413 lines
16 KiB
Dart
413 lines
16 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:intl/intl.dart';
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import 'package:gwid/models/chat.dart';
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import 'package:gwid/models/message.dart';
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import 'package:gwid/models/contact.dart';
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import 'package:gwid/models/profile.dart';
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import 'package:gwid/api_service.dart';
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import 'package:gwid/widgets/chat_message_bubble.dart';
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import 'package:gwid/chat_screen.dart';
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class MessagePreviewDialog {
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static String _formatTimestamp(int timestamp) {
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final dt = DateTime.fromMillisecondsSinceEpoch(timestamp);
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final now = DateTime.now();
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if (now.day == dt.day && now.month == dt.month && now.year == dt.year) {
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return DateFormat('HH:mm', 'ru').format(dt);
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} else {
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final yesterday = now.subtract(const Duration(days: 1));
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if (dt.day == yesterday.day &&
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dt.month == yesterday.month &&
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dt.year == yesterday.year) {
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return 'Вчера';
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} else {
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return DateFormat('d MMM', 'ru').format(dt);
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}
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}
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}
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static bool _isSavedMessages(Chat chat) {
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return chat.id == 0;
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}
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static bool _isGroupChat(Chat chat) {
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return chat.type == 'CHAT' || chat.participantIds.length > 2;
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}
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static bool _isSameDay(DateTime date1, DateTime date2) {
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return date1.year == date2.year &&
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date1.month == date2.month &&
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date1.day == date2.day;
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}
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static bool _isMessageGrouped(
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Message currentMessage,
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Message? previousMessage,
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) {
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if (previousMessage == null) return false;
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final currentTime = DateTime.fromMillisecondsSinceEpoch(
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currentMessage.time,
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);
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final previousTime = DateTime.fromMillisecondsSinceEpoch(
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previousMessage.time,
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);
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final timeDifference = currentTime.difference(previousTime).inMinutes;
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return currentMessage.senderId == previousMessage.senderId &&
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timeDifference <= 5;
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}
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static String _formatDateSeparator(DateTime date) {
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final now = DateTime.now();
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if (_isSameDay(date, now)) {
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return 'Сегодня';
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} else {
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final yesterday = now.subtract(const Duration(days: 1));
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if (_isSameDay(date, yesterday)) {
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return 'Вчера';
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} else {
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return DateFormat('d MMM yyyy', 'ru').format(date);
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}
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}
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}
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static String _getChatTitle(Chat chat, Map<int, Contact> contacts) {
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final bool isSavedMessages = _isSavedMessages(chat);
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final bool isGroupChat = _isGroupChat(chat);
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final bool isChannel = chat.type == 'CHANNEL';
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if (isSavedMessages) {
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return "Избранное";
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} else if (isChannel) {
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return chat.title ?? "Канал";
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} else if (isGroupChat) {
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return chat.title?.isNotEmpty == true ? chat.title! : "Группа";
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} else {
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final myId = chat.ownerId;
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final otherParticipantId = chat.participantIds.firstWhere(
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(id) => id != myId,
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orElse: () => myId,
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);
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final contact = contacts[otherParticipantId];
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return contact?.name ?? "Неизвестный чат";
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}
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}
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static Future<void> show(
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BuildContext context,
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Chat chat,
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Map<int, Contact> contacts,
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Profile? myProfile,
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VoidCallback? onClose,
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Widget Function(BuildContext)? menuBuilder,
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) async {
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final colors = Theme.of(context).colorScheme;
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List<Message> messages = [];
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bool isLoading = true;
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try {
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messages = await ApiService.instance.getMessageHistory(
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chat.id,
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force: false,
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);
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if (messages.length > 10) {
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messages = messages.sublist(messages.length - 10);
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}
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} catch (e) {
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print('Ошибка загрузки сообщений для предпросмотра: $e');
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} finally {
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isLoading = false;
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}
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final Set<int> senderIds = messages.map((m) => m.senderId).toSet();
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senderIds.remove(0);
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final Set<int> forwardedSenderIds = {};
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for (final message in messages) {
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if (message.isForwarded && message.link != null) {
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final link = message.link;
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if (link is Map<String, dynamic>) {
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final chatName = link['chatName'] as String?;
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if (chatName == null) {
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final forwardedMessage = link['message'] as Map<String, dynamic>?;
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final originalSenderId = forwardedMessage?['sender'] as int?;
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if (originalSenderId != null) {
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forwardedSenderIds.add(originalSenderId);
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}
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}
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}
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}
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}
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final allIdsToFetch = {
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...senderIds,
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...forwardedSenderIds,
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}.where((id) => !contacts.containsKey(id)).toList();
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if (allIdsToFetch.isNotEmpty) {
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try {
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final newContacts = await ApiService.instance.fetchContactsByIds(
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allIdsToFetch,
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);
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for (final contact in newContacts) {
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contacts[contact.id] = contact;
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}
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} catch (e) {
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print('Ошибка загрузки контактов для предпросмотра: $e');
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}
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}
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final chatTitle = _getChatTitle(chat, contacts);
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final bool isGroupChat = _isGroupChat(chat);
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final bool isChannel = chat.type == 'CHANNEL';
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final myId = myProfile?.id ?? chat.ownerId;
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if (!context.mounted) return;
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List<ChatItem> chatItems = [];
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for (int i = 0; i < messages.length; i++) {
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final currentMessage = messages[i];
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final previousMessage = (i > 0) ? messages[i - 1] : null;
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final currentDate = DateTime.fromMillisecondsSinceEpoch(
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currentMessage.time,
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).toLocal();
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final previousDate = previousMessage != null
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? DateTime.fromMillisecondsSinceEpoch(previousMessage.time).toLocal()
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: null;
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if (previousMessage == null || !_isSameDay(currentDate, previousDate!)) {
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chatItems.add(DateSeparatorItem(currentDate));
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}
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final isGrouped = _isMessageGrouped(currentMessage, previousMessage);
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final isFirstInGroup = previousMessage == null || !isGrouped;
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final isLastInGroup =
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i == messages.length - 1 ||
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!_isMessageGrouped(messages[i + 1], currentMessage);
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chatItems.add(
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MessageItem(
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currentMessage,
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isFirstInGroup: isFirstInGroup,
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isLastInGroup: isLastInGroup,
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isGrouped: isGrouped,
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),
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);
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}
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await showModalBottomSheet(
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context: context,
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isScrollControlled: true,
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backgroundColor: Colors.transparent,
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builder: (context) {
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return DraggableScrollableSheet(
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initialChildSize: 0.75,
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minChildSize: 0.5,
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maxChildSize: 0.9,
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builder: (context, scrollController) {
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return Container(
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decoration: BoxDecoration(
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color: colors.surface,
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borderRadius: const BorderRadius.vertical(
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top: Radius.circular(20),
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),
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),
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child: Column(
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children: [
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Container(
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margin: const EdgeInsets.only(top: 8, bottom: 8),
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width: 40,
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height: 4,
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decoration: BoxDecoration(
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color: colors.onSurfaceVariant.withOpacity(0.4),
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borderRadius: BorderRadius.circular(2),
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),
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),
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 12,
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),
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decoration: BoxDecoration(
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border: Border(
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bottom: BorderSide(
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color: colors.outline.withOpacity(0.2),
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width: 1,
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),
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),
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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: Text(
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chatTitle,
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.w600,
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color: colors.onSurface,
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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),
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IconButton(
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icon: const Icon(Icons.close),
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color: colors.onSurfaceVariant,
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padding: EdgeInsets.zero,
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constraints: const BoxConstraints(),
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onPressed: () {
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Navigator.of(context).pop();
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onClose?.call();
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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(
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child: isLoading
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? const Center(child: CircularProgressIndicator())
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: messages.isEmpty
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? Center(
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child: Text(
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'Нет сообщений',
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style: TextStyle(
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color: colors.onSurfaceVariant,
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fontSize: 14,
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),
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),
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)
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: ListView.builder(
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controller: scrollController,
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reverse: true,
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padding: const EdgeInsets.symmetric(
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horizontal: 8,
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vertical: 8,
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),
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itemCount: chatItems.length,
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itemBuilder: (context, index) {
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final mappedIndex = chatItems.length - 1 - index;
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final item = chatItems[mappedIndex];
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if (item is DateSeparatorItem) {
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return Padding(
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padding: const EdgeInsets.symmetric(
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vertical: 8,
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horizontal: 16,
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),
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child: Center(
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child: Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 12,
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vertical: 4,
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),
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decoration: BoxDecoration(
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color: colors.surfaceVariant,
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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_formatDateSeparator(item.date),
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style: TextStyle(
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fontSize: 12,
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color: colors.onSurfaceVariant,
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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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if (item is MessageItem) {
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final message = item.message;
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final isMe = message.senderId == myId;
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final senderContact =
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contacts[message.senderId];
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final senderName = isMe
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? 'Вы'
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: (senderContact?.name ?? 'Неизвестный');
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String? forwardedFrom;
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String? forwardedFromAvatarUrl;
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if (message.isForwarded) {
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final link = message.link;
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if (link is Map<String, dynamic>) {
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final chatName =
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link['chatName'] as String?;
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final chatIconUrl =
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link['chatIconUrl'] as String?;
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if (chatName != null) {
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forwardedFrom = chatName;
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forwardedFromAvatarUrl = chatIconUrl;
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} else {
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final forwardedMessage =
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link['message']
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as Map<String, dynamic>?;
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final originalSenderId =
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forwardedMessage?['sender'] as int?;
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if (originalSenderId != null) {
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final originalSenderContact =
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contacts[originalSenderId];
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forwardedFrom =
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originalSenderContact?.name ??
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'Участник $originalSenderId';
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forwardedFromAvatarUrl =
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originalSenderContact?.photoBaseUrl;
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}
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}
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}
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}
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return ChatMessageBubble(
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message: message,
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isMe: isMe,
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readStatus: null,
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deferImageLoading: true,
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myUserId: myId,
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chatId: chat.id,
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onReply: null,
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onEdit: null,
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canEditMessage: null,
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onDeleteForMe: null,
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onDeleteForAll: null,
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onReaction: null,
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onRemoveReaction: null,
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isGroupChat: isGroupChat,
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isChannel: isChannel,
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senderName: senderName,
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forwardedFrom: forwardedFrom,
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forwardedFromAvatarUrl:
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forwardedFromAvatarUrl,
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contactDetailsCache: contacts,
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onReplyTap: null,
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useAutoReplyColor: false,
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customReplyColor: null,
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isFirstInGroup: item.isFirstInGroup,
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isLastInGroup: item.isLastInGroup,
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isGrouped: item.isGrouped,
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avatarVerticalOffset: -8.0,
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);
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}
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return const SizedBox.shrink();
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},
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),
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),
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if (menuBuilder != null) ...[
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Divider(height: 1, color: colors.outline.withOpacity(0.2)),
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menuBuilder(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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