Created conversation route

lib/helpers/conversations_helper.dart

@@ -1,4 +1,5 @@
 import 'package:comunic/helpers/database/conversations_database_helper.dart';
+import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/conversations_list.dart';
 import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/api_request.dart';
@@ -22,15 +23,7 @@ class ConversationsHelper {
 
     try {
       ConversationsList list = ConversationsList();
-      response.getArray().forEach((f) => list.add(Conversation(
-            id: f["ID"],
-            ownerID: f["ID_owner"],
-            lastActive: f["last_active"],
-            name: f["name"] == false ? null : f["name"],
-            following: f["following"] == 1,
-            sawLastMessage: f["saw_last_message"] == 1,
-            members: f["members"].map<int>((f) => int.parse(f)).toList(),
-          )));
+      response.getArray().forEach((f) => list.add(_apiToConversation(f)));
 
       // Update the database
       await _conversationsDatabaseHelper.clearTable();
@@ -50,8 +43,38 @@ class ConversationsHelper {
     return list;
   }
 
-  /// Get the name of a [conversation]. This requires information about the
-  /// users of this conversation
+  /// Get information about a single conversation specified by its [id]
+  Future<Conversation> _downloadSingle(int id) async {
+    try {
+      final response = await APIRequest(
+          uri: "conversations/getInfoOne",
+          needLogin: true,
+          args: {"conversationID": id.toString()}).exec();
+
+      if (response.code != 200) return null;
+
+      final conversation = _apiToConversation(response.getObject());
+      _conversationsDatabaseHelper.insertOrUpdate(conversation);
+      return conversation;
+    } on Exception catch (e) {
+      print(e.toString());
+      print("Could not get information about a single conversation !");
+      return null;
+    }
+  }
+
+  /// Get information about a single conversation. If [force] is set to false,
+  /// cached version of the conversation will be used, else it will always get
+  /// the information from the server
+  Future<Conversation> getSingle(int id, {bool force = false}) async {
+    if(force || ! await _conversationsDatabaseHelper.has(id))
+      return await _downloadSingle(id);
+    else
+      return _conversationsDatabaseHelper.get(id);
+  }
+
+  /// Get the name of a [conversation]. This requires information
+  /// about the users of this conversation
   static String getConversationName(
       Conversation conversation, UsersList users) {
     if (conversation.has_name) return conversation.name;
@@ -69,4 +92,35 @@ class ConversationsHelper {
 
     return name;
   }
+
+  /// Asynchronously get the name fo the conversation
+  ///
+  /// Unlike the synchronous method, this method does not need information
+  /// about the members of the conversation
+  ///
+  /// Returns null in case of failure
+  static Future<String> getConversationNameAsync(
+      Conversation conversation) async {
+    if (conversation.has_name) return conversation.name;
+
+    //Get information about the members of the conversation
+    final members = await UsersHelper().getUsersInfo(conversation.members);
+
+    if (members == null) return null;
+
+    return ConversationsHelper.getConversationName(conversation, members);
+  }
+
+  /// Turn an API entry into a [Conversation] object
+  Conversation _apiToConversation(Map<String, dynamic> map){
+    return Conversation(
+      id: map["ID"],
+      ownerID: map["ID_owner"],
+      lastActive: map["last_active"],
+      name: map["name"] == false ? null : map["name"],
+      following: map["following"] == 1,
+      sawLastMessage: map["saw_last_message"] == 1,
+      members: map["members"].map<int>((f) => int.parse(f)).toList(),
+    );
+  }
 }

lib/models/conversation.dart

@@ -40,7 +40,7 @@ class Conversation extends CacheModel implements Comparable {
         name = map[ConversationTableContract.C_NAME],
         following = map[ConversationTableContract.C_FOLLOWING] == 1,
         sawLastMessage = map[ConversationTableContract.C_SAW_LAST_MESSAGE] == 1,
-        members = stringListToIntList(
+        members = listToIntList(
             map[ConversationTableContract.C_MEMBERS].split(",")),
         super.fromMap(map);
 

lib/ui/routes/conversation_route.dart

@@ -0,0 +1,90 @@
+import 'package:comunic/helpers/conversations_helper.dart';
+import 'package:comunic/models/conversation.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Single conversation route
+///
+/// @author Pierre HUBERT
+
+class ConversationRoute extends StatefulWidget {
+  final int conversationID;
+
+  const ConversationRoute({
+    Key key,
+    @required this.conversationID,
+  })  : assert(conversationID != null),
+        super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => _ConversationRouteState();
+}
+
+class _ConversationRouteState extends State<ConversationRoute> {
+  final ConversationsHelper _conversationsHelper = ConversationsHelper();
+  Conversation _conversation;
+  String _conversationName;
+  bool _error = false;
+
+  setError(bool err) => setState(() => _error = err);
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    _loadConversation();
+  }
+
+  Future<void> _loadConversation() async {
+    setError(false);
+
+    _conversation =
+        await _conversationsHelper.getSingle(widget.conversationID);
+
+    if (_conversation == null) return setError(true);
+
+    final conversationName =
+        await ConversationsHelper.getConversationNameAsync(_conversation);
+
+    if(conversationName == null)
+      return setError(true);
+
+    setState(() {
+      _conversationName = conversationName;
+    });
+  }
+
+  Widget _buildRouteBody() {
+    //Handle errors
+    if (_error != null && _error)
+      return buildErrorCard(
+        tr("Could not get conversation information!"),
+        actions: <Widget>[
+          FlatButton(
+            onPressed: _loadConversation,
+            child: Text(
+              tr("Try again").toUpperCase(),
+              style: TextStyle(
+                color: Colors.white,
+              ),
+            ),
+          ),
+        ],
+      );
+
+    //if (_conversationName == null || _conversation == null)
+      return buildCenteredProgressBar();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(
+          _conversationName == null ? tr("Loading") : _conversationName,
+        ),
+      ),
+      body: _buildRouteBody(),
+    );
+  }
+}

lib/ui/routes/home_route.dart

@@ -1,4 +1,4 @@
-import 'package:comunic/ui/screens/conversations_screen.dart';
+import 'package:comunic/ui/screens/conversations_list_screen.dart';
 import 'package:comunic/ui/screens/menus_screen.dart';
 import 'package:comunic/ui/tiles/custom_bottom_navigation_bar_item.dart';
 import 'package:flutter/material.dart';
@@ -49,7 +49,7 @@ class _HomeRouteState extends State<HomeRoute> {
   Widget _buildBody(BuildContext context) {
     switch (_currTab) {
       case 0:
-        return ConversationsScreen();
+        return ConversationsListScreen();
 
       case 1:
         return MenuScreen();

lib/ui/screens/conversations_list_screen.dart

@@ -2,6 +2,7 @@ import 'package:comunic/enums/load_error_level.dart';
 import 'package:comunic/helpers/conversations_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/conversations_list.dart';
+import 'package:comunic/ui/routes/conversation_route.dart';
 import 'package:comunic/ui/tiles/conversation_tile.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
@@ -11,12 +12,12 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre HUBERT
 
-class ConversationsScreen extends StatefulWidget {
+class ConversationsListScreen extends StatefulWidget {
   @override
   State<StatefulWidget> createState() => _ConversationScreenState();
 }
 
-class _ConversationScreenState extends State<ConversationsScreen> {
+class _ConversationScreenState extends State<ConversationsListScreen> {
   final ConversationsHelper _conversationsHelper = ConversationsHelper();
   final UsersHelper _usersHelper = UsersHelper();
   ConversationsList _list;
@@ -88,6 +89,13 @@ class _ConversationScreenState extends State<ConversationsScreen> {
     );
   }
 
+  /// Open a conversation
+  void _openConversation(BuildContext context, int conversationId){
+    Navigator.of(context).push(MaterialPageRoute(builder: (c){
+      return ConversationRoute(conversationID: conversationId,);
+    }));
+  }
+
   @override
   Widget build(BuildContext context) {
     if (_error == LoadErrorLevel.MAJOR) return _buildErrorCard();
@@ -103,10 +111,12 @@ class _ConversationScreenState extends State<ConversationsScreen> {
             ),
             Expanded(
               child: ListView.builder(
+                controller: ScrollController(),
                 itemBuilder: (context, index) {
                   return ConversationTile(
                     conversation: _list.elementAt(index),
                     usersList: _list.users,
+                    onOpen: (c){_openConversation(context, c.id);},
                   );
                 },
                 itemCount: _list.length,

lib/ui/tiles/conversation_tile.dart

@@ -9,14 +9,21 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre HUBERT
 
+typedef OpenConversationCallback = void Function(Conversation);
+
 class ConversationTile extends StatelessWidget {
   final Conversation conversation;
   final UsersList usersList;
+  final OpenConversationCallback onOpen;
 
   const ConversationTile(
-      {Key key, @required this.conversation, @required this.usersList})
+      {Key key,
+      @required this.conversation,
+      @required this.usersList,
+      @required this.onOpen})
       : assert(conversation != null),
         assert(usersList != null),
+        assert(onOpen != null),
         super(key: key);
 
   _buildSubInformation(IconData icon, String content) {
@@ -35,6 +42,7 @@ class ConversationTile extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ListTile(
+      onTap: () => onOpen(conversation),
       // Conversation name
       title: Text(
         ConversationsHelper.getConversationName(

lib/utils/list_utils.dart

@@ -2,8 +2,8 @@
 ///
 /// @author Pierre HUBERT
 
-/// Transform a list of string into something else
-List<int> stringListToIntList(List<String> srcList){
+/// Transform a list of dynamic thins into something a list of ints
+List<int> listToIntList(List<dynamic> srcList){
   List<int> list = List();
 
   srcList.forEach((e){