Send message

lib/helpers/conversations_helper.dart

@@ -6,12 +6,15 @@ import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/api_request.dart';
 import 'package:comunic/models/conversation.dart';
 import 'package:comunic/models/conversation_message.dart';
+import 'package:comunic/models/new_conversation_message.dart';
 import 'package:comunic/utils/account_utils.dart';
 
 /// Conversation helper
 ///
 /// @author Pierre HUBERT
 
+enum SendMessageResult { SUCCESS, MESSAGE_REJECTED, FAILED }
+
 class ConversationsHelper {
   final ConversationsDatabaseHelper _conversationsDatabaseHelper =
       ConversationsDatabaseHelper();
@@ -156,4 +159,23 @@ class ConversationsHelper {
 
     return list;
   }
+
+  /// Send a new message to the server
+  Future<SendMessageResult> sendMessage(NewConversationMessage message) async {
+    final response = await APIRequest(
+      uri: "conversations/sendMessage",
+      needLogin: true,
+      args: {
+        "conversationID": message.conversationID.toString(),
+        "message": message.message
+      },
+    ).exec();
+
+    if(response.code == 401)
+      return SendMessageResult.MESSAGE_REJECTED;
+    else if(response.code != 200)
+      return SendMessageResult.FAILED;
+
+    return SendMessageResult.SUCCESS;
+  }
 }

lib/models/new_conversation_message.dart

@@ -0,0 +1,17 @@
+import 'package:meta/meta.dart';
+
+/// New conversation message model
+///
+/// This model is used to transfer a conversation message to send in the application
+///
+/// @author Pierre HUBERT
+
+class NewConversationMessage {
+  final int conversationID;
+  final String message;
+
+  NewConversationMessage({
+    @required this.conversationID,
+    @required this.message,
+  }) : assert(conversationID != null);
+}

lib/ui/screens/conversation_screen.dart

@@ -2,6 +2,7 @@ import 'package:comunic/helpers/conversations_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/conversation_messages_list.dart';
 import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/models/new_conversation_message.dart';
 import 'package:comunic/ui/tiles/conversation_message_tile.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/list_utils.dart';
@@ -26,11 +27,17 @@ class ConversationScreen extends StatefulWidget {
 }
 
 class _ConversationScreenState extends State<ConversationScreen> {
+  //Helpers
   final ConversationsHelper _conversationsHelper = ConversationsHelper();
   final UsersHelper _usersHelper = UsersHelper();
+
+  // Class members
   ConversationMessagesList _messages;
   UsersList _usersInfo = UsersList();
   ErrorLevel _error = ErrorLevel.NONE;
+  bool _isMessageValid = false;
+  bool _isSendingMessage = false;
+  TextEditingController _textEditingController = TextEditingController();
 
   @override
   void didChangeDependencies() {
@@ -40,6 +47,8 @@ class _ConversationScreenState extends State<ConversationScreen> {
 
   void _setError(ErrorLevel err) => setState(() => _error = err);
 
+  void _setSending(bool sending) => setState(() => _isSendingMessage = sending);
+
   /// Method called when an error occurred while loading messages
   void _errorLoading() {
     _setError(_messages == null ? ErrorLevel.MAJOR : ErrorLevel.MINOR);
@@ -68,6 +77,41 @@ class _ConversationScreenState extends State<ConversationScreen> {
         _messages = messages;
       else
         _messages.addAll(messages);
+
+      _messages.sort();
+    });
+  }
+
+  /// Send a new message
+  Future<void> _submitMessage(BuildContext context, String content) async {
+    //Send the message
+    _setSending(true);
+    final result = await _conversationsHelper.sendMessage(
+        NewConversationMessage(
+            conversationID: widget.conversationID, message: content));
+    _setSending(false);
+
+    //Check the result of the operation
+    if (result == SendMessageResult.SUCCESS)
+      _clearSendMessageForm();
+    else
+      Scaffold.of(context).showSnackBar(
+        SnackBar(
+          content: Text(
+            result == SendMessageResult.MESSAGE_REJECTED
+                ? tr("Message rejected by the server!")
+                : tr("Could not send message!"),
+          ),
+          duration: Duration(milliseconds: 500),
+        ),
+      );
+  }
+
+  /// Clear send message form
+  void _clearSendMessageForm() {
+    setState(() {
+      _textEditingController = TextEditingController();
+      _isMessageValid = false;
     });
   }
 
@@ -76,19 +120,85 @@ class _ConversationScreenState extends State<ConversationScreen> {
     return buildErrorCard(tr("Could not load the list of messages!"));
   }
 
+  /// Messages list
+  Widget _buildMessagesList() {
+    return Expanded(
+      child: ListView.builder(
+          itemCount: _messages.length,
+          itemBuilder: (c, i) {
+            return ConversationMessageTile(
+              message: _messages.elementAt(i),
+              userInfo: _usersInfo.getUser(_messages[i].userID),
+            );
+          }),
+    );
+  }
+
+  /// Send message from
+  Widget _buildSendMessageForm() {
+    return new Container(
+      margin: const EdgeInsets.symmetric(horizontal: 8.0),
+      child: new Row(
+        children: <Widget>[
+          // Image area
+          /*new Container(
+              margin: new EdgeInsets.symmetric(horizontal: 4.0),
+              child: new IconButton(
+                  icon: new Icon(
+                    Icons.photo_camera,
+                    color: Theme.of(context).accentColor,
+                  ),
+                  onPressed: () async {}),
+            ),*/
+
+          // Message area
+          new Flexible(
+            child: new TextField(
+              controller: _textEditingController,
+              onChanged: (String messageText) {
+                setState(() {
+                  _isMessageValid = messageText.length > 4;
+                });
+              },
+              onSubmitted:
+                  _isMessageValid ? (s) => _submitMessage(context, s) : null,
+              decoration:
+                  new InputDecoration.collapsed(hintText: tr("Send a message")),
+            ),
+          ),
+
+          // Send button
+          new Container(
+            margin: const EdgeInsets.symmetric(horizontal: 4.0),
+            child: new IconButton(
+              icon: new Icon(
+                Icons.send,
+                color: !_isSendingMessage && _isMessageValid
+                    ? Theme.of(context).accentColor
+                    : Theme.of(context).disabledColor,
+              ),
+              onPressed: !_isSendingMessage && _isMessageValid
+                  ? () => _submitMessage(context, _textEditingController.text)
+                  : null,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     if (_error == ErrorLevel.MAJOR) return _buildError();
 
     if (_messages == null) return buildCenteredProgressBar();
 
-    return ListView.builder(
-        itemCount: _messages.length,
-        itemBuilder: (c, i) {
-          return ConversationMessageTile(
-            message: _messages.elementAt(i),
-            userInfo: _usersInfo.getUser(_messages[i].userID),
-          );
-        });
+    return Column(
+      children: <Widget>[
+        _buildMessagesList(),
+        Divider(),
+        _buildSendMessageForm()
+      ],
+    );
   }
 }