handle ajax errors (closes foodcoops#300)

Conflicts:
	app/assets/javascripts/application.js

app/assets/javascripts/application.js

@@ -136,26 +136,15 @@ $(function() {
         return false;
     });
 
-    // Show and hide loader on ajax callbacks
-    //   and run newElementsReady() afterwards for new dom elements
-    $(document).on('ajax:beforeSend', '[data-remote]', function(evt, xhr, settings) {
-        $('#loader').show();
-        // One idea was $(document).on('ajax:complete', '[data-remote'], ...)
-        // but that doesn't work for a modal dialog that replaces itself.
-        //   https://github.com/rails/jquery-ujs/issues/223
-        if (!settings.complete)
-          settings.complete = [];
-        else if (!$.isArray(settings.complete))
-          settings.complete = [settings.complete];
-        settings.complete.push(function() {
-            newElementsReady();
-            $('#loader').hide();
-        });
-    });
-
-    // Disable submit button on ajax forms
-    $(document).on('ajax:beforeSend', 'form[data-remote]', function() {
-        $(this).children('input[type="submit"]').attr('disabled', 'disabled');
+    // Handle ajax errors
+    //     render json: {error: "can't except this!"}, status: :unprocessable_entity
+    $(document).ajaxError(function(ev, xhr, settings, exception) {
+        try {
+            msg = xhr.responseJSON.error;
+        } catch(err) {
+            msg = I18n.t('errors.general');
+        }
+        alert(msg);
     });
 
     // The autocomplete attribute is used for both autocompletion and storing

config/i18n-js.yml

@@ -3,6 +3,7 @@ translations:
 - file: 'app/assets/javascripts/i18n/translations.js'
   only: [
    '*.js.*',
+   '*.errors.*',
    '*.number.*',
    '*.date.formats.*',
    # foodsoft-specific texts to keep js with normal translations