Improve shops performance

app/assets/javascripts/darkswarm/controllers/hub_node_controller.js.coffee

@@ -1,9 +1,37 @@
-Darkswarm.controller "HubNodeCtrl", ($scope, HashNavigation, Navigation, $location, $templateCache, CurrentHub) ->
-  $scope.toggle = (e) ->
-    HashNavigation.toggle $scope.hub.hash if !angular.element(e.target).inheritedData('is-link')
+Darkswarm.controller "HubNodeCtrl", ($scope, HashNavigation, Navigation, $location, $templateCache, CurrentHub, $http) ->
+  $scope.shopfront_loading = false
+  $scope.enterprise_details = []
 
+  # Toggles shopfront tabs open/closed. Fetches enterprise details from the api, diplays them and adds them
+  # to $scope.enterprise_details, or simply displays the details again if previously fetched
+  $scope.toggle = (event) ->
+    if $scope.open()
+      $scope.toggle_tab(event)
+      return
+
+    if $scope.enterprise_details[$scope.hub.id]
+      $scope.hub = $scope.enterprise_details[$scope.hub.id]
+      $scope.toggle_tab(event)
+      return
+
+    $scope.shopfront_loading = true
+    $scope.toggle_tab(event)
+
+    $http.get("/api/enterprises/" + $scope.hub.id + "/shopfront")
+      .success (data) ->
+        $scope.shopfront_loading = false
+        $scope.hub = data
+        $scope.enterprise_details[$scope.hub.id] = $scope.hub
+      .error (data) ->
+        console.error(data)
+
+  $scope.toggle_tab = (event) ->
+    HashNavigation.toggle $scope.hub.hash if !angular.element(event.target).inheritedData('is-link')
+
+  # Returns boolean: pulldown tab is currently open/closed
   $scope.open = ->
     HashNavigation.active $scope.hub.hash
-  
+
+  # Returns boolean: is this hub the hub that the user is currently "shopping" in?
   $scope.current = ->
     $scope.hub.id is CurrentHub.hub.id