Angular directive to embed Tableau dashboards

angular-tableau.js

/* Using this directive is as easy as 1, 2, 3.
  1. Grab the Tableau API JavaScript library as well as this module.
    a. <script src="path/to/tableau-2.0.0.min.js"></script>
    b. <script src="path/to/angular-tableau.js"></script>
  2. Import the module into your app by adding 'angular-tableau' to your dependencies.
  3. Use the directive like this:
        <tableau-viz height="'500px'"
          url="path/to/tableau-dashboard"
          filters={'field1':['item1', 'item2'], 'dateField':{'min':startDate, 'max':endDate}}">
        </tableau-viz>
    a. You can add 'cover' to the directive to prevent the user from interacting with the dashboard.
    b. You can add 'showTabs' and 'showToolbar' to show tabs or the toolbar (hidden by default)
    c. Remember to add width or height, as appropriate for your layout (use the width and height
       attributes on the directive). Not sure which one you need? Try the height setting first.
*/

angular.module("angular-tableau",[])
.value('tableau',tableau)
.directive('tableauViz', ['$q','$interval','tableau',function($q,$interval,tableauApi) {
  return {
    restrict: 'E',
    template:'<div></div><div style="position: absolute; top:0; height:100%; width:100%; opacity: 0;"></div>',
    scope: {
      url: '=',
      height: '=',
      width: '=',
      filters: '='
    },
    link: function(scope,element,attrs) {
      // Just some housekeeping since the browser won't know how to style this element
      element.css('display', 'block');
      element.css('position', 'relative');
      // Set target for viz
      var vizTarget = element[0].children[0];
      var viz;
      // Block user input if cover is specified
      if(!('cover' in attrs)) {
        var cover = angular.element(element[0].children[1]);
        cover.css('display','none');
      }
      // We need to have a URL to do anything
      if(!scope.url) {
        console.log("Error: No URL was specified for Tableau Viz");
        return;
      }
      // Create the dashboard
      function createViz() {
        viz = new tableauApi.Viz(vizTarget, scope.url, {
          'height': scope.height ? scope.height : '100%',
          'width': scope.width ? scope.width : '100%',
          'hideTabs': 'showTabs' in attrs ? false : true,
          'hideToolbar': 'showToolbar' in attrs ? false : true,
          'onFirstInteractive': function() {
            applyFilters();
            scope.$watch('filters', function(newValue, oldValue) {
                applyFilters();
            }, true);
          }
        });
      }
      createViz();
      // We need to rebuild the dashboard periodically to accommodate session timeouts. This is pretty hacky though. :/
      var stop = $interval(function rebuild() {
        viz.dispose();
        createViz();
      }, 300000)
      // Destroy the dashboard and interval timers upon destroying directive.
      scope.$on('$destroy', function() {
        if (viz) viz.dispose();
        if (angular.isDefined(stop)) {
          $interval.cancel(stop);
          stop = undefined;
        }
      });
      // Define a function to apply filters to dashboard
      function applyFilters() {
        var dash = viz.getWorkbook().getActiveSheet();
        var filtersArr = Object.keys(scope.filters);
        for (var i=0; i<filtersArr.length; i++) {
          var filterValue = scope.filters[filtersArr[i]];
          // If it's a dashboard, we need to filter each sheet individually.
          if(dash.getSheetType() === 'dashboard') {
            var sheets = dash.getWorksheets();
            for(var j=0; j<sheets.length; j++) {
              applyFilterToSheet(sheets[j], filtersArr[i], filterValue)
            }
          }
          if(dash.getSheetType() === 'worksheet') {
            applyFilterToSheet(dash, filtersArr[i], filterValue)
          }
        }
      }
      // Define a function to apply filters to individual sheet
      function applyFilterToSheet(sheet, key, filter) {
        if(filter.min && filter.max) {
          // Deal with JavaScript quirk on date objects.
          var postIncrementDate = angular.copy(filter.max);
          postIncrementDate.setDate(postIncrementDate.getDate() + 1);
          sheet.applyRangeFilterAsync(key, {
            min: filter.min,
            max: postIncrementDate
          });
        }
        else {
          sheet.applyFilterAsync(key, filter, tableau.FilterUpdateType.REPLACE)
        }
      }
    }
  };
}])