Bug Fix & Feature

- Fix the breakdown when sending huge files
- Add md5 processing indicator when sending file

lib/chat/cubit/chat_cubit.dart

@@ -1,19 +1,24 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-13 14:03:56
- * @LastEditTime : 2022-10-18 11:25:04
+ * @LastEditTime : 2022-10-18 17:09:55
  * @Description  : 
  */
 
 import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
 
 import 'package:bloc/bloc.dart';
+import 'package:convert/convert.dart';
+import 'package:crypto/crypto.dart';
 import 'package:open_file/open_file.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tcp_client/chat/cubit/chat_state.dart';
 import 'package:tcp_client/chat/model/chat_history.dart';
 import 'package:tcp_client/repositories/common_models/message.dart';
 import 'package:tcp_client/repositories/local_service_repository/local_service_repository.dart';
+import 'package:tcp_client/repositories/local_service_repository/models/local_file.dart';
 import 'package:tcp_client/repositories/tcp_repository/models/tcp_request.dart';
 import 'package:tcp_client/repositories/tcp_repository/models/tcp_response.dart';
 import 'package:tcp_client/repositories/tcp_repository/tcp_repository.dart';
@@ -34,23 +39,63 @@ class ChatCubit extends Cubit<ChatState> {
   final Map<String, StreamSubscription> messageSendSubscriptionMap = {};
   final Map<String, StreamSubscription> fileFetchSubscriptionMap = {};
 
+  
+
   Future<void> addMessage(Message message) async {
+    var msg = message;
+    if(msg.type == MessageType.file) {
+      //wait until md5 is converted
+      //Emit new state
+      var newHistory = ChatHistory(
+        message: msg,
+        type: ChatHistoryType.outcome,
+        status: ChatHistoryStatus.processing
+      );
+      var newHistoryList = [newHistory, ...state.chatHistory];
+      emit(state.copyWith(chatHistory: newHistoryList));
+      var file = msg.payload!.file;
+      var md5Output = AccumulatorSink<Digest>();
+      ByteConversionSink md5Input = md5.startChunkedConversion(md5Output);
+      await for(var bytes in file.openRead()) {
+        md5Input.add(bytes);
+      }
+      md5Input.close();
+      var loadedFile = LocalFile(
+        file: file, 
+        filemd5: md5Output.events.single.toString()
+      );
+      msg = msg.copyWith(
+        payload: loadedFile
+      );
+    }
     //Store locally
-    localServiceRepository.storeMessages([message]);
+    localServiceRepository.storeMessages([msg]);
     //Send to server
     tcpRepository.pushRequest(SendMessageRequest(
-      message: message, 
+      message: msg, 
       token: (await SharedPreferences.getInstance()).getInt('token')
     ));
     //Emit new state
     var newHistory = ChatHistory(
-      message: message,
+      message: msg,
       type: ChatHistoryType.outcome,
       status: ChatHistoryStatus.sending
     );
+    if(msg.type == MessageType.file) {
+      //Remove mock history
+      var newHistoryList = [...state.chatHistory];
+      var index = newHistoryList.indexWhere((element) => element.message.contentmd5 == msg.contentmd5);
+      if(index == -1) {
+        return;
+      }
+      newHistoryList[index] = newHistory;
+      emit(state.copyWith(chatHistory: newHistoryList));
+    }
+    else {
       var newHistoryList = [newHistory, ...state.chatHistory];
       emit(state.copyWith(chatHistory: newHistoryList));
-    _bindSubscriptionForSending(messageMd5: message.contentmd5);
+    }
+    _bindSubscriptionForSending(messageMd5: msg.contentmd5);
   }
 
   Future<void> fetchHistory() async {

lib/chat/model/chat_history.dart

@@ -1,7 +1,7 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-14 14:55:20
- * @LastEditTime : 2022-10-14 15:26:25
+ * @LastEditTime : 2022-10-18 15:19:46
  * @Description  : 
  */
 
@@ -9,7 +9,7 @@ import 'package:equatable/equatable.dart';
 import 'package:tcp_client/repositories/common_models/message.dart';
 
 enum ChatHistoryType { outcome, income }
-enum ChatHistoryStatus { none, sending, downloading, done, failed }
+enum ChatHistoryStatus { none, processing, sending, downloading, done, failed }
 
 class ChatHistory extends Equatable {
   final Message message;

lib/chat/view/common/file_box.dart

@@ -1,13 +1,14 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-14 17:07:13
- * @LastEditTime : 2022-10-15 11:40:47
+ * @LastEditTime : 2022-10-18 15:44:34
  * @Description  : 
  */
 
 import 'package:easy_debounce/easy_debounce.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:loading_indicator/loading_indicator.dart';
 import 'package:tcp_client/chat/cubit/chat_cubit.dart';
 import 'package:tcp_client/chat/model/chat_history.dart';
 
@@ -22,7 +23,7 @@ class FileBox extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return InkWell(
-      onTap: (history.status == ChatHistoryStatus.downloading || history.status == ChatHistoryStatus.sending) ? null : () {
+      onTap: (history.status == ChatHistoryStatus.downloading || history.status == ChatHistoryStatus.sending || history.status == ChatHistoryStatus.processing) ? null : () {
         EasyDebounce.debounce(
           'findfile${history.message.contentmd5}',
           const Duration(milliseconds: 500),
@@ -49,6 +50,14 @@ class FileBox extends StatelessWidget {
                   Icons.refresh_rounded,
                   size: 24,
                   color: history.type == ChatHistoryType.income ? Colors.red[800] : Colors.white.withOpacity(0.8),
+                ) : history.status == ChatHistoryStatus.processing ? 
+                SizedBox(
+                  height: 18.0,
+                  width: 18.0,
+                  child: LoadingIndicator(
+                    indicatorType: Indicator.ballPulseSync,
+                    colors: [Colors.white.withOpacity(0.8)],
+                  ),
                 ) : 
                 SizedBox(
                   height: 18.0,

lib/chat/view/input_box/cubit/input_cubit.dart

@@ -1,7 +1,7 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-14 21:57:05
- * @LastEditTime : 2022-10-18 11:25:09
+ * @LastEditTime : 2022-10-18 15:30:09
  * @Description  : 
  */
 
@@ -33,7 +33,6 @@ class MessageInputCubit extends Cubit<MessageInputState> {
       targetid: chatCubit.userID,
       contenttype: MessageType.plaintext,
       content: state.input.value,
-      token: (await SharedPreferences.getInstance()).getInt('token')!
     ));
     emit(state.copyWith(
       status: FormzStatus.pure,

lib/chat/view/input_box/input_box.dart

@@ -1,7 +1,7 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-14 17:54:30
- * @LastEditTime : 2022-10-18 11:25:12
+ * @LastEditTime : 2022-10-18 15:30:05
  * @Description  : 
  */
 
@@ -16,6 +16,7 @@ import 'package:tcp_client/chat/view/input_box/cubit/input_cubit.dart';
 import 'package:tcp_client/chat/view/input_box/cubit/input_state.dart';
 import 'package:tcp_client/chat/view/input_box/model/input.dart';
 import 'package:tcp_client/repositories/common_models/message.dart';
+import 'package:tcp_client/repositories/local_service_repository/models/local_file.dart';
 
 class InputBox extends StatelessWidget {
   InputBox({super.key});
@@ -71,10 +72,9 @@ class InputBox extends StatelessWidget {
                     var newMessage = Message(
                       userid: (await SharedPreferences.getInstance()).getInt('userid')!,
                       targetid: chatCubit.userID,
-                      content: basename(file.file.path),
+                      content: basename(file.path),
                       contenttype: MessageType.file,
-                      payload: file,
+                      payload: LocalFile(file: file, filemd5: ""),
-                      token: (await SharedPreferences.getInstance()).getInt('token')!
                     );
                     chatCubit.addMessage(newMessage);
                   }

lib/repositories/common_models/message.dart

@@ -1,7 +1,7 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-11 10:30:05
- * @LastEditTime : 2022-10-18 14:20:02
+ * @LastEditTime : 2022-10-18 16:53:04
  * @Description  : 
  */
 
@@ -35,13 +35,31 @@ class Message extends JSONEncodable {
   late final String? _filemd5;
   final LocalFile? _payload;
 
+  Message._internal({
+    required int userid,
+    required int targetid,
+    required MessageType contenttype,
+    required String content,
+    required int timestamp,
+    required String contentmd5,
+    required String? filemd5,
+    required LocalFile? payload
+  }): 
+    _userid = userid,
+    _targetid = targetid,
+    _contenttype = contenttype,
+    _content = content,
+    _timestamp = timestamp,
+    _contentmd5 = contentmd5,
+    _filemd5 = filemd5,
+    _payload = payload;
+
   Message({
     required int userid,
     required int targetid,
     required MessageType contenttype,
     required String content,
-    LocalFile? payload,
+    LocalFile? payload
-    required int token
   }):
    _userid = userid,
    _targetid = targetid,
@@ -71,6 +89,32 @@ class Message extends JSONEncodable {
     _filemd5 = jsonObject['filemd5'] as String?,
     _payload = payload;
   
+  Message copyWith({
+    int? userid,
+    int? targetid,
+    MessageType? contenttype,
+    String? content,
+    int? timestamp,
+    LocalFile? payload
+  }) {
+    return Message._internal(
+      userid: userid ?? _userid,
+      targetid: targetid ?? _targetid,
+      contenttype: contenttype ?? _contenttype,
+      content: content == null ? _content : base64.encode(utf8.encode(content)),
+      timestamp: timestamp ?? _timestamp,
+      contentmd5: content != null || userid != null || targetid != null ?
+                    md5.convert(
+                      utf8.encode(content ?? contentDecoded).toList()
+                      ..addAll(Uint8List(4)..buffer.asInt32List()[0] = userid ?? _userid)
+                      ..addAll(Uint8List(4)..buffer.asInt32List()[0] = targetid ?? _targetid)
+                      ..addAll(Uint8List(4)..buffer.asInt32List()[0] = timestamp ?? _timestamp)
+                    ).toString() : _contentmd5,
+      filemd5: payload?.filemd5 ?? _filemd5,
+      payload: payload ?? _payload
+    );
+  }
+
   int get senderID => _userid;
   int get recieverID => _targetid;
   MessageType get type => _contenttype;

lib/repositories/local_service_repository/local_service_repository.dart

@@ -1,7 +1,7 @@
 /*
  * @Author       : Linloir
  * @Date         : 2022-10-11 10:56:02
- * @LastEditTime : 2022-10-18 14:35:25
+ * @LastEditTime : 2022-10-18 15:13:27
  * @Description  : Local Service Repository
  */
 
@@ -109,23 +109,24 @@ class LocalServiceRepository {
   }
 
   //Calls on the system to open the file
-  Future<LocalFile?> pickFile(FileType fileType) async {
+  Future<File?> pickFile(FileType fileType) async {
     var filePickResult = await FilePicker.platform.pickFiles(
       type: fileType,
       allowMultiple: false,
     );
     if (filePickResult == null) return null;
     var file = File(filePickResult.files.single.path!);
-    var md5Output = AccumulatorSink<Digest>();
+    // var md5Output = AccumulatorSink<Digest>();
-    ByteConversionSink md5Input = md5.startChunkedConversion(md5Output);
+    // ByteConversionSink md5Input = md5.startChunkedConversion(md5Output);
-    await for(var bytes in file.openRead()) {
+    // await for(var bytes in file.openRead()) {
-      md5Input.add(bytes);
+    //   md5Input.add(bytes);
-    }
+    // }
-    md5Input.close();
+    // md5Input.close();
-    return LocalFile(
+    // return LocalFile(
-      file: file, 
+    //   file: file, 
-      filemd5: md5Output.events.single.toString()
+    //   filemd5: md5Output.events.single.toString()
-    );
+    // );
+    return file;
   }
 
   Future<void> storeMessages(List<Message> messages) async {