Add support for basemap api keys

Author: ilyankou

scripts/constants.js

@@ -17,6 +17,7 @@ var constants = {
 	_googleAnalytics: 'Google Analytics Tracking ID',
 	// Map Settings
 	_tileProvider: 'Basemap Tiles',
+  _tileProviderApiKey: 'Basemap Tiles API Key',
 	_markercluster: 'Cluster Markers',
   _introPopupText: 'Intro Popup Text',
   _initZoom: 'Initial Zoom',

scripts/map.js

@@ -926,13 +926,23 @@ $(window).on('load', function() {
    * Loads the basemap and adds it to the map
    */
   function addBaseMap() {
+
     var basemap = trySetting('_tileProvider', 'CartoDB.Positron');
+    
     L.tileLayer.provider(basemap, {
-      maxZoom: 18
+      maxZoom: 18,
+
+      // Pass the api key to most commonly used parameters
+      apiKey: trySetting('_tileProviderApiKey', ''),
+      apikey: trySetting('_tileProviderApiKey', ''),
+      key: trySetting('_tileProviderApiKey', ''),
+      accessToken: trySetting('_tileProviderApiKey', '')
     }).addTo(map);
+
     L.control.attribution({
       position: trySetting('_mapAttribution', 'bottomright')
     }).addTo(map);
+
   }
 
   /**