523 lines
17 KiB
Dart
523 lines
17 KiB
Dart
// Author: fruit.com.cn
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import 'dart:async';
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import 'dart:math' as math;
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:provider/provider.dart';
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import '../../../core/data/models/comment.dart';
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import '../../../core/data/models/drama.dart';
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import '../../../core/data/repositories/comment_repository.dart';
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import '../../../core/data/repositories/interaction_repository.dart';
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import '../../../core/data/services/auth_controller.dart';
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import '../../../core/data/services/comment_controller.dart';
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import '../../../core/formatting/error_text.dart';
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import '../../../core/theme/app_colors.dart';
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import '../../../core/widgets/auth_gate.dart';
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import '../../../core/widgets/empty_state.dart';
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import '../../../l10n/app_localizations.dart';
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import 'comment_composer_sheet.dart';
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import 'comment_tile.dart';
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const double _composerRadius = 22;
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const double _composerHeight = 44;
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const double _sendButtonSize = 38;
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const double _sheetRadius = 20;
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const double _headerHeight = 44;
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const double _replyIndent = 52;
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const double _composerTopGap = 8;
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/// 服务端评论底部弹窗：匿名列表、游标翻页、回复与登录发布。
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class DramaCommentsSheet extends StatefulWidget {
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const DramaCommentsSheet({super.key, required this.drama});
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final Drama drama;
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@override
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State<DramaCommentsSheet> createState() => _DramaCommentsSheetState();
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}
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class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
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late final CommentRepository _comments;
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late final CommentController _controller;
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OverlayEntry? _composerOverlay;
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OverlayEntry? _successOverlay;
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Timer? _successOverlayTimer;
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int? _serverCount;
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int _countRequest = 0;
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@override
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void initState() {
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super.initState();
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_comments = context.read<CommentRepository>();
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_controller = CommentController(
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comments: _comments,
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interactions: context.read<InteractionRepository>(),
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dramaId: widget.drama.id,
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);
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unawaited(_controller.load());
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unawaited(_refreshCount());
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}
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@override
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void dispose() {
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_removeComposerOverlay();
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_successOverlayTimer?.cancel();
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_successOverlay?.remove();
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_controller.dispose();
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super.dispose();
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}
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void _beginReply(DramaComment comment) {
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unawaited(_openComposer(replyTo: comment));
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}
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Future<void> _refreshCount() async {
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final request = ++_countRequest;
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try {
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final count = await _comments.count(widget.drama.id);
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if (!mounted || request != _countRequest) return;
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setState(() => _serverCount = count);
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} catch (_) {
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if (!mounted || request != _countRequest) return;
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setState(() => _serverCount = null);
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}
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}
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Future<void> _openComposer({DramaComment? replyTo}) async {
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await ensureSignedIn(context);
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if (!mounted || !context.read<AuthController>().isSignedIn) return;
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_removeComposerOverlay();
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final entry = OverlayEntry(
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builder: (_) => CommentComposerSheet(
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controller: _controller,
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replyTo: replyTo,
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onDismiss: _closeComposer,
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onPosted: _handleComposerPosted,
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),
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);
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setState(() => _composerOverlay = entry);
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Overlay.of(context, rootOverlay: true).insert(entry);
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}
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void _handleComposerPosted() {
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_closeComposer();
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_showPostSuccess();
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unawaited(_refreshCount());
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}
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void _closeComposer() {
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if (!mounted) {
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_removeComposerOverlay();
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return;
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}
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setState(_removeComposerOverlay);
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}
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void _removeComposerOverlay() {
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final entry = _composerOverlay;
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_composerOverlay = null;
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if (entry?.mounted ?? false) entry!.remove();
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FocusManager.instance.primaryFocus?.unfocus();
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}
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void _handleDismissLayerTap() {
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Navigator.pop(context);
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}
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void _showPostSuccess() {
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_successOverlayTimer?.cancel();
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_successOverlay?.remove();
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final l10n = AppLocalizations.of(context)!;
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final entry = OverlayEntry(
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builder: (_) =>
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_CommentPostSuccessOverlay(message: l10n.commentPostSuccess),
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);
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_successOverlay = entry;
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Overlay.of(context, rootOverlay: true).insert(entry);
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_successOverlayTimer = Timer(const Duration(milliseconds: 1200), () {
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if (entry.mounted) entry.remove();
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if (identical(_successOverlay, entry)) _successOverlay = null;
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});
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}
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double _sheetHeight(BuildContext context) {
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final screenHeight = MediaQuery.sizeOf(context).height;
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final topSafeArea = MediaQuery.paddingOf(context).top;
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final halfHeight = (screenHeight * 0.5).roundToDouble();
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final maxHeight = math.max(0.0, screenHeight - topSafeArea);
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return math.min(halfHeight, maxHeight);
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}
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@override
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Widget build(BuildContext context) {
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final sheetHeight = _sheetHeight(context);
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final content = Stack(
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fit: StackFit.expand,
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children: [
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Positioned.fill(
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child: GestureDetector(
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key: const Key('player-comments-dismiss-layer'),
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behavior: HitTestBehavior.opaque,
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onTap: _handleDismissLayerTap,
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),
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),
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Align(
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alignment: Alignment.bottomCenter,
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child: GestureDetector(
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behavior: HitTestBehavior.opaque,
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onTap: () {},
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child: KeyedSubtree(
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key: const Key('player-comments-sheet'),
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child: SizedBox(
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key: const Key('comment-sheet-constraints'),
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height: sheetHeight,
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child: Container(
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decoration: const BoxDecoration(
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color: AppColors.card,
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borderRadius: BorderRadius.vertical(
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top: Radius.circular(_sheetRadius),
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),
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),
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child: SafeArea(
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top: false,
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child: ListenableBuilder(
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listenable: _controller,
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builder: (context, _) {
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return Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: _content(context),
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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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return PopScope(
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canPop: _composerOverlay == null,
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onPopInvokedWithResult: (didPop, _) {
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if (!didPop && _composerOverlay != null) {
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FocusManager.instance.primaryFocus?.unfocus();
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unawaited(
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SystemChannels.textInput.invokeMethod<void>('TextInput.hide'),
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);
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}
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},
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child: content,
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);
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}
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Widget _content(BuildContext context) {
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final l10n = AppLocalizations.of(context)!;
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final count = _serverCount ?? _controller.exactCount;
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final signedIn = context.watch<AuthController>().isSignedIn;
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final composerReserve = _composerHeight + _composerTopGap;
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return Column(
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key: const Key('comment-sheet-content'),
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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SizedBox(
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height: _headerHeight,
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width: double.infinity,
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child: Stack(
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alignment: Alignment.center,
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children: [
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Text(
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count == null ? l10n.comments : l10n.commentsWithCount(count),
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key: const Key('comment-count-label'),
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textAlign: TextAlign.center,
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style: const TextStyle(
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color: AppColors.onSurface,
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fontSize: 16,
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fontWeight: FontWeight.w600,
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),
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),
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Positioned(
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left: 0,
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child: SizedBox.square(
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dimension: 44,
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child: IconButton(
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key: const Key('player-comments-close'),
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tooltip: l10n.close,
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padding: EdgeInsets.zero,
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onPressed: () => Navigator.pop(context),
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icon: const Icon(
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Icons.keyboard_arrow_down_rounded,
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size: 24,
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color: AppColors.cream,
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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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Expanded(child: _list(l10n, composerReserve: composerReserve)),
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Padding(
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key: const Key('comment-composer-area'),
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padding: const EdgeInsets.only(top: _composerTopGap),
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child: _fakeComposer(l10n, signedIn: signedIn),
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),
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],
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);
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}
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Widget _list(AppLocalizations l10n, {required double composerReserve}) {
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if (_controller.loading && _controller.comments.isEmpty) {
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return const Padding(
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padding: EdgeInsets.only(top: 4),
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child: Center(
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child: CircularProgressIndicator(key: Key('comment-list-loading')),
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),
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);
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}
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if (_controller.error != null && _controller.comments.isEmpty) {
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return Padding(
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padding: const EdgeInsets.only(top: 4),
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child: EmptyState(
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key: const Key('comment-list-error'),
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icon: Icons.cloud_off_rounded,
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title: errorText(l10n, _controller.error, l10n.commentsLoadFailed),
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actionLabel: l10n.retry,
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actionKey: const Key('comment-list-retry'),
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onAction: _controller.load,
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compact: true,
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),
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);
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}
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if (_controller.comments.isEmpty) {
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return Padding(
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padding: const EdgeInsets.only(top: 4),
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child: EmptyState(
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key: const Key('comment-list-empty'),
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icon: Icons.chat_bubble_outline_rounded,
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title: l10n.noComments,
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compact: true,
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),
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);
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}
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return ListView.builder(
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key: const Key('comment-list'),
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padding: EdgeInsets.only(top: 4, bottom: composerReserve),
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itemCount: _controller.comments.length + 1,
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itemBuilder: (context, index) {
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if (index == _controller.comments.length) return _footer(l10n);
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return _CommentThread(
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comment: _controller.comments[index],
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controller: _controller,
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handlers: CommentInteractionHandlers(onReply: _beginReply),
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);
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},
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);
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}
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Widget _footer(AppLocalizations l10n) {
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if (_controller.loadingMore) {
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return const Padding(
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padding: EdgeInsets.symmetric(vertical: 12),
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child: Center(child: CircularProgressIndicator()),
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);
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}
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if (_controller.hasMore) {
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return TextButton(
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key: const Key('comment-list-load-more'),
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onPressed: _controller.loadMore,
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child: Text(l10n.loadMore),
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);
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}
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return const SizedBox(height: 8);
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}
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Widget _fakeComposer(AppLocalizations l10n, {required bool signedIn}) {
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return GestureDetector(
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behavior: HitTestBehavior.opaque,
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onTap: _openComposer,
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child: Container(
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key: const Key('comment-input-placeholder'),
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height: _composerHeight,
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padding: const EdgeInsets.only(right: 6),
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decoration: BoxDecoration(
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color: AppColors.commentInput,
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borderRadius: BorderRadius.circular(_composerRadius),
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),
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child: Row(
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children: [
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Expanded(
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child: Align(
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alignment: Alignment.centerLeft,
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child: Padding(
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padding: const EdgeInsets.only(left: 16),
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child: Text(
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signedIn ? l10n.writeComment : l10n.commentLoginHint,
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key: const Key('comment-input-placeholder-label'),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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style: const TextStyle(
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color: AppColors.muted,
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fontSize: 14,
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height: 1,
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),
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),
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),
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),
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),
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SizedBox.square(
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dimension: _sendButtonSize,
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child: IconButton.filled(
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key: const Key('comment-post'),
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tooltip: l10n.postComment,
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padding: EdgeInsets.zero,
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iconSize: 18,
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onPressed: _openComposer,
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icon: const Icon(Icons.send_rounded),
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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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class _CommentPostSuccessOverlay extends StatelessWidget {
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const _CommentPostSuccessOverlay({required this.message});
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final String message;
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@override
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Widget build(BuildContext context) {
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return Positioned.fill(
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child: IgnorePointer(
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child: SafeArea(
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child: Align(
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alignment: const Alignment(0, 0.55),
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child: Semantics(
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liveRegion: true,
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child: Container(
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key: const Key('comment-post-success-snackbar'),
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 10,
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),
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decoration: BoxDecoration(
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color: Colors.black.withValues(alpha: 0.82),
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borderRadius: BorderRadius.circular(8),
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),
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child: Text(
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message,
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textAlign: TextAlign.center,
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style: const TextStyle(color: Colors.white, 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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),
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);
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}
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}
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class _CommentThread extends StatelessWidget {
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const _CommentThread({
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required this.comment,
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required this.controller,
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required this.handlers,
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});
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final DramaComment comment;
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final CommentController controller;
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final CommentInteractionHandlers handlers;
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@override
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Widget build(BuildContext context) {
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final replies = controller.repliesFor(comment.id);
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final expanded = controller.repliesExpanded(comment.id);
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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CommentTile(comment: comment, handlers: handlers),
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if (comment.replyCount > 0 || replies.isNotEmpty)
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Padding(
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padding: const EdgeInsets.only(left: _replyIndent, bottom: 4),
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child: TextButton(
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key: Key('comment-replies-${comment.id}'),
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onPressed: () => _toggleReplies(context),
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style: TextButton.styleFrom(
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foregroundColor: AppColors.muted,
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padding: EdgeInsets.zero,
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minimumSize: const Size(0, 24),
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tapTargetSize: MaterialTapTargetSize.shrinkWrap,
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Container(width: 16, height: 1, color: AppColors.border),
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const SizedBox(width: 8),
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Text(
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expanded
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? AppLocalizations.of(context)!.hideReplies
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: AppLocalizations.of(context)!
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.viewReplies(comment.replyCount),
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style: const TextStyle(
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color: AppColors.muted,
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fontSize: 12,
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fontWeight: FontWeight.w400,
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),
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),
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const SizedBox(width: 4),
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Icon(
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expanded
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? Icons.keyboard_arrow_up_rounded
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: Icons.keyboard_arrow_down_rounded,
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size: 14,
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color: AppColors.muted,
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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 (expanded)
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Padding(
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padding: const EdgeInsets.only(left: _replyIndent),
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child: Column(
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children: [
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if (controller.repliesLoading(comment.id))
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const Padding(
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padding: EdgeInsets.symmetric(vertical: 8),
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child: CircularProgressIndicator(),
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),
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for (final reply in replies)
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CommentTile(
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comment: reply,
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handlers: handlers,
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isReply: true,
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),
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if (controller.repliesHasMore(comment.id))
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TextButton(
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onPressed: () => controller.loadMoreReplies(comment.id),
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child: Text(AppLocalizations.of(context)!.loadMore),
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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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Future<void> _toggleReplies(BuildContext context) async {
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if (controller.repliesExpanded(comment.id)) {
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controller.hideReplies(comment.id);
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return;
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}
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await controller.loadReplies(comment.id);
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}
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}
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