widget.facetviewer.js

/*jshint multistr:true */

this.recline = this.recline || {};
this.recline.View = this.recline.View || {};

(function($, my) {

my.FacetViewer = Backbone.View.extend({
  className: 'recline-facet-viewer well', 
  template: ' \
    <a class="close js-hide" href="#">&times;</a> \
    <div class="facets row"> \
      <div class="span1"> \
        <h3>Facets</h3> \
      </div> \
      {{#facets}} \
      <div class="facet-summary span2 dropdown" data-facet="{{id}}"> \
        <a class="btn dropdown-toggle" data-toggle="dropdown" href="#"><i class="icon-chevron-down"></i> {{id}} {{label}}</a> \
        <ul class="facet-items dropdown-menu"> \
        {{#terms}} \
          <li><a class="facet-choice js-facet-filter" data-value="{{term}}">{{term}} ({{count}})</a></li> \
        {{/terms}} \
        {{#entries}} \
          <li><a class="facet-choice js-facet-filter" data-value="{{time}}">{{term}} ({{count}})</a></li> \
        {{/entries}} \
        </ul> \
      </div> \
      {{/facets}} \
    </div> \
  ',

  events: {
    'click .js-hide': 'onHide',
    'click .js-facet-filter': 'onFacetFilter'
  },
  initialize: function(model) {
    _.bindAll(this, 'render');
    this.el = $(this.el);
    this.model.facets.bind('all', this.render);
    this.model.fields.bind('all', this.render);
    this.render();
  },
  render: function() {
    var tmplData = {
      facets: this.model.facets.toJSON(),
      fields: this.model.fields.toJSON()
    };
    tmplData.facets = _.map(tmplData.facets, function(facet) {
      if (facet._type === 'date_histogram') {
        facet.entries = _.map(facet.entries, function(entry) {
          entry.term = new Date(entry.time).toDateString();
          return entry;
        });
      }
      return facet;
    });
    var templated = Mustache.render(this.template, tmplData);
    this.el.html(templated);

    if (this.model.facets.length > 0) {
      this.el.show();
    } else {
      this.el.hide();
    }
  },
  onHide: function(e) {
    e.preventDefault();
    this.el.hide();
  },
  onFacetFilter: function(e) {
    var $target= $(e.target);
    var fieldId = $target.closest('.facet-summary').attr('data-facet');
    var value = $target.attr('data-value');
    this.model.queryState.addTermFilter(fieldId, value);
  }
});


})(jQuery, recline.View);