universe/src/universe.js

The fastest way to query and explore multivariate datasets

'use strict'

require('./q.serial')

// var Promise = require('q')  // Promise is defined but never used
var _ = require('./lodash')

module.exports = universe

function universe(data, options) {
  var service = {
    options: _.assign({}, options),
    columns: [],
    filters: {},
    dataListeners: [],
    filterListeners: [],
  }

  var cf = require('./crossfilter')(service)
  var filters = require('./filters')(service)

  data = cf.generateColumns(data)

  return cf.build(data)
    .then(function (data) {
      service.cf = data
      return _.assign(service, {
        add: cf.add,
        remove: cf.remove,
        column: require('./column')(service),
        query: require('./query')(service),
        filter: filters.filter,
        filterAll: filters.filterAll,
        applyFilters: filters.applyFilters,
        clear: require('./clear')(service),
        destroy: require('./destroy')(service),
        onDataChange: onDataChange,
        onFilter: onFilter,
      })
    })

  function onDataChange(cb) {
    service.dataListeners.push(cb)
    return function () {
      service.dataListeners.splice(service.dataListeners.indexOf(cb), 1)
    }
  }

  function onFilter(cb) {
    service.filterListeners.push(cb)
    return function () {
      service.filterListeners.splice(service.filterListeners.indexOf(cb), 1)
    }
  }
}