Split directive into functions

app/assets/javascripts/darkswarm/directives/map_search.js.coffee

@@ -1,18 +1,27 @@
-Darkswarm.directive 'mapSearch', ($timeout)->
+Darkswarm.directive 'mapSearch', ($timeout) ->
   # Install a basic search field in a map
   restrict: 'E'
   require: '^googleMap'
   replace: true
   template: '<input id="pac-input" placeholder="' + t('location_placeholder') + '"></input>'
-  link: (scope, elem, attrs, ctrl)->
+  scope: {}
+  link: (scope, elem, attrs, ctrl) ->
     $timeout =>
       map = ctrl.getMap()
 
-      # Use OSM tiles server
-      map.mapTypes.set 'OSM', new (google.maps.ImageMapType)(
+      # Does this *really* belong here? It's not about search.
+      scope.useOsmTiles map
+
+      searchBox = scope.createSearchBox map
+      scope.respondToSearch map, searchBox
+      scope.biasResults map, searchBox
+
+
+    scope.useOsmTiles = (map) ->
+      map.mapTypes.set 'OSM', new google.maps.ImageMapType
         getTileUrl: (coord, zoom) ->
           # "Wrap" x (logitude) at 180th meridian properly
-          # NB: Don't touch coord.x because coord param is by reference, and changing its x property breakes something in Google's lib
+          # NB: Don't touch coord.x because coord param is by reference, and changing its x property breaks something in Google's lib
           tilesPerGlobe = 1 << zoom
           x = coord.x % tilesPerGlobe
           if x < 0
@@ -21,19 +30,22 @@ Darkswarm.directive 'mapSearch', ($timeout)->
           'http://tile.openstreetmap.org/' + zoom + '/' + x + '/' + coord.y + '.png'
         tileSize: new (google.maps.Size)(256, 256)
         name: 'OpenStreetMap'
-        maxZoom: 18)
+        maxZoom: 18
 
-      input = (document.getElementById("pac-input"))
+    scope.createSearchBox = (map) ->
+      input = document.getElementById("pac-input")
       map.controls[google.maps.ControlPosition.TOP_LEFT].push input
-      searchBox = new google.maps.places.SearchBox((input))
+      return new google.maps.places.SearchBox(input)
 
+    scope.respondToSearch = (map, searchBox) ->
       google.maps.event.addListener searchBox, "places_changed", ->
         places = searchBox.getPlaces()
         for place in places when place.geometry.viewport?
           map.fitBounds place.geometry.viewport
 
-      # Bias the SearchBox results towards places that are within the bounds of the
-      # current map's viewport.
+    # Bias the SearchBox results towards places that are within the bounds of the
+    # current map's viewport.
+    scope.biasResults = (map, searchBox) ->
       google.maps.event.addListener map, "bounds_changed", ->
         bounds = map.getBounds()
         searchBox.setBounds bounds