Add more host-side connection state logging for IT2Me.

remoting/webapp/crd/js/buffered_signal_strategy.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';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/**
+ * Simplified SignalStrategy implementation that wraps an underlying signal
+ * strategy and forwards messages when it is CONNECTED. It is used only to
+ * log status messages during IT2Me connection setup, and only those methods
+ * required for that are implemented.
+ *
+ * TODO(jamiewalch): Remove this class once a signal strategy is no longer
+ *     required for logging (crbug.com/497269).
+ *
+ * @constructor
+ * @param {remoting.SignalStrategy} underlying The underlying implementation.
+ * @implements {remoting.SignalStrategy}
+ */
+remoting.BufferedSignalStrategy = function(underlying) {
+  /** @private */
+  this.underlying_ = underlying;
+  /** @private {Array<string>} */
+  this.pendingMessages_ = [];
+
+  this.underlying_.setStateChangedCallback(this.flush_.bind(this));
+};
+
+remoting.BufferedSignalStrategy.prototype.dispose = function() {
+  this.underlying_.dispose();
+};
+
+/**
+ * Sends a message. Can be called only in CONNECTED state.
+ * @param {string} message
+ */
+remoting.BufferedSignalStrategy.prototype.sendMessage = function(message) {
+  this.pendingMessages_.push(message);
+  this.flush_();
+};
+
+/**
+ * Send any messages accumulated during connection set-up.
+ *
+ * @param {remoting.LogToServer} logToServer The LogToServer instance for the
+ *     connection.
+ */
+remoting.BufferedSignalStrategy.prototype.sendConnectionSetupResults =
+    function(logToServer) {
+  this.underlying_.sendConnectionSetupResults(logToServer);
+};
+
+/**
+ * If the underlying implementation is connected, flush all pending messages.
+ * @private
+ */
+remoting.BufferedSignalStrategy.prototype.flush_ = function() {
+  if (this.underlying_.getState() !== remoting.SignalStrategy.State.CONNECTED) {
+    return;
+  }
+  for (var i = 0; i < this.pendingMessages_.length; ++i) {
+    this.underlying_.sendMessage(this.pendingMessages_[i]);
+  }
+  this.pendingMessages_ = [];
+};
+
+
+// The following methods are not used by LogToServer and are not implemented.
+
+remoting.BufferedSignalStrategy.prototype.setStateChangedCallback =
+    function(onStateChangedCallback) {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.setIncomingStanzaCallback =
+    function(onIncomingStanzaCallback) {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.connect =
+    function(server, username, authToken) {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.sendConnectionSetupResults =
+    function(logToServer) {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.getState = function() {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.getError = function() {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.getJid = function() {
+  base.debug.assert(false);
+};
+
+remoting.BufferedSignalStrategy.prototype.getType = function() {
+  base.debug.assert(false);
+};