added chat app
This commit is contained in:
tom.hempel
552
Chat-App/lib/screens/chat_screen.dart
Normal file
552
Chat-App/lib/screens/chat_screen.dart
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@ -0,0 +1,552 @@
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:ai_chat_lab/services/convai_service.dart';
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import 'package:ai_chat_lab/services/storage_service.dart';
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import 'package:ai_chat_lab/screens/settings_screen.dart';
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import 'package:ai_chat_lab/models/chat_message.dart';
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import 'dart:async';
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class ChatScreen extends StatefulWidget {
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const ChatScreen({super.key});
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@override
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State<ChatScreen> createState() => _ChatScreenState();
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}
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class _ChatScreenState extends State<ChatScreen> {
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final TextEditingController _messageController = TextEditingController();
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final TextEditingController _participantController = TextEditingController();
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final ScrollController _scrollController = ScrollController();
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final ConvaiService _convaiService = ConvaiService();
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final StorageService _storageService = StorageService();
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List<ChatMessage> messages = [];
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bool isLoading = false;
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String participantId = '';
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bool _supervisedMode = false;
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bool _initialTurnPending = false;
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String _initialPrompt = '';
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bool _timedExperiment = false;
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int _experimentDuration = 5;
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DateTime? _experimentStartTime;
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Timer? _experimentTimer;
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bool _experimentExpired = false;
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Duration _timeRemaining = Duration.zero;
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@override
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void initState() {
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super.initState();
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_loadSettings();
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}
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Future<void> _loadSettings() async {
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await _convaiService.loadSettings();
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final supervised = await _convaiService.isSupervisedModeEnabled();
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final initPrompt = await _convaiService.getCharacterInitialPrompt(_convaiService.characterId);
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final timedExperiment = await _convaiService.isTimedExperimentEnabled();
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final duration = await _convaiService.getExperimentDurationMinutes();
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setState(() {
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_supervisedMode = supervised;
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_initialPrompt = initPrompt;
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_initialTurnPending = supervised; // first message gated
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_timedExperiment = timedExperiment;
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_experimentDuration = duration;
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});
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}
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void _startExperiment() {
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if (_timedExperiment && _experimentStartTime == null) {
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_experimentStartTime = DateTime.now();
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_startExperimentTimer();
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}
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}
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void _startExperimentTimer() {
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_experimentTimer?.cancel();
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_experimentTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
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final now = DateTime.now();
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final elapsed = now.difference(_experimentStartTime!);
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final totalDuration = Duration(minutes: _experimentDuration);
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if (elapsed >= totalDuration) {
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setState(() {
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_experimentExpired = true;
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_timeRemaining = Duration.zero;
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});
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_experimentTimer?.cancel();
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} else {
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setState(() {
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_timeRemaining = totalDuration - elapsed;
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});
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}
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});
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}
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Future<void> _sendMessage() async {
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final text = _messageController.text.trim();
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if (text.isEmpty || isLoading) return;
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// Start experiment timer on first message
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if (messages.isEmpty) {
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_startExperiment();
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}
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setState(() {
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messages.add(ChatMessage(text: text, isUser: true));
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isLoading = true;
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});
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_messageController.clear();
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_scrollToBottom();
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try {
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final response = await _convaiService.sendMessage(text);
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setState(() {
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messages.add(ChatMessage(text: response, isUser: false));
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isLoading = false;
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});
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if (await _storageService.isSavingEnabled()) {
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await _storageService.saveConversation(participantId, text, response);
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}
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} catch (e) {
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setState(() {
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messages.add(ChatMessage(text: 'Error: ${e.toString()}', isUser: false));
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isLoading = false;
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});
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}
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_scrollToBottom();
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}
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Future<void> _sendInitialPrompt() async {
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// If no initial prompt, just allow typing without sending anything
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if (_initialPrompt.trim().isEmpty) {
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setState(() {
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_initialTurnPending = false;
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});
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_startExperiment();
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return;
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}
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if (isLoading) return;
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setState(() {
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isLoading = true;
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_initialTurnPending = false;
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});
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_startExperiment();
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try {
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final response = await _convaiService.sendMessage(_initialPrompt);
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setState(() {
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// Do not attribute initial prompt as a user message in the chat transcript
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messages.add(ChatMessage(text: response, isUser: false));
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isLoading = false;
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});
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if (await _storageService.isSavingEnabled()) {
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await _storageService.saveConversation(participantId, _initialPrompt, response);
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}
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} catch (e) {
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setState(() {
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messages.add(ChatMessage(text: 'Error: ${e.toString()}', isUser: false));
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isLoading = false;
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});
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}
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_scrollToBottom();
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}
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void _scrollToBottom() {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (_scrollController.hasClients) {
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_scrollController.animateTo(
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_scrollController.position.maxScrollExtent,
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duration: const Duration(milliseconds: 300),
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curve: Curves.easeOut,
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);
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}
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});
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}
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void _clearChat() async {
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final bool? shouldClear = await showDialog<bool>(
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context: context,
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builder: (BuildContext context) {
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return AlertDialog(
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title: const Text('Clear Chat'),
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content: const Text(
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'This will clear all messages and start a new session with the character. Are you sure?',
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.of(context).pop(false),
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child: const Text('Cancel'),
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),
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TextButton(
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onPressed: () => Navigator.of(context).pop(true),
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style: TextButton.styleFrom(
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foregroundColor: Colors.red,
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),
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child: const Text('Clear'),
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),
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],
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);
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},
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);
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if (shouldClear == true) {
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setState(() {
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messages.clear();
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_initialTurnPending = _supervisedMode; // reset gating
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_experimentStartTime = null;
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_experimentExpired = false;
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_timeRemaining = Duration.zero;
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});
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_experimentTimer?.cancel();
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_convaiService.resetSession();
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Chat cleared and new session started'),
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duration: Duration(seconds: 2),
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),
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);
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}
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}
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String _formatDuration(Duration duration) {
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String twoDigits(int n) => n.toString().padLeft(2, '0');
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final minutes = twoDigits(duration.inMinutes.remainder(60));
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final seconds = twoDigits(duration.inSeconds.remainder(60));
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return '$minutes:$seconds';
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: const Color(0xFFF8FAFC),
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appBar: AppBar(
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title: const Text(
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'Convai Chat',
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style: TextStyle(
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fontWeight: FontWeight.w600,
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letterSpacing: 1,
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),
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),
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backgroundColor: Colors.white,
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elevation: 0,
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foregroundColor: const Color(0xFF2D3748),
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actions: [
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IconButton(
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icon: const Icon(Icons.clear_all),
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onPressed: _clearChat,
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tooltip: 'Clear Chat',
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),
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IconButton(
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icon: const Icon(Icons.settings),
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onPressed: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => const SettingsScreen(),
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),
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).then((_) => _loadSettings());
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},
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tooltip: 'Settings',
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),
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],
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),
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body: Column(
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children: [
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Container(
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padding: const EdgeInsets.all(16),
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decoration: const BoxDecoration(
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color: Colors.white,
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border: Border(
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bottom: BorderSide(color: Color(0xFFE0E7EF)),
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),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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TextField(
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controller: _participantController,
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onChanged: (value) => participantId = value,
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decoration: InputDecoration(
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labelText: 'Participant ID',
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hintText: 'Enter participant ID for this session',
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: Color(0xFFCBD5E1)),
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),
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focusedBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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borderSide: const BorderSide(color: Color(0xFF4F8CFF), width: 2),
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),
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contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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filled: true,
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fillColor: const Color(0xFFF8FAFC),
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),
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),
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if (_timedExperiment && _experimentStartTime != null && !_experimentExpired)
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Padding(
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padding: const EdgeInsets.only(top: 8.0),
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child: Row(
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children: [
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const Icon(Icons.timer, size: 16, color: Color(0xFF4F8CFF)),
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const SizedBox(width: 6),
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Text(
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'Time remaining: ${_formatDuration(_timeRemaining)}',
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style: const TextStyle(fontSize: 12, color: Color(0xFF64748B), fontWeight: FontWeight.w500),
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),
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],
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),
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),
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if (_supervisedMode)
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Padding(
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padding: const EdgeInsets.only(top: 8.0),
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child: Row(
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children: [
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const Icon(Icons.flag, size: 16, color: Color(0xFF4F8CFF)),
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const SizedBox(width: 6),
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Expanded(
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child: Text(
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_initialTurnPending
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? 'Supervised Mode: Press "Start Experiment" to begin.'
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: 'Supervised Mode: You may now type.',
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style: const TextStyle(fontSize: 12, color: Color(0xFF64748B)),
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),
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),
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],
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),
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),
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],
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),
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),
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if (_timedExperiment && _experimentExpired)
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Expanded(
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child: Container(
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margin: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: const Color(0xFFE0E7EF)),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(Icons.timer_off, size: 64, color: Color(0xFF64748B)),
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SizedBox(height: 16),
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Text(
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'Experiment Time Expired',
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style: TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.w600,
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color: Color(0xFF2D3748),
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),
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),
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SizedBox(height: 8),
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Text(
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'The chat is now hidden as the time limit has been reached.',
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style: TextStyle(
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fontSize: 14,
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color: Color(0xFF64748B),
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),
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textAlign: TextAlign.center,
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),
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],
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),
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),
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),
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)
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else
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Expanded(
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child: Container(
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margin: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: const Color(0xFFE0E7EF)),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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||||
blurRadius: 10,
|
||||
offset: const Offset(0, 2),
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||||
),
|
||||
],
|
||||
),
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child: Column(
|
||||
children: [
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Expanded(
|
||||
child: ListView.builder(
|
||||
controller: _scrollController,
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padding: const EdgeInsets.all(16),
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||||
itemCount: messages.length + (isLoading ? 1 : 0),
|
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itemBuilder: (context, index) {
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if (index == messages.length && isLoading) {
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return const Padding(
|
||||
padding: EdgeInsets.all(8.0),
|
||||
child: Row(
|
||||
children: [
|
||||
SizedBox(
|
||||
width: 20,
|
||||
height: 20,
|
||||
child: CircularProgressIndicator(strokeWidth: 2),
|
||||
),
|
||||
SizedBox(width: 12),
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||||
Text('Thinking...'),
|
||||
],
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
final message = messages[index];
|
||||
return Container(
|
||||
margin: const EdgeInsets.only(bottom: 8),
|
||||
child: Row(
|
||||
mainAxisAlignment: message.isUser
|
||||
? MainAxisAlignment.end
|
||||
: MainAxisAlignment.start,
|
||||
children: [
|
||||
Container(
|
||||
constraints: BoxConstraints(
|
||||
maxWidth: MediaQuery.of(context).size.width * 0.7,
|
||||
),
|
||||
padding: const EdgeInsets.symmetric(
|
||||
horizontal: 16,
|
||||
vertical: 12,
|
||||
),
|
||||
decoration: BoxDecoration(
|
||||
color: message.isUser
|
||||
? const Color(0xFF4F8CFF)
|
||||
: const Color(0xFFF1F5FB),
|
||||
borderRadius: BorderRadius.circular(16).copyWith(
|
||||
bottomRight: message.isUser
|
||||
? const Radius.circular(4)
|
||||
: const Radius.circular(16),
|
||||
bottomLeft: message.isUser
|
||||
? const Radius.circular(16)
|
||||
: const Radius.circular(4),
|
||||
),
|
||||
),
|
||||
child: Text(
|
||||
message.text,
|
||||
style: TextStyle(
|
||||
color: message.isUser
|
||||
? Colors.white
|
||||
: const Color(0xFF2D3748),
|
||||
fontSize: 16,
|
||||
height: 1.4,
|
||||
),
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
);
|
||||
},
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
),
|
||||
),
|
||||
|
||||
if (!(_timedExperiment && _experimentExpired))
|
||||
Container(
|
||||
padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
|
||||
child: Row(
|
||||
children: [
|
||||
if (_supervisedMode && _initialTurnPending)
|
||||
Expanded(
|
||||
child: SizedBox(
|
||||
height: 48,
|
||||
child: ElevatedButton.icon(
|
||||
onPressed: isLoading ? null : _sendInitialPrompt,
|
||||
icon: const Icon(Icons.play_arrow),
|
||||
label: const Text('Start Experiment'),
|
||||
style: ElevatedButton.styleFrom(
|
||||
backgroundColor: const Color(0xFF4F8CFF),
|
||||
foregroundColor: Colors.white,
|
||||
shape: RoundedRectangleBorder(
|
||||
borderRadius: BorderRadius.circular(12),
|
||||
),
|
||||
),
|
||||
),
|
||||
),
|
||||
)
|
||||
else ...[
|
||||
Expanded(
|
||||
child: KeyboardListener(
|
||||
focusNode: FocusNode(),
|
||||
onKeyEvent: (KeyEvent event) {
|
||||
if (event is KeyDownEvent) {
|
||||
if (event.logicalKey == LogicalKeyboardKey.enter) {
|
||||
if (!HardwareKeyboard.instance.isShiftPressed) {
|
||||
_sendMessage();
|
||||
}
|
||||
}
|
||||
}
|
||||
},
|
||||
child: TextField(
|
||||
controller: _messageController,
|
||||
decoration: InputDecoration(
|
||||
hintText: 'Type your message... (Enter to send, Shift+Enter for new line)',
|
||||
border: OutlineInputBorder(
|
||||
borderRadius: BorderRadius.circular(24),
|
||||
borderSide: const BorderSide(color: Color(0xFFCBD5E1)),
|
||||
),
|
||||
focusedBorder: OutlineInputBorder(
|
||||
borderRadius: BorderRadius.circular(24),
|
||||
borderSide: const BorderSide(color: Color(0xFF4F8CFF), width: 2),
|
||||
),
|
||||
contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
|
||||
filled: true,
|
||||
fillColor: Colors.white,
|
||||
),
|
||||
keyboardType: TextInputType.multiline,
|
||||
maxLines: null,
|
||||
minLines: 1,
|
||||
textCapitalization: TextCapitalization.sentences,
|
||||
),
|
||||
),
|
||||
),
|
||||
const SizedBox(width: 8),
|
||||
Container(
|
||||
decoration: const BoxDecoration(
|
||||
color: Color(0xFF4F8CFF),
|
||||
shape: BoxShape.circle,
|
||||
),
|
||||
child: IconButton(
|
||||
icon: const Icon(Icons.send, color: Colors.white),
|
||||
onPressed: isLoading ? null : _sendMessage,
|
||||
),
|
||||
),
|
||||
],
|
||||
],
|
||||
),
|
||||
),
|
||||
],
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
@override
|
||||
void dispose() {
|
||||
_experimentTimer?.cancel();
|
||||
_messageController.dispose();
|
||||
_participantController.dispose();
|
||||
_scrollController.dispose();
|
||||
super.dispose();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user