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/*
* Copyright (C) 2008-2017, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.server;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.juick.Message;
import com.juick.User;
import com.juick.model.AnonymousUser;
import com.juick.service.MessagesService;
import com.juick.service.SubscriptionService;
import com.juick.service.UserService;
import com.juick.service.component.*;
import com.juick.util.MessageUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collectors;
/**
* @author Ugnich Anton
*/
@Component
public class ServerManager implements NotificationListener {
private static Logger logger = LoggerFactory.getLogger(ServerManager.class);
@Inject
private ObjectMapper jsonMapper;
@Inject
private MessagesService messagesService;
@Inject
private SubscriptionService subscriptionService;
@Inject
private UserService userService;
private CopyOnWriteArrayList<EventSession> sessions = new CopyOnWriteArrayList<>();
@Value("${service_user:juick}")
private String serviceUsername;
private User serviceUser;
@PostConstruct
public void init() {
serviceUser = userService.getUserByName(serviceUsername);
}
private void onJuickPM(final User to, final com.juick.Message jmsg) {
messageEvent(jmsg, Collections.singletonList(to));
}
private void onJuickMessagePost(final com.juick.Message jmsg, List<User> subscribedUsers) {
messageEvent(jmsg, subscribedUsers);
messageEvent(jmsg, Collections.singletonList(AnonymousUser.INSTANCE));
}
private void onJuickMessageReply(final com.juick.Message jmsg, final List<User> subscribedUsers) {
messageEvent(jmsg, subscribedUsers);
messageEvent(jmsg, Collections.singletonList(AnonymousUser.INSTANCE));
}
@Override
public void processMessageEvent(MessageEvent event) {
com.juick.Message jmsg = event.getMessage();
List<User> subscribedUsers = event.getUsers();
if (jmsg.isService()) {
readEvent(jmsg, Collections.singletonList(serviceUser));
return;
}
if (MessageUtils.isPM(jmsg)) {
onJuickPM(jmsg.getTo(), jmsg);
} else if (!MessageUtils.isReply(jmsg)) {
onJuickMessagePost(jmsg, subscribedUsers);
} else {
// to get quote and attachment
Message op = messagesService.getMessage(jmsg.getMid()).orElseThrow(IllegalStateException::new);
com.juick.Message reply = messagesService.getReply(jmsg.getMid(), jmsg.getRid());
subscriptionService.getUsersSubscribedToComments(op, reply, true).stream()
.filter(u -> userService.isReplyToBL(u, reply))
.forEach(b -> messagesService.setLastReadComment(b, reply.getMid(), reply.getRid()));
onJuickMessageReply(reply, subscribedUsers);
}
messageEvent(jmsg, Collections.singletonList(serviceUser));
}
@Override
public void processSubscribeEvent(SubscribeEvent subscribeEvent) {
}
@Override
public void processLikeEvent(LikeEvent likeEvent) {
}
@Override
public void processPingEvent(PingEvent pingEvent) {
}
@Override
public void processMessageReadEvent(MessageReadEvent messageReadEvent) {
User user = messageReadEvent.getUser();
Message source = messageReadEvent.getMessage();
logger.info("Message read event from {} for {}", user.getUid(), source.getMid());
Message serviceMessage = new Message();
serviceMessage.setService(true);
serviceMessage.setUser(user);
serviceMessage.setMid(source.getMid());
serviceMessage.setUnread(false);
readEvent(serviceMessage, Collections.singletonList(serviceUser));
}
@Override
public void processTopEvent(TopEvent topEvent) {
User topUser = topEvent.getMessage().getUser();
topEvent(topEvent.getMessage(), Arrays.asList(topUser, serviceUser));
}
public void topEvent(Message msg, List<User> subscribers){
sendSseEvent(msg, "top", subscribers);
}
public void readEvent(Message msg, List<User> subscribers){
sendSseEvent(msg, "read", subscribers);
}
public void messageEvent(Message msg, List<User> subscribers){
sendSseEvent(msg, "msg", subscribers);
}
private void sendSseEvent(Message msg, String name, List<User> subscribers) {
List<EventSession> deadEmitters = new ArrayList<>();
this.sessions.stream().filter(s -> subscribers.contains(s.user)).forEach(session -> {
try {
SseEmitter.SseEventBuilder builder = SseEmitter.event()
.name(name)
.data(msg);
session.getEmitter().send(builder);
} catch (Exception e) {
deadEmitters.add(session);
}
});
this.sessions.removeAll(deadEmitters);
}
public static class EventSession {
private User user;
private SseEmitter emitter;
public EventSession(User user, SseEmitter sseEmitter) {
this.user = user;
this.emitter = sseEmitter;
}
public User getUser() {
return user;
}
public SseEmitter getEmitter() {
return emitter;
}
}
public CopyOnWriteArrayList<EventSession> getSessions() {
return sessions;
}
@Scheduled(fixedRate = 30000)
public void ping() {
Message ping = new Message();
ping.setService(true);
sendSseEvent(ping, "ping", getSessions().stream().map(s -> s.user)
.distinct().collect(Collectors.toList()));
}
}
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