energylink/panels/bettermap/module.js

/*jshint globalstrict:true */
/*global angular:true */
/*global L:false*/
/*

  ## Better maps

  ### Parameters
  * size :: How many results to show, more results = slower
  * field :: field containing a 2 element array in the format [lon,lat]
  * tooltip :: field to extract the tool tip value from
  * spyable :: Show the 'eye' icon that reveals the last ES query
*/

'use strict';

angular.module('kibana.bettermap', [])
.controller('bettermap', function($scope, querySrv, dashboard, filterSrv) {

  $scope.panelMeta = {
    status  : "Experimental",
    description : "Displays geo points in clustered groups on a map. The cavaet for this panel is"+
      " that, for better or worse, it does NOT use the terms facet and it <b>does</b> query "+
      "sequentially. This however means that it transfers more data and is generally heavier to"+
      " compute, while showing less actual data. If you have a time filter, it will attempt to"+
      " show to most recent points in your search, up to your defined limit"
  };

  // Set and populate defaults
  var _d = {
    queries     : {
      mode        : 'all',
      ids         : []
    },
    size    : 1000,
    spyable : true,
    tooltip : "_id",
    field   : null
  };
  _.defaults($scope.panel,_d);

  $scope.init = function() {
    $scope.$on('refresh',function(){
      $scope.get_data();
    });
    $scope.get_data();
  };

  $scope.get_data = function(segment,query_id) {
    $scope.panel.error =  false;

    // Make sure we have everything for the request to complete
    if(dashboard.indices.length === 0) {
      return;
    }

    if(_.isUndefined($scope.panel.field)) {
      $scope.panel.error = "Please select a field that contains geo point in [lon,lat] format";
      return;
    }
    
    // Determine the field to sort on
    var timeField = _.uniq(_.pluck(filterSrv.getByType('time'),'field'));
    if(timeField.length > 1) {
      $scope.panel.error = "Time field must be consistent amongst time filters";
    } else if(timeField.length === 0) {
      timeField = null;
    } else {
      timeField = timeField[0];
    }

    var _segment = _.isUndefined(segment) ? 0 : segment;

    $scope.panel.queries.ids = querySrv.idsByMode($scope.panel.queries);
    // This could probably be changed to a BoolFilter 
    var boolQuery = $scope.ejs.BoolQuery();
    _.each($scope.panel.queries.ids,function(id) {
      boolQuery = boolQuery.should(querySrv.getEjsObj(id));
    });

    var request = $scope.ejs.Request().indices(dashboard.indices[_segment])
      .query($scope.ejs.FilteredQuery(
        boolQuery,
        filterSrv.getBoolFilter(filterSrv.ids).must($scope.ejs.ExistsFilter($scope.panel.field))
      ))
      .fields([$scope.panel.field,$scope.panel.tooltip])
      .size($scope.panel.size);

    if(!_.isNull(timeField)) {
      request = request.sort(timeField,'desc');
    }

    $scope.populate_modal(request);

    var results = request.doSearch();

    // Populate scope when we have results
    results.then(function(results) {
      $scope.panelMeta.loading = false;

      if(_segment === 0) {
        $scope.hits = 0;
        $scope.data = [];
        query_id = $scope.query_id = new Date().getTime();
      }

      // Check for error and abort if found
      if(!(_.isUndefined(results.error))) {
        $scope.panel.error = $scope.parse_error(results.error);
        return;
      }

      // Check that we're still on the same query, if not stop
      if($scope.query_id === query_id) {

        var scripts = $LAB.script("panels/bettermap/lib/leaflet.js").wait();

        scripts.wait(function(){
          $scope.data = $scope.data.concat(_.map(results.hits.hits, function(hit) {
            return {
              coordinates : new L.LatLng(hit.fields[$scope.panel.field][1],hit.fields[$scope.panel.field][0]),
              tooltip : hit.fields[$scope.panel.tooltip]
            };
          }));
        });
        // Keep only what we need for the set
        $scope.data = $scope.data.slice(0,$scope.panel.size);

      } else {
        return;
      }
  
      $scope.$emit('draw');

      // Get $size results then stop querying
      if($scope.data.length < $scope.panel.size && _segment+1 < dashboard.indices.length) {
        $scope.get_data(_segment+1,$scope.query_id);
      }

    });
  };

  $scope.populate_modal = function(request) {
    $scope.inspector = angular.toJson(JSON.parse(request.toString()),true);
  };

})
.directive('bettermap', function() {
  return {
    restrict: 'A',
    link: function(scope, elem, attrs) {

      elem.html('<center><img src="common/img/load_big.gif"></center>');

      // Receive render events
      scope.$on('draw',function(){
        render_panel();
      });

      scope.$on('render', function(){
        if(!_.isUndefined(map)) {
          map.invalidateSize();
          var panes = map.getPanes();
        }
      });

      var map, markers, layerGroup, mcg;

      function render_panel() { 
        scope.panelMeta.loading = false;

        var scripts = $LAB.script("panels/bettermap/lib/leaflet.js").wait()
          .script("panels/bettermap/lib/plugins.js");
   
        //add markers dynamically
        scripts.wait(function(){
          if(_.isUndefined(map)) {
            map = L.map(attrs.id, {
              scrollWheelZoom: false,
              center: [40, -86],
              zoom: 10
            });

            L.tileLayer('http://{s}.tile.cloudmade.com/57cbb6ca8cac418dbb1a402586df4528/22677/256/{z}/{x}/{y}.png', {
              maxZoom: 18,
              minZoom: 2
            }).addTo(map);
            layerGroup = new L.MarkerClusterGroup({maxClusterRadius:30});
          } else {
            layerGroup.clearLayers();
          }

          _.each(scope.data, function(p) {
            if(!_.isUndefined(p.tooltip) && p.tooltip !== '') {
              layerGroup.addLayer(L.marker(p.coordinates).bindLabel(p.tooltip));
            } else {
              layerGroup.addLayer(L.marker(p.coordinates));
            }
          });

          layerGroup.addTo(map);

          map.fitBounds(_.pluck(scope.data,'coordinates'));
        });
      }
    }
  };
});