Add support for reactions

libdino/CMakeLists.txt

@@ -51,6 +51,7 @@ SOURCES
     src/service/muc_manager.vala
     src/service/notification_events.vala
     src/service/presence_manager.vala
+    src/service/reactions.vala
     src/service/registration.vala
     src/service/roster_manager.vala
     src/service/search_processor.vala

libdino/src/application.vala

@@ -55,6 +55,7 @@ public interface Application : GLib.Application {
         EntityInfo.start(stream_interactor, db);
         MessageCorrection.start(stream_interactor, db);
         FileTransferStorage.start(stream_interactor, db);
+        Reactions.start(stream_interactor, db);
 
         create_actions();
 

libdino/src/plugin/interfaces.vala

@@ -154,7 +154,8 @@ public interface ConversationItemWidgetInterface: Object {
 public delegate void MessageActionEvoked(Object button, Plugins.MetaConversationItem evoked_on, Object widget);
 public class MessageAction : Object {
     public string icon_name;
-    public MessageActionEvoked callback;
+    public Object? popover;
+    public MessageActionEvoked? callback;
 }
 
 public abstract class MetaConversationNotification : Object {

libdino/src/service/database.vala

@@ -119,6 +119,20 @@ public class Database : Qlite.Database {
         }
     }
 
+    public class OccupantIdTable : Table {
+        public Column<int> id = new Column.Integer("id") { primary_key = true };
+        public Column<int> account_id = new Column.Integer("account_id") { not_null = true };
+        public Column<string> last_nick = new Column.Text("last_nick");
+        public Column<int> jid_id = new Column.Integer("jid_id");
+        public Column<string> occupant_id = new Column.Text("occupant_id");
+
+        internal OccupantIdTable(Database db) {
+            base(db, "occupant_id");
+            init({id, account_id, last_nick, jid_id, occupant_id});
+            unique({account_id, jid_id, occupant_id}, "REPLACE");
+        }
+    }
+
     public class UndecryptedTable : Table {
         public Column<int> message_id = new Column.Integer("message_id");
         public Column<int> type_ = new Column.Integer("type");
@@ -277,6 +291,23 @@ public class Database : Qlite.Database {
         }
     }
 
+    public class ReactionTable : Table {
+        public Column<int> id = new Column.Integer("id") { primary_key = true, auto_increment = true };
+        public Column<int> account_id = new Column.Integer("account_id") { not_null = true };
+        public Column<int> occupant_id = new Column.Integer("occupant_id");
+        public Column<int> content_item_id = new Column.Integer("content_item_id") { not_null = true };
+        public Column<long> time = new Column.Long("time") { not_null = true };
+        public Column<int> jid_id = new Column.Integer("jid_id");
+        public Column<string> emojis = new Column.Text("emojis");
+
+        internal ReactionTable(Database db) {
+            base(db, "reaction");
+            init({id, account_id, occupant_id, content_item_id, time, jid_id, emojis});
+            unique({account_id, content_item_id, jid_id}, "REPLACE");
+            unique({account_id, content_item_id, occupant_id}, "REPLACE");
+        }
+    }
+
     public class SettingsTable : Table {
         public Column<int> id = new Column.Integer("id") { primary_key = true, auto_increment = true };
         public Column<string> key = new Column.Text("key") { unique = true, not_null = true };
@@ -308,6 +339,7 @@ public class Database : Qlite.Database {
     public MessageTable message { get; private set; }
     public MessageCorrectionTable message_correction { get; private set; }
     public RealJidTable real_jid { get; private set; }
+    public OccupantIdTable occupantid { get; private set; }
     public FileTransferTable file_transfer { get; private set; }
     public CallTable call { get; private set; }
     public CallCounterpartTable call_counterpart { get; private set; }
@@ -317,6 +349,7 @@ public class Database : Qlite.Database {
     public EntityFeatureTable entity_feature { get; private set; }
     public RosterTable roster { get; private set; }
     public MamCatchupTable mam_catchup { get; private set; }
+    public ReactionTable reaction { get; private set; }
     public SettingsTable settings { get; private set; }
     public ConversationSettingsTable conversation_settings { get; private set; }
 
@@ -332,6 +365,7 @@ public class Database : Qlite.Database {
         content_item = new ContentItemTable(this);
         message = new MessageTable(this);
         message_correction = new MessageCorrectionTable(this);
+        occupantid = new OccupantIdTable(this);
         real_jid = new RealJidTable(this);
         file_transfer = new FileTransferTable(this);
         call = new CallTable(this);
@@ -342,9 +376,10 @@ public class Database : Qlite.Database {
         entity_feature = new EntityFeatureTable(this);
         roster = new RosterTable(this);
         mam_catchup = new MamCatchupTable(this);
+        reaction = new ReactionTable(this);
         settings = new SettingsTable(this);
         conversation_settings = new ConversationSettingsTable(this);
-        init({ account, jid, entity, content_item, message, message_correction, real_jid, file_transfer, call, call_counterpart, conversation, avatar, entity_identity, entity_feature, roster, mam_catchup, settings, conversation_settings });
+        init({ account, jid, entity, content_item, message, message_correction, real_jid, occupantid, file_transfer, call, call_counterpart, conversation, avatar, entity_identity, entity_feature, roster, mam_catchup, reaction, settings, conversation_settings });
 
         try {
             exec("PRAGMA journal_mode = WAL");

libdino/src/service/module_manager.vala

@@ -70,6 +70,7 @@ public class ModuleManager {
             module_map[account].add(new StreamError.Module());
             module_map[account].add(new Xep.InBandRegistration.Module());
             module_map[account].add(new Xep.HttpFileUpload.Module());
+            module_map[account].add(new Xep.Reactions.Module());
             module_map[account].add(new Xep.Socks5Bytestreams.Module());
             module_map[account].add(new Xep.InBandBytestreams.Module());
             module_map[account].add(new Xep.Jingle.Module());
@@ -80,6 +81,7 @@ public class ModuleManager {
             module_map[account].add(new Xep.LastMessageCorrection.Module());
             module_map[account].add(new Xep.DirectMucInvitations.Module());
             module_map[account].add(new Xep.JingleMessageInitiation.Module());
+            module_map[account].add(new Xep.OccupantIds.Module());
             module_map[account].add(new Xep.JingleRawUdp.Module());
             module_map[account].add(new Xep.Muji.Module());
             module_map[account].add(new Xep.CallInvites.Module());

libdino/src/service/muc_manager.vala

@@ -28,6 +28,7 @@ public class MucManager : StreamInteractionModule, Object {
     private HashMap<Account, BookmarksProvider> bookmarks_provider = new HashMap<Account, BookmarksProvider>(Account.hash_func, Account.equals_func);
     private HashMap<Account, Gee.List<Jid>> invites = new HashMap<Account, Gee.List<Jid>>(Account.hash_func, Account.equals_func);
     public HashMap<Account, Jid> default_muc_server = new HashMap<Account, Jid>(Account.hash_func, Account.equals_func);
+    private HashMap<Account, HashMap<Jid, string>> own_occupant_ids = new HashMap<Account, HashMap<Jid, string>>(Account.hash_func, Account.equals_func);
 
     public static void start(StreamInteractor stream_interactor) {
         MucManager m = new MucManager(stream_interactor);
@@ -386,6 +387,13 @@ public class MucManager : StreamInteractionModule, Object {
         return get_own_jid(jid, account) != null;
     }
 
+    public string? get_own_occupant_id(Account account, Jid muc_jid) {
+        if (account in own_occupant_ids && muc_jid in own_occupant_ids[account]) {
+            return own_occupant_ids[account][muc_jid];
+        }
+        return null;
+    }
+
     private void on_account_added(Account account) {
         stream_interactor.module_manager.get_module(account, Xep.Muc.Module.IDENTITY).self_removed_from_room.connect( (stream, jid, code) => {
             left(account, jid);
@@ -413,6 +421,12 @@ public class MucManager : StreamInteractionModule, Object {
                 private_room_occupant_updated(account, room, occupant);
             }
         });
+        stream_interactor.module_manager.get_module(account, Xep.OccupantIds.Module.IDENTITY).received_own_occupant_id.connect( (stream, jid, occupant_id) => {
+            if (!(account in own_occupant_ids)) {
+                own_occupant_ids[account] = new HashMap<Jid, string>(Jid.hash_bare_func, Jid.equals_bare_func);
+            }
+            own_occupant_ids[account][jid] = occupant_id;
+        });
     }
 
     private async void search_default_muc_server(Account account) {
@@ -655,6 +669,7 @@ public class MucManager : StreamInteractionModule, Object {
                 if (m != null) {
                     // For own messages from this device (msg is a duplicate)
                     m.marked = Message.Marked.RECEIVED;
+                    m.server_id = Xep.UniqueStableStanzaIDs.get_stanza_id(stanza, m.counterpart.bare_jid);
                 }
                 // For own messages from other devices (msg is not a duplicate msg)
                 message.marked = Message.Marked.RECEIVED;

libdino/src/service/reactions.vala

@@ -0,0 +1,488 @@
+using Gee;
+using Qlite;
+
+using Xmpp;
+using Xmpp.Xep;
+using Dino.Entities;
+
+public class Dino.Reactions : StreamInteractionModule, Object {
+    public static ModuleIdentity<Reactions> IDENTITY = new ModuleIdentity<Reactions>("reactions");
+    public string id { get { return IDENTITY.id; } }
+
+    public signal void reaction_added(Account account, int content_item_id, Jid jid, string reaction);
+//    [Signal(detailed=true)]
+    public signal void reaction_removed(Account account, int content_item_id, Jid jid, string reaction);
+
+    private StreamInteractor stream_interactor;
+    private Database db;
+    private HashMap<string, Gee.List<ReactionInfo>> reaction_infos = new HashMap<string, Gee.List<ReactionInfo>>();
+
+    public static void start(StreamInteractor stream_interactor, Database database) {
+        Reactions m = new Reactions(stream_interactor, database);
+        stream_interactor.add_module(m);
+    }
+
+    private Reactions(StreamInteractor stream_interactor, Database database) {
+        this.stream_interactor = stream_interactor;
+        this.db = database;
+        stream_interactor.account_added.connect(on_account_added);
+
+        stream_interactor.get_module(MessageProcessor.IDENTITY).message_sent_or_received.connect(on_new_message);
+    }
+
+    public void add_reaction(Conversation conversation, ContentItem content_item, string reaction) {
+        Gee.List<string> reactions = get_own_reactions(conversation, content_item);
+        if (!reactions.contains(reaction)) {
+            reactions.add(reaction);
+        }
+        send_reactions(conversation, content_item, reactions);
+        reaction_added(conversation.account, content_item.id, conversation.account.bare_jid, reaction);
+    }
+
+    public void remove_reaction(Conversation conversation, ContentItem content_item, string reaction) {
+        Gee.List<string> reactions = get_own_reactions(conversation, content_item);
+        reactions.remove(reaction);
+        send_reactions(conversation, content_item, reactions);
+        reaction_removed(conversation.account, content_item.id, conversation.account.bare_jid, reaction);
+    }
+
+    public Gee.List<ReactionUsers> get_item_reactions(Conversation conversation, ContentItem content_item) {
+        if (conversation.type_ == Conversation.Type.CHAT) {
+            return get_chat_message_reactions(conversation.account, content_item);
+        } else {
+            return get_muc_message_reactions(conversation.account, content_item);
+        }
+    }
+
+    public async bool conversation_supports_reactions(Conversation conversation) {
+        if (conversation.type_ == Conversation.Type.CHAT) {
+            Gee.List<Jid>? resources = stream_interactor.get_module(PresenceManager.IDENTITY).get_full_jids(conversation.counterpart, conversation.account);
+            if (resources == null) return false;
+
+            foreach (Jid full_jid in resources) {
+                bool? has_feature = yield stream_interactor.get_module(EntityInfo.IDENTITY).has_feature(conversation.account, full_jid, Xep.Reactions.NS_URI);
+                if (has_feature == true) {
+                    return true;
+                }
+            }
+        } else {
+            // The MUC server needs to 1) support stable stanza ids 2) either support occupant ids or be a private room (where we know real jids)
+            var entity_info = stream_interactor.get_module(EntityInfo.IDENTITY);
+            bool server_supports_sid = (yield entity_info.has_feature(conversation.account, conversation.counterpart.bare_jid, Xep.UniqueStableStanzaIDs.NS_URI)) ||
+                    (yield entity_info.has_feature(conversation.account, conversation.counterpart.bare_jid, Xmpp.MessageArchiveManagement.NS_URI_2));
+            if (!server_supports_sid) return false;
+
+            bool? supports_occupant_ids = yield entity_info.has_feature(conversation.account, conversation.counterpart, Xep.OccupantIds.NS_URI);
+            if (supports_occupant_ids) return true;
+
+            return stream_interactor.get_module(MucManager.IDENTITY).is_private_room(conversation.account, conversation.counterpart);
+        }
+        return false;
+    }
+
+    private void send_reactions(Conversation conversation, ContentItem content_item, Gee.List<string> reactions) {
+        Message? message = null;
+
+        FileItem? file_item = content_item as FileItem;
+        if (file_item != null) {
+            int message_id = int.parse(file_item.file_transfer.info);
+            message = stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_id(message_id, conversation);
+        }
+        MessageItem? message_item = content_item as MessageItem;
+        if (message_item != null) {
+            message = message_item.message;
+        }
+
+        if (message == null) {
+            return;
+        }
+
+        XmppStream stream = stream_interactor.get_stream(conversation.account);
+        if (conversation.type_ == Conversation.Type.GROUPCHAT || conversation.type_ == Conversation.Type.GROUPCHAT_PM) {
+            if (conversation.type_ == Conversation.Type.GROUPCHAT) {
+                stream.get_module(Xmpp.Xep.Reactions.Module.IDENTITY).send_reaction(stream, conversation.counterpart, "groupchat", message.server_id ?? message.stanza_id, reactions);
+            } else if (conversation.type_ == Conversation.Type.GROUPCHAT_PM) {
+                stream.get_module(Xmpp.Xep.Reactions.Module.IDENTITY).send_reaction(stream, conversation.counterpart, "chat", message.server_id ?? message.stanza_id, reactions);
+            }
+            // We save the reaction when it gets reflected back to us
+        } else if (conversation.type_ == Conversation.Type.CHAT) {
+            stream.get_module(Xmpp.Xep.Reactions.Module.IDENTITY).send_reaction(stream, conversation.counterpart, "chat", message.stanza_id, reactions);
+            var datetime_now = new DateTime.now();
+            long now_long = (long) (datetime_now.to_unix() * 1000 + datetime_now.get_microsecond());
+            save_chat_reactions(conversation.account, conversation.account.bare_jid, content_item.id, now_long, reactions);
+        }
+    }
+
+    private Gee.List<string> get_own_reactions(Conversation conversation, ContentItem content_item) {
+        if (conversation.type_ == Conversation.Type.CHAT) {
+            return get_chat_user_reactions(conversation.account, content_item.id, conversation.account.bare_jid)
+                    .emojis;
+        } else if (conversation.type_ == Conversation.Type.GROUPCHAT) {
+            string own_occupant_id = stream_interactor.get_module(MucManager.IDENTITY).get_own_occupant_id(conversation.account, content_item.jid);
+            return get_muc_user_reactions(conversation.account, content_item.id, own_occupant_id, conversation.account.bare_jid)
+                    .emojis;
+        }
+        return new ArrayList<string>();
+    }
+
+    private class ReactionsTime {
+        public Gee.List<string>? emojis = null;
+        public long time = -1;
+    }
+
+    private ReactionsTime get_chat_user_reactions(Account account, int content_item_id, Jid jid) {
+        int jid_id = db.get_jid_id(jid);
+
+        QueryBuilder query = db.reaction.select()
+            .with(db.reaction.account_id, "=", account.id)
+            .with(db.reaction.content_item_id, "=", content_item_id)
+            .with(db.reaction.jid_id, "=", jid_id);
+
+        RowOption row = query.single().row();
+        ReactionsTime ret = new ReactionsTime();
+        if (row.is_present()) {
+            ret.emojis = string_to_emoji_list(row[db.reaction.emojis]);
+            ret.time = row[db.reaction.time];
+        } else {
+            ret.emojis = new ArrayList<string>();
+            ret.time = -1;
+        }
+        return ret;
+    }
+
+    private ReactionsTime get_muc_user_reactions(Account account, int content_item_id, string? occupantid, Jid? real_jid) {
+        QueryBuilder query = db.reaction.select()
+                .with(db.reaction.account_id, "=", account.id)
+                .with(db.reaction.content_item_id, "=", content_item_id)
+                .join_with(db.occupantid, db.occupantid.id, db.reaction.occupant_id)
+                .with(db.occupantid.occupant_id, "=", occupantid);
+
+        RowOption row = query.single().row();
+        ReactionsTime ret = new ReactionsTime();
+        if (row.is_present()) {
+            ret.emojis = string_to_emoji_list(row[db.reaction.emojis]);
+            ret.time = row[db.reaction.time];
+        } else {
+            ret.emojis = new ArrayList<string>();
+            ret.time = -1;
+        }
+        return ret;
+    }
+
+    private Gee.List<string> string_to_emoji_list(string emoji_str) {
+        ArrayList<string> ret = new ArrayList<string>();
+        foreach (string emoji in emoji_str.split(",")) {
+            if (emoji.length != 0)
+            ret.add(emoji);
+        }
+        return ret;
+    }
+
+    public Gee.List<ReactionUsers> get_chat_message_reactions(Account account, ContentItem content_item) {
+        QueryBuilder select = db.reaction.select()
+                .with(db.reaction.account_id, "=", account.id)
+                .with(db.reaction.content_item_id, "=", content_item.id)
+                .order_by(db.reaction.time, "DESC");
+
+        var ret = new ArrayList<ReactionUsers>();
+        var index = new HashMap<string, ReactionUsers>();
+        foreach (Row row in select) {
+            string emoji_str = row[db.reaction.emojis];
+            Jid jid = db.get_jid_by_id(row[db.reaction.jid_id]);
+
+            foreach (string emoji in emoji_str.split(",")) {
+                if (!index.has_key(emoji)) {
+                    index[emoji] = new ReactionUsers() { reaction=emoji, jids=new ArrayList<Jid>(Jid.equals_func) };
+                    ret.add(index[emoji]);
+                }
+                index[emoji].jids.add(jid);
+            }
+        }
+        return ret;
+    }
+
+    public Gee.List<ReactionUsers> get_muc_message_reactions(Account account, ContentItem content_item) {
+        QueryBuilder select = db.reaction.select()
+                .with(db.reaction.account_id, "=", account.id)
+                .with(db.reaction.content_item_id, "=", content_item.id)
+                .join_with(db.occupantid, db.occupantid.id, db.reaction.occupant_id)
+                .order_by(db.reaction.time, "DESC");
+
+        string? own_occupant_id = stream_interactor.get_module(MucManager.IDENTITY).get_own_occupant_id(account, content_item.jid);
+
+        var ret = new ArrayList<ReactionUsers>();
+        var index = new HashMap<string, ReactionUsers>();
+        foreach (Row row in select) {
+            string emoji_str = row[db.reaction.emojis];
+
+            Jid jid = null;
+            if (row[db.occupantid.occupant_id] == own_occupant_id) {
+                jid = account.bare_jid;
+            } else {
+                string nick = row[db.occupantid.last_nick];
+                jid = content_item.jid.with_resource(nick);
+            }
+
+            foreach (string emoji in emoji_str.split(",")) {
+                if (!index.has_key(emoji)) {
+                    index[emoji] = new ReactionUsers() { reaction=emoji, jids=new ArrayList<Jid>(Jid.equals_func) };
+                    ret.add(index[emoji]);
+                }
+                index[emoji].jids.add(jid);
+            }
+        }
+        return ret;
+    }
+
+    private void on_account_added(Account account) {
+        // TODO get time from delays
+        stream_interactor.module_manager.get_module(account, Xmpp.Xep.Reactions.Module.IDENTITY).received_reactions.connect((stream, from_jid, message_id, reactions, stanza) => {
+            on_reaction_received.begin(account, from_jid, message_id, reactions, stanza);
+        });
+    }
+
+    private async void on_reaction_received(Account account, Jid from_jid, string message_id, Gee.List<string> reactions, MessageStanza stanza) {
+        if (stanza.type_ == MessageStanza.TYPE_GROUPCHAT) {
+            // Apply the same restrictions for incoming reactions as we do on sending them
+            Conversation muc_conversation = stream_interactor.get_module(ConversationManager.IDENTITY).approx_conversation_for_stanza(from_jid, account.bare_jid, account, MessageStanza.TYPE_GROUPCHAT);
+            bool muc_supports_reactions = yield conversation_supports_reactions(muc_conversation);
+            if (!muc_supports_reactions) return;
+        }
+
+        Message reaction_message = yield stream_interactor.get_module(MessageProcessor.IDENTITY).parse_message_stanza(account, stanza);
+        Conversation conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation_for_message(reaction_message);
+
+        Message? message = get_message_for_reaction(conversation, message_id);
+        var reaction_info = new ReactionInfo() { account=account, from_jid=from_jid, reactions=reactions, stanza=stanza, received_time=new DateTime.now() };
+
+        if (message != null) {
+            process_reaction_for_message(message.id, reaction_info);
+            return;
+        }
+
+        // Store reaction infos for later processing after we got the message
+        print(@"Got reaction for $message_id but dont have message yet $(db.get_jid_id(stanza.from.bare_jid))\n");
+        if (!reaction_infos.has_key(message_id)) {
+            reaction_infos[message_id] = new ArrayList<ReactionInfo>();
+        }
+        reaction_infos[message_id].add(reaction_info);
+    }
+
+    private void on_new_message(Message message, Conversation conversation) {
+        Gee.List<ReactionInfo>? reaction_info_list = null;
+        if (conversation.type_ == Conversation.Type.CHAT) {
+            reaction_info_list = reaction_infos[message.stanza_id];
+        } else {
+            reaction_info_list = reaction_infos[message.server_id];
+        }
+        if (reaction_info_list == null) return;
+
+        // Check if the (or potentially which) reaction fits the message
+        ReactionInfo? reaction_info = null;
+        foreach (ReactionInfo info in reaction_info_list) {
+            if (!info.account.equals(conversation.account)) return;
+            switch (info.stanza.type_) {
+                case MessageStanza.TYPE_CHAT:
+                    Jid counterpart = message.from.equals_bare(conversation.account.bare_jid) ? info.stanza.from: info.stanza.to;
+                    if (message.type_ != Message.Type.CHAT || !counterpart.equals_bare(conversation.counterpart)) continue;
+                    break;
+                case MessageStanza.TYPE_GROUPCHAT:
+                    if (message.type_ != Message.Type.GROUPCHAT || !message.from.equals_bare(conversation.counterpart)) continue;
+                    break;
+                default:
+                    break;
+            }
+
+            reaction_info = info;
+        }
+        if (reaction_info == null) return;
+        reaction_info_list.remove(reaction_info);
+        if (reaction_info_list.is_empty) reaction_infos.unset(message.stanza_id);
+
+        print(@"Got message for reaction\n");
+        process_reaction_for_message(message.id, reaction_info);
+    }
+
+    private Message? get_message_for_reaction(Conversation conversation, string message_id) {
+        // Query message from a specific account and counterpart. This also makes sure it's a valid reaction for the message.
+        if (conversation.type_ == Conversation.Type.CHAT) {
+            return stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_stanza_id(message_id, conversation);
+        } else {
+            return stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_server_id(message_id, conversation);
+        }
+    }
+
+    private void process_reaction_for_message(int message_db_id, ReactionInfo reaction_info) {
+        Account account = reaction_info.account;
+        MessageStanza stanza = reaction_info.stanza;
+        Jid from_jid = reaction_info.from_jid;
+        Gee.List<string> reactions = reaction_info.reactions;
+
+        RowOption file_transfer_row = db.file_transfer.select()
+                .with(db.file_transfer.account_id, "=", account.id)
+                .with(db.file_transfer.info, "=", message_db_id.to_string())
+                .single().row(); // TODO better
+
+        var content_item_row = db.content_item.select();
+
+        if (file_transfer_row.is_present()) {
+            content_item_row.with(db.content_item.foreign_id, "=", file_transfer_row[db.file_transfer.id])
+                    .with(db.content_item.content_type, "=", 2);
+        } else {
+            content_item_row.with(db.content_item.foreign_id, "=", message_db_id)
+                    .with(db.content_item.content_type, "=", 1);
+        }
+        var content_item_row_opt = content_item_row.single().row();
+        if (!content_item_row_opt.is_present()) return;
+        int content_item_id = content_item_row_opt[db.content_item.id];
+
+        // Get reaction time
+        DateTime? reaction_time = null;
+        DelayedDelivery.MessageFlag? delayed_message_flag = DelayedDelivery.MessageFlag.get_flag(stanza);
+        if (delayed_message_flag != null) {
+            reaction_time = delayed_message_flag.datetime;
+        }
+        if (reaction_time == null) {
+            MessageArchiveManagement.MessageFlag? mam_message_flag = MessageArchiveManagement.MessageFlag.get_flag(stanza);
+            if (mam_message_flag != null) reaction_time = mam_message_flag.server_time;
+        }
+        var time_now = new DateTime.now_local();
+        if (reaction_time == null) reaction_time = time_now;
+        if (reaction_time.compare(time_now) > 0)  {
+            reaction_time = reaction_info.received_time;
+        }
+        long reaction_time_long = (long) (reaction_time.to_unix() * 1000 + reaction_time.get_microsecond() / 1000);
+
+        // Get current reactions
+        string? occupant_id = OccupantIds.get_occupant_id(stanza.stanza);
+        Jid? real_jid = stream_interactor.get_module(MucManager.IDENTITY).get_real_jid(from_jid, account);
+        if (stanza.type_ == MessageStanza.TYPE_GROUPCHAT && occupant_id == null && real_jid == null) {
+            warning("Attempting to add reaction to message w/o knowing occupant id or real jid");
+            return;
+        }
+
+        ReactionsTime reactions_time = null;
+        if (stanza.type_ == MessageStanza.TYPE_GROUPCHAT) {
+            reactions_time = get_muc_user_reactions(account, content_item_id, occupant_id, real_jid);
+        } else if (stanza.type_ == MessageStanza.TYPE_CHAT) {
+            reactions_time = get_chat_user_reactions(account, content_item_id, from_jid);
+        }
+
+        if (reaction_time_long <= reactions_time.time) {
+            // We already have a more recent reaction
+            return;
+        }
+
+        // Save reactions
+        if (stanza.type_ == MessageStanza.TYPE_CHAT) {
+            save_chat_reactions(account, from_jid, content_item_id, reaction_time_long, reactions);
+        } else if (stanza.type_ == MessageStanza.TYPE_GROUPCHAT) {
+            save_muc_reactions(account, content_item_id, from_jid, occupant_id, real_jid, reaction_time_long, reactions);
+        }
+
+        // Notify about reaction changes
+        Gee.List<string>? current_reactions = reactions_time.emojis;
+
+        Jid signal_jid = from_jid;
+        if (stanza.type_ == MessageStanza.TYPE_GROUPCHAT &&
+                signal_jid.equals(stream_interactor.get_module(MucManager.IDENTITY).get_own_jid(from_jid, account))) {
+            signal_jid = account.bare_jid;
+        }
+
+        foreach (string current_reaction in current_reactions) {
+            if (!reactions.contains(current_reaction)) {
+                reaction_removed(account, content_item_id, signal_jid, current_reaction);
+            }
+        }
+        foreach (string new_reaction in reactions) {
+            if (!current_reactions.contains(new_reaction)) {
+                reaction_added(account, content_item_id, signal_jid, new_reaction);
+            }
+        }
+
+        print("reactions were: ");
+        foreach (string reac in current_reactions) {
+            print(reac + " ");
+        }
+        print("\n");
+        print("reactions new : ");
+        foreach (string reac in reactions) {
+            print(reac + " ");
+        }
+        print("\n");
+    }
+
+    private void save_chat_reactions(Account account, Jid jid, int content_item_id, long reaction_time, Gee.List<string> reactions) {
+        var emoji_builder = new StringBuilder();
+        for (int i = 0; i < reactions.size; i++) {
+            if (i != 0) emoji_builder.append(",");
+            emoji_builder.append(reactions[i]);
+        }
+
+        db.reaction.upsert()
+                .value(db.reaction.account_id, account.id, true)
+                .value(db.reaction.content_item_id, content_item_id, true)
+                .value(db.reaction.jid_id, db.get_jid_id(jid), true)
+                .value(db.reaction.emojis, emoji_builder.str, false)
+                .value(db.reaction.time, reaction_time, false)
+                .perform();
+    }
+
+    private void save_muc_reactions(Account account, int content_item_id, Jid jid, string? occupant_id, Jid? real_jid, long reaction_time, Gee.List<string> reactions) {
+        assert(occupant_id != null || real_jid != null);
+
+        int jid_id = db.get_jid_id(jid);
+
+        var emoji_builder = new StringBuilder();
+        for (int i = 0; i < reactions.size; i++) {
+            if (i != 0) emoji_builder.append(",");
+            emoji_builder.append(reactions[i]);
+        }
+
+        var builder = db.reaction.upsert()
+                .value(db.reaction.account_id, account.id, true)
+                .value(db.reaction.content_item_id, content_item_id, true)
+                .value(db.reaction.emojis, emoji_builder.str, false)
+                .value(db.reaction.time, reaction_time, false);
+
+        if (real_jid != null) {
+            builder.value(db.reaction.jid_id, db.get_jid_id(real_jid), occupant_id == null);
+        }
+
+        if (occupant_id != null) {
+            RowOption row = db.occupantid.select()
+                    .with(db.occupantid.account_id, "=", account.id)
+                    .with(db.occupantid.jid_id, "=", jid_id)
+                    .with(db.occupantid.occupant_id, "=", occupant_id)
+                    .single().row();
+
+            int occupant_db_id = -1;
+            if (row.is_present()) {
+                occupant_db_id = row[db.occupantid.id];
+            } else {
+                occupant_db_id = (int)db.occupantid.upsert()
+                        .value(db.occupantid.account_id, account.id, true)
+                        .value(db.occupantid.jid_id, jid_id, true)
+                        .value(db.occupantid.occupant_id, occupant_id, true)
+                        .value(db.occupantid.last_nick, jid.resourcepart, false)
+                        .perform();
+            }
+            builder.value(db.reaction.occupant_id, occupant_db_id, true);
+        }
+
+        builder.perform();
+    }
+}
+
+public class Dino.ReactionUsers {
+    public string reaction { get; set; }
+    public Gee.List<Jid> jids { get; set; }
+}
+
+public class Dino.ReactionInfo {
+    public Account account { get; set; }
+    public Jid from_jid { get; set; }
+    public Gee.List<string> reactions { get; set; }
+    public MessageStanza stanza { get; set; }
+    public DateTime received_time { get; set; }
+}

main/CMakeLists.txt

@@ -17,6 +17,7 @@ set(RESOURCE_LIST
     dino-conversation-list-placeholder-arrow.svg
 
     icons/scalable/actions/dino-account-plus-symbolic.svg
+    icons/scalable/actions/dino-emoticon-add-symbolic.svg
     icons/scalable/actions/dino-emoticon-symbolic.svg
     icons/scalable/actions/dino-qr-code-symbolic.svg
 
@@ -156,6 +157,7 @@ SOURCES
     src/ui/conversation_content_view/file_image_widget.vala
     src/ui/conversation_content_view/file_widget.vala
     src/ui/conversation_content_view/message_widget.vala
+    src/ui/conversation_content_view/reactions_widget.vala
     src/ui/conversation_content_view/subscription_notification.vala
 
     src/ui/chat_input/chat_input_controller.vala

main/data/conversation_content_view/view.ui

@@ -36,6 +36,9 @@
                                                                 <property name="margin-end">10</property>
                                                                 <property name="halign">end</property>
                                                                 <property name="valign">start</property>
+                                                                <style>
+                                                                    <class name="linked"/>
+                                                                </style>
                                                                 <child>
                                                                     <object class="GtkButton" id="button1">
                                                                         <property name="visible">0</property>

main/data/icons/scalable/actions/dino-emoticon-add-symbolic.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" viewBox="0 0 23.568 23.711" xmlns="http://www.w3.org/2000/svg">
+  <path d="m10 19.211c2.33 0 4.3-1.46 5.11-3.5h-10.22c0.8 2.04 2.78 3.5 5.11 3.5m-3.5-6.5c0.82843 0 1.5-0.67157 1.5-1.5s-0.67157-1.5-1.5-1.5-1.5 0.67157-1.5 1.5 0.67157 1.5 1.5 1.5m7 0c0.82843 0 1.5-0.67157 1.5-1.5s-0.67157-1.5-1.5-1.5-1.5 0.67157-1.5 1.5 0.67157 1.5 1.5 1.5m-3.5 9c-4.4183 0-8-3.5817-8-8s3.5817-8 8-8c1.4367-0.016553 1.4581-1.9613 0-2-5.53 0-10 4.5-10 10 0 5.5228 4.4772 10 10 10s10-4.4772 10-10c0-1.0544-2-1.0324-2 0 0 4.4183-3.5817 8-8 8"/>
+  <path d="m18.908 0c-0.33046 0-0.61972 0.12233-0.80078 0.36133-0.18106 0.239-0.25586 0.56747-0.25586 0.97266v2.6523h-2.2715c-0.38896 0-0.70598 0.064394-0.94727 0.21875-0.26371 0.15646-0.38672 0.4669-0.38672 0.83789 0 0.36179 0.12302 0.66715 0.38086 0.83398l0.001953 0.0019531h0.001953c0.24918 0.15228 0.56865 0.21875 0.94922 0.21875h2.2715v2.6543c0 0.40519 0.074767 0.73218 0.25586 0.9707 0.18109 0.23852 0.46892 0.35944 0.79883 0.36133 0.32038 0.001837 0.60667-0.12152 0.78906-0.35937 0.18239-0.23785 0.26374-0.56552 0.26758-0.9707v-0.0019531-2.6543h2.2559c0.41061 0 0.74047-0.073348 0.98242-0.25391s0.36719-0.46969 0.36719-0.80078c0-0.33109-0.12524-0.62218-0.36719-0.80273s-0.57181-0.25391-0.98242-0.25391h-2.2559v-2.6523c0-0.38896-0.064393-0.70598-0.21875-0.94727-0.15646-0.26371-0.46495-0.38672-0.83594-0.38672z"/>
+</svg>

main/data/theme.css

@@ -82,6 +82,8 @@ window.dino-main .dino-sidebar > frame {
     border-bottom: 1px solid @borders;
 }
 
+/* Message */
+
 .message-box {
     transition: background .05s ease;
 }
@@ -107,6 +109,21 @@ window.dino-main .dino-conversation .message-box.error:hover {
     background: alpha(@error_color, 0.12);
 }
 
+/* Message Menu */
+
+.message-menu-box {
+    background-color: @theme_base_color;
+    border: 1px solid alpha(@theme_fg_color, 0.15);
+    border-radius: 5px;
+}
+
+.message-menu-button {
+    padding: 6px;
+    border: none;
+}
+
+/* Fie Widget */
+
 window.dino-main .file-box-outer,
 window.dino-main .call-box-outer {
     background: @theme_base_color;
@@ -140,6 +157,8 @@ window.dino-main .file-image-widget .file-box-outer button:hover {
     background: rgba(100, 100, 100, 0.5);
 }
 
+/* Call widget */
+
 window.dino-main .call-box-outer.incoming {
     border-color: alpha(@theme_selected_bg_color, 0.3);
 }
@@ -153,6 +172,39 @@ window.dino-main .multiparty-participants {
     background: alpha(@theme_fg_color, 0.04);
 }
 
+/* Reactions */
+
+window.dino-main button.reaction-box,
+window.dino-main menubutton.reaction-box > button {
+    border: 1px solid transparent;
+    padding: 3px 5px ;
+    border-radius: 10px;
+    background-color: alpha(@theme_fg_color, 0.05);
+    background-image: none;
+    box-shadow: none;
+    min-height: 0;
+    min-width: 0;
+}
+
+window.dino-main button.reaction-box.own-reaction,
+window.dino-main menubutton.reaction-box.own-reaction > button {
+    color: mix(@theme_selected_bg_color, @theme_fg_color, 0.4);
+    border-color: @theme_selected_bg_color;
+    background-color: alpha(@theme_selected_bg_color, 0.05);
+}
+
+window.dino-main button.reaction-box:hover,
+window.dino-main menubutton.reaction-box:hover > button {
+    background-color: alpha(@theme_fg_color, 0.1);
+}
+
+window.dino-main button.reaction-box.own-reaction:hover,
+window.dino-main menubutton.reaction-box.own-reaction > button {
+    background-color: alpha(@theme_selected_bg_color, 0.2);
+}
+
+/* Sidebar */
+
 window.dino-main .dino-sidebar > frame.collapsed {
     border-bottom: 1px solid @borders;
 }
@@ -165,6 +217,8 @@ window.dino-main .dino-sidebar frame.auto-complete list > row {
     transition: none;
 }
 
+/* File overlay */
+
 window.dino-main .dino-white-overlay {
     background: @theme_base_color;
 }
@@ -175,6 +229,8 @@ window.dino-main .dino-file-overlay {
     box-shadow: 0 2px 3px alpha(black, 0.1);
 }
 
+/* Chat Input*/
+
 window.dino-main .dino-chatinput frame box {
     background: transparent;
 }

main/src/ui/conversation_content_view/conversation_item_skeleton.vala

@@ -32,6 +32,7 @@ public class ConversationItemSkeleton : Plugins.ConversationItemWidgetInterface,
     public Entities.Message.Marked item_mark { get; set; }
     public ContentMetaItem content_meta_item = null;
     public Widget? widget = null;
+    private ReactionsController? reactions_controller = null;
 
     private uint time_update_timeout = 0;
     private ulong updated_roster_handler_id = 0;
@@ -64,6 +65,15 @@ public class ConversationItemSkeleton : Plugins.ConversationItemWidgetInterface,
         this.notify["show-skeleton"].connect(update_margin);
         this.notify["show-skeleton"].connect(set_header);
 
+        ContentMetaItem? content_meta_item = item as ContentMetaItem;
+        if (content_meta_item != null) {
+            reactions_controller = new ReactionsController(conversation, content_meta_item.content_item, stream_interactor);
+            reactions_controller.box_activated.connect((widget) => {
+                main_grid.attach(widget, 1, 2, 4, 1);
+            });
+            reactions_controller.init();
+        }
+
         update_margin();
     }
 

main/src/ui/conversation_content_view/conversation_view.vala

@@ -15,19 +15,20 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
     [GtkChild] public unowned ScrolledWindow scrolled;
     [GtkChild] private unowned Revealer notification_revealer;
     [GtkChild] private unowned Box message_menu_box;
-    [GtkChild] private unowned Button button1;
-    [GtkChild] private unowned Image button1_icon;
     [GtkChild] private unowned Box notifications;
     [GtkChild] private unowned Box main;
     [GtkChild] private unowned Box main_wrap_box;
     [GtkChild] private unowned Stack stack;
 
+    private ArrayList<Widget> action_buttons = new ArrayList<Widget>();
+    private Gee.List<Dino.Plugins.MessageAction>? message_actions = null;
+
     private StreamInteractor stream_interactor;
     private Gee.TreeSet<Plugins.MetaConversationItem> content_items = new Gee.TreeSet<Plugins.MetaConversationItem>(compare_meta_items);
     private Gee.TreeSet<Plugins.MetaConversationItem> meta_items = new TreeSet<Plugins.MetaConversationItem>(compare_meta_items);
     private Gee.HashMap<Plugins.MetaConversationItem, ConversationItemSkeleton> item_item_skeletons = new Gee.HashMap<Plugins.MetaConversationItem, ConversationItemSkeleton>();
     private Gee.HashMap<Plugins.MetaConversationItem, Widget> widgets = new Gee.HashMap<Plugins.MetaConversationItem, Widget>();
-    private Gee.List<ConversationItemSkeleton> item_skeletons = new Gee.ArrayList<ConversationItemSkeleton>();
+    private Gee.List<Widget> widget_order = new Gee.ArrayList<Widget>();
     private ContentProvider content_populator;
     private SubscriptionNotitication subscription_notification;
 
@@ -81,11 +82,6 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         main.add_controller(main_motion_events);
         main_motion_events.motion.connect(update_highlight);
 
-        button1.clicked.connect(() => {
-            current_meta_item.get_item_actions(Plugins.WidgetType.GTK4)[0].callback(button1, current_meta_item, currently_highlighted);
-            update_message_menu();
-        });
-
         return this;
     }
 
@@ -107,7 +103,20 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         }
     }
 
+    private bool is_highlight_fixed() {
+        foreach (Widget widget in action_buttons) {
+            MenuButton? menu_button = widget as MenuButton;
+            if (menu_button != null && menu_button.popover.visible) return true;
+
+            ToggleButton? toggle_button = widget as ToggleButton;
+            if (toggle_button != null && toggle_button.active) return true;
+        }
+        return false;
+    }
+
     private void on_leave_notify_event() {
+        if (is_highlight_fixed()) return;
+
         if (currently_highlighted != null) {
             currently_highlighted.remove_css_class("highlight");
             currently_highlighted = null;
@@ -116,6 +125,8 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
     }
 
     private void update_highlight(double x, double y) {
+        if (is_highlight_fixed()) return;
+
         if (currently_highlighted != null && (last_y - y).abs() <= 2) {
             return;
         }
@@ -174,11 +185,42 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
             return;
         }
 
-        var actions = current_meta_item.get_item_actions(Plugins.WidgetType.GTK4);
+        foreach (Widget widget in action_buttons) {
-        message_menu_box.visible = actions != null && actions.size > 0;
+            message_menu_box.remove(widget);
-        if (actions != null && actions.size == 1) {
+        }
-            button1.visible = true;
+        action_buttons.clear();
-            button1_icon.set_from_icon_name(actions[0].icon_name);
+
+        message_actions = current_meta_item.get_item_actions(Plugins.WidgetType.GTK4);
+
+        if (message_actions != null) {
+            message_menu_box.visible = true;
+
+            // Configure as many buttons as we need with the actions for the current meta item
+            for (int i = 0; i < message_actions.size; i++) {
+                if (message_actions[i].popover != null) {
+                    MenuButton button = new MenuButton();
+                    button.icon_name = message_actions[i].icon_name;
+                    button.set_popover(message_actions[i].popover as Popover);
+                    action_buttons.add(button);
+                }
+
+                if (message_actions[i].callback != null) {
+                    var message_action = message_actions[i];
+                    Button button = new Button();
+                    button.icon_name = message_action.icon_name;
+                    button.clicked.connect(() => {
+                        print(@"$(current_meta_item.jid) skdfj \n");
+                        message_action.callback(button, current_meta_item, currently_highlighted);
+                    });
+                    action_buttons.add(button);
+                }
+            }
+
+            foreach (Widget widget in action_buttons) {
+                message_menu_box.append(widget);
+            }
+        } else {
+            message_menu_box.visible = false;
         }
     }
 
@@ -309,7 +351,7 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         if (skeleton != null) {
             main.remove(skeleton.get_widget());
             widgets.unset(item);
-            item_skeletons.remove(skeleton);
+            widget_order.remove(skeleton.get_widget());
             item_item_skeletons.unset(item);
 
             content_items.remove(item);
@@ -353,8 +395,8 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         // Fill datastructure
         ConversationItemSkeleton item_skeleton = new ConversationItemSkeleton(stream_interactor, conversation, item, !animate);
         item_item_skeletons[item] = item_skeleton;
-        int index = lower_item != null ? item_skeletons.index_of(item_item_skeletons[lower_item]) + 1 : 0;
+        int index = lower_item != null ? widget_order.index_of(item_item_skeletons[lower_item].get_widget()) + 1 : 0;
-        item_skeletons.insert(index, item_skeleton);
+        widget_order.insert(index, item_skeleton.get_widget());
 
         // Insert widget
         widgets[item] = item_skeleton.get_widget();
@@ -382,7 +424,7 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         // If an item from the past was added, add everything between that item and the (post-)first present item
         if (index == 0) {
             Dino.Application app = Dino.Application.get_default();
-            if (item_skeletons.size == 1) {
+            if (widget_order.size == 1) {
                 foreach (Plugins.ConversationAdditionPopulator populator in app.plugin_registry.conversation_addition_populators) {
                     populator.populate_timespan(conversation, item.time, new DateTime.now_utc());
                 }
@@ -404,6 +446,15 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
             (upper_item.mark == Message.Marked.WONTSEND) == (lower_item.mark == Message.Marked.WONTSEND);
     }
 
+    private void on_action_button_clicked(ToggleButton button) {
+        int button_idx = action_buttons.index_of(button);
+        print(button_idx.to_string() + "\n");
+        Plugins.MessageAction message_action = message_actions[button_idx];
+        if (message_action.callback != null) {
+            message_action.callback(button, current_meta_item, currently_highlighted);
+        }
+    }
+
     private void on_upper_notify() {
         if (was_upper == null || scrolled.vadjustment.value >  was_upper - was_page_size - 1) { // scrolled down or content smaller than page size
             if (at_current_content) {
@@ -471,7 +522,7 @@ public class ConversationView : Widget, Plugins.ConversationItemCollection, Plug
         was_page_size = null;
         content_items.clear();
         meta_items.clear();
-        item_skeletons.clear();
+        widget_order.clear();
         item_item_skeletons.clear();
         foreach (Widget widget in widgets.values) {
             main.remove(widget);

main/src/ui/conversation_content_view/message_widget.vala

@@ -22,6 +22,7 @@ public class MessageMetaItem : ContentMetaItem {
 
     MessageItemEditMode? edit_mode = null;
     ChatTextViewController? controller = null;
+    private bool supports_reaction = false;
     AdditionalInfo additional_info = AdditionalInfo.NONE;
 
     ulong realize_id = -1;
@@ -35,6 +36,8 @@ public class MessageMetaItem : ContentMetaItem {
         message_item = content_item as MessageItem;
         this.stream_interactor = stream_interactor;
 
+        init.begin();
+
         label.activate_link.connect(on_label_activate_link);
 
         Message message = ((MessageItem) content_item).message;
@@ -68,6 +71,10 @@ public class MessageMetaItem : ContentMetaItem {
         update_label();
     }
 
+    private async void init() {
+        supports_reaction = yield stream_interactor.get_module(Reactions.IDENTITY).conversation_supports_reactions(message_item.conversation);
+    }
+
     private string generate_markup_text(ContentItem item) {
         MessageItem message_item = item as MessageItem;
         Conversation conversation = message_item.conversation;
@@ -187,11 +194,13 @@ public class MessageMetaItem : ContentMetaItem {
     }
 
     public override Gee.List<Plugins.MessageAction>? get_item_actions(Plugins.WidgetType type) {
-        if (content_item as FileItem != null) return null;
+        if (content_item as FileItem != null || this.in_edit_mode) return null;
+        if (in_edit_mode) return null;
 
-        bool allowed = stream_interactor.get_module(MessageCorrection.IDENTITY).is_own_correction_allowed(message_item.conversation, message_item.message);
         Gee.List<Plugins.MessageAction> actions = new ArrayList<Plugins.MessageAction>();
-        if (allowed && !in_edit_mode) {
+
+        bool correction_allowed = stream_interactor.get_module(MessageCorrection.IDENTITY).is_own_correction_allowed(message_item.conversation, message_item.message);
+        if (correction_allowed) {
             Plugins.MessageAction action1 = new Plugins.MessageAction();
             action1.icon_name = "document-edit-symbolic";
             action1.callback = (button, content_meta_item_activated, widget) => {
@@ -199,6 +208,17 @@ public class MessageMetaItem : ContentMetaItem {
             };
             actions.add(action1);
         }
+
+        if (supports_reaction) {
+            Plugins.MessageAction action2 = new Plugins.MessageAction();
+            action2.icon_name = "dino-emoticon-add-symbolic";
+            EmojiChooser chooser = new EmojiChooser();
+            chooser.emoji_picked.connect((emoji) => {
+                stream_interactor.get_module(Reactions.IDENTITY).add_reaction(message_item.conversation, message_item, emoji);
+            });
+            action2.popover = chooser;
+            actions.add(action2);
+        }
         return actions;
     }
 

main/src/ui/conversation_content_view/reactions_widget.vala

@@ -0,0 +1,192 @@
+using Gee;
+using Gtk;
+
+using Dino.Entities;
+using Xmpp;
+
+namespace Dino.Ui.ConversationSummary {
+
+public class ReactionsController : Object {
+    public signal void box_activated(Widget widget);
+
+    private Conversation conversation;
+    private Account account;
+    private ContentItem content_item;
+    private StreamInteractor stream_interactor;
+
+    private HashMap<string, Gee.List<Jid>> reactions = new HashMap<string, Gee.List<Jid>>();
+
+    private ReactionsWidget? widget = null;
+
+    public ReactionsController(Conversation conversation, ContentItem content_item, StreamInteractor stream_interactor) {
+        this.conversation = conversation;
+        this.account = conversation.account;
+        this.content_item = content_item;
+        this.stream_interactor = stream_interactor;
+    }
+
+    public void init() {
+        Gee.List<ReactionUsers> reactions = stream_interactor.get_module(Reactions.IDENTITY).get_item_reactions(conversation, content_item);
+        if (reactions.size > 0) {
+            initialize_widget();
+        }
+        foreach (ReactionUsers reaction_users in reactions) {
+            foreach (Jid jid in reaction_users.jids) {
+                reaction_added(reaction_users.reaction, jid);
+            }
+        }
+
+        stream_interactor.get_module(Reactions.IDENTITY).reaction_added.connect((account, content_item_id, jid, reaction) => {
+            if (this.content_item.id == content_item_id) {
+                reaction_added(reaction, jid);
+            }
+        });
+        stream_interactor.get_module(Reactions.IDENTITY).reaction_removed.connect((account, content_item_id, jid, reaction) => {
+            if (this.content_item.id == content_item_id) {
+                reaction_removed(reaction, jid);
+            }
+        });
+    }
+
+    private void initialize_widget() {
+        widget = new ReactionsWidget() { visible=true };
+        widget.emoji_picked.connect((emoji) => {
+            stream_interactor.get_module(Reactions.IDENTITY).add_reaction(conversation, content_item, emoji);
+        });
+        widget.emoji_clicked.connect((emoji) => {
+            if (account.bare_jid in reactions[emoji]) {
+                stream_interactor.get_module(Reactions.IDENTITY).remove_reaction(conversation, content_item, emoji);
+            } else {
+                stream_interactor.get_module(Reactions.IDENTITY).add_reaction(conversation, content_item, emoji);
+            }
+        });
+        box_activated(widget);
+    }
+
+    public void reaction_added(string reaction, Jid jid) {
+        if (widget == null) {
+            initialize_widget();
+        }
+
+        if (!reactions.has_key(reaction)) {
+            reactions[reaction] = new ArrayList<Jid>(Jid.equals_func);
+        }
+        if (jid.equals_bare(account.bare_jid) && reactions[reaction].contains(jid)) {
+            return;
+        }
+        reactions[reaction].add(jid);
+
+        if (reactions[reaction].size == 0) return;
+
+        widget.update_reaction(reaction, reactions[reaction].size, reactions[reaction].contains(account.bare_jid), update_tooltip(reaction));
+    }
+
+    public void reaction_removed(string reaction, Jid jid) {
+        if (!reactions.has_key(reaction)) return;
+        reactions[reaction].remove(jid);
+
+        if (reactions[reaction].size > 0) {
+            widget.update_reaction(reaction, reactions[reaction].size, reactions[reaction].contains(account.bare_jid), update_tooltip(reaction));
+        } else {
+            widget.remove_reaction(reaction);
+            reactions.unset(reaction);
+        }
+
+        if (reactions.size == 0) {
+            widget.unparent();
+            widget = null;
+        }
+    }
+
+    private Gee.List<string> update_tooltip(string reaction) {
+        var name_list = new ArrayList<string>();
+        if (reactions[reaction].size > 0) {
+            if (account.bare_jid in reactions[reaction]) {
+                name_list.add(_("You"));
+            }
+            foreach (Jid jid in reactions[reaction]) {
+                if (jid.equals(account.bare_jid)) continue;
+
+                name_list.add(Util.get_participant_display_name(stream_interactor, conversation, jid));
+            }
+        }
+        return name_list;
+    }
+}
+
+public class ReactionsWidget : Grid {
+
+    public signal void emoji_picked(string emoji);
+    public signal void emoji_clicked(string emoji);
+
+    private HashMap<string, Label> reaction_counts = new HashMap<string, Label>();
+    private HashMap<string, Button> reaction_buttons = new HashMap<string, Button>();
+    private MenuButton add_button;
+
+    public ReactionsWidget() {
+        this.row_spacing = this.column_spacing = 5;
+        this.margin_top = 2;
+
+        add_button = new MenuButton() { tooltip_text= _("Add reaction"), visible=true };
+        add_button.get_style_context().add_class("reaction-box");
+        Image add_image = new Image.from_icon_name("dino-emoticon-add-symbolic") { margin_start=5, margin_end=5, visible=true };
+        add_button.set_child(add_image);
+
+        EmojiChooser chooser = new EmojiChooser();
+        chooser.emoji_picked.connect((emoji) => {
+            emoji_picked(emoji);
+        });
+        add_button.set_popover(chooser);
+    }
+
+    public void update_reaction(string reaction, int count, bool own, Gee.List<string> names) {
+        if (!reaction_buttons.has_key(reaction)) {
+            Label reaction_label = new Label("<span size='small'>" + reaction + "</span>") { use_markup=true, visible=true };
+            Label count_label = new Label("") { use_markup=true, visible=true };
+            Button button = new Button() { visible=true };
+            button.get_style_context().add_class("reaction-box");
+            Box reaction_box = new Box(Orientation.HORIZONTAL, 4) { visible=true };
+            reaction_box.append(reaction_label);
+            reaction_box.append(count_label);
+            button.set_child(reaction_box);
+
+            reaction_counts[reaction] = count_label;
+            reaction_buttons[reaction] = button;
+
+            this.attach(button, (reaction_buttons.size - 1) % 10, (reaction_buttons.size - 1) / 10, 1, 1);
+            if (add_button.get_parent() != null) this.remove(add_button);
+            this.attach(add_button, reaction_buttons.size % 10, reaction_buttons.size / 10, 1, 1);
+
+
+            button.clicked.connect(() => {
+                emoji_clicked(reaction);
+            });
+        }
+
+        reaction_counts[reaction].label = "<span size='small'>" + count.to_string() + "</span>";
+        if (own) {
+            reaction_buttons[reaction].get_style_context().add_class("own-reaction");
+        } else {
+            reaction_buttons[reaction].get_style_context().remove_class("own-reaction");
+        }
+
+        // Build tooltip
+        StringBuilder tooltip_builder = new StringBuilder ();
+        for (int i = 0; i < names.size - 1; i++) {
+            tooltip_builder.append(names[i]);
+            if (i < names.size - 2) tooltip_builder.append(", ");
+        }
+        if (names.size > 1) {
+            tooltip_builder.append(" and ");
+        }
+        tooltip_builder.append(names[names.size - 1]);
+        tooltip_builder.append(" reacted with " + reaction);
+        reaction_buttons[reaction].set_tooltip_text(tooltip_builder.str);
+    }
+
+    public void remove_reaction(string reaction) {
+        reaction_buttons[reaction].unparent();
+    }
+}
+
+}

xmpp-vala/CMakeLists.txt

@@ -141,6 +141,8 @@ SOURCES
     "src/module/xep/0380_explicit_encryption.vala"
     "src/module/xep/0391_jingle_encrypted_transports.vala"
     "src/module/xep/0410_muc_self_ping.vala"
+    "src/module/xep/0421_occupant_ids.vala"
+    "src/module/xep/0444_reactions.vala"
     "src/module/xep/pixbuf_storage.vala"
 
     "src/util.vala"

xmpp-vala/src/module/xep/0421_occupant_ids.vala

@@ -0,0 +1,45 @@
+namespace Xmpp.Xep.OccupantIds {
+
+public const string NS_URI = "urn:xmpp:occupant-id:0";
+
+public static string? get_occupant_id(StanzaNode stanza) {
+    StanzaNode? node = stanza.get_subnode("occupant-id", NS_URI);
+    if (node == null) return null;
+
+    return node.get_attribute("id");
+}
+
+public class Module : XmppStreamModule {
+    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0421_occupant_ids");
+
+    public signal void received_occupant_id(XmppStream stream, Jid jid, string occupant_id);
+    public signal void received_own_occupant_id(XmppStream stream, Jid jid, string occupant_id);
+
+    public override void attach(XmppStream stream) {
+        stream.get_module(Presence.Module.IDENTITY).received_available.connect(parse_occupant_id_from_presence);
+    }
+
+    public override void detach(XmppStream stream) {
+        stream.get_module(Presence.Module.IDENTITY).received_available.disconnect(parse_occupant_id_from_presence);
+    }
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+
+    public void parse_occupant_id_from_presence(XmppStream stream, Presence.Stanza presence) {
+        string? occupant_id = get_occupant_id(presence.stanza);
+        if (occupant_id == null) return;
+
+        received_occupant_id(stream, presence.from, occupant_id);
+
+        StanzaNode? x_node = presence.stanza.get_subnode("x", "http://jabber.org/protocol/muc#user");
+        if (x_node == null) return;
+        foreach (StanzaNode status_node in x_node.get_subnodes("status", "http://jabber.org/protocol/muc#user")) {
+            if (int.parse(status_node.get_attribute("code")) == 110) {
+                received_own_occupant_id(stream, presence.from, occupant_id);
+            }
+        }
+    }
+}
+
+}

xmpp-vala/src/module/xep/0444_reactions.vala

@@ -0,0 +1,74 @@
+using Gee;
+
+namespace Xmpp.Xep.Reactions {
+
+public const string NS_URI = "urn:xmpp:reactions:0";
+
+public class Module : XmppStreamModule {
+    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "reactions");
+
+    public signal void received_reactions(XmppStream stream, Jid from_jid, string message_id, Gee.List<string> reactions, MessageStanza stanza);
+
+    private ReceivedPipelineListener received_pipeline_listener = new ReceivedPipelineListener();
+
+    public void send_reaction(XmppStream stream, Jid jid, string stanza_type, string message_id, Gee.List<string> reactions) {
+        StanzaNode reactions_node = new StanzaNode.build("reactions", NS_URI).add_self_xmlns();
+        reactions_node.put_attribute("to", message_id);
+        foreach (string reaction in reactions) {
+            StanzaNode reaction_node = new StanzaNode.build("reaction", NS_URI);
+            reaction_node.put_node(new StanzaNode.text(reaction));
+            reactions_node.put_node(reaction_node);
+        }
+
+        MessageStanza message = new MessageStanza() { to=jid, type_=stanza_type };
+        message.stanza.put_node(reactions_node);
+
+        MessageProcessingHints.set_message_hint(message, MessageProcessingHints.HINT_STORE);
+
+        stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, message);
+    }
+
+    public override void attach(XmppStream stream) {
+        stream.get_module(ServiceDiscovery.Module.IDENTITY).add_feature(stream, NS_URI);
+        stream.get_module(MessageModule.IDENTITY).received_pipeline.connect(received_pipeline_listener);
+    }
+
+    public override void detach(XmppStream stream) {
+        stream.get_module(ServiceDiscovery.Module.IDENTITY).remove_feature(stream, NS_URI);
+        stream.get_module(MessageModule.IDENTITY).received_pipeline.disconnect(received_pipeline_listener);
+    }
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+}
+
+public class ReceivedPipelineListener : StanzaListener<MessageStanza> {
+
+    private const string[] after_actions_const = {"EXTRACT_MESSAGE_2"};
+
+    public override string action_group { get { return ""; } }
+    public override string[] after_actions { get { return after_actions_const; } }
+
+    public override async bool run(XmppStream stream, MessageStanza message) {
+        StanzaNode? reactions_node = message.stanza.get_subnode("reactions", NS_URI);
+        if (reactions_node == null) return false;
+
+        string? to_attribute = reactions_node.get_attribute("to");
+        if (to_attribute == null) return false;
+
+        Gee.List<string> reactions = new ArrayList<string>();
+        foreach (StanzaNode reaction_node in reactions_node.get_subnodes("reaction", NS_URI)) {
+            string? reaction = reaction_node.get_string_content();
+            if (reaction == null) return false;
+
+            if (!reactions.contains(reaction)) {
+                reactions.add(reaction);
+            }
+        }
+        stream.get_module(Module.IDENTITY).received_reactions(stream, message.from, to_attribute, reactions, message);
+
+        return false;
+    }
+}
+
+}