Disable guest checkout for registered users

app/assets/javascripts/darkswarm/controllers/authentication/login_controller.js.coffee

@@ -1,6 +1,13 @@
 Darkswarm.controller "LoginCtrl", ($scope, $timeout, $location, $http, $window, AuthenticationService, Redirections, Loading) ->
   $scope.path = "/login"
 
+  $scope.modalMessage = null
+
+  $scope.$watch (->
+    AuthenticationService.modalMessage
+  ), (newValue) ->
+    $scope.errors = newValue
+
   $scope.submit = ->
     Loading.message = t 'logging_in'
     $http.post("/user/spree_user/sign_in", {spree_user: $scope.spree_user}).success (data)->

app/assets/javascripts/darkswarm/controllers/checkout/checkout_controller.js.coffee

@@ -1,4 +1,4 @@
-Darkswarm.controller "CheckoutCtrl", ($scope, localStorageService, Checkout, CurrentUser, CurrentHub) ->
+Darkswarm.controller "CheckoutCtrl", ($scope, localStorageService, Checkout, CurrentUser, CurrentHub, AuthenticationService, SpreeUser, $http) ->
   $scope.Checkout = Checkout
   $scope.submitted = false
 
@@ -21,7 +21,26 @@ Darkswarm.controller "CheckoutCtrl", ($scope, localStorageService, Checkout, Cur
   $scope.purchase = (event, form) ->
     event.preventDefault()
     $scope.submitted = true
+
+    if CurrentUser.id
+      $scope.validateForm(form)
+    else
+      $scope.confirmGuest(true)
+
+  $scope.validateForm = (form) ->
     if form.$valid
       $scope.Checkout.purchase()
     else
       $scope.$broadcast 'purchaseFormInvalid', form
+
+  $scope.confirmGuest = ->
+    $http.post("/user/registered_email", {email: $scope.order.email}).success (data)->
+      if data.registered == true
+        $scope.promptLogin()
+      else
+        $scope.validateForm() if $scope.submitted
+
+  $scope.promptLogin = ->
+    SpreeUser.spree_user.email = $scope.order.email
+    AuthenticationService.pushMessage t('devise.failure.already_registered')
+    AuthenticationService.open '/login'

app/assets/javascripts/darkswarm/controllers/checkout/details_controller.js.coffee

@@ -1,8 +1,15 @@
-Darkswarm.controller "DetailsCtrl", ($scope, $timeout) ->
+Darkswarm.controller "DetailsCtrl", ($scope, $timeout, $http, CurrentUser, AuthenticationService, SpreeUser) ->
   angular.extend(this, new FieldsetMixin($scope))
   $scope.name = "details"
   $scope.nextPanel = "billing"
 
+  $scope.login_or_next = (event) ->
+    event.preventDefault()
+    unless CurrentUser.id
+      $scope.confirmGuest()
+
+    $scope.next()
+
   $scope.summary = ->
     [$scope.fullName(),
     $scope.order.email, 

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

@@ -2,6 +2,7 @@ Darkswarm.factory "AuthenticationService", (Navigation, $modal, $location, Redir
 
   new class AuthenticationService
     selectedPath: "/login"
+    modalMessage: null
 
     constructor: ->
       if $location.path() in ["/login", "/signup", "/forgot"] || location.pathname is '/register/auth'
@@ -32,6 +33,8 @@ Darkswarm.factory "AuthenticationService", (Navigation, $modal, $location, Redir
         'registration_authentication.html'
       else
         'authentication.html'
+    pushMessage: (message) ->
+      @modalMessage = String(message)
 
     select: (path)=>
       @selectedPath = path