<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

/**
 * ThinkPHP内置模板引擎类
 * 支持XML标签和普通标签的模板解析
 * 编译型模板引擎 支持动态缓存
 * @category   Think
 * @package  Think
 * @subpackage  Template
 * @author liu21st <liu21st@gmail.com>
 */
class ThinkTemplate {

    // 模板页面中引入的标签库列表
    protected $tagLib = array();
    // 当前模板文件
    protected $templateFile = '';
    // 模板变量
    public $tVar = array();
    public $config = array();
    private $literal = array();
    private $block = array();

    /**
     * 架构函数
     * @access public
     */
    public function __construct() {
        $this->config['cache_path'] = C('CACHE_PATH');
        $this->config['template_suffix'] = C('TMPL_TEMPLATE_SUFFIX');
        $this->config['cache_suffix'] = C('TMPL_CACHFILE_SUFFIX');
        $this->config['tmpl_cache'] = C('TMPL_CACHE_ON');
        $this->config['cache_time'] = C('TMPL_CACHE_TIME');
        $this->config['taglib_begin'] = $this->stripPreg(C('TAGLIB_BEGIN'));
        $this->config['taglib_end'] = $this->stripPreg(C('TAGLIB_END'));
        $this->config['tmpl_begin'] = $this->stripPreg(C('TMPL_L_DELIM'));
        $this->config['tmpl_end'] = $this->stripPreg(C('TMPL_R_DELIM'));
        $this->config['default_tmpl'] = C('TEMPLATE_NAME');
        $this->config['layout_item'] = C('TMPL_LAYOUT_ITEM');
    }

    private function stripPreg($str) {
        return str_replace(
                array('{', '}', '(', ')', '|', '[', ']', '-', '+', '*', '.', '^', '?'), array('\{', '\}', '\(', '\)', '\|', '\[', '\]', '\-', '\+', '\*', '\.', '\^', '\?'), $str);
    }

    // 模板变量获取和设置
    public function get($name) {
        if (isset($this->tVar[$name]))
            return $this->tVar[$name];
        else
            return false;
    }

    public function set($name, $value) {
        $this->tVar[$name] = $value;
    }

    /**
     * 加载模板
     * @access public
     * @param string $tmplTemplateFile 模板文件
     * @param array  $templateVar 模板变量
     * @param string $prefix 模板标识前缀
     * @return void
     */
    public function fetch($templateFile, $templateVar, $prefix = '') {
        $this->tVar = $templateVar;
        $templateCacheFile = $this->loadTemplate($templateFile, $prefix);
        // 模板阵列变量分解成为独立变量
        extract($templateVar, EXTR_OVERWRITE);
        //载入模版缓存文件
        include $templateCacheFile;
    }

    /**
     * 加载主模板并缓存
     * @access public
     * @param string $tmplTemplateFile 模板文件
     * @param string $prefix 模板标识前缀
     * @return string
     * @throws ThinkExecption
     */
    public function loadTemplate($tmplTemplateFile, $prefix = '') {
        if (is_file($tmplTemplateFile)) {
            $this->templateFile = $tmplTemplateFile;
            // 读取模板文件内容
            $tmplContent = file_get_contents($tmplTemplateFile);
        } else {
            $tmplContent = $tmplTemplateFile;
        }
        // 根据模版文件名定位缓存文件
        $tmplCacheFile = $this->config['cache_path'] . $prefix . md5($tmplTemplateFile) . $this->config['cache_suffix'];

        // 判断是否启用布局
        if (C('LAYOUT_ON')) {
            if (false !== strpos($tmplContent, '{__NOLAYOUT__}')) { // 可以单独定义不使用布局
                $tmplContent = str_replace('{__NOLAYOUT__}', '', $tmplContent);
            } else { // 替换布局的主体内容
                $layoutFile = THEME_PATH . C('LAYOUT_NAME') . $this->config['template_suffix'];
                $tmplContent = str_replace($this->config['layout_item'], $tmplContent, file_get_contents($layoutFile));
            }
        }
        // 编译模板内容
        $tmplContent = $this->compiler($tmplContent);
        // 检测模板目录
        $dir = dirname($tmplCacheFile);
        if (!is_dir($dir))
            mkdir($dir, 0755, true);
        //重写Cache文件
        if (false === file_put_contents($tmplCacheFile, trim($tmplContent)))
            throw_exception(L('_CACHE_WRITE_ERROR_') . ':' . $tmplCacheFile);
        return $tmplCacheFile;
    }

    /**
     * 编译模板文件内容
     * @access protected
     * @param mixed $tmplContent 模板内容
     * @return string
     */
    protected function compiler($tmplContent) {
        //模板解析
        $tmplContent = $this->parse($tmplContent);
        // 还原被替换的Literal标签
        //$tmplContent = preg_replace('/<!--###literal(\d+)###-->/eis', "\$this->restoreLiteral('\\1')", $tmplContent);
        $tmplContent = preg_replace_callback('/<!--###literal(\d+)###-->/is', function($r) {
            return $this->restoreLiteral($r[1]);
        }, $tmplContent);
        // 添加安全代码
        $tmplContent = '<?php if (!defined(\'THINK_PATH\')) exit();?>' . $tmplContent;
        if (C('TMPL_STRIP_SPACE')) {
            /* 去除html空格与换行 */
            $find = array('~>\s+<~', '~>(\s+\n|\r)~');
            $replace = array('><', '>');
            $tmplContent = preg_replace($find, $replace, $tmplContent);
        }
        // 优化生成的php代码
        $tmplContent = str_replace('?><?php', '', $tmplContent);
        return strip_whitespace($tmplContent);
    }

    /**
     * 模板解析入口
     * 支持普通标签和TagLib解析 支持自定义标签库
     * @access public
     * @param string $content 要解析的模板内容
     * @return string
     */
    public function parse($content) {
        // 内容为空不解析
        if (empty($content))
            return '';
        $begin = $this->config['taglib_begin'];
        $end = $this->config['taglib_end'];
        // 检查include语法
        $content = $this->parseInclude($content);
        // 检查PHP语法
        $content = $this->parsePhp($content);
        // 首先替换literal标签内容
        //$content    =   preg_replace('/'.$begin.'literal'.$end.'(.*?)'.$begin.'\/literal'.$end.'/eis',"\$this->parseLiteral('\\1')",$content);
        $content = preg_replace_callback('/' . $begin . 'literal' . $end . '(.*?)' . $begin . '\/literal' . $end . '/is', function($r) {
            return $this->parseLiteral($r[1]);
        }, $content);

        // 获取需要引入的标签库列表
        // 标签库只需要定义一次，允许引入多个一次
        // 一般放在文件的最前面
        // 格式：<taglib name="html,mytag..." />
        // 当TAGLIB_LOAD配置为true时才会进行检测
        if (C('TAGLIB_LOAD')) {
            $this->getIncludeTagLib($content);
            if (!empty($this->tagLib)) {
                // 对导入的TagLib进行解析
                foreach ($this->tagLib as $tagLibName) {
                    $this->parseTagLib($tagLibName, $content);
                }
            }
        }
        // 预先加载的标签库 无需在每个模板中使用taglib标签加载 但必须使用标签库XML前缀
        if (C('TAGLIB_PRE_LOAD')) {
            $tagLibs = explode(',', C('TAGLIB_PRE_LOAD'));
            foreach ($tagLibs as $tag) {
                $this->parseTagLib($tag, $content);
            }
        }
        // 内置标签库 无需使用taglib标签导入就可以使用 并且不需使用标签库XML前缀
        $tagLibs = explode(',', C('TAGLIB_BUILD_IN'));
        foreach ($tagLibs as $tag) {
            $this->parseTagLib($tag, $content, true);
        }
        //解析普通模板标签 {tagName}
        //$content = preg_replace('/(' . $this->config['tmpl_begin'] . ')([^\d\s' . $this->config['tmpl_begin'] . $this->config['tmpl_end'] . '].+?)(' . $this->config['tmpl_end'] . ')/eis', "\$this->parseTag('\\2')", $content);
        $content = preg_replace_callback('/(' . $this->config['tmpl_begin'] . ')([^\d\s' . $this->config['tmpl_begin'] . $this->config['tmpl_end'] . '].+?)(' . $this->config['tmpl_end'] . ')/is', function($r) {
            return $this->parseTag($r[2]);
        }, $content);
        return $content;
    }

    // 检查PHP语法
    protected function parsePhp($content) {
        if (ini_get('short_open_tag')) {
            // 开启短标签的情况要将<?标签用echo方式输出 否则无法正常输出xml标识
            $content = preg_replace('/(<\?(?!php|=|$))/i', '<?php echo \'\\1\'; ?>' . "\n", $content);
        }
        // PHP语法检查
        if (C('TMPL_DENY_PHP') && false !== strpos($content, '<?php')) {
            throw_exception(L('_NOT_ALLOW_PHP_'));
        }
        return $content;
    }

    // 解析模板中的布局标签
    protected function parseLayout($content) {
        // 读取模板中的布局标签
        $find = preg_match('/' . $this->config['taglib_begin'] . 'layout\s(.+?)\s*?\/' . $this->config['taglib_end'] . '/is', $content, $matches);
        if ($find) {
            //替换Layout标签
            $content = str_replace($matches[0], '', $content);
            //解析Layout标签
            $array = $this->parseXmlAttrs($matches[1]);
            if (!C('LAYOUT_ON') || C('LAYOUT_NAME') != $array['name']) {
                // 读取布局模板
                $layoutFile = THEME_PATH . $array['name'] . $this->config['template_suffix'];
                $replace = isset($array['replace']) ? $array['replace'] : $this->config['layout_item'];
                // 替换布局的主体内容
                $content = str_replace($replace, $content, file_get_contents($layoutFile));
            }
        } else {
            $content = str_replace('{__NOLAYOUT__}', '', $content);
        }
        return $content;
    }

    // 解析模板中的include标签
    protected function parseInclude($content) {
        // 解析继承
        $content = $this->parseExtend($content);
        // 解析布局
        $content = $this->parseLayout($content);
        // 读取模板中的include标签
        $find = preg_match_all('/' . $this->config['taglib_begin'] . 'include\s(.+?)\s*?\/' . $this->config['taglib_end'] . '/is', $content, $matches);
        if ($find) {
            for ($i = 0; $i < $find; $i++) {
                $include = $matches[1][$i];
                $array = $this->parseXmlAttrs($include);
                $file = $array['file'];
                unset($array['file']);
                $content = str_replace($matches[0][$i], $this->parseIncludeItem($file, $array), $content);
            }
        }
        return $content;
    }

    // 解析模板中的extend标签
    protected function parseExtend($content) {
        $begin = $this->config['taglib_begin'];
        $end = $this->config['taglib_end'];
        // 读取模板中的继承标签
        $find = preg_match('/' . $begin . 'extend\s(.+?)\s*?\/' . $end . '/is', $content, $matches);
        if ($find) {
            //替换extend标签
            $content = str_replace($matches[0], '', $content);
            // 记录页面中的block标签
            //preg_replace('/' . $begin . 'block\sname=(.+?)\s*?' . $end . '(.*?)' . $begin . '\/block' . $end . '/eis', "\$this->parseBlock('\\1','\\2')", $content);
            preg_replace_callback('/' . $begin . 'block\sname=(.+?)\s*?' . $end . '(.*?)' . $begin . '\/block' . $end . '/is', function ($r) {
                $this->parseBlock($r[1], $r[2]);
            }, $content);
            // 读取继承模板
            $array = $this->parseXmlAttrs($matches[1]);
            $content = $this->parseTemplateName($array['name']);
            // 替换block标签
            //$content = preg_replace('/' . $begin . 'block\sname=(.+?)\s*?' . $end . '(.*?)' . $begin . '\/block' . $end . '/eis', "\$this->replaceBlock('\\1','\\2')", $content);
            $content = preg_replace_callback('/' . $begin . 'block\sname=(.+?)\s*?' . $end . '(.*?)' . $begin . '\/block' . $end . '/is', function ($r) {
                return replaceBlock($r[1], $r[2]);
            }, $content);
        } else {
            //$content    =   preg_replace('/'.$begin.'block\sname=(.+?)\s*?'.$end.'(.*?)'.$begin.'\/block'.$end.'/eis',"stripslashes('\\2')",$content);  
            $content = preg_replace_callback('/' . $begin . 'block\sname=(.+?)\s*?' . $end . '(.*?)' . $begin . '\/block' . $end . '/is', function ($r) {
                return stripslashes($r[2]);
            }, $content);
        }
        return $content;
    }

    /**
     * 分析XML属性
     * @access private
     * @param string $attrs  XML属性字符串
     * @return array
     */
    private function parseXmlAttrs($attrs) {
        $xml = '<tpl><tag ' . $attrs . ' /></tpl>';
        $xml = simplexml_load_string($xml);
        if (!$xml)
            throw_exception(L('_XML_TAG_ERROR_'));
        $xml = (array) ($xml->tag->attributes());
        $array = array_change_key_case($xml['@attributes']);
        return $array;
    }

    /**
     * 替换页面中的literal标签
     * @access private
     * @param string $content  模板内容
     * @return string|false
     */
    private function parseLiteral($content) {
        if (trim($content) == '')
            return '';
        $content = stripslashes($content);
        $i = count($this->literal);
        $parseStr = "<!--###literal{$i}###-->";
        $this->literal[$i] = $content;
        return $parseStr;
    }

    /**
     * 还原被替换的literal标签
     * @access private
     * @param string $tag  literal标签序号
     * @return string|false
     */
    private function restoreLiteral($tag) {
        // 还原literal标签
        $parseStr = $this->literal[$tag];
        // 销毁literal记录
        unset($this->literal[$tag]);
        return $parseStr;
    }

    /**
     * 记录当前页面中的block标签
     * @access private
     * @param string $name block名称
     * @param string $content  模板内容
     * @return string
     */
    private function parseBlock($name, $content) {
        $this->block[$name] = $content;
        return '';
    }

    /**
     * 替换继承模板中的block标签
     * @access private
     * @param string $name  block名称
     * @param string $content  模板内容
     * @return string
     */
    private function replaceBlock($name, $content) {
        // 替换block标签 没有重新定义则使用原来的
        $replace = isset($this->block[$name]) ? $this->block[$name] : $content;
        return stripslashes($replace);
    }

    /**
     * 搜索模板页面中包含的TagLib库
     * 并返回列表
     * @access public
     * @param string $content  模板内容
     * @return string|false
     */
    public function getIncludeTagLib(& $content) {
        //搜索是否有TagLib标签
        $find = preg_match('/' . $this->config['taglib_begin'] . 'taglib\s(.+?)(\s*?)\/' . $this->config['taglib_end'] . '\W/is', $content, $matches);
        if ($find) {
            //替换TagLib标签
            $content = str_replace($matches[0], '', $content);
            //解析TagLib标签
            $array = $this->parseXmlAttrs($matches[1]);
            $this->tagLib = explode(',', $array['name']);
        }
        return;
    }

    /**
     * TagLib库解析
     * @access public
     * @param string $tagLib 要解析的标签库
     * @param string $content 要解析的模板内容
     * @param boolen $hide 是否隐藏标签库前缀
     * @return string
     */
    public function parseTagLib($tagLib, &$content, $hide = false) {
        $begin = $this->config['taglib_begin'];
        $end = $this->config['taglib_end'];
        $className = 'TagLib' . ucwords($tagLib);
        $tLib = Think::instance($className);
        foreach ($tLib->getTags() as $name => $val) {
            $tags = array($name);
            if (isset($val['alias'])) {// 别名设置
                $tags = explode(',', $val['alias']);
                $tags[] = $name;
            }
            $level = isset($val['level']) ? $val['level'] : 1;
            $closeTag = isset($val['close']) ? $val['close'] : true;
            foreach ($tags as $tag) {
                $parseTag = !$hide ? $tagLib . ':' . $tag : $tag; // 实际要解析的标签名称
                if (!method_exists($tLib, '_' . $tag)) {
                    // 别名可以无需定义解析方法
                    $tag = $name;
                }
                $n1 = empty($val['attr']) ? '(\s*?)' : '\s([^' . $end . ']*)';
                if (!$closeTag) {
                    $patterns = '/' . $begin . $parseTag . $n1 . '\/(\s*?)' . $end . '/is';
                    $replacement = "\$this->parseXmlTag('$tagLib','$tag','$1','')";
                    //$content = preg_replace($patterns, $replacement, $content);
                    $content = preg_replace_callback($patterns, function($r) use ($tagLib,$tag) {
                        return $this->parseXmlTag($tagLib, $tag, $r[1], '');
                    },$content);
                } else {
                    $patterns = '/' . $begin . $parseTag . $n1 . $end . '(.*?)' . $begin . '\/' . $parseTag . '(\s*?)' . $end . '/is';
                    $replacement = "\$this->parseXmlTag('$tagLib','$tag','$1','$2')";
                    for ($i = 0; $i < $level; $i++)
                    //$content=preg_replace($patterns,$replacement,$content);
                        $content = preg_replace_callback($patterns,  function($r) use($tagLib,$tag) {
                            return $this->parseXmlTag($tagLib, $tag, $r[1], $r[2]);
                        },$content);
                }
            }
        }
    }

    /**
     * 解析标签库的标签
     * 需要调用对应的标签库文件解析类
     * @access public
     * @param string $tagLib  标签库名称
     * @param string $tag  标签名
     * @param string $attr  标签属性
     * @param string $content  标签内容
     * @return string|false
     */
    public function parseXmlTag($tagLib, $tag, $attr, $content) {
        //if (MAGIC_QUOTES_GPC) {
        $attr = stripslashes($attr);
        $content = stripslashes($content);
        //}
        if (ini_get('magic_quotes_sybase'))
            $attr = str_replace('\"', '\'', $attr);
        $tLib = Think::instance('TagLib' . ucwords(strtolower($tagLib)));
        $parse = '_' . $tag;
        $content = trim($content);
        return $tLib->$parse($attr, $content);
    }

    /**
     * 模板标签解析
     * 格式： {TagName:args [|content] }
     * @access public
     * @param string $tagStr 标签内容
     * @return string
     */
    public function parseTag($tagStr) {
        //if (MAGIC_QUOTES_GPC) {
        $tagStr = stripslashes($tagStr);
        //}
        //还原非模板标签
        if (preg_match('/^[\s|\d]/is', $tagStr))
        //过滤空格和数字打头的标签
            return C('TMPL_L_DELIM') . $tagStr . C('TMPL_R_DELIM');
        $flag = substr($tagStr, 0, 1);
        $flag2 = substr($tagStr, 1, 1);
        $name = substr($tagStr, 1);
        if ('$' == $flag && '.' != $flag2 && '(' != $flag2) { //解析模板变量 格式 {$varName}
            return $this->parseVar($name);
        } elseif ('-' == $flag || '+' == $flag) { // 输出计算
            return '<?php echo ' . $flag . $name . ';?>';
        } elseif (':' == $flag) { // 输出某个函数的结果
            return '<?php echo ' . $name . ';?>';
        } elseif ('~' == $flag) { // 执行某个函数
            return '<?php ' . $name . ';?>';
        } elseif (substr($tagStr, 0, 2) == '//' || (substr($tagStr, 0, 2) == '/*' && substr($tagStr, -2) == '*/')) {
            //注释标签
            return '';
        }
        // 未识别的标签直接返回
        return C('TMPL_L_DELIM') . $tagStr . C('TMPL_R_DELIM');
    }

    /**
     * 模板变量解析,支持使用函数
     * 格式： {$varname|function1|function2=arg1,arg2}
     * @access public
     * @param string $varStr 变量数据
     * @return string
     */
    public function parseVar($varStr) {
        $varStr = trim($varStr);
        static $_varParseList = array();
        //如果已经解析过该变量字串，则直接返回变量值
        if (isset($_varParseList[$varStr]))
            return $_varParseList[$varStr];
        $parseStr = '';
        $varExists = true;
        if (!empty($varStr)) {
            $varArray = explode('|', $varStr);
            //取得变量名称
            $var = array_shift($varArray);
            if ('Think.' == substr($var, 0, 6)) {
                // 所有以Think.打头的以特殊变量对待 无需模板赋值就可以输出
                $name = $this->parseThinkVar($var);
            } elseif (false !== strpos($var, '.')) {
                //支持 {$var.property}
                $vars = explode('.', $var);
                $var = array_shift($vars);
                switch (strtolower(C('TMPL_VAR_IDENTIFY'))) {
                    case 'array': // 识别为数组
                        $name = '$' . $var;
                        foreach ($vars as $key => $val)
                            $name .= '["' . $val . '"]';
                        break;
                    case 'obj':  // 识别为对象
                        $name = '$' . $var;
                        foreach ($vars as $key => $val)
                            $name .= '->' . $val;
                        break;
                    default:  // 自动判断数组或对象 只支持二维
                        $name = 'is_array($' . $var . ')?$' . $var . '["' . $vars[0] . '"]:$' . $var . '->' . $vars[0];
                }
            } elseif (false !== strpos($var, '[')) {
                //支持 {$var['key']} 方式输出数组
                $name = "$" . $var;
                preg_match('/(.+?)\[(.+?)\]/is', $var, $match);
                $var = $match[1];
            } elseif (false !== strpos($var, ':') && false === strpos($var, '(') && false === strpos($var, '::') && false === strpos($var, '?')) {
                //支持 {$var:property} 方式输出对象的属性
                $vars = explode(':', $var);
                $var = str_replace(':', '->', $var);
                $name = "$" . $var;
                $var = $vars[0];
            } else {
                $name = "$$var";
            }
            //对变量使用函数
            if (count($varArray) > 0)
                $name = $this->parseVarFunction($name, $varArray);
            $parseStr = '<?php echo (' . $name . '); ?>';
        }
        $_varParseList[$varStr] = $parseStr;
        return $parseStr;
    }

    /**
     * 对模板变量使用函数
     * 格式 {$varname|function1|function2=arg1,arg2}
     * @access public
     * @param string $name 变量名
     * @param array $varArray  函数列表
     * @return string
     */
    public function parseVarFunction($name, $varArray) {
        //对变量使用函数
        $length = count($varArray);
        //取得模板禁止使用函数列表
        $template_deny_funs = explode(',', C('TMPL_DENY_FUNC_LIST'));
        for ($i = 0; $i < $length; $i++) {
            $args = explode('=', $varArray[$i], 2);
            //模板函数过滤
            $fun = strtolower(trim($args[0]));
            switch ($fun) {
                case 'default':  // 特殊模板函数
                    $name = '(' . $name . ')?(' . $name . '):' . $args[1];
                    break;
                default:  // 通用模板函数
                    if (!in_array($fun, $template_deny_funs)) {
                        if (isset($args[1])) {
                            if (strstr($args[1], '###')) {
                                $args[1] = str_replace('###', $name, $args[1]);
                                $name = "$fun($args[1])";
                            } else {
                                $name = "$fun($name,$args[1])";
                            }
                        } else if (!empty($args[0])) {
                            $name = "$fun($name)";
                        }
                    }
            }
        }
        return $name;
    }

    /**
     * 特殊模板变量解析
     * 格式 以 $Think. 打头的变量属于特殊模板变量
     * @access public
     * @param string $varStr  变量字符串
     * @return string
     */
    public function parseThinkVar($varStr) {
        $vars = explode('.', $varStr);
        $vars[1] = strtoupper(trim($vars[1]));
        $parseStr = '';
        if (count($vars) >= 3) {
            $vars[2] = trim($vars[2]);
            switch ($vars[1]) {
                case 'SERVER':
                    $parseStr = '$_SERVER[\'' . strtoupper($vars[2]) . '\']';
                    break;
                case 'GET':
                    $parseStr = '$_GET[\'' . $vars[2] . '\']';
                    break;
                case 'POST':
                    $parseStr = '$_POST[\'' . $vars[2] . '\']';
                    break;
                case 'COOKIE':
                    if (isset($vars[3])) {
                        $parseStr = '$_COOKIE[\'' . $vars[2] . '\'][\'' . $vars[3] . '\']';
                    } else {
                        $parseStr = 'cookie(\'' . $vars[2] . '\')';
                    }
                    break;
                case 'SESSION':
                    if (isset($vars[3])) {
                        $parseStr = '$_SESSION[\'' . $vars[2] . '\'][\'' . $vars[3] . '\']';
                    } else {
                        $parseStr = 'session(\'' . $vars[2] . '\')';
                    }
                    break;
                case 'ENV':
                    $parseStr = '$_ENV[\'' . strtoupper($vars[2]) . '\']';
                    break;
                case 'REQUEST':
                    $parseStr = '$_REQUEST[\'' . $vars[2] . '\']';
                    break;
                case 'CONST':
                    $parseStr = strtoupper($vars[2]);
                    break;
                case 'LANG':
                    $parseStr = 'L("' . $vars[2] . '")';
                    break;
                case 'CONFIG':
                    if (isset($vars[3])) {
                        $vars[2] .= '.' . $vars[3];
                    }
                    $parseStr = 'C("' . $vars[2] . '")';
                    break;
                default:break;
            }
        } else if (count($vars) == 2) {
            switch ($vars[1]) {
                case 'NOW':
                    $parseStr = "date('Y-m-d g:i a',time())";
                    break;
                case 'VERSION':
                    $parseStr = 'THINK_VERSION';
                    break;
                case 'TEMPLATE':
                    $parseStr = "'" . $this->templateFile . "'"; //'C("TEMPLATE_NAME")';
                    break;
                case 'LDELIM':
                    $parseStr = 'C("TMPL_L_DELIM")';
                    break;
                case 'RDELIM':
                    $parseStr = 'C("TMPL_R_DELIM")';
                    break;
                default:
                    if (defined($vars[1]))
                        $parseStr = $vars[1];
            }
        }
        return $parseStr;
    }

    /**
     * 加载公共模板并缓存 和当前模板在同一路径，否则使用相对路径
     * @access private
     * @param string $tmplPublicName  公共模板文件名
     * @param array $vars  要传递的变量列表
     * @return string
     */
    private function parseIncludeItem($tmplPublicName, $vars = array()) {
        // 分析模板文件名并读取内容
        $parseStr = $this->parseTemplateName($tmplPublicName);
        // 替换变量
        foreach ($vars as $key => $val) {
            $parseStr = str_replace('[' . $key . ']', $val, $parseStr);
        }
        // 再次对包含文件进行模板分析
        return $this->parseInclude($parseStr);
    }

    /**
     * 分析加载的模板文件并读取内容 支持多个模板文件读取
     * @access private
     * @param string $tmplPublicName  模板文件名
     * @return string
     */
    private function parseTemplateName($templateName) {
        if (substr($templateName, 0, 1) == '$')
        //支持加载变量文件名
            $templateName = $this->get(substr($templateName, 1));
        $array = explode(',', $templateName);
        $parseStr = '';
        foreach ($array as $templateName) {
            if (false === strpos($templateName, $this->config['template_suffix'])) {
                // 解析规则为 分组@模板主题:模块:操作
                if (strpos($templateName, '@')) {
                    list($group, $templateName) = explode('@', $templateName);
                    if (1 == C('APP_GROUP_MODE')) {
                        $basePath = dirname(BASE_LIB_PATH) . '/' . $group . '/' . basename(TMPL_PATH) . '/' . (THEME_NAME ? THEME_NAME . '/' : '');
                    } else {
                        $basePath = TMPL_PATH . '/' . $group . '/' . (THEME_NAME ? THEME_NAME . '/' : '');
                    }
                } else {
                    $basePath = THEME_PATH;
                }
                $templateName = str_replace(':', '/', $templateName);
                $path = explode('/', $templateName);
                $action = array_pop($path);
                $module = !empty($path) ? array_pop($path) : MODULE_NAME;
                if (!empty($path)) {// 设置模板主题
                    $basePath = dirname($basePath) . '/' . array_pop($path) . '/';
                }
                $templateName = $basePath . $module . C('TMPL_FILE_DEPR') . $action . $this->config['template_suffix'];
            }
            // 获取模板文件内容
            $parseStr .= file_get_contents($templateName);
        }
        return $parseStr;
    }

}
