Replace chrome://network implementation with networkConfig API

chrome/browser/resources/chromeos/network/network_config.js

+// Copyright 2014 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.
+
+'use strict';
+
+/**
+ * @fileoverview This object provides a similar API to chrome.networkingPrivate.
+ * It simulates the extension callback model by storing callbacks in a member
+ * object and invoking them when the corresponding method is called by Chrome in
+ * response to a chrome.send call.
+ */
+
+var networkConfig = {
+  /**
+   * Return the property associated with a key (which may reference a
+   * sub-object).
+   *
+   * @param {Object} properties The object containing the network properties.
+   * @param {string} key The ONC key for the property. May refer to a nested
+   *   propety, e.g. 'WiFi.Security'.

[xiyuan, 2014/05/23 22:12:19]

nit: add two more spaces before "property".

[stevenjb, 2014/05/27 15:58:35]

Done.

+   * @return {Mixed} The value associated with the property.
+   */
+  getValueFromProperties: function(properties, key) {
+    if (!key) {
+      console.error('Empty key');
+      return undefined;
+    }
+    var dot = key.indexOf('.');
+    if (dot > 0) {
+      var key1 = key.substring(0, dot);
+      var key2 = key.substring(dot + 1);
+      var subobject = properties[key1];
+      if (subobject)
+        return this.getValueFromProperties(subobject, key2);
+    }
+    return properties[key];
+  },
+
+  /**
+   * Generate a unique id for 'callback' and store it for future retrieval.
+   *
+   * @param {function} callback The associated callback.
+   * @return {integer} The id of the callback.
+   * @private
+   */
+  callbackId: 1,
+  callbackMap: {},
+  storeCallback_: function(callback) {
+    var id = this.callbackId++;
+    this.callbackMap[id] = callback;
+    return id;
+  },
+
+  /**
+   * Retrieve the callback associated with |id| and remove it from the map.
+   *
+   * @param {integer} id The id of the callback.
+   * @return {function} The associated callback.
+   * @private
+   */
+  retrieveCallback_: function(id) {
+    var callback = this.callbackMap[id];
+    delete this.callbackMap[id];
+    return callback;
+  },
+
+  /**
+   * Callback invoked by Chrome.
+   *
+   * @param {Array} args A list of arguments passed to the callback. The first
+   *   entry must be the callbackId passed to chrome.send.
+   */
+  chromeCallbackSuccess: function(args) {
+    var callbackId = args.shift();
+    var callback = this.retrieveCallback_(callbackId);
+    this.lastError = '';
+    if (callback)
+      callback.apply(null, args);
+    else
+      console.error('Callback not found for id: ' + callbackId);
+  },
+
+  /**
+   * Error Callback invoked by Chrome. Sets lastError and logs to the console.
+   *
+   * @param {Args} args A list of arguments. The first entry must be the
+   *   callbackId passed to chrome.send.
+   */
+  lastError: '',
+  chromeCallbackError: function(args) {
+    var callbackId = args.shift();
+    this.lastError = args.shift();
+    console.error('Callback error: "' + this.lastError);
+    // We still invoke the callback, but with null args. The callback should
+    // check this.lastError and handle that.
+    var callback = this.retrieveCallback_(callbackId);
+    if (callback)
+      callback.apply(null, null);
+  },
+
+  /**
+   * Implement networkingPrivate.getProperties. See networking_private.json.
+   *
+   * @param {string} guid The guid identifying the network.
+   * @param {function()} callback The callback to call on completion.
+   */
+  getProperties: function(guid, callback) {
+    var callbackId = this.storeCallback_(callback);
+    chrome.send('networkConfig.getProperties', [callbackId, guid]);
+  },
+
+  /**
+   * Implement networkingPrivate.getNetworks. See networking_private.json.
+   *
+   * @param {string} guid The guid identifying the network.
+   * @param {function()} callback The callback to call on completion.
+   */
+  getNetworks: function(filter, callback) {
+    var callbackId = this.storeCallback_(callback);
+    chrome.send('networkConfig.getNetworks', [callbackId, filter]);
+  }
+};