using Gee; using Xmpp; using Xmpp.Xep; using Dino.Entities; using Qlite; namespace Dino { public class MessageProcessor : StreamInteractionModule, Object { public static ModuleIdentity IDENTITY = new ModuleIdentity("message_processor"); public string id { get { return IDENTITY.id; } } public signal void message_received(Entities.Message message, Conversation conversation); public signal void build_message_stanza(Entities.Message message, Xmpp.MessageStanza message_stanza, Conversation conversation); public signal void pre_message_send(Entities.Message message, Xmpp.MessageStanza message_stanza, Conversation conversation); public signal void message_sent(Entities.Message message, Conversation conversation); public signal void history_synced(Account account); public MessageListenerHolder received_pipeline = new MessageListenerHolder(); private StreamInteractor stream_interactor; private Database db; private Object lock_send_unsent; private HashMap current_catchup_id = new HashMap(Account.hash_func, Account.equals_func); private HashMap> mam_times = new HashMap>(); public HashMap hitted_range = new HashMap(); public HashMap catchup_until_id = new HashMap(Account.hash_func, Account.equals_func); public HashMap catchup_until_time = new HashMap(Account.hash_func, Account.equals_func); public static void start(StreamInteractor stream_interactor, Database db) { MessageProcessor m = new MessageProcessor(stream_interactor, db); stream_interactor.add_module(m); } private MessageProcessor(StreamInteractor stream_interactor, Database db) { this.stream_interactor = stream_interactor; this.db = db; received_pipeline.connect(new DeduplicateMessageListener(this, db)); received_pipeline.connect(new FilterMessageListener()); received_pipeline.connect(new StoreMessageListener(stream_interactor)); received_pipeline.connect(new MamMessageListener(stream_interactor)); stream_interactor.account_added.connect(on_account_added); stream_interactor.connection_manager.connection_state_changed.connect((account, state) => { if (state == ConnectionManager.ConnectionState.CONNECTED) send_unsent_messages(account); }); stream_interactor.connection_manager.stream_opened.connect((account, stream) => { debug("MAM: [%s] Reset catchup_id", account.bare_jid.to_string()); current_catchup_id.unset(account); mam_times[account] = new HashMap(); }); } public Entities.Message send_text(string text, Conversation conversation) { Entities.Message message = create_out_message(text, conversation); return send_message(message, conversation); } public Entities.Message send_message(Entities.Message message, Conversation conversation) { stream_interactor.get_module(MessageStorage.IDENTITY).add_message(message, conversation); send_xmpp_message(message, conversation); message_sent(message, conversation); return message; } public void send_unsent_messages(Account account, Jid? jid = null) { Gee.List unsend_messages = db.get_unsend_messages(account, jid); foreach (Entities.Message message in unsend_messages) { Conversation? msg_conv = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(message.counterpart, account); if (msg_conv != null) { send_xmpp_message(message, msg_conv, true); } } } private void on_account_added(Account account) { stream_interactor.module_manager.get_module(account, Xmpp.MessageModule.IDENTITY).received_message.connect( (stream, message) => { on_message_received.begin(account, message); }); XmppStream? stream_bak = null; stream_interactor.module_manager.get_module(account, Xmpp.Xep.MessageArchiveManagement.Module.IDENTITY).feature_available.connect( (stream) => { if (stream == stream_bak) return; current_catchup_id.unset(account); stream_bak = stream; debug("MAM: [%s] MAM available", account.bare_jid.to_string()); do_mam_catchup.begin(account); }); stream_interactor.module_manager.get_module(account, Xmpp.MessageModule.IDENTITY).received_message_unprocessed.connect((stream, message) => { if (!message.from.equals(account.bare_jid)) return; Xep.MessageArchiveManagement.Flag? mam_flag = stream != null ? stream.get_flag(Xep.MessageArchiveManagement.Flag.IDENTITY) : null; if (mam_flag == null) return; string? id = message.stanza.get_deep_attribute(mam_flag.ns_ver + ":result", "id"); if (id == null) return; StanzaNode? delay_node = message.stanza.get_deep_subnode(mam_flag.ns_ver + ":result", "urn:xmpp:forward:0:forwarded", "urn:xmpp:delay:delay"); if (delay_node == null) return; DateTime? time = DelayedDelivery.Module.get_time_for_node(delay_node); if (time == null) return; mam_times[account][id] = time; string? query_id = message.stanza.get_deep_attribute(mam_flag.ns_ver + ":result", mam_flag.ns_ver + ":queryid"); if (query_id != null && id == catchup_until_id[account]) { debug("MAM: [%s] Hitted range (id) %s", account.bare_jid.to_string(), id); hitted_range[query_id] = -2; } }); } private async void do_mam_catchup(Account account) { debug("MAM: [%s] Start catchup", account.bare_jid.to_string()); string? earliest_id = null; DateTime? earliest_time = null; bool continue_sync = true; while (continue_sync) { continue_sync = false; // Get previous row var previous_qry = db.mam_catchup.select().with(db.mam_catchup.account_id, "=", account.id).order_by(db.mam_catchup.to_time, "DESC"); if (current_catchup_id.has_key(account)) { previous_qry.with(db.mam_catchup.id, "!=", current_catchup_id[account]); } RowOption previous_row = previous_qry.single().row(); if (previous_row.is_present()) { catchup_until_id[account] = previous_row[db.mam_catchup.to_id]; catchup_until_time[account] = (new DateTime.from_unix_utc(previous_row[db.mam_catchup.to_time])).add_minutes(-5); debug("MAM: [%s] Previous entry exists", account.bare_jid.to_string()); } else { catchup_until_id.unset(account); catchup_until_time.unset(account); } string query_id = Xmpp.random_uuid(); yield get_mam_range(account, query_id, null, null, earliest_time, earliest_id); if (!hitted_range.has_key(query_id)) { debug("MAM: [%s] Set catchup end reached", account.bare_jid.to_string()); db.mam_catchup.update() .set(db.mam_catchup.from_end, true) .with(db.mam_catchup.id, "=", current_catchup_id[account]) .perform(); } if (hitted_range.has_key(query_id)) { if (merge_ranges(account, null)) { RowOption current_row = db.mam_catchup.row_with(db.mam_catchup.id, current_catchup_id[account]); bool range_from_complete = current_row[db.mam_catchup.from_end]; if (!range_from_complete) { continue_sync = true; earliest_id = current_row[db.mam_catchup.from_id]; earliest_time = (new DateTime.from_unix_utc(current_row[db.mam_catchup.from_time])).add_seconds(1); } } } } } /* * Merges the row with `current_catchup_id` with the previous range (optional: with `earlier_id`) * Changes `current_catchup_id` to the previous range */ private bool merge_ranges(Account account, int? earlier_id) { RowOption current_row = db.mam_catchup.row_with(db.mam_catchup.id, current_catchup_id[account]); RowOption previous_row = null; if (earlier_id != null) { previous_row = db.mam_catchup.row_with(db.mam_catchup.id, earlier_id); } else { previous_row = db.mam_catchup.select() .with(db.mam_catchup.account_id, "=", account.id) .with(db.mam_catchup.id, "!=", current_catchup_id[account]) .order_by(db.mam_catchup.to_time, "DESC").single().row(); } if (!previous_row.is_present()) { debug("MAM: [%s] Merging: No previous row", account.bare_jid.to_string()); return false; } var qry = db.mam_catchup.update().with(db.mam_catchup.id, "=", previous_row[db.mam_catchup.id]); debug("MAM: [%s] Merging %ld-%ld with %ld- %ld", account.bare_jid.to_string(), previous_row[db.mam_catchup.from_time], previous_row[db.mam_catchup.to_time], current_row[db.mam_catchup.from_time], current_row[db.mam_catchup.to_time]); if (current_row[db.mam_catchup.from_time] < previous_row[db.mam_catchup.from_time]) { qry.set(db.mam_catchup.from_id, current_row[db.mam_catchup.from_id]) .set(db.mam_catchup.from_time, current_row[db.mam_catchup.from_time]); } if (current_row[db.mam_catchup.to_time] > previous_row[db.mam_catchup.to_time]) { qry.set(db.mam_catchup.to_id, current_row[db.mam_catchup.to_id]) .set(db.mam_catchup.to_time, current_row[db.mam_catchup.to_time]); } qry.perform(); current_catchup_id[account] = previous_row[db.mam_catchup.id]; db.mam_catchup.delete().with(db.mam_catchup.id, "=", current_row[db.mam_catchup.id]).perform(); return true; } private async bool get_mam_range(Account account, string? query_id, DateTime? from_time, string? from_id, DateTime? to_time, string? to_id) { debug("MAM: [%s] Get range %s - %s", account.bare_jid.to_string(), from_time != null ? from_time.to_string() : "", to_time != null ? to_time.to_string() : ""); XmppStream stream = stream_interactor.get_stream(account); Iq.Stanza? iq = yield stream.get_module(Xep.MessageArchiveManagement.Module.IDENTITY).query_archive(stream, null, query_id, from_time, from_id, to_time, to_id); if (iq == null) { debug(@"MAM: [%s] IQ null", account.bare_jid.to_string()); return true; } if (iq.stanza.get_deep_string_content("urn:xmpp:mam:2:fin", "http://jabber.org/protocol/rsm" + ":set", "first") == null) { return true; } while (iq != null) { debug("MAM: [%s] IN: %s", account.bare_jid.to_string(), iq.stanza.to_string()); string? earliest_id = iq.stanza.get_deep_string_content("urn:xmpp:mam:2:fin", "http://jabber.org/protocol/rsm" + ":set", "first"); if (earliest_id == null) return true; if (!mam_times[account].has_key(earliest_id)) error("wtf"); debug("MAM: [%s] Update from_id %s\n", account.bare_jid.to_string(), earliest_id); if (!current_catchup_id.has_key(account)) { debug("MAM: [%s] We get our first MAM page", account.bare_jid.to_string()); string? latest_id = iq.stanza.get_deep_string_content("urn:xmpp:mam:2:fin", "http://jabber.org/protocol/rsm" + ":set", "last"); if (!mam_times[account].has_key(latest_id)) error("wtf2"); current_catchup_id[account] = (int) db.mam_catchup.insert() .value(db.mam_catchup.account_id, account.id) .value(db.mam_catchup.from_id, earliest_id) .value(db.mam_catchup.from_time, (long)mam_times[account][earliest_id].to_unix()) .value(db.mam_catchup.to_id, latest_id) .value(db.mam_catchup.to_time, (long)mam_times[account][latest_id].to_unix()) .perform(); } else { // Update existing id db.mam_catchup.update() .set(db.mam_catchup.from_id, earliest_id) .set(db.mam_catchup.from_time, (long)mam_times[account][earliest_id].to_unix()) // need to make sure we have this .with(db.mam_catchup.id, "=", current_catchup_id[account]) .perform(); } TimeSpan catchup_time_ago = (new DateTime.now_utc()).difference(mam_times[account][earliest_id]); int wait_ms = 10; if (catchup_time_ago > 14 * TimeSpan.DAY) { wait_ms = 2000; } else if (catchup_time_ago > 5 * TimeSpan.DAY) { wait_ms = 1000; } else if (catchup_time_ago > 2 * TimeSpan.DAY) { wait_ms = 200; } else if (catchup_time_ago > TimeSpan.DAY) { wait_ms = 50; } mam_times[account] = new HashMap(); Timeout.add(wait_ms, () => { if (hitted_range.has_key(query_id)) { debug(@"MAM: [%s] Hitted contains key %s", account.bare_jid.to_string(), query_id); iq = null; Idle.add(get_mam_range.callback); return false; } stream.get_module(Xep.MessageArchiveManagement.Module.IDENTITY).page_through_results.begin(stream, null, query_id, from_time, to_time, iq, (_, res) => { iq = stream.get_module(Xep.MessageArchiveManagement.Module.IDENTITY).page_through_results.end(res); Idle.add(get_mam_range.callback); }); return false; }); yield; } return false; } private async void on_message_received(Account account, Xmpp.MessageStanza message_stanza) { Entities.Message message = yield parse_message_stanza(account, message_stanza); Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation_for_message(message); if (conversation == null) return; // MAM state database update Xep.MessageArchiveManagement.MessageFlag mam_flag = Xep.MessageArchiveManagement.MessageFlag.get_flag(message_stanza); if (mam_flag == null) { if (current_catchup_id.has_key(account)) { string? stanza_id = UniqueStableStanzaIDs.get_stanza_id(message_stanza, account.bare_jid); if (stanza_id != null) { db.mam_catchup.update() .with(db.mam_catchup.id, "=", current_catchup_id[account]) .set(db.mam_catchup.to_time, (long)message.local_time.to_unix()) .set(db.mam_catchup.to_id, stanza_id) .perform(); } } } bool abort = yield received_pipeline.run(message, message_stanza, conversation); if (abort) return; if (message.direction == Entities.Message.DIRECTION_RECEIVED) { message_received(message, conversation); } else if (message.direction == Entities.Message.DIRECTION_SENT) { message_sent(message, conversation); } } public async Entities.Message parse_message_stanza(Account account, Xmpp.MessageStanza message) { Entities.Message new_message = new Entities.Message(message.body); new_message.account = account; new_message.stanza_id = Xep.UniqueStableStanzaIDs.get_origin_id(message) ?? message.id; Jid? counterpart_override = null; if (message.from.equals(stream_interactor.get_module(MucManager.IDENTITY).get_own_jid(message.from.bare_jid, account))) { new_message.direction = Entities.Message.DIRECTION_SENT; counterpart_override = message.from.bare_jid; } else if (account.bare_jid.equals_bare(message.from)) { new_message.direction = Entities.Message.DIRECTION_SENT; } else { new_message.direction = Entities.Message.DIRECTION_RECEIVED; } new_message.counterpart = counterpart_override ?? (new_message.direction == Entities.Message.DIRECTION_SENT ? message.to : message.from); new_message.ourpart = new_message.direction == Entities.Message.DIRECTION_SENT ? message.from : message.to; XmppStream? stream = stream_interactor.get_stream(account); Xep.MessageArchiveManagement.MessageFlag? mam_message_flag = Xep.MessageArchiveManagement.MessageFlag.get_flag(message); Xep.MessageArchiveManagement.Flag? mam_flag = stream != null ? stream.get_flag(Xep.MessageArchiveManagement.Flag.IDENTITY) : null; if (mam_message_flag != null && mam_flag != null && mam_flag.ns_ver == Xep.MessageArchiveManagement.NS_URI && mam_message_flag.mam_id != null) { new_message.server_id = mam_message_flag.mam_id; } else if (message.type_ == Xmpp.MessageStanza.TYPE_GROUPCHAT) { new_message.server_id = Xep.UniqueStableStanzaIDs.get_stanza_id(message, new_message.counterpart.bare_jid); } else if (message.type_ == Xmpp.MessageStanza.TYPE_CHAT) { new_message.server_id = Xep.UniqueStableStanzaIDs.get_stanza_id(message, account.bare_jid); } if (mam_message_flag != null) new_message.local_time = mam_message_flag.server_time; DateTime now = new DateTime.from_unix_utc(new DateTime.now_utc().to_unix()); // Remove milliseconds. They are not stored in the db and might lead to ordering issues when compared with times from the db. if (new_message.local_time == null || new_message.local_time.compare(now) > 0) new_message.local_time = now; Xep.DelayedDelivery.MessageFlag? delayed_message_flag = Xep.DelayedDelivery.MessageFlag.get_flag(message); if (delayed_message_flag != null) new_message.time = delayed_message_flag.datetime; if (new_message.time == null || new_message.time.compare(new_message.local_time) > 0) new_message.time = new_message.local_time; new_message.type_ = yield determine_message_type(account, message, new_message); return new_message; } private async Entities.Message.Type determine_message_type(Account account, Xmpp.MessageStanza message_stanza, Entities.Message message) { if (message_stanza.type_ == Xmpp.MessageStanza.TYPE_GROUPCHAT) { return Entities.Message.Type.GROUPCHAT; } if (message_stanza.type_ == Xmpp.MessageStanza.TYPE_CHAT) { Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(message.counterpart.bare_jid, account); if (conversation != null) { if (conversation.type_ == Conversation.Type.CHAT) { return Entities.Message.Type.CHAT; } else if (conversation.type_ == Conversation.Type.GROUPCHAT) { return Entities.Message.Type.GROUPCHAT_PM; } } else { SourceFunc callback = determine_message_type.callback; XmppStream stream = stream_interactor.get_stream(account); if (stream != null) stream.get_module(Xep.ServiceDiscovery.Module.IDENTITY).get_entity_categories(stream, message.counterpart.bare_jid, (stream, identities) => { if (identities == null) { message.type_ = Entities.Message.Type.CHAT; Idle.add((owned) callback); return; } foreach (Xep.ServiceDiscovery.Identity identity in identities) { if (identity.category == Xep.ServiceDiscovery.Identity.CATEGORY_CONFERENCE) { message.type_ = Entities.Message.Type.GROUPCHAT_PM; } else { message.type_ = Entities.Message.Type.CHAT; } } Idle.add((owned) callback); }); yield; } } return Entities.Message.Type.CHAT; } private class DeduplicateMessageListener : MessageListener { public string[] after_actions_const = new string[]{ "FILTER_EMPTY", "MUC" }; public override string action_group { get { return "DEDUPLICATE"; } } public override string[] after_actions { get { return after_actions_const; } } private MessageProcessor outer; private Database db; public DeduplicateMessageListener(MessageProcessor outer, Database db) { this.outer = outer; this.db = db; } public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { Account account = conversation.account; Xep.MessageArchiveManagement.MessageFlag? mam_flag = Xep.MessageArchiveManagement.MessageFlag.get_flag(stanza); // Deduplicate by server_id if (message.server_id != null) { QueryBuilder builder = db.message.select() .with(db.message.server_id, "=", message.server_id) .with(db.message.counterpart_id, "=", db.get_jid_id(message.counterpart)) .with(db.message.account_id, "=", account.id); bool duplicate = builder.count() > 0; if (duplicate && mam_flag != null) { debug(@"MAM: [%s] Hitted range duplicate server id. id %s qid %s", account.bare_jid.to_string(), message.server_id, mam_flag.query_id); if (outer.catchup_until_time.has_key(account) && mam_flag.server_time.compare(outer.catchup_until_time[account]) < 0) { outer.hitted_range[mam_flag.query_id] = -1; debug(@"MAM: [%s] In range (time) %s < %s", account.bare_jid.to_string(), mam_flag.server_time.to_string(), outer.catchup_until_time[account].to_string()); } } if (duplicate) return true; } // Deduplicate messages by uuid bool is_uuid = message.stanza_id != null && Regex.match_simple("""[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}""", message.stanza_id); if (is_uuid) { QueryBuilder builder = db.message.select() .with(db.message.stanza_id, "=", message.stanza_id) .with(db.message.counterpart_id, "=", db.get_jid_id(message.counterpart)) .with(db.message.account_id, "=", account.id); if (message.counterpart.resourcepart != null) { builder.with(db.message.counterpart_resource, "=", message.counterpart.resourcepart); } else { builder.with_null(db.message.counterpart_resource); } RowOption row_opt = builder.single().row(); bool duplicate = row_opt.is_present(); if (duplicate && mam_flag != null && row_opt[db.message.server_id] == null && outer.catchup_until_time.has_key(account) && mam_flag.server_time.compare(outer.catchup_until_time[account]) > 0) { outer.hitted_range[mam_flag.query_id] = -1; debug(@"MAM: [%s] Hitted range duplicate message id. id %s qid %s", account.bare_jid.to_string(), message.stanza_id, mam_flag.query_id); } return duplicate; } // Deduplicate messages based on content and metadata QueryBuilder builder = db.message.select() .with(db.message.account_id, "=", account.id) .with(db.message.counterpart_id, "=", db.get_jid_id(message.counterpart)) .with(db.message.body, "=", message.body) .with(db.message.time, "<", (long) message.time.add_minutes(1).to_unix()) .with(db.message.time, ">", (long) message.time.add_minutes(-1).to_unix()); if (message.stanza_id != null) { builder.with(db.message.stanza_id, "=", message.stanza_id); } else { builder.with_null(db.message.stanza_id); } if (message.counterpart.resourcepart != null) { builder.with(db.message.counterpart_resource, "=", message.counterpart.resourcepart); } else { builder.with_null(db.message.counterpart_resource); } return builder.count() > 0; } } private class FilterMessageListener : MessageListener { public string[] after_actions_const = new string[]{ "DECRYPT" }; public override string action_group { get { return "FILTER_EMPTY"; } } public override string[] after_actions { get { return after_actions_const; } } public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { return (message.body == null); } } private class StoreMessageListener : MessageListener { public string[] after_actions_const = new string[]{ "DEDUPLICATE", "DECRYPT", "FILTER_EMPTY" }; public override string action_group { get { return "STORE"; } } public override string[] after_actions { get { return after_actions_const; } } private StreamInteractor stream_interactor; public StoreMessageListener(StreamInteractor stream_interactor) { this.stream_interactor = stream_interactor; } public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { if (message.body == null) return true; stream_interactor.get_module(MessageStorage.IDENTITY).add_message(message, conversation); return false; } } private class MamMessageListener : MessageListener { public string[] after_actions_const = new string[]{ "DEDUPLICATE" }; public override string action_group { get { return "MAM_NODE"; } } public override string[] after_actions { get { return after_actions_const; } } private StreamInteractor stream_interactor; public MamMessageListener(StreamInteractor stream_interactor) { this.stream_interactor = stream_interactor; } public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { bool is_mam_message = Xep.MessageArchiveManagement.MessageFlag.get_flag(stanza) != null; XmppStream? stream = stream_interactor.get_stream(conversation.account); Xep.MessageArchiveManagement.Flag? mam_flag = stream != null ? stream.get_flag(Xep.MessageArchiveManagement.Flag.IDENTITY) : null; if (is_mam_message || (mam_flag != null && mam_flag.cought_up == true)) { conversation.account.mam_earliest_synced = message.local_time; } return false; } } public Entities.Message create_out_message(string text, Conversation conversation) { Entities.Message message = new Entities.Message(text); message.type_ = Util.get_message_type_for_conversation(conversation); message.stanza_id = random_uuid(); message.account = conversation.account; message.body = text; DateTime now = new DateTime.from_unix_utc(new DateTime.now_utc().to_unix()); // Remove milliseconds. They are not stored in the db and might lead to ordering issues when compared with times from the db. message.time = now; message.local_time = now; message.direction = Entities.Message.DIRECTION_SENT; message.counterpart = conversation.counterpart; if (conversation.type_ in new Conversation.Type[]{Conversation.Type.GROUPCHAT, Conversation.Type.GROUPCHAT_PM}) { message.ourpart = stream_interactor.get_module(MucManager.IDENTITY).get_own_jid(conversation.counterpart, conversation.account) ?? conversation.account.bare_jid; message.real_jid = conversation.account.bare_jid; } else { message.ourpart = conversation.account.bare_jid.with_resource(conversation.account.resourcepart); } message.marked = Entities.Message.Marked.UNSENT; message.encryption = conversation.encryption; return message; } public void send_xmpp_message(Entities.Message message, Conversation conversation, bool delayed = false) { lock (lock_send_unsent) { XmppStream stream = stream_interactor.get_stream(conversation.account); message.marked = Entities.Message.Marked.NONE; if (stream != null) { Xmpp.MessageStanza new_message = new Xmpp.MessageStanza(message.stanza_id); new_message.to = message.counterpart; new_message.body = message.body; if (conversation.type_ == Conversation.Type.GROUPCHAT) { new_message.type_ = Xmpp.MessageStanza.TYPE_GROUPCHAT; } else { new_message.type_ = Xmpp.MessageStanza.TYPE_CHAT; } build_message_stanza(message, new_message, conversation); pre_message_send(message, new_message, conversation); if (message.marked == Entities.Message.Marked.UNSENT || message.marked == Entities.Message.Marked.WONTSEND) return; if (delayed) { Xmpp.Xep.DelayedDelivery.Module.set_message_delay(new_message, message.time); } // Set an origin ID if a MUC doen't guarantee to keep IDs if (conversation.type_ == Conversation.Type.GROUPCHAT) { Xep.Muc.Flag? flag = stream.get_flag(Xep.Muc.Flag.IDENTITY); if (flag == null) return; if(!flag.has_room_feature(conversation.counterpart, Xep.Muc.Feature.STABLE_ID)) { Xep.UniqueStableStanzaIDs.set_origin_id(new_message, message.stanza_id); } } stream.get_module(Xmpp.MessageModule.IDENTITY).send_message(stream, new_message); } else { message.marked = Entities.Message.Marked.UNSENT; } } } } public abstract class MessageListener : Xmpp.OrderedListener { public abstract async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation); } public class MessageListenerHolder : Xmpp.ListenerHolder { public async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { foreach (OrderedListener ol in listeners) { MessageListener l = ol as MessageListener; bool stop = yield l.run(message, stanza, conversation); if (stop) return true; } return false; } } }