/*
* Symphony - A modern community (forum/SNS/blog) platform written in Java.
* Copyright (C) 2012-2017, b3log.org & hacpai.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.b3log.symphony.processor.channel;
import freemarker.template.Template;
import org.apache.commons.lang.StringUtils;
import org.b3log.latke.Keys;
import org.b3log.latke.Latkes;
import org.b3log.latke.ioc.LatkeBeanManager;
import org.b3log.latke.ioc.LatkeBeanManagerImpl;
import org.b3log.latke.logging.Level;
import org.b3log.latke.logging.Logger;
import org.b3log.latke.model.User;
import org.b3log.latke.repository.jdbc.JdbcRepository;
import org.b3log.latke.service.LangPropsService;
import org.b3log.latke.service.LangPropsServiceImpl;
import org.b3log.latke.util.Locales;
import org.b3log.latke.util.Strings;
import org.b3log.symphony.model.*;
import org.b3log.symphony.processor.SkinRenderer;
import org.b3log.symphony.repository.ArticleRepository;
import org.b3log.symphony.service.RoleQueryService;
import org.b3log.symphony.service.TimelineMgmtService;
import org.b3log.symphony.service.UserQueryService;
import org.b3log.symphony.util.Emotions;
import org.b3log.symphony.util.Symphonys;
import org.json.JSONObject;
import org.jsoup.Jsoup;
import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.io.StringWriter;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* Article channel.
*
* @author <a href="http://88250.b3log.org">Liang Ding</a>
* @version 2.3.9.6, Dec 17, 2016
* @since 1.3.0
*/
@ServerEndpoint(value = "/article-channel", configurator = Channels.WebSocketConfigurator.class)
public class ArticleChannel {
/**
* Session set.
*/
public static final Set<Session> SESSIONS = Collections.newSetFromMap(new ConcurrentHashMap());
/**
* Article viewing map <articleId, count>.
*/
public static final Map<String, Integer> ARTICLE_VIEWS
= Collections.synchronizedMap(new HashMap<String, Integer>());
/**
* Logger.
*/
private static final Logger LOGGER = Logger.getLogger(ArticleChannel.class.getName());
/**
* Notifies the specified article heat message to browsers.
*
* @param message the specified message, for example,
* "articleId": "",
* "operation": "" // "+"/"-"
*/
public static void notifyHeat(final JSONObject message) {
message.put(Common.TYPE, Article.ARTICLE_T_HEAT);
final String msgStr = message.toString();
for (final Session session : SESSIONS) {
final String viewingArticleId = (String) Channels.getHttpParameter(session, Article.ARTICLE_T_ID);
if (Strings.isEmptyOrNull(viewingArticleId)
|| !viewingArticleId.equals(message.optString(Article.ARTICLE_T_ID))) {
continue;
}
if (session.isOpen()) {
session.getAsyncRemote().sendText(msgStr);
}
}
}
/**
* Notifies the specified comment message to browsers.
*
* @param message the specified message
*/
public static void notifyComment(final JSONObject message) {
message.put(Common.TYPE, Comment.COMMENT);
final LatkeBeanManager beanManager = LatkeBeanManagerImpl.getInstance();
final UserQueryService userQueryService = beanManager.getReference(UserQueryService.class);
final ArticleRepository articleRepository = beanManager.getReference(ArticleRepository.class);
final RoleQueryService roleQueryService = beanManager.getReference(RoleQueryService.class);
final LangPropsService langPropsService = beanManager.getReference(LangPropsServiceImpl.class);
for (final Session session : SESSIONS) {
final String viewingArticleId = (String) Channels.getHttpParameter(session, Article.ARTICLE_T_ID);
if (Strings.isEmptyOrNull(viewingArticleId)
|| !viewingArticleId.equals(message.optString(Article.ARTICLE_T_ID))) {
continue;
}
final int articleType = Integer.valueOf(Channels.getHttpParameter(session, Article.ARTICLE_TYPE));
final JSONObject user = (JSONObject) Channels.getHttpSessionAttribute(session, User.USER);
final boolean isLoggedIn = null != user;
try {
if (Article.ARTICLE_TYPE_C_DISCUSSION == articleType) {
if (!isLoggedIn) {
continue;
}
final String userName = user.optString(User.USER_NAME);
final String userRole = user.optString(User.USER_ROLE);
final JSONObject article = articleRepository.get(viewingArticleId);
if (null == article) {
continue;
}
final String articleAuthorId = article.optString(Article.ARTICLE_AUTHOR_ID);
final String userId = user.optString(Keys.OBJECT_ID);
if (!userId.equals(articleAuthorId)) {
final String articleContent = article.optString(Article.ARTICLE_CONTENT);
final Set<String> userNames = userQueryService.getUserNames(articleContent);
boolean invited = false;
for (final String inviteUserName : userNames) {
if (inviteUserName.equals(userName)) {
invited = true;
break;
}
}
if (Role.ROLE_ID_C_ADMIN.equals(userRole)) {
invited = true;
}
if (!invited) {
continue; // next session
}
}
}
message.put(Comment.COMMENT_T_NICE, false);
message.put(Common.REWARED_COUNT, 0);
message.put(Comment.COMMENT_T_VOTE, -1);
message.put(Common.REWARDED, false);
message.put(Comment.COMMENT_REVISION_COUNT, 1);
final Map dataModel = new HashMap();
dataModel.put(Common.IS_LOGGED_IN, isLoggedIn);
dataModel.put(Common.CURRENT_USER, user);
dataModel.put(Common.CSRF_TOKEN, Channels.getHttpSessionAttribute(session, Common.CSRF_TOKEN));
Keys.fillServer(dataModel);
dataModel.put(Comment.COMMENT, message);
String templateDirName = Symphonys.get("skinDirName");
if (isLoggedIn) {
dataModel.putAll(langPropsService.getAll(Locales.getLocale(user.optString(UserExt.USER_LANGUAGE))));
final String userId = user.optString(Keys.OBJECT_ID);
final Map<String, JSONObject> permissions
= roleQueryService.getUserPermissionsGrantMap(userId);
dataModel.put(Permission.PERMISSIONS, permissions);
templateDirName = user.optString(UserExt.USER_SKIN);
} else {
dataModel.putAll(langPropsService.getAll(Locales.getLocale()));
final Map<String, JSONObject> permissions
= roleQueryService.getPermissionsGrantMap(Role.ROLE_ID_C_VISITOR);
dataModel.put(Permission.PERMISSIONS, permissions);
}
final Template template = SkinRenderer.getTemplate(templateDirName, "common/comment.ftl",
false, user);
final StringWriter stringWriter = new StringWriter();
template.process(dataModel, stringWriter);
stringWriter.close();
message.put("cmtTpl", stringWriter.toString());
final String msgStr = message.toString();
if (session.isOpen()) {
session.getAsyncRemote().sendText(msgStr);
}
} catch (final Exception e) {
LOGGER.log(Level.ERROR, "Notify comment error", e);
} finally {
JdbcRepository.dispose();
}
}
}
/**
* Called when the socket connection with the browser is established.
*
* @param session session
*/
@OnOpen
public void onConnect(final Session session) {
final String articleId = (String) Channels.getHttpParameter(session, Article.ARTICLE_T_ID);
if (StringUtils.isBlank(articleId)) {
return;
}
SESSIONS.add(session);
synchronized (ARTICLE_VIEWS) {
if (!ARTICLE_VIEWS.containsKey(articleId)) {
ARTICLE_VIEWS.put(articleId, 1);
} else {
final int count = ARTICLE_VIEWS.get(articleId);
ARTICLE_VIEWS.put(articleId, count + 1);
}
}
final JSONObject message = new JSONObject();
message.put(Article.ARTICLE_T_ID, articleId);
message.put(Common.OPERATION, "+");
ArticleListChannel.notifyHeat(message);
notifyHeat(message);
final JSONObject user = (JSONObject) Channels.getHttpSessionAttribute(session, User.USER);
if (null == user) {
return;
}
final String userName = user.optString(User.USER_NAME);
// Timeline
final LatkeBeanManager beanManager = LatkeBeanManagerImpl.getInstance();
final ArticleRepository articleRepository = beanManager.getReference(ArticleRepository.class);
final LangPropsService langPropsService = beanManager.getReference(LangPropsServiceImpl.class);
final TimelineMgmtService timelineMgmtService = beanManager.getReference(TimelineMgmtService.class);
try {
final JSONObject article = articleRepository.get(articleId);
if (null == article) {
return;
}
String articleTitle = Jsoup.parse(article.optString(Article.ARTICLE_TITLE)).text();
articleTitle = Emotions.convert(articleTitle);
final String articlePermalink = Latkes.getServePath() + article.optString(Article.ARTICLE_PERMALINK);
final JSONObject timeline = new JSONObject();
timeline.put(Common.USER_ID, user.optString(Keys.OBJECT_ID));
timeline.put(Common.TYPE, Article.ARTICLE);
String content = langPropsService.get("timelineInArticleLabel");
content = content.replace("{user}", "<a target='_blank' rel='nofollow' href='" + Latkes.getServePath()
+ "/member/" + userName + "'>" + userName + "</a>")
.replace("{article}", "<a target='_blank' rel='nofollow' href='" + articlePermalink
+ "'>" + articleTitle + "</a>");
timeline.put(Common.CONTENT, content);
timelineMgmtService.addTimeline(timeline);
} catch (final Exception e) {
LOGGER.log(Level.ERROR, "Timeline error", e);
} finally {
JdbcRepository.dispose();
}
}
/**
* Called when the connection closed.
*
* @param session session
* @param closeReason close reason
*/
@OnClose
public void onClose(final Session session, final CloseReason closeReason) {
removeSession(session);
}
/**
* Called when a message received from the browser.
*
* @param message message
*/
@OnMessage
public void onMessage(final String message) {
}
/**
* Called in case of an error.
*
* @param session session
* @param error error
*/
@OnError
public void onError(final Session session, final Throwable error) {
removeSession(session);
}
/**
* Removes the specified session.
*
* @param session the specified session
*/
private void removeSession(final Session session) {
SESSIONS.remove(session);
final String articleId = (String) Channels.getHttpParameter(session, Article.ARTICLE_T_ID);
if (StringUtils.isBlank(articleId)) {
return;
}
synchronized (ARTICLE_VIEWS) {
if (!ARTICLE_VIEWS.containsKey(articleId)) {
return;
}
final int count = ARTICLE_VIEWS.get(articleId);
final int newCount = count - 1;
if (newCount < 1) {
ARTICLE_VIEWS.remove(articleId);
} else {
ARTICLE_VIEWS.put(articleId, newCount);
}
}
final JSONObject message = new JSONObject();
message.put(Article.ARTICLE_T_ID, articleId);
message.put(Common.OPERATION, "-");
ArticleListChannel.notifyHeat(message);
notifyHeat(message);
final JSONObject user = (JSONObject) Channels.getHttpSessionAttribute(session, User.USER);
if (null == user) {
return;
}
final String userName = user.optString(User.USER_NAME);
// Timeline
final LatkeBeanManager beanManager = LatkeBeanManagerImpl.getInstance();
final ArticleRepository articleRepository = beanManager.getReference(ArticleRepository.class);
final LangPropsService langPropsService = beanManager.getReference(LangPropsServiceImpl.class);
final TimelineMgmtService timelineMgmtService = beanManager.getReference(TimelineMgmtService.class);
try {
final JSONObject article = articleRepository.get(articleId);
if (null == article) {
return;
}
String articleTitle = Jsoup.parse(article.optString(Article.ARTICLE_TITLE)).text();
articleTitle = Emotions.convert(articleTitle);
final String articlePermalink = Latkes.getServePath() + article.optString(Article.ARTICLE_PERMALINK);
final JSONObject timeline = new JSONObject();
timeline.put(Common.USER_ID, user.optString(Keys.OBJECT_ID));
timeline.put(Common.TYPE, Article.ARTICLE);
String content = langPropsService.get("timelineOutArticleLabel");
content = content.replace("{user}", "<a target='_blank' rel='nofollow' href='" + Latkes.getServePath()
+ "/member/" + userName + "'>" + userName + "</a>")
.replace("{article}", "<a target='_blank' rel='nofollow' href='" + articlePermalink
+ "'>" + articleTitle + "</a>");
timeline.put(Common.CONTENT, content);
timelineMgmtService.addTimeline(timeline);
} catch (final Exception e) {
LOGGER.log(Level.ERROR, "Timeline error", e);
} finally {
JdbcRepository.dispose();
}
}
}