[Chromoting] Move shared webapp JS files from crd/js -> base/js

remoting/webapp/crd/js/fallback_signal_strategy.js

-// Copyright 2015 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 || {};
-
-/**
- * A signal strategy encapsulating a primary and a back-up strategy. If the
- * primary fails or times out, then the secondary is used. Information about
- * which strategy was used, and why, is returned via |onProgressCallback|.
- *
- * @param {remoting.SignalStrategy} primary
- * @param {remoting.SignalStrategy} secondary
- *
- * @implements {remoting.SignalStrategy}
- * @constructor
- */
-remoting.FallbackSignalStrategy = function(primary,
-                                           secondary) {
-  /** @private {remoting.SignalStrategy} */
-  this.primary_ = primary;
-  this.primary_.setStateChangedCallback(this.onPrimaryStateChanged_.bind(this));
-
-  /** @private {remoting.SignalStrategy} */
-  this.secondary_ = secondary;
-  this.secondary_.setStateChangedCallback(
-      this.onSecondaryStateChanged_.bind(this));
-
-  /** @private {?function(remoting.SignalStrategy.State)} */
-  this.onStateChangedCallback_ = null;
-
-  /** @private {?function(Element):void} */
-  this.onIncomingStanzaCallback_ = null;
-
-  /**
-   * @private {number}
-   * @const
-   */
-  this.PRIMARY_CONNECT_TIMEOUT_MS_ = 10 * 1000;
-
-  /**
-   * @enum {string}
-   * @private
-   */
-  this.State = {
-    NOT_CONNECTED: 'not-connected',
-    PRIMARY_PENDING: 'primary-pending',
-    PRIMARY_SUCCEEDED: 'primary-succeeded',
-    SECONDARY_PENDING: 'secondary-pending',
-    SECONDARY_SUCCEEDED: 'secondary-succeeded',
-    SECONDARY_FAILED: 'secondary-failed',
-    CLOSED: 'closed'
-  };
-
-  /** @private {string} */
-  this.state_ = this.State.NOT_CONNECTED;
-
-  /** @private {?remoting.SignalStrategy.State} */
-  this.externalState_ = null;
-
-  /** @private {string} */
-  this.server_ = '';
-
-  /** @private {string} */
-  this.username_ = '';
-
-  /** @private {string} */
-  this.authToken_ = '';
-
-  /** @private {number} */
-  this.primaryConnectTimerId_ = 0;
-
-  /** @private {remoting.LogToServer} */
-  this.logToServer_ = null;
-
-  /**
-   * @type {Array<{strategyType: remoting.SignalStrategy.Type,
-                    progress: remoting.FallbackSignalStrategy.Progress}>}
-   */
-  this.connectionSetupResults_ = [];
-
-};
-
-/**
- * @enum {string}
- */
-remoting.FallbackSignalStrategy.Progress = {
-  SUCCEEDED: 'succeeded',
-  FAILED: 'failed',
-  TIMED_OUT: 'timed-out',
-  SUCCEEDED_LATE: 'succeeded-late',
-  FAILED_LATE: 'failed-late',
-};
-
-remoting.FallbackSignalStrategy.prototype.dispose = function() {
-  this.primary_.dispose();
-  this.secondary_.dispose();
-};
-
-/**
- * @param {function(remoting.SignalStrategy.State):void} onStateChangedCallback
- *   Callback to call on state change.
- */
-remoting.FallbackSignalStrategy.prototype.setStateChangedCallback = function(
-    onStateChangedCallback) {
-  this.onStateChangedCallback_ = onStateChangedCallback;
-};
-
-/**
- * @param {?function(Element):void} onIncomingStanzaCallback Callback to call on
- *     incoming messages.
- */
-remoting.FallbackSignalStrategy.prototype.setIncomingStanzaCallback =
-    function(onIncomingStanzaCallback) {
-  this.onIncomingStanzaCallback_ = onIncomingStanzaCallback;
-  if (this.state_ == this.State.PRIMARY_PENDING ||
-      this.state_ == this.State.PRIMARY_SUCCEEDED) {
-    this.primary_.setIncomingStanzaCallback(onIncomingStanzaCallback);
-  } else if (this.state_ == this.State.SECONDARY_PENDING ||
-             this.state_ == this.State.SECONDARY_SUCCEEDED) {
-    this.secondary_.setIncomingStanzaCallback(onIncomingStanzaCallback);
-  }
-};
-
-/**
- * @param {string} server
- * @param {string} username
- * @param {string} authToken
- */
-remoting.FallbackSignalStrategy.prototype.connect =
-    function(server, username, authToken) {
-  base.debug.assert(this.state_ == this.State.NOT_CONNECTED);
-  base.debug.assert(this.onStateChangedCallback_ != null);
-  this.server_ = server;
-  this.username_ = username;
-  this.authToken_ = authToken;
-  this.state_ = this.State.PRIMARY_PENDING;
-  this.primary_.setIncomingStanzaCallback(this.onIncomingStanzaCallback_);
-  this.primary_.connect(server, username, authToken);
-  this.primaryConnectTimerId_ =
-      window.setTimeout(this.onPrimaryTimeout_.bind(this),
-                        this.PRIMARY_CONNECT_TIMEOUT_MS_);
-};
-
-/**
- * Sends a message. Can be called only in CONNECTED state.
- * @param {string} message
- */
-remoting.FallbackSignalStrategy.prototype.sendMessage = function(message) {
-  this.getConnectedSignalStrategy_().sendMessage(message);
-};
-
-/**
- * Send any messages accumulated during connection set-up.
- *
- * @param {remoting.LogToServer} logToServer The LogToServer instance for the
- *     connection.
- */
-remoting.FallbackSignalStrategy.prototype.sendConnectionSetupResults =
-    function(logToServer) {
-  this.logToServer_ = logToServer;
-  this.sendConnectionSetupResultsInternal_();
-}
-
-remoting.FallbackSignalStrategy.prototype.sendConnectionSetupResultsInternal_ =
-    function() {
-  for (var i = 0; i < this.connectionSetupResults_.length; ++i) {
-    var result = this.connectionSetupResults_[i];
-    this.logToServer_.logSignalStrategyProgress(result.strategyType,
-                                                result.progress);
-  }
-  this.connectionSetupResults_ = [];
-};
-
-/** @return {remoting.SignalStrategy.State} Current state */
-remoting.FallbackSignalStrategy.prototype.getState = function() {
-  return (this.externalState_ === null)
-      ? remoting.SignalStrategy.State.NOT_CONNECTED
-      : this.externalState_;
-};
-
-/** @return {!remoting.Error} Error when in FAILED state. */
-remoting.FallbackSignalStrategy.prototype.getError = function() {
-  base.debug.assert(this.state_ == this.State.SECONDARY_FAILED);
-  base.debug.assert(
-      this.secondary_.getState() == remoting.SignalStrategy.State.FAILED);
-  return this.secondary_.getError();
-};
-
-/** @return {string} Current JID when in CONNECTED state. */
-remoting.FallbackSignalStrategy.prototype.getJid = function() {
-  return this.getConnectedSignalStrategy_().getJid();
-};
-
-/** @return {remoting.SignalStrategy.Type} The signal strategy type. */
-remoting.FallbackSignalStrategy.prototype.getType = function() {
-  return this.getConnectedSignalStrategy_().getType();
-};
-
-/**
- * @return {remoting.SignalStrategy} The active signal strategy, if the
- *     connection has succeeded.
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.getConnectedSignalStrategy_ =
-    function() {
-  if (this.state_ == this.State.PRIMARY_SUCCEEDED) {
-    base.debug.assert(
-        this.primary_.getState() == remoting.SignalStrategy.State.CONNECTED);
-    return this.primary_;
-  } else if (this.state_ == this.State.SECONDARY_SUCCEEDED) {
-    base.debug.assert(
-        this.secondary_.getState() == remoting.SignalStrategy.State.CONNECTED);
-    return this.secondary_;
-  } else {
-    base.debug.assert(
-        false,
-        'getConnectedSignalStrategy called in unconnected state');
-    return null;
-  }
-};
-
-/**
- * @param {remoting.SignalStrategy.State} state
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.onPrimaryStateChanged_ =
-    function(state) {
-  switch (state) {
-    case remoting.SignalStrategy.State.CONNECTED:
-      if (this.state_ == this.State.PRIMARY_PENDING) {
-        window.clearTimeout(this.primaryConnectTimerId_);
-        this.updateProgress_(
-            this.primary_,
-            remoting.FallbackSignalStrategy.Progress.SUCCEEDED);
-        this.state_ = this.State.PRIMARY_SUCCEEDED;
-      } else {
-        this.updateProgress_(
-            this.primary_,
-            remoting.FallbackSignalStrategy.Progress.SUCCEEDED_LATE);
-      }
-      break;
-
-    case remoting.SignalStrategy.State.FAILED:
-      if (this.state_ == this.State.PRIMARY_PENDING) {
-        window.clearTimeout(this.primaryConnectTimerId_);
-        this.updateProgress_(
-            this.primary_,
-            remoting.FallbackSignalStrategy.Progress.FAILED);
-        this.connectSecondary_();
-      } else {
-        this.updateProgress_(
-            this.primary_,
-            remoting.FallbackSignalStrategy.Progress.FAILED_LATE);
-      }
-      return;  // Don't notify the external callback
-
-    case remoting.SignalStrategy.State.CLOSED:
-      this.state_ = this.State.CLOSED;
-      break;
-  }
-
-  this.notifyExternalCallback_(state);
-};
-
-/**
- * @param {remoting.SignalStrategy.State} state
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.onSecondaryStateChanged_ =
-    function(state) {
-  switch (state) {
-    case remoting.SignalStrategy.State.CONNECTED:
-      this.updateProgress_(
-          this.secondary_,
-          remoting.FallbackSignalStrategy.Progress.SUCCEEDED);
-      this.state_ = this.State.SECONDARY_SUCCEEDED;
-      break;
-
-    case remoting.SignalStrategy.State.FAILED:
-      this.updateProgress_(
-          this.secondary_,
-          remoting.FallbackSignalStrategy.Progress.FAILED);
-      this.state_ = this.State.SECONDARY_FAILED;
-      break;
-
-    case remoting.SignalStrategy.State.CLOSED:
-      this.state_ = this.State.CLOSED;
-      break;
-  }
-
-  this.notifyExternalCallback_(state);
-};
-
-/**
- * Notify the external callback of a change in state if it's consistent with
- * the allowed state transitions (ie, if it represents a later stage in the
- * connection process). Suppress state transitions that would violate this,
- * for example a CONNECTING -> NOT_CONNECTED transition when we switch from
- * the primary to the secondary signal strategy.
- *
- * @param {remoting.SignalStrategy.State} state
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.notifyExternalCallback_ =
-    function(state) {
-  if (this.externalState_ === null || state > this.externalState_) {
-    this.externalState_ = state;
-    this.onStateChangedCallback_(state);
-  }
-};
-
-/**
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.connectSecondary_ = function() {
-  base.debug.assert(this.state_ == this.State.PRIMARY_PENDING);
-  base.debug.assert(this.server_ != '');
-  base.debug.assert(this.username_ != '');
-  base.debug.assert(this.authToken_ != '');
-
-  this.state_ = this.State.SECONDARY_PENDING;
-  this.primary_.setIncomingStanzaCallback(null);
-  this.secondary_.setIncomingStanzaCallback(this.onIncomingStanzaCallback_);
-  this.secondary_.connect(this.server_, this.username_, this.authToken_);
-};
-
-/**
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.onPrimaryTimeout_ = function() {
-  this.updateProgress_(
-      this.primary_,
-      remoting.FallbackSignalStrategy.Progress.TIMED_OUT);
-  this.connectSecondary_();
-};
-
-/**
- * @param {remoting.SignalStrategy} strategy
- * @param {remoting.FallbackSignalStrategy.Progress} progress
- * @private
- */
-remoting.FallbackSignalStrategy.prototype.updateProgress_ = function(
-    strategy, progress) {
-  console.log('FallbackSignalStrategy progress: ' + strategy.getType() + ' ' +
-      progress);
-  this.connectionSetupResults_.push({
-    'strategyType': strategy.getType(),
-    'progress': progress
-  });
-  if (this.logToServer_) {
-    this.sendConnectionSetupResultsInternal_();
-  }
-};