Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License") + you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.openmeetings.web.user.chat; import static org.apache.openmeetings.core.util.ChatWebSocketHelper.ID_ALL; import static org.apache.openmeetings.core.util.ChatWebSocketHelper.ID_ROOM_PREFIX; import static org.apache.openmeetings.core.util.ChatWebSocketHelper.ID_USER_PREFIX; import static org.apache.openmeetings.web.app.WebSession.getUserId; import static org.apache.openmeetings.web.room.RoomPanel.isModerator; import java.util.Arrays; import java.util.Date; import java.util.function.BooleanSupplier; import java.util.function.Predicate; import org.apache.openmeetings.core.util.ChatWebSocketHelper; import org.apache.openmeetings.db.dao.basic.ChatDao; import org.apache.openmeetings.db.dao.room.RoomDao; import org.apache.openmeetings.db.dao.user.UserDao; import org.apache.openmeetings.db.entity.basic.ChatMessage; import org.apache.openmeetings.db.entity.basic.Client; import org.apache.openmeetings.db.entity.room.Room; import org.apache.openmeetings.db.entity.user.User; import org.apache.openmeetings.web.app.ClientManager; import org.apache.openmeetings.web.common.MainPanel; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.attributes.AjaxRequestAttributes; import org.apache.wicket.ajax.attributes.IAjaxCallListener; import org.apache.wicket.ajax.form.AjaxFormSubmitBehavior; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.html.form.HiddenField; import org.apache.wicket.model.Model; import org.apache.wicket.spring.injection.annot.SpringBean; import org.apache.wicket.util.string.Strings; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.github.openjson.JSONObject; import com.googlecode.wicket.jquery.ui.form.button.AjaxButton; import com.googlecode.wicket.jquery.ui.plugins.wysiwyg.WysiwygEditor; public class ChatForm extends Form<Void> { private static final long serialVersionUID = 1L; private static final Logger log = LoggerFactory.getLogger(ChatForm.class); private final HiddenField<String> activeTab = new HiddenField<>("activeTab", Model.of("")); @SpringBean private ClientManager cm; @SpringBean private ChatDao chatDao; @SpringBean private UserDao userDao; @SpringBean private RoomDao roomDao; public ChatForm(String id) { super(id); final ChatToolbar toolbar = new ChatToolbar("toolbarContainer", this); final WysiwygEditor chatMessage = new WysiwygEditor("chatMessage", Model.of(""), toolbar); add(toolbar, activeTab.add(new AjaxFormSubmitBehavior(this, "change") { private static final long serialVersionUID = 1L; @Override protected void onSubmit(AjaxRequestTarget target) { toolbar.update(target); } }), chatMessage.setOutputMarkupId(true), new AjaxButton("send") { private static final long serialVersionUID = 1L; @Override protected void updateAjaxAttributes(AjaxRequestAttributes attributes) { super.updateAjaxAttributes(attributes); attributes.getAjaxCallListeners().add(new IAjaxCallListener() { @Override public CharSequence getPrecondition(Component component) { return "return Chat.validate();"; } }); } private Chat getChat() { return findParent(Chat.class); } @Override protected void onSubmit(AjaxRequestTarget target) { final String txt = chatMessage.getDefaultModelObjectAsString(); if (Strings.isEmpty(txt)) { return; } final ChatMessage m = new ChatMessage(); m.setMessage(txt); m.setSent(new Date()); m.setFromUser(userDao.get(getUserId())); m.setFromName(getClient().getUser().getDisplayName()); if (!process(() -> getChat().isShowDashboardChat(), r -> { if (cm.isInRoom(r.getId(), getUserId())) { m.setToRoom(r); } else { log.error("It seems like we are being hacked!!!!"); return false; } m.setNeedModeration( r.isChatModerated() && !isModerator(cm, m.getFromUser().getId(), r.getId())); return true; }, u -> { m.setToUser(u); return true; })) { return; } ; chatDao.update(m); JSONObject msg = getChat().getMessage(Arrays.asList(m)); if (m.getToRoom() != null) { ChatWebSocketHelper.sendRoom(m, msg); } else if (m.getToUser() != null) { ChatWebSocketHelper.sendUser(getUserId(), m, msg); msg = Chat.getMessage(m.getToUser(), Arrays.asList(m)); ChatWebSocketHelper.sendUser(m.getToUser().getId(), m, msg); } else { ChatWebSocketHelper.sendAll(m, msg); } chatMessage.setDefaultModelObject(""); target.appendJavaScript("Chat.clean();"); }; }); } private Client getClient() { return findParent(MainPanel.class).getClient(); } public String getScope() { return activeTab.getModelObject(); } boolean process(BooleanSupplier processAll, Predicate<Room> processRoom, Predicate<User> processUser) { try { final String scope = getScope(); if (Strings.isEmpty(scope) || ID_ALL.equals(scope)) { return processAll.getAsBoolean(); } else if (scope.startsWith(ID_ROOM_PREFIX)) { Room r = roomDao.get(Long.parseLong(scope.substring(ID_ROOM_PREFIX.length()))); if (r != null) { return processRoom.test(r); } } else if (scope.startsWith(ID_USER_PREFIX)) { User u = userDao.get(Long.parseLong(scope.substring(ID_USER_PREFIX.length()))); if (u != null) { return processUser.test(u); } } } catch (Exception e) { //no-op } return false; } }