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# widget.filtereditor.js |
--- | ---
¶ |
    /*jshint multistr:true */

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

    (function($, my) {

    my.FilterEditor = Backbone.View.extend({
      className: 'recline-filter-editor well',
      template: ' \
        <div class="filters"> \
          <h3>Filters</h3> \
          <a href="#" class="js-add-filter">Add filter</a> \
          <form class="form-stacked js-add" style="display: none;"> \
            <fieldset> \
              <label>Field</label> \
              <select class="fields"> \
                {{#fields}} \
                <option value="{{id}}">{{label}}</option> \
                {{/fields}} \
              </select> \
              <label>Filter type</label> \
              <select class="filterType"> \
                <option value="term">Value</option> \
                <option value="range">Range</option> \
                <option value="geo_distance">Geo distance</option> \
              </select> \
              <button type="submit" class="btn">Add</button> \
            </fieldset> \
          </form> \
          <form class="form-stacked js-edit"> \
            {{#filters}} \
              {{{filterRender}}} \
            {{/filters}} \
            {{#filters.length}} \
            <button type="submit" class="btn">Update</button> \
            {{/filters.length}} \
          </form> \
        </div> \
      ',
      filterTemplates: {
        term: ' \
          <div class="filter-{{type}} filter"> \
            <fieldset> \
              <legend> \
                {{field}} <small>{{type}}</small> \
                <a class="js-remove-filter" href="#" title="Remove this filter" data-filter-id="{{id}}">&times;</a> \
              </legend> \
              <input type="text" value="{{term}}" name="term" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
            </fieldset> \
          </div> \
        ',
        range: ' \
          <div class="filter-{{type}} filter"> \
            <fieldset> \
              <legend> \
                {{field}} <small>{{type}}</small> \
                <a class="js-remove-filter" href="#" title="Remove this filter" data-filter-id="{{id}}">&times;</a> \
              </legend> \
              <label class="control-label" for="">From</label> \
              <input type="text" value="{{start}}" name="start" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
              <label class="control-label" for="">To</label> \
              <input type="text" value="{{stop}}" name="stop" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
            </fieldset> \
          </div> \
        ',
        geo_distance: ' \
          <div class="filter-{{type}} filter"> \
            <fieldset> \
              <legend> \
                {{field}} <small>{{type}}</small> \
                <a class="js-remove-filter" href="#" title="Remove this filter" data-filter-id="{{id}}">&times;</a> \
              </legend> \
              <label class="control-label" for="">Longitude</label> \
              <input type="text" value="{{point.lon}}" name="lon" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
              <label class="control-label" for="">Latitude</label> \
              <input type="text" value="{{point.lat}}" name="lat" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
              <label class="control-label" for="">Distance (km)</label> \
              <input type="text" value="{{distance}}" name="distance" data-filter-field="{{field}}" data-filter-id="{{id}}" data-filter-type="{{type}}" /> \
            </fieldset> \
          </div> \
        '
      },
      events: {
        'click .js-remove-filter': 'onRemoveFilter',
        'click .js-add-filter': 'onAddFilterShow',
        'submit form.js-edit': 'onTermFiltersUpdate',
        'submit form.js-add': 'onAddFilter'
      },
      initialize: function() {
        this.el = $(this.el);
        _.bindAll(this, 'render');
        this.model.fields.bind('all', this.render);
        this.model.queryState.bind('change', this.render);
        this.model.queryState.bind('change:filters:new-blank', this.render);
        this.render();
      },
      render: function() {
        var self = this;
        var tmplData = $.extend(true, {}, this.model.queryState.toJSON());
¶ we will use idx in list as there id ... |
        tmplData.filters = _.map(tmplData.filters, function(filter, idx) {
          filter.id = idx;
          return filter;
        });
        tmplData.fields = this.model.fields.toJSON();
        tmplData.filterRender = function() {
          return Mustache.render(self.filterTemplates[this.type], this);
        };
        var out = Mustache.render(this.template, tmplData);
        this.el.html(out);
      },
      onAddFilterShow: function(e) {
        e.preventDefault();
        var $target = $(e.target);
        $target.hide();
        this.el.find('form.js-add').show();
      },
      onAddFilter: function(e) {
        e.preventDefault();
        var $target = $(e.target);
        $target.hide();
        var filterType = $target.find('select.filterType').val();
        var field      = $target.find('select.fields').val();
        this.model.queryState.addFilter({type: filterType, field: field});
      },
      onRemoveFilter: function(e) {
        e.preventDefault();
        var $target = $(e.target);
        var filterId = $target.attr('data-filter-id');
        this.model.queryState.removeFilter(filterId);
      },
      onTermFiltersUpdate: function(e) {
       var self = this;
        e.preventDefault();
        var filters = self.model.queryState.get('filters');
        var $form = $(e.target);
        _.each($form.find('input'), function(input) {
          var $input = $(input);
          var filterType  = $input.attr('data-filter-type');
          var fieldId     = $input.attr('data-filter-field');
          var filterIndex = parseInt($input.attr('data-filter-id'), 10);
          var name        = $input.attr('name');
          var value       = $input.val();

          switch (filterType) {
            case 'term':
              filters[filterIndex].term = value;
              break;
            case 'range':
              filters[filterIndex][name] = value;
              break;
            case 'geo_distance':
              if(name === 'distance') {
                filters[filterIndex].distance = parseFloat(value);
              }
              else {
                filters[filterIndex].point[name] = parseFloat(value);
              }
              break;
          }
        });
        self.model.queryState.set({filters: filters, from: 0});
        self.model.queryState.trigger('change');
      }
    });

    })(jQuery, recline.View);