;
  if (!options.skip) {
    options.skip = 0;
  }

  if (!fun.reduce) {
    options.reduce = false;
  }

  var results = [];
  var current;
  var num_started = 0;
  var completed = false;
  var keysLookup;

  function emit(key, val) {
    var viewRow = {
      id: current.doc._id,
      key: key,
      value: val
    };

    if (typeof options.startkey !== 'undefined' && collate(key, options.startkey) < 0) {
      return;
    }
    if (typeof options.endkey !== 'undefined' && collate(key, options.endkey) > 0) {
      return;
    }
    if (typeof options.key !== 'undefined' && collate(key, options.key) !== 0) {
      return;
    }
    if (typeof options.keys !== 'undefined') {
      keysLookup = keysLookup || createKeysLookup(options.keys);
      if (typeof keysLookup[processKey(key)] === 'undefined') {
        return;
      }
    }

    num_started++;
    if (options.include_docs) {
      //in this special case, join on _id (issue #106)
      if (val && typeof val === 'object' && val._id) {
        db.get(val._id,
          function (_, joined_doc) {
            if (joined_doc) {
              viewRow.doc = joined_doc;
            }
            results.push(viewRow);
            checkComplete();
          });
        return;
      } else {
        viewRow.doc = current.doc;
      }
    }
    results.push(viewRow);
  }
  if (typeof fun.map === "function" && fun.map.length === 2) {
    //save a reference to it
    origMap = fun.map;
    fun.map = function (doc) {
      //call it with the emit as the second argument
      return origMap(doc, emit);
    };
  } else {
    // ugly way to make sure references to 'emit' in map/reduce bind to the
    // above emit
    fun.map = evalFunc(fun.map.toString(), emit, sum, log, Array.isArray, JSON.parse);
  }
  if (fun.reduce) {
    if (builtInReduce[fun.reduce]) {
      fun.reduce = builtInReduce[fun.reduce];
    } else {
      fun.reduce = evalFunc(fun.reduce.toString(), emit, sum, log, Array.isArray, JSON.parse);
    }
  }

  //only proceed once all documents are mapped and joined
  function checkComplete() {
    var error;
    if (completed && results.length === num_started) {

      if (typeof options.keys !== 'undefined' && results.length) {
        // user supplied a keys param, sort by keys
        results = mapUsingKeys(results, options.keys, keysLookup);
      } else { // normal sorting
        results.sort(function (a, b) {
          // sort by key, then id
          var keyCollate = collate(a.key, b.key);
          return keyCollate !== 0 ? keyCollate : collate(a.id, b.id);
        });
      }
      if (options.descending) {
        results.reverse();
      }
      if (options.reduce === false) {
        return options.complete(null, {
          total_rows: results.length,
          offset: options.skip,
          rows: ('limit' in options) ? results.slice(options.skip, options.limit + options.skip) :
            (options.skip > 0) ? results.slice(options.skip) : results
        });
      }

      var groups = [];
      results.forEach(function (e) {
        var last = groups[groups.length - 1];
        if (last && collate(last.key[0][0], e.key) === 0) {
          last.key.push([e.key, e.id]);
          last.value.push(e.value);
          return;
        }
        groups.push({key: [
          [e.key, e.id]
        ], value: [e.value]});
      });
      groups.forEach(function (e) {
        e.value = fun.reduce.call(null, e.key, e.value);
        if (e.value.sumsqr && e.value.sumsqr instanceof Error) {
          error = e.value;
          return;
        }
        e.key = e.key[0][0];
      });
      if (error) {
        options.complete(error);
        return;
      }
      options.complete(null, {
        total_rows: groups.length,
        offset: options.skip,
        rows: ('limit' in options) ? groups.slice(options.skip, options.limit + options.skip) :
          (options.skip > 0) ? groups.slice(options.skip) : groups
      });
    }
  }

  db.changes({
    conflicts: true,
    include_docs: true,
    onChange: function (doc) {
      if (!('deleted' in doc) && doc.id[0] !== "_") {
        current = {doc: doc.doc};
        fun.map.call(null, doc.doc);
      }
    },
    complete: function () {
      completed = true;
      checkComplete();
    }
  });
}

function httpQuery(db, fun, opts) {
  var callback = opts.complete;

  // List of parameters to add to the PUT request
  var params = [];
  var body;
  var method = 'GET';

  // If opts.reduce exists and is defined, then add it to the list
  // of parameters.
  // If reduce=false then the results are that of only the map function
  // not the final result of map and reduce.
  addHttpParam('reduce', opts, params);
  addHttpParam('include_docs', opts, params);
  addHttpParam('limit', opts, params);
  addHttpParam('descending', opts, params);
  addHttpParam('group', opts, params);
  addHttpParam('group_level', opts, params);
  addHttpParam('skip', opts, params);
  addHttpParam('startkey', opts, params, true);
  addHttpParam('endkey', opts, params, true);
  addHttpParam('key', opts, params, true);

  // If keys are supplied, issue a POST request to circumvent GET query string limits
  // see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options
  if (typeof opts.keys !== 'undefined') {
    method = 'POST';
    if (typeof fun === 'string') {
      body = JSON.stringify({keys: opts.keys});
    } else { // fun is {map : mapfun}, so append to this
      fun.keys = opts.keys;
    }
  }

  // Format the list of parameters into a valid URI query string
  params = params.join('&');
  params = params === '' ? '' : '?' + params;

  // We are referencing a query defined in the design doc
  if (typeof fun === 'string') {
    var parts = fun.split('/');
    db.request({
      method: method,
      url: '_design/' + parts[0] + '/_view/' + parts[1] + params,
      body: body
    }, callback);
    return;
  }

  // We are using a temporary view, terrible for performance but good for testing
  var queryObject = JSON.parse(JSON.stringify(fun, function (key, val) {
    if (typeof val === 'function') {
      return val + ''; // implicitly `toString` it
    }
    return val;
  }));

  db.request({
    method: 'POST',
    url: '_temp_view' + params,
    body: queryObject
  }, callback);
}

exports.query = function (fun, opts, callback) {
  var db = this;
  if (typeof opts === 'function') {
    callback = opts;
    opts = {};
  }
  opts = opts || {};
  if (callback) {
    opts.complete = callback;
  }
  var tempCB = opts.complete;
  var realCB;
  if (opts.complete) {
    realCB = function (err, resp) {
      process.nextTick(function () {
        tempCB(err, resp);
      });
    };
  } 
  var promise = new Promise(function (resolve, reject) {
    opts.complete = function (err, data) {
      if (err) {
        reject(err);
      } else {
        resolve(data);
      }
    };

    if (db.type() === 'http') {
      if (typeof fun === 'function') {
        return httpQuery(db, {map: fun}, opts);
      }
      return httpQuery(db, fun, opts);
    }

    if (typeof fun === 'object') {
      return viewQuery(db, fun, opts);
    }

    if (typeof fun === 'function') {
      return viewQuery(db, {map: fun}, opts);
    }

    var parts = fun.split('/');
    db.get('_design/' + parts[0], function (err, doc) {
      if (err) {
        opts.complete(err);
        return;
      }

      if (!doc.views[parts[1]]) {
        opts.complete({ name: 'not_found', message: 'missing_named_view' });
        return;
      }
      viewQuery(db, {
        map: doc.views[parts[1]].map,
        reduce: doc.views[parts[1]].reduce
      }, opts);
    });
  });
  if (realCB) {
    promise.then(function (resp) {
      realCB(null, resp);
    }, realCB);
  }
  return promise;
};

}).call(this,_dereq_("/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js"),typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./evalfunc":34,"/Users/daleharvey/src/pouchdb/node_modules/browserify/node_modules/insert-module-globals/node_modules/process/browser.js":22,"lie":24,"pouchdb-collate":36}],36:[function(_dereq_,module,exports){
'use strict';

exports.collate = function (a, b) {
  a = exports.normalizeKey(a);
  b = exports.normalizeKey(b);
  var ai = collationIndex(a);
  var bi = collationIndex(b);
  if ((ai - bi) !== 0) {
    return ai - bi;
  }
  if (a === null) {
    return 0;
  }
  if (typeof a === 'number') {
    return a - b;
  }
  if (typeof a === 'boolean') {
    return a === b ? 0 : (a < b ? -1 : 1);
  }
  if (typeof a === 'string') {
    return stringCollate(a, b);
  }
  if (Array.isArray(a)) {
    return arrayCollate(a, b);
  }
  if (typeof a === 'object') {
    return objectCollate(a, b);
  }
}

// couch considers null/NaN/Infinity/-Infinity === undefined,
// for the purposes of mapreduce indexes. also, dates get stringified.
exports.normalizeKey = function (key) {
  if (typeof key === 'undefined') {
    return null;
  } else if (typeof key === 'number') {
    if (key === Infinity || key === -Infinity || isNaN(key)) {
      return null;
    }
  } else if (key instanceof Date) {
    return key.toJSON();
  }
  return key;
}

function arrayCollate(a, b) {
  var len = Math.min(a.length, b.length);
  for (var i = 0; i < len; i++) {
    var sort = exports.collate(a[i], b[i]);
    if (sort !== 0) {
      return sort;
    }
  }
  return (a.length === b.length) ? 0 :
    (a.length > b.length) ? 1 : -1;
}
function stringCollate(a, b) {
  // See: https://github.com/daleharvey/pouchdb/issues/40
  // This is incompatible with the CouchDB implementation, but its the
  // best we can do for now
  return (a === b) ? 0 : ((a > b) ? 1 : -1);
}
function objectCollate(a, b) {
  var ak = Object.keys(a), bk = Object.keys(b);
  var len = Math.min(ak.length, bk.length);
  for (var i = 0; i < len; i++) {
    // First sort the keys
    var sort = exports.collate(ak[i], bk[i]);
    if (sort !== 0) {
      return sort;
    }
    // if the keys are equal sort the values
    sort = exports.collate(a[ak[i]], b[bk[i]]);
    if (sort !== 0) {
      return sort;
    }

  }
  return (ak.length === bk.length) ? 0 :
    (ak.length > bk.length) ? 1 : -1;
}
// The collation is defined by erlangs ordered terms
// the atoms null, true, false come first, then numbers, strings,
// arrays, then objects
// null/undefined/NaN/Infinity/-Infinity are all considered null
function collationIndex(x) {
  var id = ['boolean', 'number', 'string', 'object'];
  if (id.indexOf(typeof x) !== -1) {
    if (x === null) {
      return 1;
    }
    return id.indexOf(typeof x) + 2;
  }
  if (Array.isArray(x)) {
    return 4.5;
  }
}

},{}],37:[function(_dereq_,module,exports){
module.exports={
  "name": "pouchdb",
  "version": "2.0.0",
  "description": "PouchDBVersion200 is a pocket-sized database.",
  "release": "nightly",
  "main": "./lib/index.js",
  "homepage": "https://github.com/daleharvey/pouchdb",
  "repository": "https://github.com/daleharvey/pouchdb",
  "keywords": [
    "db",
    "couchdb",
    "pouchdb"
  ],
  "tags": [
    "db",
    "couchdb",
    "pouchdb"
  ],
  "dependencies": {
    "request": "~2.28.0",
    "pouchdb-mapreduce": "1.0.0",
    "bluebird": "~1.0.0",
    "level-sublevel": "~5.2.0",
    "levelup": "~0.18.2",
    "leveldown": "~0.10.2",
    "inherits": "~2.0.1"
  },
  "devDependencies": {
    "commander": "~2.1.0",
    "watchify": "~0.4.1",
    "uglify-js": "~2.4.6",
    "jshint": "~2.3.0",
    "http-proxy": "~0.10.3",
    "corsproxy": "~0.2.13",
    "http-server": "~0.5.5",
    "browserify": "~3.24.13",
    "lie": "~2.5.2",
    "wd": "~0.2.8",
    "tin": "~0.4.0",
    "qunit-mocha-ui": "0.0.5",
    "mocha": "~1.17.1",
    "chai": "~1.9.0",
    "istanbul": "~0.2.4",
    "ncp": "~0.5.0"
  },
  "scripts": {
    "jshint": "jshint -c .jshintrc bin/ lib/ tests/*.js",
    "build-js": "browserify lib/index.js -s PouchDBVersion200 -o dist/pouchdb-nightly.js",
    "uglify": "uglifyjs dist/pouchdb-nightly.js -mc > dist/pouchdb-nightly.min.js",
    "build": "mkdir -p dist && npm run build-js && npm run uglify",
    "test-node": "./bin/run-mocha.sh",
    "test-browser": "mkdir -p dist && npm run build-js && ./bin/test-browser.js",
    "dev": "./bin/dev-server.js",
    "test": "npm run jshint && ./bin/run-test.sh",
    "publish": "./bin/publish.sh",
    "publish-site": "./bin/publish-site.sh"
  },
  "browser": {
    "./adapters/leveldb": false,
    "./deps/buffer": false,
    "request": false,
    "levelup": false,
    "leveldown": false,
    "crypto": false,
    "bluebird": "lie",
    "level-sublevel": false
  }
}

},{}]},{},[13])
(13)
});