Disable create profile from signup when submitting

This prevents people re-submitting the form multiple times. Although the
backend validates it, we show an ugly alert message that is hard for
users to understand.

app/assets/javascripts/darkswarm/controllers/registration/registration_form_controller.js.coffee

@@ -1,15 +1,23 @@
 Darkswarm.controller "RegistrationFormCtrl", ($scope, RegistrationService, EnterpriseRegistrationService) ->
   $scope.submitted = false
+  $scope.isDisabled = false
 
   $scope.valid = (form) ->
     $scope.submitted = !form.$valid
     form.$valid
 
   $scope.create = (form) ->
-    EnterpriseRegistrationService.create() if $scope.valid(form)
+    $scope.disableButton()
+    EnterpriseRegistrationService.create($scope.enableButton) if $scope.valid(form)
 
   $scope.update = (nextStep, form) ->
     EnterpriseRegistrationService.update(nextStep) if $scope.valid(form)
 
   $scope.selectIfValid = (nextStep, form) ->
     RegistrationService.select(nextStep) if $scope.valid(form)
+
+  $scope.disableButton = ->
+    $scope.isDisabled = true
+
+  $scope.enableButton = ->
+    $scope.isDisabled = false

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

@@ -11,7 +11,7 @@ Darkswarm.factory "EnterpriseRegistrationService", ($http, RegistrationService,
       for key, value of enterpriseAttributes
         @enterprise[key] = value
 
-    create: =>
+    create: (callback) =>
       Loading.message = t('creating') + " " + @enterprise.name
       $http(
         method: "POST"
@@ -25,6 +25,7 @@ Darkswarm.factory "EnterpriseRegistrationService", ($http, RegistrationService,
         @enterprise.id = data
         EnterpriseImageService.configure(@enterprise)
         RegistrationService.select('about')
+        callback.call()
       ).error((data) =>
         Loading.clear()
         if data?.errors?
@@ -32,6 +33,8 @@ Darkswarm.factory "EnterpriseRegistrationService", ($http, RegistrationService,
           alert t('failed_to_create_enterprise') + "\n" + errors.join('\n')
         else
           alert(t('failed_to_create_enterprise_unknown'))
+
+        callback.call()
       )
 
     update: (step) =>

app/views/registration/steps/_type.html.haml

@@ -45,4 +45,4 @@
       .row.buttons
         .small-12.columns
           %input.button.secondary{ type: "button", value: "{{'back' | t}}", ng: { click: "select('contact')" } }
-          %input.button.primary.right{ type: "submit", value: "{{'create_profile' | t}}" }
+          %input.button.primary.right{ ng: { disabled: 'isDisabled' }, type: "submit", value: "{{'create_profile' | t}}" }