767 lines
25 KiB
Dart
767 lines
25 KiB
Dart
import 'dart:math' as math;
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import 'package:auto_route/auto_route.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:trainhub_flutter/core/constants/ui_constants.dart';
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import 'package:trainhub_flutter/core/theme/app_colors.dart';
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import 'package:trainhub_flutter/domain/entities/chat_message.dart';
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import 'package:trainhub_flutter/domain/entities/chat_session.dart';
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import 'package:trainhub_flutter/presentation/chat/chat_controller.dart';
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import 'package:trainhub_flutter/presentation/chat/chat_state.dart';
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@RoutePage()
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class ChatPage extends ConsumerStatefulWidget {
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const ChatPage({super.key});
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@override
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ConsumerState<ChatPage> createState() => _ChatPageState();
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}
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class _ChatPageState extends ConsumerState<ChatPage> {
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final TextEditingController _inputController = TextEditingController();
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final ScrollController _scrollController = ScrollController();
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final FocusNode _inputFocusNode = FocusNode();
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String? _hoveredSessionId;
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@override
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void dispose() {
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_inputController.dispose();
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_scrollController.dispose();
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_inputFocusNode.dispose();
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super.dispose();
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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 _sendMessage(ChatController controller) {
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final text = _inputController.text.trim();
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if (text.isNotEmpty) {
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controller.sendMessage(text);
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_inputController.clear();
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_inputFocusNode.requestFocus();
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}
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}
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String _formatTimestamp(String timestamp) {
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try {
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final dt = DateTime.parse(timestamp);
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final now = DateTime.now();
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final hour = dt.hour.toString().padLeft(2, '0');
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final minute = dt.minute.toString().padLeft(2, '0');
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if (dt.year == now.year &&
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dt.month == now.month &&
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dt.day == now.day) {
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return '$hour:$minute';
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}
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return '${dt.day}/${dt.month} $hour:$minute';
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} catch (_) {
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return '';
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}
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}
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@override
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Widget build(BuildContext context) {
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final state = ref.watch(chatControllerProvider);
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final controller = ref.read(chatControllerProvider.notifier);
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ref.listen(chatControllerProvider, (prev, next) {
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if (next.hasValue &&
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(prev?.value?.messages.length ?? 0) <
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next.value!.messages.length) {
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_scrollToBottom();
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}
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if (next.hasValue && next.value!.isTyping && !(prev?.value?.isTyping ?? false)) {
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_scrollToBottom();
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}
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});
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return Scaffold(
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backgroundColor: AppColors.surface,
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body: Row(
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children: [
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// --- Side Panel ---
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_buildSidePanel(state, controller),
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// --- Main Chat Area ---
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Expanded(
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child: _buildChatArea(state, controller),
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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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// Side Panel
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// ---------------------------------------------------------------------------
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Widget _buildSidePanel(
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AsyncValue<ChatState> asyncState,
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ChatController controller,
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) {
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return Container(
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width: 250,
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decoration: const BoxDecoration(
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color: AppColors.surfaceContainer,
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border: Border(
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right: BorderSide(color: AppColors.border, width: 1),
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),
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),
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child: Column(
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children: [
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// New Chat button
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Padding(
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padding: const EdgeInsets.all(UIConstants.spacing12),
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child: SizedBox(
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width: double.infinity,
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child: _NewChatButton(onPressed: controller.createSession),
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),
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),
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const Divider(height: 1, color: AppColors.border),
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// Session list
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Expanded(
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child: asyncState.when(
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data: (data) {
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if (data.sessions.isEmpty) {
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return Center(
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child: Padding(
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padding: const EdgeInsets.all(UIConstants.spacing24),
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child: Text(
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'No conversations yet',
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style: TextStyle(
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color: AppColors.textMuted,
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fontSize: 13,
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),
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),
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),
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);
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}
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return ListView.builder(
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padding: const EdgeInsets.symmetric(
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vertical: UIConstants.spacing8,
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),
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itemCount: data.sessions.length,
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itemBuilder: (context, index) {
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final session = data.sessions[index];
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final isActive =
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session.id == data.activeSession?.id;
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return _buildSessionTile(
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session: session,
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isActive: isActive,
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controller: controller,
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);
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},
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);
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},
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error: (_, __) => Center(
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child: Text(
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'Error loading sessions',
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style: TextStyle(color: AppColors.textMuted, fontSize: 13),
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),
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),
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loading: () => const Center(
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child: SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: AppColors.textMuted,
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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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}
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Widget _buildSessionTile({
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required ChatSessionEntity session,
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required bool isActive,
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required ChatController controller,
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}) {
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final isHovered = _hoveredSessionId == session.id;
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return MouseRegion(
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onEnter: (_) => setState(() => _hoveredSessionId = session.id),
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onExit: (_) => setState(() {
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if (_hoveredSessionId == session.id) {
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_hoveredSessionId = null;
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}
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}),
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child: GestureDetector(
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onTap: () => controller.loadSession(session.id),
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child: AnimatedContainer(
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duration: const Duration(milliseconds: 150),
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margin: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing8,
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vertical: 2,
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),
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padding: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing12,
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vertical: UIConstants.spacing8,
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),
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decoration: BoxDecoration(
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color: isActive
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? AppColors.zinc700.withValues(alpha: 0.7)
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: isHovered
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? AppColors.zinc800.withValues(alpha: 0.6)
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: Colors.transparent,
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borderRadius: BorderRadius.circular(UIConstants.smallBorderRadius),
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border: isActive
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? Border.all(
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color: AppColors.accent.withValues(alpha: 0.3),
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width: 1,
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)
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: null,
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),
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child: Row(
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children: [
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Icon(
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Icons.chat_bubble_outline_rounded,
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size: 14,
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color: isActive ? AppColors.accent : AppColors.textMuted,
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),
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const SizedBox(width: UIConstants.spacing8),
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Expanded(
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child: Text(
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session.title ?? 'New Chat',
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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style: TextStyle(
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color: isActive
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? AppColors.textPrimary
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: AppColors.textSecondary,
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fontSize: 13,
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fontWeight:
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isActive ? FontWeight.w500 : FontWeight.normal,
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),
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),
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),
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// Delete button appears on hover
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AnimatedOpacity(
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duration: const Duration(milliseconds: 150),
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opacity: isHovered ? 1.0 : 0.0,
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child: IgnorePointer(
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ignoring: !isHovered,
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child: SizedBox(
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width: 24,
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height: 24,
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child: IconButton(
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padding: EdgeInsets.zero,
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iconSize: 14,
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splashRadius: 14,
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icon: const Icon(
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Icons.delete_outline_rounded,
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color: AppColors.textMuted,
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),
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onPressed: () => controller.deleteSession(session.id),
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tooltip: 'Delete',
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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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);
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}
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// ---------------------------------------------------------------------------
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// Chat Area
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// ---------------------------------------------------------------------------
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Widget _buildChatArea(
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AsyncValue<ChatState> asyncState,
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ChatController controller,
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) {
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return Column(
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children: [
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// Messages
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Expanded(
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child: asyncState.when(
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data: (data) {
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if (data.messages.isEmpty) {
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return _buildEmptyState();
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}
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return ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing24,
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vertical: UIConstants.spacing16,
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),
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itemCount:
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data.messages.length + (data.isTyping ? 1 : 0),
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itemBuilder: (context, index) {
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if (index == data.messages.length) {
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return const _TypingIndicator();
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}
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final msg = data.messages[index];
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return _MessageBubble(
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message: msg,
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formattedTime: _formatTimestamp(msg.createdAt),
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);
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},
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);
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},
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error: (e, _) => Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Icon(
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Icons.error_outline_rounded,
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color: AppColors.destructive,
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size: 40,
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),
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const SizedBox(height: UIConstants.spacing12),
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Text(
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'Something went wrong',
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style: TextStyle(
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color: AppColors.textSecondary,
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fontSize: 14,
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),
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),
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],
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),
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),
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loading: () => const Center(
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child: SizedBox(
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width: 24,
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height: 24,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: AppColors.textMuted,
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),
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),
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),
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),
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),
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// Input area
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_buildInputBar(asyncState, controller),
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],
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);
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}
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Widget _buildEmptyState() {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Container(
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width: 64,
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height: 64,
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decoration: BoxDecoration(
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color: AppColors.surfaceContainerHigh,
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borderRadius: BorderRadius.circular(16),
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),
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child: const Icon(
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Icons.auto_awesome_outlined,
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size: 32,
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color: AppColors.textMuted,
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),
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),
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const SizedBox(height: UIConstants.spacing16),
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const Text(
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'Ask me anything about your training!',
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style: TextStyle(
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color: AppColors.textSecondary,
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fontSize: 15,
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fontWeight: FontWeight.w500,
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),
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),
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const SizedBox(height: UIConstants.spacing8),
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const Text(
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'Start a conversation to get personalized advice.',
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style: TextStyle(
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color: AppColors.textMuted,
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fontSize: 13,
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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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// Input Bar
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// ---------------------------------------------------------------------------
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Widget _buildInputBar(
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AsyncValue<ChatState> asyncState,
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ChatController controller,
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) {
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final isTyping = asyncState.valueOrNull?.isTyping ?? false;
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return Container(
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decoration: const BoxDecoration(
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color: AppColors.surface,
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border: Border(
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top: BorderSide(color: AppColors.border, width: 1),
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),
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),
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padding: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing16,
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vertical: UIConstants.spacing12,
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),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.end,
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children: [
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Expanded(
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child: Container(
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decoration: BoxDecoration(
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color: AppColors.surfaceContainer,
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borderRadius:
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BorderRadius.circular(UIConstants.borderRadius),
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border: Border.all(color: AppColors.border, width: 1),
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),
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child: TextField(
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controller: _inputController,
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focusNode: _inputFocusNode,
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style: const TextStyle(
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color: AppColors.textPrimary,
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fontSize: 14,
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),
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maxLines: 4,
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minLines: 1,
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decoration: InputDecoration(
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hintText: 'Type a message...',
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hintStyle: TextStyle(
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color: AppColors.textMuted,
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fontSize: 14,
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),
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contentPadding: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing16,
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vertical: UIConstants.spacing12,
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),
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border: InputBorder.none,
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enabledBorder: InputBorder.none,
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focusedBorder: InputBorder.none,
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),
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onSubmitted: (_) => _sendMessage(controller),
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textInputAction: TextInputAction.send,
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),
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),
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),
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const SizedBox(width: UIConstants.spacing8),
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SizedBox(
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width: 40,
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height: 40,
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child: Material(
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color: isTyping ? AppColors.zinc700 : AppColors.accent,
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borderRadius:
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BorderRadius.circular(UIConstants.borderRadius),
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child: InkWell(
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borderRadius:
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BorderRadius.circular(UIConstants.borderRadius),
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onTap: isTyping ? null : () => _sendMessage(controller),
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child: Icon(
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Icons.arrow_upward_rounded,
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color: isTyping ? AppColors.textMuted : AppColors.zinc950,
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size: 20,
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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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}
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// =============================================================================
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// New Chat Button
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// =============================================================================
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class _NewChatButton extends StatefulWidget {
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const _NewChatButton({required this.onPressed});
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final VoidCallback onPressed;
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@override
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State<_NewChatButton> createState() => _NewChatButtonState();
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}
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class _NewChatButtonState extends State<_NewChatButton> {
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bool _isHovered = false;
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@override
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Widget build(BuildContext context) {
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return MouseRegion(
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onEnter: (_) => setState(() => _isHovered = true),
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onExit: (_) => setState(() => _isHovered = false),
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child: AnimatedContainer(
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duration: const Duration(milliseconds: 150),
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decoration: BoxDecoration(
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color: _isHovered
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? AppColors.zinc700
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: AppColors.surfaceContainerHigh,
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borderRadius: BorderRadius.circular(UIConstants.smallBorderRadius),
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border: Border.all(color: AppColors.border, width: 1),
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),
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child: Material(
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color: Colors.transparent,
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child: InkWell(
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borderRadius:
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BorderRadius.circular(UIConstants.smallBorderRadius),
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onTap: widget.onPressed,
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child: Padding(
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padding: const EdgeInsets.symmetric(
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horizontal: UIConstants.spacing12,
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vertical: UIConstants.spacing8,
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),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: const [
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Icon(
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Icons.add_rounded,
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size: 16,
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color: AppColors.textSecondary,
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),
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SizedBox(width: UIConstants.spacing8),
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Text(
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'New Chat',
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style: TextStyle(
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color: AppColors.textSecondary,
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fontSize: 13,
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fontWeight: FontWeight.w500,
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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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);
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}
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}
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// =============================================================================
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// Message Bubble
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// =============================================================================
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class _MessageBubble extends StatelessWidget {
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const _MessageBubble({
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required this.message,
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required this.formattedTime,
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});
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final ChatMessageEntity message;
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final String formattedTime;
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@override
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Widget build(BuildContext context) {
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final isUser = message.isUser;
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final maxWidth = MediaQuery.of(context).size.width * 0.55;
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return Padding(
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padding: const EdgeInsets.only(bottom: UIConstants.spacing12),
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child: Row(
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mainAxisAlignment:
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isUser ? MainAxisAlignment.end : MainAxisAlignment.start,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (!isUser) ...[
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Container(
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width: 28,
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height: 28,
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decoration: BoxDecoration(
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color: AppColors.surfaceContainerHigh,
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borderRadius: BorderRadius.circular(8),
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),
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child: const Icon(
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Icons.auto_awesome_rounded,
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size: 14,
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color: AppColors.accent,
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),
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),
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const SizedBox(width: UIConstants.spacing8),
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],
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Flexible(
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child: Column(
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crossAxisAlignment:
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isUser ? CrossAxisAlignment.end : CrossAxisAlignment.start,
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children: [
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Container(
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constraints: BoxConstraints(maxWidth: maxWidth),
|
|
padding: const EdgeInsets.symmetric(
|
|
horizontal: UIConstants.spacing16,
|
|
vertical: UIConstants.spacing12,
|
|
),
|
|
decoration: BoxDecoration(
|
|
color: isUser
|
|
? AppColors.zinc700
|
|
: AppColors.surfaceContainer,
|
|
borderRadius: BorderRadius.only(
|
|
topLeft: const Radius.circular(16),
|
|
topRight: const Radius.circular(16),
|
|
bottomLeft:
|
|
isUser ? const Radius.circular(16) : const Radius.circular(4),
|
|
bottomRight:
|
|
isUser ? const Radius.circular(4) : const Radius.circular(16),
|
|
),
|
|
border: isUser
|
|
? null
|
|
: Border.all(color: AppColors.border, width: 1),
|
|
),
|
|
child: SelectableText(
|
|
message.content,
|
|
style: TextStyle(
|
|
color: AppColors.textPrimary,
|
|
fontSize: 14,
|
|
height: 1.5,
|
|
),
|
|
),
|
|
),
|
|
const SizedBox(height: 4),
|
|
Padding(
|
|
padding: const EdgeInsets.symmetric(horizontal: 4),
|
|
child: Text(
|
|
formattedTime,
|
|
style: const TextStyle(
|
|
color: AppColors.textMuted,
|
|
fontSize: 11,
|
|
),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
if (isUser) ...[
|
|
const SizedBox(width: UIConstants.spacing8),
|
|
Container(
|
|
width: 28,
|
|
height: 28,
|
|
decoration: BoxDecoration(
|
|
color: AppColors.accent.withValues(alpha: 0.15),
|
|
borderRadius: BorderRadius.circular(8),
|
|
),
|
|
child: const Icon(
|
|
Icons.person_rounded,
|
|
size: 14,
|
|
color: AppColors.accent,
|
|
),
|
|
),
|
|
],
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
// =============================================================================
|
|
// Typing Indicator (3 animated bouncing dots)
|
|
// =============================================================================
|
|
class _TypingIndicator extends StatefulWidget {
|
|
const _TypingIndicator();
|
|
|
|
@override
|
|
State<_TypingIndicator> createState() => _TypingIndicatorState();
|
|
}
|
|
|
|
class _TypingIndicatorState extends State<_TypingIndicator>
|
|
with SingleTickerProviderStateMixin {
|
|
late final AnimationController _controller;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
_controller = AnimationController(
|
|
vsync: this,
|
|
duration: const Duration(milliseconds: 1200),
|
|
)..repeat();
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
_controller.dispose();
|
|
super.dispose();
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Padding(
|
|
padding: const EdgeInsets.only(bottom: UIConstants.spacing12),
|
|
child: Row(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Container(
|
|
width: 28,
|
|
height: 28,
|
|
decoration: BoxDecoration(
|
|
color: AppColors.surfaceContainerHigh,
|
|
borderRadius: BorderRadius.circular(8),
|
|
),
|
|
child: const Icon(
|
|
Icons.auto_awesome_rounded,
|
|
size: 14,
|
|
color: AppColors.accent,
|
|
),
|
|
),
|
|
const SizedBox(width: UIConstants.spacing8),
|
|
Container(
|
|
padding: const EdgeInsets.symmetric(
|
|
horizontal: UIConstants.spacing16,
|
|
vertical: UIConstants.spacing12,
|
|
),
|
|
decoration: BoxDecoration(
|
|
color: AppColors.surfaceContainer,
|
|
borderRadius: const BorderRadius.only(
|
|
topLeft: Radius.circular(16),
|
|
topRight: Radius.circular(16),
|
|
bottomLeft: Radius.circular(4),
|
|
bottomRight: Radius.circular(16),
|
|
),
|
|
border: Border.all(color: AppColors.border, width: 1),
|
|
),
|
|
child: AnimatedBuilder(
|
|
animation: _controller,
|
|
builder: (context, _) {
|
|
return Row(
|
|
mainAxisSize: MainAxisSize.min,
|
|
children: List.generate(3, (index) {
|
|
// Stagger each dot by 0.2 of the animation cycle
|
|
final delay = index * 0.2;
|
|
final t = (_controller.value - delay) % 1.0;
|
|
// Bounce: use a sin curve over the first half, rest at 0
|
|
final bounce =
|
|
t < 0.5 ? math.sin(t * math.pi * 2) * 4.0 : 0.0;
|
|
|
|
return Padding(
|
|
padding: EdgeInsets.only(
|
|
left: index == 0 ? 0 : 4,
|
|
),
|
|
child: Transform.translate(
|
|
offset: Offset(0, -bounce.abs()),
|
|
child: Container(
|
|
width: 7,
|
|
height: 7,
|
|
decoration: BoxDecoration(
|
|
color: AppColors.textMuted,
|
|
shape: BoxShape.circle,
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}),
|
|
);
|
|
},
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|