jaroslav@238: /**
jaroslav@238:  * The MIT License (MIT)
jaroslav@238:  *
jaroslav@238:  * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@238:  *
jaroslav@238:  * Permission is hereby granted, free of charge, to any person obtaining a copy
jaroslav@238:  * of this software and associated documentation files (the "Software"), to deal
jaroslav@238:  * in the Software without restriction, including without limitation the rights
jaroslav@238:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jaroslav@238:  * copies of the Software, and to permit persons to whom the Software is
jaroslav@238:  * furnished to do so, subject to the following conditions:
jaroslav@238:  *
jaroslav@238:  * The above copyright notice and this permission notice shall be included in
jaroslav@238:  * all copies or substantial portions of the Software.
jaroslav@238:  *
jaroslav@238:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jaroslav@238:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jaroslav@238:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jaroslav@238:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jaroslav@238:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jaroslav@238:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jaroslav@238:  * THE SOFTWARE.
jaroslav@238:  */
jaroslav@238: package org.apidesign.demo.chat;
jaroslav@238: 
jaroslav@238: import net.java.html.json.ComputedProperty;
jaroslav@238: import net.java.html.json.Function;
jaroslav@238: import net.java.html.json.Model;
jaroslav@238: import net.java.html.json.OnReceive;
jaroslav@238: import net.java.html.json.Property;
jaroslav@238: import org.apidesign.demo.chat.shared.Message;
jaroslav@238: import org.apidesign.demo.chat.shared.Query;
jaroslav@238: 
jaroslav@238: /**
jaroslav@238:  *
jaroslav@238:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@238:  */
jaroslav@238: @Model(className = "ChatModel", targetId = "", properties = {
jaroslav@238:     @Property(name = "user", type = String.class),
jaroslav@238:     @Property(name = "comment", type = String.class),
jaroslav@238:     @Property(name = "url", type = String.class),
jaroslav@238:     @Property(name = "msgs", type = Message.class, array = true)
jaroslav@238: })
jaroslav@238: class ChatClient {
jaroslav@238:     @ComputedProperty
jaroslav@238:     static boolean sendEnabled(String user, String comment) {
jaroslav@238:         boolean res = user != null && comment != null && !user.isEmpty() && !comment.isEmpty();
jaroslav@238:         return res;
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     @Function
jaroslav@238:     static void submit(ChatModel m) {
jaroslav@238:         if (!sendEnabled(m.getUser(), m.getComment())) {
jaroslav@238:             return;
jaroslav@238:         }
jaroslav@238:         Message msg = new Message();
jaroslav@238:         msg.setUser(m.getUser());
jaroslav@238:         msg.setComment(m.getComment());
jaroslav@238:         m.postComment(m.getUrl(), msg);
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     static void cantChat(ChatModel model, Exception err) {
jaroslav@238:         model.getMsgs().add(new Message("System", err.getMessage(), 0));
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     
jaroslav@238:     @OnReceive(url = "{url}/chat", method = "POST", data = Message.class, onError = "cantChat")
jaroslav@238:     static void postComment(ChatModel m, Message addedMessage) {
jaroslav@238:         if (addedMessage.getComment().equals(m.getComment())) {
jaroslav@238:             m.setComment("");
jaroslav@238:         }
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     @OnReceive(url = "{url}/chat?since=0")
jaroslav@238:     static void initialRead(ChatModel m, Query q) {
jaroslav@238:         m.getMsgs().clear();
jaroslav@238:         m.getMsgs().addAll(q.getMessages());
jaroslav@238:         moreMessages(m);
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     @OnReceive(url = "{url}/chat?since={since}")
jaroslav@238:     static void updateMsgs(ChatModel m, Query q) {
jaroslav@238:         m.getMsgs().addAll(q.getMessages());
jaroslav@238:         moreMessages(m);
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     private static void moreMessages(ChatModel m) {
jaroslav@238:         long now = 0;
jaroslav@238:         for (Message msg : m.getMsgs()) {
jaroslav@238:             if (now < msg.getSince()) {
jaroslav@238:                 now = msg.getSince();
jaroslav@238:             }
jaroslav@238:         }
jaroslav@238:         m.updateMsgs(m.getUrl(), "" + (now + 1));
jaroslav@238:     }
jaroslav@238:     
jaroslav@238:     public static void onPageLoad() {
jaroslav@238:         ChatModel chm = new ChatModel();
jaroslav@238:         chm.setUrl("http://localhost:8080");
jaroslav@238:         Message m = new Message();
jaroslav@238:         m.setComment("Waiting for messages from the server...");
jaroslav@238:         m.setUser("system");
jaroslav@238:         chm.getMsgs().add(m);
jaroslav@238:         chm.applyBindings();
jaroslav@238:         chm.initialRead(chm.getUrl());        
jaroslav@238:     }
jaroslav@238: }