Starting a basic implementation of the Cart/CurrentOrder so we know whether it's empty

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

@@ -0,0 +1,2 @@
+Darkswarm.controller "CartCtrl", ($scope, CurrentOrder) ->
+  $scope.CurrentOrder = CurrentOrder

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

@@ -1,10 +1,11 @@
-Darkswarm.directive "ofnEmptiesCart", (CurrentHub, Navigation) ->
+Darkswarm.directive "ofnEmptiesCart", (CurrentHub, CurrentOrder, Navigation) ->
   restrict: "A"
   scope:
     hub: '=ofnEmptiesCart'
   template: "{{action}} <strong>{{hub.name}}</strong>"
   link: (scope, elm, attr)-> 
-    if CurrentHub.id and CurrentHub.id isnt scope.hub.id
+    # A hub is selected, we're changing to a different hub, and the cart isn't empty
+    if CurrentHub.id and CurrentHub.id isnt scope.hub.id and not CurrentOrder.empty()
       scope.action = attr.change
       elm.bind 'click', (ev)->
         ev.preventDefault()
@@ -12,5 +13,3 @@ Darkswarm.directive "ofnEmptiesCart", (CurrentHub, Navigation) ->
           Navigation.go scope.hub.path 
     else
       scope.action = attr.shop
-
-

app/assets/javascripts/darkswarm/services/current_order.js.coffee

@@ -0,0 +1,7 @@
+Darkswarm.factory 'CurrentOrder', (currentOrder) ->
+  new class CurrentOrder
+    constructor: ->
+        @[k] = v for k, v of currentOrder
+    
+    empty: =>
+      @line_items.length == 0

app/views/json/_current_order.rabl

@@ -0,0 +1,13 @@
+object current_order
+attributes :id, :item_total
+
+if current_order
+  child line_items: :line_items do
+    attributes :id, :variant_id, :quantity, :price 
+  end
+
+  node :cart_count do
+    cart_count
+  end
+end
+

app/views/layouts/darkswarm.html.haml

@@ -16,6 +16,7 @@
 
   %body.off-canvas{"ng-app" => "Darkswarm"}
     = inject_json "currentHub", "current_hub"
+    = inject_json "currentOrder", "current_order"
     = inject_json "user", "current_user"
 
     .off-canvas-wrap{offcanvas: true}

app/views/shared/menu/_cart.html.haml

@@ -0,0 +1,5 @@
+%a.icon{href: cart_url, "ng-controller" => "CartCtrl"}
+  %i.fi-shopping-cart.nav-branded 
+    %span
+      {{ CurrentOrder.cart_count }}
+      items

app/views/shared/menu/_large_menu.html.haml

@@ -43,8 +43,4 @@
           %span.nav-primary.nav-branded {{ CurrentHub.name }}
       %li.divider
       %li.cart
-        %a.icon{href: cart_url}
-          %i.fi-shopping-cart.nav-branded 
-            %span
-              = cart_count
-              items
+        = render partial: "shared/menu/cart"

app/views/shared/menu/_mobile_menu.html.haml

@@ -3,11 +3,7 @@
     %a.left-off-canvas-toggle.menu-icon
       %span 
   %section.right
-    %a.nav-branded.icon{href: cart_url}
-      %i.fi-shopping-cart 
-        %span
-          = cart_count
-          items
+    = render partial: "shared/menu/cart"
     %a{href: main_app.shop_path}
       {{ CurrentHub.name }}