Initial commit

lib/assets/javascripts/builder/helpers/error-parser.js

@@ -0,0 +1,29 @@
+var _ = require('underscore');
+var DEFAULT_ERROR_MSG = '';
+
+/**
+ *  Return error message when backend request fails
+ *  It tries to get responseText > errors and error arrays, if not gets `statusText`.
+ */
+
+module.exports = function (e) {
+  if (!e) { throw new Error('error is required'); }
+
+  try {
+    var responseText = e.responseText && e.responseText.trim() && JSON.parse(e.responseText);
+    var errorMessage = e.statusText || DEFAULT_ERROR_MSG;
+
+    if (responseText) {
+      var errors = _.compact(
+        _.map(['errors', 'error'], function (type) {
+          return responseText[type] && responseText[type].join(', ');
+        })
+      );
+      errorMessage = errors.join(', ');
+    }
+
+    return errorMessage;
+  } catch (err) {
+    return DEFAULT_ERROR_MSG;
+  }
+};