* Start work on MenuStack

core/client.js

@@ -39,6 +39,7 @@ var user		= require('./user.js');
 var moduleUtil	= require('./module_util.js');
 var menuUtil	= require('./menu_util.js');
 var Config		= require('./config.js').config;
+var MenuStack	= require('./menu_stack.js');
 
 var stream		= require('stream');
 var assert		= require('assert');
@@ -93,6 +94,7 @@ function Client(input, output) {
 	this.user				= new user.User();
 	this.currentTheme		= { info : { name : 'N/A', description : 'None' } };
 	this.lastKeyPressMs		= Date.now();
+	this.menuStack			= new MenuStack();
 
 	Object.defineProperty(this, 'node', {
 		get : function() {
@@ -363,7 +365,7 @@ function Client(input, output) {
 			}
 
 			if(key || ch) {
-				self.log.trace( { key : key, ch : escape(ch) }, 'User keyboard input');
+				self.log.trace( { key : key, ch : escape(ch) }, 'User keyboard input');	// jshint ignore:line
 
 				self.lastKeyPressMs = Date.now();
 

core/menu_stack.js

@@ -0,0 +1,124 @@
+/* jslint node: true */
+'use strict';
+
+//	ENiGMA½
+var menuUtil	= require('./menu_util.js');
+
+var _			= require('lodash');
+
+/*
+MenuStack(client)
+	stack[] push, pop, ...
+
+	next()
+	goto(name, options, cb)
+	prev()
+
+MenuModule
+	nextMenu()
+	gotoMenu(name, options, cb)
+	prevMenu()
+*/
+
+module.exports	= MenuStack;
+
+function MenuStack(client) {
+	this.client	= client;
+	this.stack	= [];
+
+	var self	= this;
+
+	this.push = function(moduleInfo) {
+		return self.stack.push(moduleInfo);
+	};
+
+	this.pop = function() {
+		return self.stack.pop();
+	};
+
+	this.top = function() {
+		return self.stack[self.stack.length - 1];
+	};
+}
+
+MenuStack.prototype.next = function(cb) {
+	var currentModuleInfo = this.menuStack.top();
+
+	/*
+		{
+			instance : modInst,
+			menuConfig : {}, 
+			extraArgs : {}
+			name : 'menuName',
+			savedState : {}
+		}
+	*/
+
+	if(!_.isString(currentModuleInfo.menuConfig.next)) {
+		this.log.error('No \'next\' member in menu config!');
+		return;
+	}
+
+	if(current.menuConfig.next === currentModuleInfo.name) {
+		this.log.warn('Menu config \'next\' specifies current menu!');
+		return;
+	}
+
+	this.goto(current.menuConfig.next, { }, cb);
+};
+
+MenuStack.prototype.prev = function() {
+
+};
+
+MenuStack.prototype.goto = function(name, options, cb) {
+	var currentModuleInfo = this.menuStack.top();
+
+	var self = this;
+
+	if(name === currentModuleInfo.name) {
+		var err = new Error('Already at supplied menu!');
+	
+		self.client.log.warn( { menuName : name, error : err.toString() }, 'Cannot go to menu');
+
+		if(cb) {
+			cb(err);	//	non-fatal
+		}
+		return;
+	}
+
+	var loadOpts = {
+		name		: name,
+		client		: self.client, 
+		extraArgs	: options.extraArgs,
+	};
+
+	menuUtil.loadMenu(loadOpts, function menuLoaded(err, modInst) {
+		if(err) {
+			var errCb = cb || self.defaultHandlerMissingMod();
+			errCb(err);
+		} else {
+			self.client.detachCurrentMenuModule();
+
+			self.client.log.debug( { menuName : name }, 'Goto menu module');
+
+			var modInfo = {
+				name		: name,
+				instance	: modInst,
+				extraArgs	: options.extraArgs,
+			};
+
+			self.push(modInfo);
+
+			modInst.enter(self.client);
+
+			if(cb) {
+				cb(null);
+			}
+		}
+	});
+};
+
+MenuStack.prototype.getCurrentModule = function() {
+	return this.top().instance;
+};