/**
+ * @class Ext.direct.Manager
+ * <p><b><u>Overview</u></b></p>
+ *
+ * <p>Ext.Direct aims to streamline communication between the client and server
+ * by providing a single interface that reduces the amount of common code
+ * typically required to validate data and handle returned data packets
+ * (reading data, error conditions, etc).</p>
+ *
+ * <p>The Ext.direct namespace includes several classes for a closer integration
+ * with the server-side. The Ext.data namespace also includes classes for working
+ * with Ext.data.Stores which are backed by data from an Ext.Direct method.</p>
+ *
+ * <p><b><u>Specification</u></b></p>
+ *
+ * <p>For additional information consult the
+ * <a href="http://sencha.com/products/extjs/extdirect">Ext.Direct Specification</a>.</p>
+ *
+ * <p><b><u>Providers</u></b></p>
+ *
+ * <p>Ext.Direct uses a provider architecture, where one or more providers are
+ * used to transport data to and from the server. There are several providers
+ * that exist in the core at the moment:</p><div class="mdetail-params"><ul>
+ *
+ * <li>{@link Ext.direct.JsonProvider JsonProvider} for simple JSON operations</li>
+ * <li>{@link Ext.direct.PollingProvider PollingProvider} for repeated requests</li>
+ * <li>{@link Ext.direct.RemotingProvider RemotingProvider} exposes server side
+ * on the client.</li>
+ * </ul></div>
+ *
+ * <p>A provider does not need to be invoked directly, providers are added via
+ * {@link Ext.direct.Manager}.{@link Ext.direct.Manager#add add}.</p>
+ *
+ * <p><b><u>Router</u></b></p>
+ *
+ * <p>Ext.Direct utilizes a "router" on the server to direct requests from the client
+ * to the appropriate server-side method. Because the Ext.Direct API is completely
+ * platform-agnostic, you could completely swap out a Java based server solution
+ * and replace it with one that uses C# without changing the client side JavaScript
+ * at all.</p>
+ *
+ * <p><b><u>Server side events</u></b></p>
+ *
+ * <p>Custom events from the server may be handled by the client by adding
+ * listeners, for example:</p>
+ * <pre><code>
+{"type":"event","name":"message","data":"Successfully polled at: 11:19:30 am"}
+
+// add a handler for a 'message' event sent by the server
+Ext.direct.Manager.on('message', function(e){
+ out.append(String.format('<p><i>{0}</i></p>', e.data));
+ out.el.scrollTo('t', 100000, true);
+});
+ * </code></pre>
+ * @singleton
+ */
+
+Ext.define('Ext.direct.Manager', {
+
+ /* Begin Definitions */
+ singleton: true,
+
+ mixins: {
+ observable: 'Ext.util.Observable'
+ },
+
+ requires: ['Ext.util.MixedCollection'],
+
+ statics: {
+ exceptions: {
+ TRANSPORT: 'xhr',
+ PARSE: 'parse',
+ LOGIN: 'login',
+ SERVER: 'exception'
+ }
+ },
+
+ /* End Definitions */
+
+ constructor: function(){
+ var me = this;
+
+ me.addEvents(
+ /**
+ * @event event
+ * Fires after an event.
+ * @param {event} e The Ext.direct.Event type that occurred.
+ * @param {Ext.direct.Provider} provider The {@link Ext.direct.Provider Provider}.
+ */
+ 'event',
+ /**
+ * @event exception
+ * Fires after an event exception.
+ * @param {event} e The Ext.direct.Event type that occurred.
+ */
+ 'exception'
+ );
+ me.transactions = Ext.create('Ext.util.MixedCollection');
+ me.providers = Ext.create('Ext.util.MixedCollection');
+
+ me.mixins.observable.constructor.call(me);
+ },
+
+ /**
+ * Adds an Ext.Direct Provider and creates the proxy or stub methods to execute server-side methods.
+ * If the provider is not already connected, it will auto-connect.
+ * <pre><code>
+var pollProv = new Ext.direct.PollingProvider({
+ url: 'php/poll2.php'
+});
+
+Ext.direct.Manager.addProvider({
+ "type":"remoting", // create a {@link Ext.direct.RemotingProvider}
+ "url":"php\/router.php", // url to connect to the Ext.Direct server-side router.
+ "actions":{ // each property within the actions object represents a Class
+ "TestAction":[ // array of methods within each server side Class
+ {
+ "name":"doEcho", // name of method
+ "len":1
+ },{
+ "name":"multiply",
+ "len":1
+ },{
+ "name":"doForm",
+ "formHandler":true, // handle form on server with Ext.Direct.Transaction
+ "len":1
+ }]
+ },
+ "namespace":"myApplication",// namespace to create the Remoting Provider in
+},{
+ type: 'polling', // create a {@link Ext.direct.PollingProvider}
+ url: 'php/poll.php'
+}, pollProv); // reference to previously created instance
+ * </code></pre>
+ * @param {Object/Array} provider Accepts either an Array of Provider descriptions (an instance
+ * or config object for a Provider) or any number of Provider descriptions as arguments. Each
+ * Provider description instructs Ext.Direct how to create client-side stub methods.
+ */
+ addProvider : function(provider){
+ var me = this,
+ args = arguments,
+ i = 0,
+ len;
+
+ if (args.length > 1) {
+ for (len = args.length; i < len; ++i) {
+ me.addProvider(args[i]);
+ }
+ return;
+ }
+
+ // if provider has not already been instantiated
+ if (!provider.isProvider) {
+ provider = Ext.create('direct.' + provider.type + 'provider', provider);
+ }
+ me.providers.add(provider);
+ provider.on('data', me.onProviderData, me);
+
+
+ if (!provider.isConnected()) {
+ provider.connect();
+ }
+
+ return provider;
+ },
+
+ /**
+ * Retrieve a {@link Ext.direct.Provider provider} by the
+ * <b><tt>{@link Ext.direct.Provider#id id}</tt></b> specified when the provider is
+ * {@link #addProvider added}.
+ * @param {String/Ext.data.Provider} id The id of the provider, or the provider instance.
+ */
+ getProvider : function(id){
+ return id.isProvider ? id : this.providers.get(id);
+ },
+
+ /**
+ * Removes the provider.
+ * @param {String/Ext.direct.Provider} provider The provider instance or the id of the provider.
+ * @return {Ext.direct.Provider} The provider, null if not found.
+ */
+ removeProvider : function(provider){
+ var me = this,
+ providers = me.providers,
+ provider = provider.isProvider ? provider : providers.get(provider);
+
+ if (provider) {
+ provider.un('data', me.onProviderData, me);
+ providers.remove(provider);
+ return provider;
+ }
+ return null;
+ },
+
+ /**
+ * Add a transaction to the manager.
+ * @private
+ * @param {Ext.direct.Transaction} transaction The transaction to add
+ * @return {Ext.direct.Transaction} transaction
+ */
+ addTransaction: function(transaction){
+ this.transactions.add(transaction);
+ return transaction;
+ },
+
+ /**
+ * Remove a transaction from the manager.
+ * @private
+ * @param {String/Ext.direct.Transaction} transaction The transaction/id of transaction to remove
+ * @return {Ext.direct.Transaction} transaction
+ */
+ removeTransaction: function(transaction){
+ transaction = this.getTransaction(transaction);
+ this.transactions.remove(transaction);
+ return transaction;
+ },
+
+ /**
+ * Gets a transaction
+ * @private
+ * @param {String/Ext.direct.Transaction} transaction The transaction/id of transaction to get
+ * @return {Ext.direct.Transaction}
+ */
+ getTransaction: function(transaction){
+ return transaction.isTransaction ? transaction : this.transactions.get(transaction);
+ },
+
+ onProviderData : function(provider, event){
+ var me = this,
+ i = 0,
+ len;
+
+ if (Ext.isArray(event)) {
+ for (len = event.length; i < len; ++i) {
+ me.onProviderData(provider, event[i]);
+ }
+ return;
+ }
+ if (event.name && event.name != 'event' && event.name != 'exception') {
+ me.fireEvent(event.name, event);
+ } else if (event.type == 'exception') {
+ me.fireEvent('exception', event);
+ }
+ me.fireEvent('event', event, provider);
+ }
+}, function(){
+ // Backwards compatibility
+ Ext.Direct = Ext.direct.Manager;
+});
+