xmpp: RECEIVE MESSAGES!

lib/db/conversation.dart

@@ -3,7 +3,7 @@ import "package:moxxyv2/isar.g.dart";
 
 @Collection()
 @Name("Conversation")
-class Conversation {
+class DBConversation {
   int? id;
 
   @Index(caseSensitive: false)

lib/db/message.dart

@@ -0,0 +1,17 @@
+import "package:isar/isar.dart";
+import "package:moxxyv2/isar.g.dart";
+
+@Collection()
+@Name("Message")
+class DBMessage {
+  int? id;
+
+  @Index(caseSensitive: false)
+  late String from;
+
+  late int timestamp;
+
+  late String body;
+
+  late bool sent;
+}

lib/helpers.dart

@@ -21,10 +21,18 @@ String padInt(int i) {
  * returned true.
  */
 bool listContains<T>(List<T> list, bool Function(T element) test) {
+  return firstWhereOrNull<T>(list, test) != null;
+}
+
+/*
+ * A wrapper around List<T>.firstWhere that does not throw but instead just
+ * return null if test never returned true
+ */
+T? firstWhereOrNull<T>(List<T> list, bool Function(T element) test) {
   try {
-    return list.firstWhere(test) != null;
+    return list.firstWhere(test);
   } catch(e) {
-    return false;
+    return null;
   }
 }
 

lib/models/message.dart

@@ -3,15 +3,17 @@ class Message {
   final int timestamp; // NOTE: Milliseconds since Epoch
   final String from;
   final bool sent;
+  final int id; // Database ID
 
-  const Message({ required this.from, required this.body, required this.timestamp, required this.sent });
+  const Message({ required this.from, required this.body, required this.timestamp, required this.sent, required this.id });
 
   Message copyWith({ String? from, String? body, int? timestamp }) {
     return Message(
       from: from ?? this.from,
       body: body ?? this.body,
       timestamp: timestamp ?? this.timestamp,
-      sent: this.sent
+      sent: this.sent,
+      id: this.id
     );
   }
 }

lib/redux/conversation/actions.dart

@@ -1,3 +1,6 @@
+import "package:moxxyv2/models/message.dart";
+import "package:moxxyv2/xmpp/jid.dart";
+
 class SetShowSendButtonAction {
   final bool show;
 
@@ -20,6 +23,21 @@ class SendMessageAction {
   SendMessageAction({ required this.from, required this.body, required this.timestamp, required this.jid, required this.cid });
 }
 
+class ReceiveMessageAction {
+  final String body;
+  final int timestamp;
+  final FullJID from;
+  final String jid;
+
+  ReceiveMessageAction({ required this.from, required this.body, required this.timestamp, required this.jid });
+}
+
+class AddMessageAction {
+  final Message message;
+
+  AddMessageAction({ required this.message });
+}
+
 class CloseConversationAction {
   final String jid;
   final int id;

lib/redux/conversation/reducers.dart

@@ -5,24 +5,14 @@ import "package:moxxyv2/redux/conversation/state.dart";
 import "package:moxxyv2/redux/conversation/actions.dart";
 
 HashMap<String, List<Message>> messageReducer(HashMap<String, List<Message>> state, dynamic action) {
-  if (action is SendMessageAction) {
-    HashMap<String, List<Message>> map = HashMap<String, List<Message>>()..addAll(state);
-
-    Message msg = Message(
-      from: action.from,
-      body: action.body,
-      timestamp: action.timestamp,
-      sent: true
-    );
-    
-    String jid = action.jid;
-    if (!map.containsKey(jid)) {
-      map[jid] = [ msg ];
-      return map;
+  if (action is AddMessageAction) {
+    if (!state.containsKey(action.message.from)) {
+      state[action.message.from] = List.from([ action.message ]);
+    } else {
+      state[action.message.from] = state[action.message.from]!..add(action.message);
     }
 
-    map[jid]!.add(msg);
-    return map;
+    return state;
   }
 
   return state;

lib/redux/conversations/actions.dart

@@ -1,16 +1,13 @@
-import "dart:collection";
+import "package:moxxyv2/models/conversation.dart";
 
 class AddConversationAction {
-  final String title;
-  final String lastMessageBody;
-  final String avatarUrl;
-  final String jid;
-  final int id;
-  final int unreadCounter;
-  final List<String> sharedMediaPaths;
-  final int lastChangeTimestamp;
-  final bool triggeredByDatabase;
-  final bool open;
+  Conversation conversation;
 
-  AddConversationAction({ required this.title, required this.lastMessageBody, required this.avatarUrl, required this.jid, required this.sharedMediaPaths, required this.lastChangeTimestamp, required this.id, this.unreadCounter = 0, this.triggeredByDatabase = false, required this.open });
+  AddConversationAction({ required this.conversation });
+}
+
+class UpdateConversationAction {
+  Conversation conversation;
+
+  UpdateConversationAction({ required this.conversation });
 }

lib/redux/conversations/middlewares.dart

@@ -2,29 +2,13 @@ import "package:moxxyv2/redux/state.dart";
 import "package:moxxyv2/redux/conversations/actions.dart";
 import "package:moxxyv2/redux/conversation/actions.dart";
 import "package:moxxyv2/repositories/conversation.dart";
+import "package:moxxyv2/models/conversation.dart";
 
 import "package:redux/redux.dart";
 import "package:flutter_redux_navigation/flutter_redux_navigation.dart";
 import "package:get_it/get_it.dart";
 
-void conversationsMiddleware(Store<MoxxyState> store, action, NextDispatcher next) {
-  var repo = GetIt.I.get<DatabaseRepository>();
-
-  if (action is AddConversationAction && !action.triggeredByDatabase) {
-    if (repo.hasConversation(action.id)) {
-      // TODO
-    } else {
-      repo.addConversationFromAction(action);
-    }
-  } else if (action is SendMessageAction) {
-    if (repo.hasConversation(action.cid)) {
-      repo.updateConversation(id: action.cid, lastMessageBody: action.body, lastChangeTimestamp: action.timestamp);
-    } else {
-      // TODO
-    }
-  } else if (action is CloseConversationAction) {
-    store.dispatch(NavigateToAction.replace("/conversations"));
-  }
-
+void conversationsMiddleware(Store<MoxxyState> store, action, NextDispatcher next) async {
+  
   next(action);
 }

lib/redux/conversations/reducers.dart

@@ -5,30 +5,16 @@ import "package:moxxyv2/redux/conversation/actions.dart";
 
 List<Conversation> conversationReducer(List<Conversation> state, dynamic action) {
   if (action is AddConversationAction) {
-    state.add(Conversation(
-        title: action.title,
-        lastMessageBody: action.lastMessageBody,
-        avatarUrl: action.avatarUrl,
-        jid: action.jid,
-        // TODO: Correct?
-        unreadCounter: 0,
-        sharedMediaPaths: action.sharedMediaPaths,
-        lastChangeTimestamp: action.lastChangeTimestamp,
-        open: action.open,
-        id: action.id
-    ));
-  } else if (action is SendMessageAction) {
-    return state.map((element) {
-        if (element.jid == action.jid) {
-          return element.copyWith(lastMessageBody: action.body, lastChangeTimestamp: action.timestamp);
+    return state..add(action.conversation);
+  } else if (action is UpdateConversationAction) {
+    return state.map((c) {
+        if (c.id == action.conversation.id) {
+          return action.conversation;
         }
 
-        return element;
+        return c;
     }).toList();
-  } else if (action is CloseConversationAction) {
-    // TODO: Yikes.
-    return state.map((element) => element.jid == action.jid ? element.copyWith(open: false) : element).toList().where((element) => element.open).toList();
   }
-
+  
   return state;
 }

lib/redux/messages/actions.dart

@@ -0,0 +1,5 @@
+class LoadMessagesAction {
+  final String jid;
+
+  LoadMessagesAction({ required this.jid });
+}

lib/redux/messages/middleware.dart

@@ -0,0 +1,65 @@
+import "package:moxxyv2/redux/state.dart";
+import "package:moxxyv2/redux/conversations/actions.dart";
+import "package:moxxyv2/redux/conversation/actions.dart";
+import "package:moxxyv2/repositories/conversation.dart";
+import "package:moxxyv2/models/conversation.dart";
+import "package:moxxyv2/models/message.dart";
+import "package:moxxyv2/redux/messages/actions.dart";
+import "package:moxxyv2/helpers.dart";
+
+import "package:redux/redux.dart";
+import "package:flutter_redux_navigation/flutter_redux_navigation.dart";
+import "package:get_it/get_it.dart";
+
+void messageMiddleware(Store<MoxxyState> store, action, NextDispatcher next) async {
+  if (action is ReceiveMessageAction) {
+    // TODO: Check if the conversation already exists
+    final repo = GetIt.I.get<DatabaseRepository>();
+    final now = DateTime.now().millisecondsSinceEpoch;
+    final bareJidString = action.from.toBare().toString();
+    
+    final message = await repo.addMessageFromData(
+      action.body,
+      now,
+      bareJidString,
+      false
+    );
+
+    final existantConversation = firstWhereOrNull(store.state.conversations, (Conversation c) => c.jid == bareJidString);
+    if (existantConversation == null) {
+      final conversation = await repo.addConversationFromData(
+        action.from.local,
+        action.body,
+        "",
+        bareJidString,
+        1,
+        now,
+        [],
+        true
+      );
+
+      repo.loadedConversations.add(bareJidString);
+      store.dispatch(AddConversationAction(conversation: conversation));
+    } else {
+      await repo.updateConversation(
+        id: existantConversation.id,
+        lastMessageBody: action.body,
+        lastChangeTimestamp: now,
+        unreadCounter: existantConversation.unreadCounter + 1
+      );
+      store.dispatch(UpdateConversationAction(
+          conversation: existantConversation.copyWith(
+            lastMessageBody: action.body,
+            lastChangeTimestamp: now,
+            unreadCounter: existantConversation.unreadCounter + 1
+          )
+      ));
+    }
+
+    store.dispatch(AddMessageAction(message: message));
+  } else if (action is LoadMessagesAction) {
+    GetIt.I.get<DatabaseRepository>().loadMessagesForJid(action.jid);
+  }
+  
+  next(action);
+}

lib/repositories/conversation.dart

@@ -1,9 +1,12 @@
 import "dart:collection";
 
-import "package:moxxyv2/db/conversation.dart" as db;
-import "package:moxxyv2/models/conversation.dart" as model;
+import "package:moxxyv2/db/conversation.dart";
+import "package:moxxyv2/db/message.dart";
+import "package:moxxyv2/models/conversation.dart";
+import "package:moxxyv2/models/message.dart";
 import "package:moxxyv2/redux/state.dart";
 import "package:moxxyv2/redux/conversations/actions.dart";
+import "package:moxxyv2/redux/conversation/actions.dart";
 
 import "package:isar/isar.dart";
 import "package:redux/redux.dart";
@@ -16,16 +19,18 @@ class DatabaseRepository {
   final Isar isar;
   final Store<MoxxyState> store;
 
-  final HashMap<int, db.Conversation> _cache = HashMap();
+  final HashMap<int, DBConversation> _cache = HashMap();
+  final List<String> loadedConversations = List.empty(growable: true);
   
   DatabaseRepository({ required this.isar, required this.store });
-
+ 
   Future<void> loadConversations() async {
-    var conversations = await this.isar.conversations.where().findAll();
-
+    var conversations = await this.isar.dBConversations.where().findAll();
+    
     conversations.forEach((c) {
         this._cache[c.id!] = c;
         this.store.dispatch(AddConversationAction(
+            conversation: Conversation(
             id: c.id!,
             title: c.title,
             jid: c.jid,
@@ -34,19 +39,32 @@ class DatabaseRepository {
             unreadCounter: c.unreadCounter,
             lastChangeTimestamp: c.lastChangeTimestamp,
             sharedMediaPaths: [],
-            open: c.open,
-            triggeredByDatabase: true
+            open: c.open
+          )
         ));
       }
     );
   }
 
+  Future<void> loadMessagesForJid(String jid) async {
+    final messages = await this.isar.dBMessages.where().fromEqualTo(jid).findAll();
+    this.loadedConversations.add(jid);
+
+    messages.forEach((m) => this.store.dispatch(AddMessageAction(message: Message(
+            from: m.from,
+            body: m.body,
+            timestamp: m.timestamp,
+            sent: m.sent,
+            id: m.id!
+    ))));
+  }
+  
   // TODO
   bool hasConversation(int id) {
     return this._cache.containsKey(id);
   }
 
-  Future<void> updateConversation({ required int id, String? lastMessageBody, int? lastChangeTimestamp, bool? open }) async {
+  Future<void> updateConversation({ required int id, String? lastMessageBody, int? lastChangeTimestamp, bool? open, int? unreadCounter }) async {
     print("updateConversation");
 
     final c = this._cache[id]!;
@@ -59,40 +77,64 @@ class DatabaseRepository {
     if (open != null) {
       c.open = open;
     }
+    if (unreadCounter != null) {
+      c.unreadCounter = unreadCounter;
+    }
 
     await this.isar.writeTxn((isar) async {
-        await isar.conversations.put(c);
+        await isar.dBConversations.put(c);
         print("DONE");
     });
   }
-  
-  Future<void> addConversationFromAction(AddConversationAction action) async {
-    print("addConversationFromACtion");
-    final c = db.Conversation()
-      ..jid = action.jid
-      ..title = action.title
-      ..avatarUrl = action.avatarUrl
-      ..lastChangeTimestamp = action.lastChangeTimestamp
-      ..unreadCounter = action.unreadCounter
-      ..lastMessageBody = action.lastMessageBody
-      ..open = action.open;
+
+  Future<Conversation> addConversationFromData(String title, String lastMessageBody, String avatarUrl, String jid, int unreadCounter, int lastChangeTimestamp, List<String> sharedMediaPaths, bool open) async {
+    print("addConversationFromAction");
+    final c = DBConversation()
+      ..jid = jid
+      ..title = title
+      ..avatarUrl = avatarUrl
+      ..lastChangeTimestamp = lastChangeTimestamp
+      ..unreadCounter = unreadCounter
+      ..lastMessageBody = lastMessageBody
+      ..open = open;
     await this.isar.writeTxn((isar) async {
-        await isar.conversations.put(c);
+        await isar.dBConversations.put(c);
         print("DONE");
     });
+    this._cache[c.id!] = c;
+
+    return Conversation(
+      title: title,
+      lastMessageBody: lastMessageBody,
+      avatarUrl: avatarUrl,
+      jid: jid,
+      id: c.id!,
+      unreadCounter: unreadCounter,
+      lastChangeTimestamp: lastChangeTimestamp,
+      sharedMediaPaths: sharedMediaPaths,
+      open: open
+    );
   }
-  
-  Future<void> addConversation(model.Conversation conversation) async {
-    final c = db.Conversation()
-      ..jid = conversation.jid
-      ..title = conversation.title
-      ..avatarUrl = conversation.avatarUrl
-      ..lastChangeTimestamp = conversation.lastChangeTimestamp
-      ..unreadCounter = conversation.unreadCounter
-      ..lastMessageBody = conversation.lastMessageBody
-      ..open = conversation.open;
+
+  Future<Message> addMessageFromData(String body, int timestamp, String from, bool sent) async {
+    print("addMessageFromData");
+    final m = DBMessage()
+      ..from = from
+      ..timestamp = timestamp
+      ..body = body
+      ..sent = sent;
+      
     await this.isar.writeTxn((isar) async {
-        await isar.conversations.put(c);
+        await isar.dBMessages.put(m);
+        print("DONE");
     });
+
+    return Message(
+      body: body,
+      from: from,
+      timestamp: timestamp,
+      sent: sent,
+      id: m.id!
+    );
   }
 }

lib/ui/pages/conversation/conversation.dart

@@ -13,10 +13,13 @@ import "package:moxxyv2/ui/pages/profile/profile.dart";
 import "package:moxxyv2/ui/pages/conversation/arguments.dart";
 import "package:moxxyv2/ui/constants.dart";
 import "package:moxxyv2/ui/helpers.dart";
+import "package:moxxyv2/repositories/conversation.dart";
+import "package:moxxyv2/redux/messages/actions.dart";
 
 import "package:flutter_speed_dial/flutter_speed_dial.dart";
 import "package:flutter_redux/flutter_redux.dart";
 import "package:redux/redux.dart";
+import "package:get_it/get_it.dart";
 
 typedef SendMessageFunction = void Function(String body);
 
@@ -50,8 +53,9 @@ class _MessageListViewModel {
   final void Function(bool scrollToEndButton) setShowScrollToEndButton;
   final bool showScrollToEndButton;
   final void Function() closeChat;
-  
-  _MessageListViewModel({ required this.conversation, required this.showSendButton, required this.sendMessage, required this.setShowSendButton, required this.showScrollToEndButton, required this.setShowScrollToEndButton, required this.closeChat });
+  final void Function(String) loadMessages;
+ 
+  _MessageListViewModel({ required this.conversation, required this.showSendButton, required this.sendMessage, required this.setShowSendButton, required this.showScrollToEndButton, required this.setShowScrollToEndButton, required this.closeChat, required this.loadMessages });
 }
 
 class _ListViewWrapperViewModel {
@@ -182,6 +186,7 @@ class ConversationPage extends StatelessWidget {
               jid: jid,
               id: conversation.id
           )),
+          loadMessages: (jid) => store.dispatch(LoadMessagesAction(jid: jid)),
           sendMessage: (body) => store.dispatch(
             // TODO
             SendMessageAction(
@@ -195,6 +200,11 @@ class ConversationPage extends StatelessWidget {
         );
       },
       builder: (context, viewModel) {
+        // TODO: Handle this in a middleware
+        if (GetIt.I.get<DatabaseRepository>().loadedConversations.indexOf(jid) == -1) {
+          viewModel.loadMessages(jid);
+        }
+
         return Scaffold(
           appBar: BorderlessTopbar.avatarAndName(
             avatar: AvatarWrapper(

lib/xmpp/events.dart

@@ -1,8 +1,10 @@
+import "package:moxxyv2/xmpp/jid.dart";
+
 abstract class XmppEvent {}
 
 class MessageEvent extends XmppEvent {
   final String body;
-  final String fromJid;
+  final FullJID fromJid;
   final String sid;
 
   MessageEvent({ required this.body, required this.fromJid, required this.sid });

lib/xmpp/jid.dart

@@ -30,7 +30,17 @@ class BareJID extends JID {
 
 class FullJID extends JID {
   FullJID({ required String local, required String domain, required String resource }) : super(local: local, domain: domain, resource: resource);
+  
+  BareJID toBare() {
+    return BareJID(local: this.local, domain: this.domain);
+  }
 
+  static FullJID fromString(String fullJid) {
+    final jidParts = fullJid.split("@");
+    final other = jidParts[1].split("/");
+    return FullJID(local: jidParts[0], domain: other[0], resource: other[1]);
+  }
+  
   String toString() {
     return "${this.local}@${this.domain}/${this.resource}";
   }

lib/xmpp/message.dart

@@ -1,6 +1,7 @@
 import "package:moxxyv2/xmpp/stanzas/stanza.dart";
 import "package:moxxyv2/xmpp/connection.dart";
 import "package:moxxyv2/xmpp/events.dart";
+import "package:moxxyv2/xmpp/jid.dart";
 
 bool handleMessageStanza(XmppConnection conn, Stanza stanza) {
   final body = stanza.firstTag("body");
@@ -8,7 +9,7 @@ bool handleMessageStanza(XmppConnection conn, Stanza stanza) {
   
   conn.sendEvent(MessageEvent(
       body: body.innerText(),
-      fromJid: stanza.attributes["from"]!,
+      fromJid: FullJID.fromString(stanza.attributes["from"]!),
       sid: stanza.attributes["id"]!
   ));
 

test/helpers_test.dart

@@ -18,12 +18,12 @@ void main() {
       });
   });
 
-  group("listContains", () {
+  group("firstWhereOrNull", () {
       test("[] should not contain 1", () {
-          expect(listContains<int>([], (int element) => element == 1), false);
+          expect(firstWhereOrNull<int>([], (int element) => element == 1), null);
       });
       test("[1, 2, 3] should contain 2", () {
-          expect(listContains([ 1, 2, 3 ], (int element) => element == 2), true);
+          expect(firstWhereOrNull([ 1, 2, 3 ], (int element) => element == 2), 2);
       });
   });