Open Source Monorail

appengine/monorail/static/js/tracker/tracker-fields.js

+/* Copyright 2016 The Chromium Authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+/**
+ * This file contains JS code for editing fields and field definitions.
+ */
+
+var TKR_fieldNameXmlHttp;
+
+
+/**
+ * Function that communicates with the server.
+ * @param {string} projectName Current project name.
+ * @param {string} fieldName The proposed field name.
+ * @param {string} token security token.
+ */
+function TKR_checkFieldNameOnServer(projectName, fieldName, token) {
+  var url = ('/p/' + projectName + '/fields/checkName' +
+             '?field=' + encodeURIComponent(fieldName) +
+             '&token=' + token);
+  TKR_fieldNameXmlHttp = XH_XmlHttpCreate();
+  XH_XmlHttpGET(TKR_fieldNameXmlHttp, url, TKR_fieldNameCallback);
+}
+
+/**
+ * The communication with the server has made some progress.  If it is
+ * done, then process the response.
+ */
+function TKR_fieldNameCallback() {
+  if (TKR_fieldNameXmlHttp.readyState == 4) {
+    if (TKR_fieldNameXmlHttp.status == 200) {
+      TKR_gotFieldNameFeed(TKR_fieldNameXmlHttp);
+    }
+  }
+}
+
+
+/**
+ * Function that evaluates the server response and sets the error message.
+ * @param {object} xhr AJAX response with JSON text.
+ */
+function TKR_gotFieldNameFeed(xhr) {
+  var json_data = null;
+  try {
+    json_data = CS_parseJSON(xhr);
+  }
+  catch (e) {
+    return;
+  }
+  var errorMessage = json_data['error_message'];
+  $('fieldnamefeedback').innerText = errorMessage;
+
+  var choicesLines = [];
+  if (json_data['choices'].length > 0) {
+    for (var i = 0; i < json_data['choices'].length; i++) {
+      choicesLines.push(
+          json_data['choices'][i]['name'] + ' = ' +
+          json_data['choices'][i]['doc']);
+    }
+    $('choices').innerText = choicesLines.join('\n');
+    $('field_type').value = 'enum_type';
+    $('choices_row').style.display = '';
+    enableOtherTypeOptions(true);
+  } else {
+    enableOtherTypeOptions(false);
+  }
+
+  $('submit_btn').disabled = errorMessage ? 'disabled' : '';
+}
+
+
+function enableOtherTypeOptions(disabled) {
+  var type_option_el = $('field_type').firstChild;
+  while (type_option_el) {
+    if (type_option_el.tagName == 'OPTION') {
+      if (type_option_el.value != 'enum_type') {
+        type_option_el.disabled = disabled ? 'disabled' : '';
+      }
+    }
+    type_option_el = type_option_el.nextSibling;
+  }
+}