driver/server

Server side filtering

Implementation of a dataset backed by a server, which in turn uses fi. postgreSQL Fully asynchronous, based on socketIO.

Most methods below result in a message with the methodName and a data object, containing:

  • datasets and dataview, or dataset
  • filterId or facetId

Data can be requested using the dataview.getData() method responds with a newData message containing filterId and data.

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Methods

(inner) getData(dataview) → {Promise}

Get data for every filter, and trigger a 'newData' event

Returns a Promise that resolves to the dataview when all data and metadata has been updated

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Parameters:
Name Type Description
dataview Dataview
Returns:
Type:
Promise

(inner) initDataFilter(dataview, filter)

Initialize the data filter, and construct the getData callback function on the filter.

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Parameters:
Name Type Description
dataview Dataview
filter Filter

(inner) releaseDataFilter(filter)

The opposite or initDataFilter, it should remove the filter and deallocate other configuration related to the filter.

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Parameters:
Name Type Description
filter Filter

(inner) scan(dataset)

Autoconfigure a dataset

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Parameters:
Name Type Description
dataset Dataset

(inner) setCategories(dataset, facet)

setCategories finds finds all values on an ordinal (categorial) axis Updates the categorialTransform of the facet

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Parameters:
Name Type Description
dataset Dataset
facet Facet

(inner) setMinMax(dataset, facet)

setMinMax sets the range of a continuous or time facet

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Parameters:
Name Type Description
dataset Dataset
facet Facet

(inner) setPercentiles(dataset, facet)

Calculate 100 percentiles (ie. 1,2,3,4 etc.), and initialize the facet.continuousTransform

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Parameters:
Name Type Description
dataset Dataset
facet Facet

(inner) updateDataFilter(filter)

Change the filter parameters for an initialized filter

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Parameters:
Name Type Description
filter Filter