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99 lines
2.5 KiB
Dart
99 lines
2.5 KiB
Dart
import 'dart:convert';
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import 'package:dash_chat/dash_chat.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_hbb/pages/chat_page.dart';
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import 'model.dart';
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class ChatModel with ChangeNotifier {
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// -1作为客户端模式的id，客户端模式下此id唯一
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// 其它正整数的id，来自被控服务器模式下的其他客户端的id，每个客户端有不同的id
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// 注意 此id和peer_id不同，服务端模式下的id等同于conn的顺序累加id
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static final clientModeID = -1;
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final Map<int, List<ChatMessage>> _messages = Map()..[clientModeID] = [];
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final ChatUser me = ChatUser(
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uid:"",
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name: "me",
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);
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final _scroller = ScrollController();
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var _currentID = clientModeID;
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ScrollController get scroller => _scroller;
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Map<int, List<ChatMessage>> get messages => _messages;
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int get currentID => _currentID;
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changeCurrentID(int id){
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if(_messages.containsKey(id)){
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_currentID = id;
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notifyListeners();
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}
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}
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receive(int id, String text) {
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if (text.isEmpty) return;
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// first message show overlay icon
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if (iconOverlayEntry == null) {
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showChatIconOverlay();
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}
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late final chatUser;
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if(id == clientModeID){
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chatUser = ChatUser(
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name: FFI.ffiModel.pi.username,
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uid: FFI.getId(),
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);
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}else{
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chatUser = FFI.serverModel.clients[id]?.chatUser;
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}
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if(chatUser == null){
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return debugPrint("Failed to receive msg,user doesn't exist");
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}
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if(!_messages.containsKey(id)){
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_messages[id] = [];
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}
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_messages[id]!.add(ChatMessage(
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text: text,
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user: chatUser));
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_currentID = id;
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notifyListeners();
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scrollToBottom();
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}
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scrollToBottom(){
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Future.delayed(Duration(milliseconds: 500), () {
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_scroller.animateTo(
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_scroller.position.maxScrollExtent,
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duration: Duration(milliseconds: 200),
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curve: Curves.fastLinearToSlowEaseIn);
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});
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}
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send(ChatMessage message) {
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if (message.text != null && message.text!.isNotEmpty) {
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_messages[_currentID]?.add(message);
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if (_currentID == clientModeID) {
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FFI.setByName("chat_client_mode", message.text!);
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} else {
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final msg = Map()
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..["id"] = _currentID
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..["text"] = message.text!;
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FFI.setByName("chat_server_mode", jsonEncode(msg));
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}
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}
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notifyListeners();
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scrollToBottom();
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}
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close() {
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hideChatIconOverlay();
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hideChatWindowOverlay();
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notifyListeners();
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}
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}
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