server: merge xmpp

1 files changed, 710 insertions, 0 deletions

diff --git a/juick-server/src/main/java/com/juick/server/XMPPBot.java b/juick-server/src/main/java/com/juick/server/XMPPBot.java
new file mode 100644
index 00000000..21138607
--- /dev/null
+++ b/juick-server/src/main/java/com/juick/server/XMPPBot.java
@@ -0,0 +1,710 @@
+/*
+ * 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.juick.Tag;
+import com.juick.User;
+import com.juick.xmpp.s2s.StanzaListener;
+import com.juick.formatters.PlainTextFormatter;
+import com.juick.server.helpers.TagStats;
+import com.juick.server.protocol.annotation.UserCommand;
+import com.juick.service.*;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.math.NumberUtils;
+import org.apache.commons.lang3.reflect.MethodUtils;
+import org.ocpsoft.prettytime.PrettyTime;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import rocks.xmpp.addr.Jid;
+import rocks.xmpp.core.stanza.model.*;
+import rocks.xmpp.core.stanza.model.client.ClientMessage;
+import rocks.xmpp.core.stanza.model.client.ClientPresence;
+import rocks.xmpp.core.stanza.model.errors.Condition;
+
+import javax.annotation.PostConstruct;
+import javax.inject.Inject;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+/**
+ *
+ * @author ugnich
+ */
+@Component
+public class XMPPBot implements StanzaListener, AutoCloseable {
+
+    private static final Logger logger = LoggerFactory.getLogger(XMPPBot.class);
+
+    @Inject
+    private XMPPServer xmpp;
+    @Inject
+    private XMPPConnection router;
+    @Value("${xmppbot_jid}")
+    private Jid jid;
+
+    private PrettyTime pt;
+
+    @Inject
+    private MessagesService messagesService;
+    @Inject
+    private UserService userService;
+    @Inject
+    private TagService tagService;
+    @Inject
+    private PMQueriesService pmQueriesService;
+    @Inject
+    private ShowQueriesService showQueriesService;
+    @Inject
+    private PrivacyQueriesService privacyQueriesService;
+    @Inject
+    private SubscriptionService subscriptionService;
+
+    @PostConstruct
+    public void init() {
+        xmpp.addStanzaListener(this);
+        broadcastPresence(null);
+        pt = new PrettyTime(new Locale("ru"));
+    }
+
+    public Jid getJid() {
+        return jid;
+    }
+
+    public boolean incomingPresence(Presence p) {
+        final String username = p.getTo().getLocal();
+        final boolean toJuick = username.equals(jid.getLocal());
+
+        if (p.getType() == null) {
+            Presence reply = new Presence();
+            reply.setFrom(p.getTo().asBareJid());
+            reply.setTo(p.getFrom().asBareJid());
+            reply.setType(Presence.Type.UNSUBSCRIBE);
+            xmpp.sendOut(ClientPresence.from(reply));
+            return true;
+        } else if (p.getType().equals(Presence.Type.PROBE)) {
+            int uid_to = 0;
+            if (!toJuick) {
+                uid_to = userService.getUIDbyName(username);
+            }
+
+            if (toJuick || uid_to > 0) {
+                Presence reply = new Presence();
+                reply.setFrom(p.getTo().withResource(jid.getResource()));
+                reply.setTo(p.getFrom());
+                reply.setPriority((byte)10);
+                if (!userService.getActiveJIDs().contains(p.getFrom().asBareJid().toEscapedString())) {
+                    reply.setStatus("Send ON to enable notifications");
+                }
+                xmpp.sendOut(ClientPresence.from(reply));
+            } else {
+                Presence reply = new Presence();
+                reply.setFrom(p.getTo());
+                reply.setTo(p.getFrom());
+                reply.setType(Presence.Type.ERROR);
+                reply.setId(p.getId());
+                reply.setError(new StanzaError(StanzaError.Type.CANCEL, Condition.ITEM_NOT_FOUND));
+                xmpp.sendOut(ClientPresence.from(reply));
+                return true;
+            }
+            return true;
+        } else if (p.getType().equals(Presence.Type.SUBSCRIBE)) {
+            boolean canSubscribe = false;
+            if (toJuick) {
+                canSubscribe = true;
+            } else {
+                int uid_to = userService.getUIDbyName(username);
+                if (uid_to > 0) {
+                    pmQueriesService.addPMinRoster(uid_to, p.getFrom().asBareJid().toEscapedString());
+                    canSubscribe = true;
+                }
+            }
+
+            if (canSubscribe) {
+                Presence reply = new Presence();
+                reply.setFrom(p.getTo());
+                reply.setTo(p.getFrom());
+                reply.setType(Presence.Type.SUBSCRIBED);
+                xmpp.sendOut(ClientPresence.from(reply));
+
+                reply.setFrom(reply.getFrom().withResource(jid.getResource()));
+                reply.setPriority((byte) 10);
+                reply.setType(null);
+                xmpp.sendOut(ClientPresence.from(reply));
+
+                return true;
+            } else {
+                Presence reply = new Presence();
+                reply.setFrom(p.getTo());
+                reply.setTo(p.getFrom());
+                reply.setType(Presence.Type.ERROR);
+                reply.setId(p.getId());
+                reply.setError(new StanzaError(StanzaError.Type.CANCEL, Condition.ITEM_NOT_FOUND));
+                xmpp.sendOut(ClientPresence.from(reply));
+                return true;
+            }
+        } else if (p.getType().equals(Presence.Type.UNSUBSCRIBE)) {
+            if (!toJuick) {
+                int uid_to = userService.getUIDbyName(username);
+                if (uid_to > 0) {
+                    pmQueriesService.removePMinRoster(uid_to, p.getFrom().asBareJid().toEscapedString());
+                }
+            }
+
+            Presence reply = new Presence();
+            reply.setFrom(p.getTo());
+            reply.setTo(p.getFrom());
+            reply.setType(Presence.Type.UNSUBSCRIBED);
+            xmpp.sendOut(ClientPresence.from(reply));
+        }
+
+        return false;
+    }
+
+    public boolean incomingMessage(Message msg) {
+        if (msg.getType() != null && msg.getType().equals(Message.Type.ERROR)) {
+            StanzaError error = msg.getError();
+            if (error != null && error.getCondition().equals(Condition.RESOURCE_CONSTRAINT)) {
+                // offline query is full, deactivating this jid
+                if (userService.setActiveStatusForJID(msg.getFrom().toEscapedString(), UserService.ActiveStatus.Inactive)) {
+                    logger.info("{} is inactive now", msg.getFrom());
+                    return true;
+                }
+            }
+            return false;
+        }
+        if (StringUtils.isBlank(msg.getBody())) {
+            return false;
+        }
+        String username = msg.getTo().getLocal();
+
+        User user_from;
+        String signuphash = StringUtils.EMPTY;
+        user_from = userService.getUserByJID(msg.getFrom().asBareJid().toEscapedString());
+        if (user_from == null) {
+            signuphash = userService.getSignUpHashByJID(msg.getFrom().asBareJid().toEscapedString());
+        }
+
+        if (user_from == null) {
+            Message reply = new Message();
+            reply.setFrom(msg.getTo());
+            reply.setTo(msg.getFrom());
+            reply.setType(Message.Type.CHAT);
+            if (username.equals(jid.getLocal())) {
+                reply.setBody("Для того, чтобы начать пользоваться сервисом, пожалуйста пройдите быструю регистрацию: http://juick.com/signup?type=xmpp&hash=" + signuphash + "\nЕсли у вас уже есть учетная запись на Juick, вы сможете присоединить этот JabberID к ней.\n\nTo start using Juick, please sign up: http://juick.com/signup?type=xmpp&hash=" + signuphash + "\nIf you already have an account on Juick, you will be proposed to attach this JabberID to your existing account.");
+            } else {
+                reply.setBody("Внимание, системное сообщение!\nВаш JabberID не обнаружен в списке доверенных. Для того, чтобы отправить сообщение пользователю " + username + "@juick.com, пожалуйста зарегистрируйте свой JabberID в системе: http://juick.com/signup?type=xmpp&hash=" + signuphash + "\nЕсли у вас уже есть учетная запись на Juick, вы сможете присоединить этот JabberID к ней.\n\nWarning, system message!\nYour JabberID is not found in our server's white list. To send a message to " + username + "@juick.com, please sign up: http://juick.com/signup?type=xmpp&hash=" + signuphash + "\nIf you already have an account on Juick, you will be proposed to attach this JabberID to your existing account.");
+            }
+            xmpp.sendOut(ClientMessage.from(reply));
+            return true;
+        }
+
+        if (username.equals(jid.getLocal())) {
+            try {
+                return incomingMessageJuick(user_from, msg);
+            } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
+               return false;
+            }
+        }
+
+        int uid_to = userService.getUIDbyName(username);
+
+        if (uid_to == 0) {
+            Message reply = new Message();
+            reply.setFrom(msg.getTo());
+            reply.setTo(msg.getFrom());
+            reply.setType(Message.Type.ERROR);
+            reply.setId(msg.getId());
+            reply.setError(new StanzaError(StanzaError.Type.CANCEL, Condition.ITEM_NOT_FOUND));
+            xmpp.sendOut(ClientMessage.from(reply));
+            return true;
+        }
+
+        boolean success = false;
+        if (!userService.isInBLAny(uid_to, user_from.getUid())) {
+            success = pmQueriesService.createPM(user_from.getUid(), uid_to, msg.getBody());
+        }
+
+        if (success) {
+            Message m = new Message();
+            m.setFrom(jid.asBareJid());
+            m.setTo(Jid.of(Integer.toString(uid_to), "push.juick.com", null));
+            com.juick.Message jmsg = new com.juick.Message();
+            jmsg.setUser(user_from);
+            jmsg.setText(msg.getBody());
+            m.addExtension(jmsg);
+            router.sendStanza(m);
+
+            m.setTo(Jid.of(Integer.toString(uid_to), "ws.juick.com", null));
+            router.sendStanza(m);
+
+            List<String> jids;
+            boolean inroster = false;
+            jids = userService.getJIDsbyUID(uid_to);
+            for (String userJid : jids) {
+                Message mm = new Message();
+                mm.setTo(Jid.of(userJid));
+                mm.setType(Message.Type.CHAT);
+                inroster = pmQueriesService.havePMinRoster(user_from.getUid(), userJid);
+                if (inroster) {
+                    mm.setFrom(Jid.of(jmsg.getUser().getName(), "juick.com", "Juick"));
+                    mm.setBody(msg.getBody());
+                } else {
+                    mm.setFrom(jid);
+                    mm.setBody("Private message from @" + jmsg.getUser().getName() + ":\n" + msg.getBody());
+                }
+                xmpp.sendOut(ClientMessage.from(mm));
+            }
+        } else {
+            Message reply = new Message();
+            reply.setFrom(msg.getTo());
+            reply.setTo(msg.getFrom());
+            reply.setType(Message.Type.ERROR);
+            reply.setId(msg.getId());
+            reply.setError(new StanzaError(StanzaError.Type.CANCEL, Condition.NOT_ALLOWED));
+            xmpp.sendOut(ClientMessage.from(reply));
+        }
+
+        return false;
+    }
+
+    public Optional<String> processCommand(User user, Jid from, String input) throws InvocationTargetException,
+            IllegalAccessException, NoSuchMethodException {
+        Optional<Method> cmd = MethodUtils.getMethodsListWithAnnotation(getClass(), UserCommand.class).stream()
+                .filter(m -> Pattern.compile(m.getAnnotation(UserCommand.class).pattern(),
+                        m.getAnnotation(UserCommand.class).patternFlags()).matcher(input).matches())
+                .findFirst();
+        if (cmd.isPresent()) {
+            Matcher matcher = Pattern.compile(cmd.get().getAnnotation(UserCommand.class).pattern(),
+                    cmd.get().getAnnotation(UserCommand.class).patternFlags()).matcher(input);
+            List<String> groups = new ArrayList<>();
+            while (matcher.find()) {
+                for (int i = 1; i <= matcher.groupCount(); i++) {
+                    groups.add(matcher.group(i));
+                }
+            }
+            return Optional.of((String) getClass().getMethod(cmd.get().getName(), User.class, Jid.class, String[].class)
+                    .invoke(this, user, from, groups.toArray(new String[groups.size()])));
+        }
+        return Optional.empty();
+    }
+    public boolean incomingMessageJuick(User user_from, Message msg) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
+        String command = msg.getBody().trim();
+        int commandlen = command.length();
+
+        // COMPATIBILITY
+        if (commandlen > 7 && command.substring(0, 3).equalsIgnoreCase("PM ")) {
+            command = command.substring(3).trim();
+        }
+
+        Optional<String> result = processCommand(user_from, msg.getFrom(), command);
+        result.ifPresent(r -> sendReply(msg.getFrom(), r));
+        return result.isPresent();
+    }
+
+    @UserCommand(pattern = "^ping$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "PING - returns you a PONG")
+    public String commandPing(User user, Jid from, String[] input) {
+        Presence p = new Presence(from);
+        p.setFrom(jid);
+        p.setPriority((byte) 10);
+        xmpp.sendOut(ClientPresence.from(p));
+        return "PONG";
+    }
+
+    @UserCommand(pattern = "^help$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "HELP - returns this help message")
+    public String commandHelp(User user, Jid from, String[] input) {
+        return Arrays.stream(getClass().getDeclaredMethods())
+                .filter(m -> m.isAnnotationPresent(UserCommand.class))
+                .map(m -> m.getAnnotation(UserCommand.class).help())
+                .collect(Collectors.joining("\n"));
+    }
+
+    @UserCommand(pattern = "^login$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "LOGIN - log in to Juick website")
+    public String commandLogin(User user_from, Jid from, String[] input) {
+        return "http://juick.com/login?hash=" + userService.getHashByUID(user_from.getUid());
+    }
+    @UserCommand(pattern = "^\\@(\\S+)\\s+([\\s\\S]+)$", help = "@username message - send PM to username")
+    public String commandPM(User user_from, Jid from, String... arguments) {
+        String body = arguments[1];
+        int ret = 0;
+
+        User user_to = userService.getUserByName(arguments[0]);
+        List<String> jids_to = null;
+        boolean haveInRoster = false;
+
+        if (user_to.getUid() > 0) {
+            if (!userService.isInBLAny(user_to.getUid(), user_from.getUid())) {
+                if (pmQueriesService.createPM(user_from.getUid(), user_to.getUid(), body)) {
+                    jids_to = userService.getJIDsbyUID(user_to.getUid());
+                    ret = 200;
+                } else {
+                    ret = 500;
+                }
+            } else {
+                ret = 403;
+            }
+        } else {
+            ret = 404;
+        }
+
+        if (ret == 200) {
+            Message msg = new Message();
+            msg.setFrom(jid.asBareJid());
+            msg.setTo(Jid.of(Integer.toString(user_to.getUid()), "push.juick.com", null));
+            com.juick.Message jmsg = new com.juick.Message();
+            jmsg.setUser(user_from);
+            jmsg.setTo(user_to);
+            jmsg.setText(body);
+            msg.addExtension(jmsg);
+            router.sendStanza(msg);
+
+            msg.setTo(Jid.of(Integer.toString(user_to.getUid()), "ws.juick.com", null));
+            router.sendStanza(msg);
+
+            for (String userJid : jids_to) {
+                Message mm = new Message();
+                mm.setTo(Jid.of(userJid));
+                mm.setType(Message.Type.CHAT);
+                haveInRoster = pmQueriesService.havePMinRoster(user_from.getUid(), userJid);
+                if (haveInRoster) {
+                    mm.setFrom(Jid.of(user_from.getName(), "juick.com", "Juick"));
+                    mm.setBody(body);
+                } else {
+                    mm.setFrom(jid);
+                    mm.setBody("Private message from @" + user_from.getName() + ":\n" + body);
+                }
+                xmpp.sendOut(ClientMessage.from(mm));
+            }
+        }
+
+        if (ret == 200) {
+            return "Private message sent";
+        } else {
+            return "Error " + ret;
+        }
+    }
+    @UserCommand(pattern = "^bl$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "BL - Show your blacklist")
+    public String commandBLShow(User user_from, Jid from, String... arguments) {
+        List<User> blusers = userService.getUserBLUsers(user_from.getUid());
+        List<String> bltags = tagService.getUserBLTags(user_from.getUid());
+
+        String txt = StringUtils.EMPTY;
+        if (bltags.size() > 0) {
+            for (String bltag : bltags) {
+                txt += "*" + bltag + "\n";
+            }
+
+            if (blusers.size() > 0) {
+                txt += "\n";
+            }
+        }
+        if (blusers.size() > 0) {
+            for (User bluser : blusers) {
+                txt += "@" + bluser.getName() + "\n";
+            }
+        }
+        if (txt.isEmpty()) {
+            txt = "You don't have any users or tags in your blacklist.";
+        }
+
+        return txt;
+    }
+
+    @UserCommand(pattern = "^#\\+$", help = "#+ - Show last Juick messages")
+    public String commandLast(User user_from, Jid from, String... arguments) {
+        return "Last messages:\n"
+                + printMessages(messagesService.getAll(user_from.getUid(), 0), true);
+    }
+
+    @UserCommand(pattern = "@", help = "@ - Show recommendations and popular personal blogs")
+    public String commandUsers(User user_from, Jid from, String... arguments) {
+        StringBuilder msg = new StringBuilder();
+        msg.append("Recommended blogs");
+        List<String> recommendedUsers = showQueriesService.getRecommendedUsers(user_from);
+        if (recommendedUsers.size() > 0) {
+            for (String user : recommendedUsers) {
+                msg.append("\n@").append(user);
+            }
+        } else {
+            msg.append("\nNo recommendations now. Subscribe to more blogs. ;)");
+        }
+        msg.append("\n\nTop 10 personal blogs:");
+        List<String> topUsers = showQueriesService.getTopUsers();
+        if (topUsers.size() > 0) {
+            for (String user : topUsers) {
+                msg.append("\n@").append(user);
+            }
+        } else {
+            msg.append("\nNo top users. Empty DB? ;)");
+        }
+        return msg.toString();
+    }
+    @UserCommand(pattern = "^bl\\s+@([^\\s\\n\\+]+)", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "BL @username - add @username to your blacklist")
+    public String blacklistUser(User user_from, Jid from, String... arguments) {
+        User blUser = userService.getUserByName(arguments[0]);
+        if (blUser != null) {
+            PrivacyQueriesService.PrivacyResult result = privacyQueriesService.blacklistUser(user_from, blUser);
+            if (result == PrivacyQueriesService.PrivacyResult.Added) {
+                return "User added to your blacklist";
+            } else {
+                return "User removed from your blacklist";
+            }
+        }
+        return "User not found";
+    }
+    @UserCommand(pattern = "^bl\\s\\*(\\S+)$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "BL *tag - add *tag to your blacklist")
+    public String blacklistTag(User user_from, Jid from, String... arguments) {
+        User blUser = userService.getUserByName(arguments[0]);
+        if (blUser != null) {
+            Tag tag = tagService.getTag(arguments[0], false);
+            if (tag != null) {
+                PrivacyQueriesService.PrivacyResult result = privacyQueriesService.blacklistTag(user_from, tag);
+                if (result == PrivacyQueriesService.PrivacyResult.Added) {
+                    return "Tag added to your blacklist";
+                } else {
+                    return "Tag removed from your blacklist";
+                }
+            }
+        }
+        return "Tag not found";
+    }
+    @UserCommand(pattern = "\\*", help = "* - Show your tags")
+    public String commandTags(User currentUser, Jid from, String... args) {
+        List<TagStats> tags = tagService.getUserTagStats(currentUser.getUid());
+        String msg = "Your tags: (tag - messages)\n" +
+                tags.stream()
+                        .map(t -> String.format("\n*%s - %d", t.getTag().getName(), t.getUsageCount())).collect(Collectors.joining());
+        return msg;
+    }
+    @UserCommand(pattern = "S", help = "S - Show your subscriptions")
+    public String commandSubscriptions(User currentUser, Jid from, String... args) {
+        List<User> friends = userService.getUserFriends(currentUser.getUid());
+        List<String> tags = subscriptionService.getSubscribedTags(currentUser);
+        String msg = friends.size() > 0 ? "You are subscribed to users:" + friends.stream().map(u -> "\n@" + u.getName())
+                .collect(Collectors.joining())
+                : "You are not subscribed to any user.";
+        msg += tags.size() > 0 ? "\nYou are subscribed to tags:" + tags.stream().map(t -> "\n*" + t)
+                .collect(Collectors.joining())
+                : "\nYou are not subscribed to any tag.";
+        return msg;
+    }
+    @UserCommand(pattern = "!", help = "! - Show your favorite messages")
+    public String commandFavorites(User currentUser, Jid from, String... args) {
+        List<Integer> mids = messagesService.getUserRecommendations(currentUser.getUid(), 0);
+        if (mids.size() > 0) {
+            return "Favorite messages: \n" + printMessages(mids, false);
+        }
+        return "No favorite messages, try to \"like\" something ;)";
+    }
+    // TODO: target notification
+    @UserCommand(pattern = "^(s|u)\\s+\\@(\\S+)$", help = "S @username - subscribe to user" +
+            "\nU @username - unsubscribe from user", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandSubscribeUser(User user, Jid from, String... args) {
+        boolean subscribe = args[0].equalsIgnoreCase("s");
+        User toUser = userService.getUserByName(args[1]);
+        if (subscribe) {
+            if (subscriptionService.subscribeUser(user, toUser)) {
+                return "Subscribed to @" + toUser.getName();
+            }
+        } else {
+            if (subscriptionService.unSubscribeUser(user, toUser)) {
+                return "Unsubscribed from @" + toUser.getName();
+            }
+            return "You was not subscribed to @" + toUser.getName();
+        }
+        return "Error";
+    }
+    @UserCommand(pattern = "^(s|u)\\s+\\*(\\S+)$", help = "S *tag - subscribe to tag" +
+            "\nU *tag - unsubscribe from tag", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandSubscribeTag(User user, Jid from, String... args) {
+        boolean subscribe = args[0].equalsIgnoreCase("s");
+        Tag tag = tagService.getTag(args[1], true);
+        if (subscribe) {
+            if (subscriptionService.subscribeTag(user, tag)) {
+                return "Subscribed";
+            }
+        } else {
+            if (subscriptionService.unSubscribeTag(user, tag)) {
+                return "Unsubscribed from " + tag.getName();
+            }
+            return "You was not subscribed to " + tag.getName();
+        }
+        return "Error";
+    }
+    @UserCommand(pattern = "^(s|u)\\s+#(\\d+)$", help = "S #1234 - subscribe to comments" +
+            "\nU #1234 - unsubscribe from comments", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandSubscribeMessage(User user, Jid from, String... args) {
+        boolean subscribe = args[0].equalsIgnoreCase("s");
+        int mid = NumberUtils.toInt(args[1], 0);
+        if (messagesService.getMessage(mid) != null) {
+            if (subscribe) {
+                if (subscriptionService.subscribeMessage(mid, user.getUid())) {
+                    return "Subscribed";
+                }
+            } else {
+                if (subscriptionService.unSubscribeMessage(mid, user.getUid())) {
+                    return "Unsubscribed from #" + mid;
+                }
+                return "You was not subscribed to #" + mid;
+            }
+        }
+        return "Error";
+    }
+    @UserCommand(pattern = "^(on|off)$", patternFlags = Pattern.CASE_INSENSITIVE,
+            help = "ON/OFF - Enable/disable subscriptions delivery")
+    public String commandOnOff(User user, Jid from, String[] input) {
+        UserService.ActiveStatus newStatus;
+        String retValUpdated;
+        if (input[0].toLowerCase().equals("on")) {
+            newStatus = UserService.ActiveStatus.Active;
+            retValUpdated = "Notifications are activated for " + from.asBareJid().toEscapedString();
+        } else {
+            newStatus = UserService.ActiveStatus.Inactive;
+            retValUpdated = "Notifications are disabled for " + from.asBareJid().toEscapedString();
+        }
+
+        if (userService.setActiveStatusForJID(from.asBareJid().toEscapedString(), newStatus)) {
+            return retValUpdated;
+        } else {
+            return String.format("Subscriptions status for %s was not changed", from.toEscapedString());
+        }
+    }
+    @UserCommand(pattern = "^\\@([^\\s\\n\\+]+)(\\+?)$",
+            help = "@username+ - Show user's info and last 20 messages")
+    public String commandUser(User user, Jid from, String... arguments) {
+        User blogUser = userService.getUserByName(arguments[0]);
+        int page = arguments[1].length();
+        if (blogUser.getUid() > 0) {
+            List<Integer> mids = messagesService.getUserBlog(blogUser.getUid(), 0, 0);
+            return String.format("Last messages from @%s:\n%s", arguments[0],
+                    printMessages(mids, false));
+        }
+        return "User not found";
+    }
+    @UserCommand(pattern = "^#(\\d+)(\\+?)$", help = "#1234 - Show message (#1234+ - message with replies)")
+    public String commandShow(User user, Jid from, String... arguments) {
+        boolean showReplies = arguments[1].length() > 0;
+        int mid = NumberUtils.toInt(arguments[0], 0);
+        if (mid == 0) {
+            return "Error";
+        }
+        com.juick.Message msg = messagesService.getMessage(mid);
+        if (msg != null) {
+            if (showReplies) {
+                List<com.juick.Message> replies = messagesService.getReplies(mid);
+                replies.add(0, msg);
+                return String.join("\n",
+                        replies.stream().map(PlainTextFormatter::formatPostSummary).collect(Collectors.toList()));
+            }
+            return PlainTextFormatter.formatPostSummary(msg);
+        }
+        return "Message not found";
+    }
+    @UserCommand(pattern = "^D #(\\d+)$", help = "D #1234 - Delete post", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandDeletePost(User user, Jid from, String... args) {
+        int mid = Integer.valueOf(args[0]);
+        if (messagesService.deleteMessage(user.getUid(), mid)) {
+            return "Message deleted";
+        }
+        return "This is not your message";
+    }
+    @UserCommand(pattern = "^D #(\\d+)(\\.|\\-|\\/)(\\d+)$", help = "D #1234/5 - Delete comment", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandDeleteReply(User user, Jid from, String... args) {
+        int mid = Integer.valueOf(args[0]);
+        int rid = Integer.valueOf(args[2]);
+        if (messagesService.deleteReply(user.getUid(), mid, rid)) {
+            return "Reply deleted";
+        } else {
+            return "This is not your reply";
+        }
+    }
+    /*
+    @UserCommand(pattern = "(^(D L|DL|D LAST)$", help = "D #1234/5 - Delete comment", patternFlags = Pattern.CASE_INSENSITIVE)
+    public String commandDeleteLast(User user, Jid from, String... args) {
+
+    }
+    */
+    void sendReply(Jid jidTo, String txt) {
+        Message reply = new Message();
+        reply.setFrom(jid);
+        reply.setTo(jidTo);
+        reply.setType(Message.Type.CHAT);
+        reply.setBody(txt);
+        xmpp.sendOut(ClientMessage.from(reply));
+    }
+
+    void sendNotification(Stanza stanza) {
+        xmpp.sendOut(stanza);
+    }
+
+    @Override
+    public void stanzaReceived(Stanza xmlValue) {
+        if (xmlValue instanceof Presence) {
+            Presence p = (Presence) xmlValue;
+            if (p.getType() == null || !p.getType().equals(Presence.Type.ERROR)) {
+                incomingPresence(p);
+            }
+        } else if (xmlValue instanceof Message) {
+            Message msg = (Message) xmlValue;
+            if (!incomingMessage(msg)) {
+                router.sendStanza(msg);
+            }
+        } else if (xmlValue instanceof IQ) {
+            IQ iq = (IQ) xmlValue;
+            router.sendStanza(iq);
+        }
+    }
+
+    String printMessages(List<Integer> mids, boolean crop) {
+        return messagesService.getMessages(mids).stream()
+                .sorted(Collections.reverseOrder())
+                .map(PlainTextFormatter::formatPostSummary).collect(Collectors.joining("\n\n"));
+    }
+
+    void broadcastPresence(Presence.Type type) {
+        Presence presence = new Presence();
+        presence.setFrom(jid);
+        if (type != null) {
+            presence.setType(type);
+        }
+        userService.getActiveJIDs().forEach(j -> {
+            try {
+                presence.setTo(Jid.of(j));
+                xmpp.sendOut(ClientPresence.from(presence));
+            } catch (IllegalArgumentException ex) {
+                logger.warn("Invalid jid: {}", j, ex);
+            }
+        });
+    }
+
+    @Override
+    public void close() throws Exception {
+        broadcastPresence(Presence.Type.UNAVAILABLE);
+    }
+}