Make some of the sync adaptor methods be optional

core/modules/syncer.js

@@ -81,8 +81,6 @@ Syncer.prototype.init = function() {
 	this.taskInProgress = {}; // Hash of tasks in progress
 	this.taskTimerId = null; // Timer for task dispatch
 	this.pollTimerId = null; // Timer for polling server
-	// Mark us as not logged in
-	this.wiki.addTiddler({title: this.titleIsLoggedIn,text: "no"});
 	// Listen out for changes to tiddlers
 	this.wiki.addEventListener("change",function(changes) {
 		self.syncToServer(changes);
@@ -91,7 +89,8 @@ Syncer.prototype.init = function() {
 	this.wiki.addEventListener("lazyLoad",function(title) {
 		self.handleLazyLoadEvent(title);
 	});
-	// Listen our for login/logout/refresh events
+	// Listen out for login/logout/refresh events in the browser
+	if($tw.browser) {
 		document.addEventListener("tw-login",function(event) {
 			self.handleLoginEvent(event);
 		},false);
@@ -101,6 +100,7 @@ Syncer.prototype.init = function() {
 		document.addEventListener("tw-server-refresh",function(event) {
 			self.handleRefreshEvent(event);
 		},false);
+	}
 	// Get the login status
 	this.getStatus(function (err,isLoggedIn) {
 		if(isLoggedIn) {
@@ -127,6 +127,11 @@ Syncer.prototype.storeTiddler = function(tiddlerFields) {
 
 Syncer.prototype.getStatus = function(callback) {
 	var self = this;
+	// Check if the adaptor supports getStatus()
+	if(this.syncadaptor.getStatus) {
+		// Mark us as not logged in
+		this.wiki.addTiddler({title: this.titleIsLoggedIn,text: "no"});
+		// Get login status
 		this.syncadaptor.getStatus(function(err,isLoggedIn,username) {
 			if(err) {
 				self.showError(err);
@@ -144,12 +149,16 @@ Syncer.prototype.getStatus = function(callback) {
 				callback(err,isLoggedIn,username);
 			}
 		});
+	} else {
+		callback(null,true,"UNAUTHENTICATED");
+	}
 };
 
 /*
 Synchronise from the server by reading the skinny tiddler list and queuing up loads for any tiddlers that we don't already have up to date
 */
 Syncer.prototype.syncFromServer = function() {
+	if(this.syncadaptor.getSkinnyTiddlers) {
 		this.log("Retrieving skinny tiddler list");
 		var self = this;
 		if(this.pollTimerId) {
@@ -158,7 +167,7 @@ Syncer.prototype.syncFromServer = function() {
 		}
 		this.syncadaptor.getSkinnyTiddlers(function(err,tiddlers) {
 			// Trigger another sync
-		self.pollTimerId = window.setTimeout(function() {
+			self.pollTimerId = setTimeout(function() {
 				self.pollTimerId = null;
 				self.syncFromServer.call(self);
 			},self.pollTimerInterval);
@@ -191,6 +200,7 @@ Syncer.prototype.syncFromServer = function() {
 				}
 			}
 		});
+	}
 };
 
 /*
@@ -248,6 +258,7 @@ Attempt to login to TiddlyWeb.
 Syncer.prototype.login = function(username,password,callback) {
 	this.log("Attempting to login as",username);
 	var self = this;
+	if(this.syncadaptor.login) {
 		this.syncadaptor.login(username,password,function(err) {
 			if(err) {
 				return callback(err);
@@ -258,6 +269,9 @@ Syncer.prototype.login = function(username,password,callback) {
 				}
 			});
 		});
+	} else {
+		callback(null,true);
+	}
 };
 
 /*
@@ -266,6 +280,7 @@ Attempt to log out of TiddlyWeb
 Syncer.prototype.handleLogoutEvent = function() {
 	this.log("Attempting to logout");
 	var self = this;
+	if(this.syncadaptor.logout) {
 		this.syncadaptor.logout(function(err) {
 			if(err) {
 				self.showError(err);
@@ -273,6 +288,7 @@ Syncer.prototype.handleLogoutEvent = function() {
 				self.getStatus();
 			}
 		});
+	}
 };
 
 /*
@@ -342,7 +358,7 @@ Trigger a timeout if one isn't already outstanding
 Syncer.prototype.triggerTimeout = function() {
 	var self = this;
 	if(!this.taskTimerId) {
-		this.taskTimerId = window.setTimeout(function() {
+		this.taskTimerId = setTimeout(function() {
 			self.taskTimerId = null;
 			self.processTaskQueue.call(self);
 		},self.taskTimerInterval);