js: add failure callbacks to ajax functions to allow custom

behaviour on failed requests

rhodecode/public/js/src/rhodecode/utils/ajax.js

@@ -36,18 +36,22 b' var toQueryString = function(o) {'
 /**
 * ajax call wrappers
 */
-var ajaxGET = function(url, success) {
+var ajaxGET = function(url, success, failure) {
   var sUrl = url;
   var request = $.ajax({url: sUrl, headers: {'X-PARTIAL-XHR': true}})
   .done(function(data){
     success(data);
   })
-  .fail(function(data, textStatus, xhr){
-    alert("error processing request: " + textStatus);
+  .fail(function(data, textStatus, xhr) {
+    if (failure) {
+      failure(data, textStatus, xhr);
+    } else {
+      alert("error processing request: " + textStatus);
+    }
   });
   return request;
 };
-var ajaxPOST = function(url,postData,success) {
+var ajaxPOST = function(url, postData, success, failure) {
   var sUrl = url;
   var postData = toQueryString(postData);
   var request = $.ajax({type: 'POST', data: postData, url: sUrl,
@@ -56,7 +60,11 b' var ajaxPOST = function(url,postData,suc'
     success(data);
   })
   .fail(function(data, textStatus, xhr){
-    alert("error processing request: " + textStatus);
+    if (failure) {
+      failure(data, textStatus, xhr);
+    } else {
+      alert("error processing request: " + textStatus);
+    }
   });
   return request;
 };