From 81b1549d11b4a0fa787212dde9f41e640fa9abac Mon Sep 17 00:00:00 2001
From: David Gil <dgilperez@gmail.com>
Date: Thu, 10 Sep 2015 16:56:04 +0200
Subject: [PATCH] prevents double submit for form buttons

---
 app/assets/javascripts/application.js         |  1 +
 .../prevent_double_submission.js.coffee       | 28 +++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 app/assets/javascripts/prevent_double_submission.js.coffee

diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 2a7676be9..7f00e0f02 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -33,6 +33,7 @@ var initialize_modules = function() {
   App.Dropdown.initialize();
   App.LocationChanger.initialize();
   App.CheckAllNone.initialize();
+  App.PreventDoubleSubmission.initialize();
 };
 
 $(function(){
diff --git a/app/assets/javascripts/prevent_double_submission.js.coffee b/app/assets/javascripts/prevent_double_submission.js.coffee
new file mode 100644
index 000000000..933ed9e97
--- /dev/null
+++ b/app/assets/javascripts/prevent_double_submission.js.coffee
@@ -0,0 +1,28 @@
+App.PreventDoubleSubmission =
+  disable_button: (button) ->
+    unless button.hasClass('disabled')
+      loading = button.data('loading') ? 'Sending ...'
+      button.addClass('disabled').attr('disabled', 'disabled')
+      button.data('text', button.val())
+      button.val(loading)
+
+  reset_button: (button) ->
+    if button.hasClass('disabled')
+      button_text = button.data('text')
+      button.removeClass('disabled').attr('disabled', null)
+      if button_text
+        button.val(button_text)
+        button.data('text', null)
+
+  initialize: ->
+    $('form').on('submit', event, ->
+      $form = $(this)
+      button = $form.find('.button')
+      App.PreventDoubleSubmission.disable_button(button)
+    ).on('ajax:success', ->
+      $form = $(this)
+      button = $form.find('.button')
+      App.PreventDoubleSubmission.reset_button(button)
+    )
+
+    false