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Prisma/lib/features/collections/presentation/collections_screen.dart
T
RarDog 5b2c8eb53e
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fix(perf): memory optimization, prevent OOM on mobile, and completely disable mouse wheel zoom
2026-09-05 18:09:58 +03:00

354 lines
13 KiB
Dart

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../app/app.dart';
import '../../../backend/backend.dart';
import '../../../shared/widgets/adaptive_scaffold.dart';
import '../../../shared/widgets/confirm_dialog.dart';
import '../../../shared/widgets/error_view.dart';
import 'collection_form_dialog.dart';
import 'collections_controller.dart';
class CollectionsScreen extends ConsumerWidget {
const CollectionsScreen({super.key});
@override
Widget build(BuildContext context, WidgetRef ref) {
final collections = ref.watch(collectionsControllerProvider);
final settings =
ref.watch(appSettingsProvider).value ?? AppSettings.defaults;
final isRu = settings.languageCode == 'ru';
return AdaptiveScaffold(
title: isRu ? 'Коллекции' : 'Collections',
actions: [
IconButton(
tooltip: isRu ? 'Новая коллекция' : 'New collection',
icon: const Icon(Icons.add_rounded),
onPressed: () => showCollectionFormDialog(context, ref),
),
],
body: collections.when(
loading: () => const Center(child: CircularProgressIndicator()),
error: (error, _) => ErrorView(message: error.toString()),
data: (items) {
if (items.isEmpty) {
return Center(
child: Padding(
padding: const EdgeInsets.all(24),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
padding: const EdgeInsets.all(20),
decoration: BoxDecoration(
color: Theme.of(context)
.colorScheme
.primaryContainer
.withValues(alpha: 0.3),
shape: BoxShape.circle,
),
child: Icon(
Icons.collections_bookmark_rounded,
size: 56,
color: Theme.of(context).colorScheme.primary,
),
),
const SizedBox(height: 16),
Text(
isRu ? 'Нет коллекций' : 'No collections yet',
style: Theme.of(context).textTheme.titleLarge?.copyWith(
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 8),
Text(
isRu
? 'Создавайте тематические коллекции и объединяйте в них понравившиеся работы'
: 'Create themed collections and organize your favorite posts',
textAlign: TextAlign.center,
style: Theme.of(context).textTheme.bodyMedium?.copyWith(
color: Theme.of(context)
.colorScheme
.onSurfaceVariant,
),
),
const SizedBox(height: 24),
FilledButton.icon(
onPressed: () => showCollectionFormDialog(context, ref),
icon: const Icon(Icons.add_rounded),
label: Text(
isRu ? 'Создать коллекцию' : 'Create collection',
),
),
],
),
),
);
}
return GridView.builder(
padding: const EdgeInsets.all(16),
gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: 320,
mainAxisSpacing: 14,
crossAxisSpacing: 14,
childAspectRatio: 0.88,
),
itemCount: items.length,
itemBuilder: (context, index) {
final item = items[index];
return _CollectionCard(
collection: item,
isRu: isRu,
onOpen: () => context.go('/collections/${item.id}'),
onEdit: () => showCollectionFormDialog(
context,
ref,
collection: item,
),
onDelete: () async {
final ok = await showConfirmDialog(
context,
title: isRu ? 'Удалить коллекцию' : 'Delete collection',
message: isRu
? 'Удалить подборку "${item.name}"?'
: 'Remove "${item.name}"?',
);
if (ok) {
await ref
.read(collectionsControllerProvider.notifier)
.delete(item.id);
}
},
);
},
);
},
),
);
}
}
class _CollectionCard extends ConsumerWidget {
const _CollectionCard({
required this.collection,
required this.isRu,
required this.onOpen,
required this.onEdit,
required this.onDelete,
});
final Collection collection;
final bool isRu;
final VoidCallback onOpen;
final VoidCallback onEdit;
final VoidCallback onDelete;
@override
Widget build(BuildContext context, WidgetRef ref) {
final scheme = Theme.of(context).colorScheme;
final postsAsync = ref.watch(collectionPostsProvider(collection.id));
final posts = postsAsync.value ?? const <Post>[];
final previewUrls = posts
.map((p) => MediaUrlSelector.preview(p).firstOrNull)
.whereType<String>()
.take(4)
.toList();
return Card(
elevation: 0,
color: scheme.surfaceContainerLow,
clipBehavior: Clip.antiAlias,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18),
side: BorderSide(
color: scheme.outlineVariant.withValues(alpha: 0.3),
),
),
child: InkWell(
onTap: onOpen,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Cover Collage (2x2 or Hero)
Expanded(
child: Stack(
fit: StackFit.expand,
children: [
_buildCoverMosaic(previewUrls, scheme),
// Glass count badge
Positioned(
bottom: 8,
right: 8,
child: Container(
padding: const EdgeInsets.symmetric(
horizontal: 8,
vertical: 4,
),
decoration: BoxDecoration(
color: Colors.black.withValues(alpha: 0.6),
borderRadius: BorderRadius.circular(8),
),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(
Icons.photo_library_outlined,
size: 12,
color: Colors.white,
),
const SizedBox(width: 4),
Text(
'${posts.length}',
style: const TextStyle(
color: Colors.white,
fontSize: 11,
fontWeight: FontWeight.w600,
),
),
],
),
),
),
],
),
),
// Info Row
Padding(
padding: const EdgeInsets.fromLTRB(12, 10, 8, 10),
child: Row(
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
collection.name,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: Theme.of(context).textTheme.titleSmall?.copyWith(
fontWeight: FontWeight.bold,
),
),
if (collection.description != null &&
collection.description!.isNotEmpty) ...[
const SizedBox(height: 2),
Text(
collection.description!,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: Theme.of(context).textTheme.bodySmall?.copyWith(
color: scheme.onSurfaceVariant,
),
),
],
],
),
),
PopupMenuButton<String>(
tooltip: isRu ? 'Действия' : 'Actions',
icon: Icon(
Icons.more_vert_rounded,
size: 20,
color: scheme.onSurfaceVariant,
),
padding: EdgeInsets.zero,
onSelected: (value) {
if (value == 'edit') onEdit();
if (value == 'delete') onDelete();
},
itemBuilder: (context) => [
PopupMenuItem(
value: 'edit',
child: ListTile(
dense: true,
leading: const Icon(Icons.edit_rounded, size: 20),
title: Text(isRu ? 'Редактировать' : 'Edit'),
),
),
PopupMenuItem(
value: 'delete',
child: ListTile(
dense: true,
leading: const Icon(Icons.delete_rounded, size: 20),
title: Text(isRu ? 'Удалить' : 'Delete'),
),
),
],
),
],
),
),
],
),
),
);
}
Widget _buildCoverMosaic(List<String> urls, ColorScheme scheme) {
if (urls.isEmpty) {
return Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
scheme.primaryContainer.withValues(alpha: 0.6),
scheme.tertiaryContainer.withValues(alpha: 0.6),
],
begin: Alignment.topLeft,
end: Alignment.bottomRight,
),
),
child: Center(
child: Icon(
Icons.collections_bookmark_rounded,
size: 40,
color: scheme.primary,
),
),
);
}
if (urls.length == 1) {
return CachedNetworkImage(
imageUrl: urls[0],
memCacheWidth: 260,
memCacheHeight: 260,
fit: BoxFit.cover,
placeholder: (_, __) => Container(color: scheme.surfaceContainerHighest),
errorWidget: (_, __, ___) => Container(
color: scheme.surfaceContainerHighest,
child: const Icon(Icons.broken_image_rounded),
),
);
}
// Mosaic grid (up to 4)
return GridView.count(
crossAxisCount: 2,
padding: EdgeInsets.zero,
physics: const NeverScrollableScrollPhysics(),
children: [
for (int i = 0; i < 4; i++)
if (i < urls.length)
CachedNetworkImage(
imageUrl: urls[i],
memCacheWidth: 200,
memCacheHeight: 200,
fit: BoxFit.cover,
placeholder: (_, __) =>
Container(color: scheme.surfaceContainerHighest),
errorWidget: (_, __, ___) => Container(
color: scheme.surfaceContainerHighest,
child: const Icon(Icons.image_not_supported_rounded, size: 16),
),
)
else
Container(color: scheme.surfaceContainerHighest),
],
);
}
}