316 lines
11 KiB
Dart
316 lines
11 KiB
Dart
import 'package:collection/collection.dart'
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show IterableExtension, ListEquality;
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import 'package:flutter/material.dart';
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import 'package:stream_chat_flutter/src/extension.dart';
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import 'package:stream_chat_flutter/stream_chat_flutter.dart';
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/// {@template channel_preview}
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/// 
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/// 
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///
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/// It shows the current [Channel] preview.
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///
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/// The widget uses a [StreamBuilder] to render the channel information
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/// image as soon as it updates.
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///
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/// Usually you don't use this widget as it's the default channel preview
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/// used by [StreamChannelListView].
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///
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/// The widget renders the ui based on the first ancestor of type
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/// [StreamChatTheme].
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/// Modify it to change the widget appearance.
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/// {@endtemplate}
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@Deprecated("Use 'StreamChannelListTile' instead")
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class ChannelPreview extends StatelessWidget {
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/// Constructor for creating [ChannelPreview]
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const ChannelPreview({
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required this.channel,
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super.key,
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this.onTap,
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this.onLongPress,
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this.onImageTap,
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this.title,
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this.subtitle,
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this.leading,
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this.sendingIndicator,
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this.trailing,
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});
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/// Function called when tapping this widget
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final void Function(Channel)? onTap;
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/// Function called when long pressing this widget
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final void Function(Channel)? onLongPress;
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/// Channel displayed
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final Channel channel;
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/// The function called when the image is tapped
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final VoidCallback? onImageTap;
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/// Widget rendering the title
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final Widget? title;
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/// Widget rendering the subtitle
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final Widget? subtitle;
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/// Widget rendering the leading element, by default
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/// it shows the [StreamChannelAvatar]
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final Widget? leading;
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/// Widget rendering the trailing element,
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/// by default it shows the last message date
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final Widget? trailing;
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/// Widget rendering the sending indicator,
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/// by default it uses the [StreamSendingIndicator] widget
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final Widget? sendingIndicator;
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@override
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Widget build(BuildContext context) {
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final channelPreviewTheme = ChannelPreviewTheme.of(context);
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final streamChatState = StreamChat.of(context);
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return BetterStreamBuilder<bool>(
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stream: channel.isMutedStream,
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initialData: channel.isMuted,
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builder: (context, data) => AnimatedOpacity(
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opacity: data ? 0.5 : 1,
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duration: const Duration(milliseconds: 300),
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child: ListTile(
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visualDensity: VisualDensity.compact,
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 8,
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),
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onTap: () => onTap?.call(channel),
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onLongPress: () => onLongPress?.call(channel),
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leading: leading ??
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StreamChannelAvatar(
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channel: channel,
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onTap: onImageTap,
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),
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title: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: <Widget>[
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Flexible(
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child: title ??
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StreamChannelName(
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channel: channel,
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textStyle: channelPreviewTheme.titleStyle,
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),
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),
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BetterStreamBuilder<List<Member>>(
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stream: channel.state?.membersStream,
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initialData: channel.state?.members,
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comparator: const ListEquality().equals,
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builder: (context, members) {
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if (members.isEmpty ||
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!members.any((Member e) =>
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e.user!.id == channel.client.state.currentUser?.id)) {
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return const SizedBox();
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}
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return StreamUnreadIndicator(
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cid: channel.cid,
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);
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},
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),
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],
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),
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subtitle: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: <Widget>[
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Flexible(child: subtitle ?? _buildSubtitle(context)),
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sendingIndicator ??
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Builder(
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builder: (context) {
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final lastMessage =
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channel.state?.messages.lastWhereOrNull(
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(m) => !m.isDeleted && !m.shadowed,
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);
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if (lastMessage?.user?.id ==
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streamChatState.currentUser?.id) {
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return Padding(
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padding: const EdgeInsets.only(right: 4),
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child: BetterStreamBuilder<List<Read>>(
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stream: channel.state?.readStream,
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initialData: channel.state?.read,
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builder: (context, data) {
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final readList = data.where((it) =>
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it.user.id !=
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channel.client.state.currentUser?.id &&
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(it.lastRead
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.isAfter(lastMessage!.createdAt) ||
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it.lastRead.isAtSameMomentAs(
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lastMessage.createdAt,
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)));
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final isMessageRead = readList.length >=
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(channel.memberCount ?? 0) - 1;
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return StreamSendingIndicator(
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message: lastMessage!,
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size: channelPreviewTheme.indicatorIconSize,
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isMessageRead: isMessageRead,
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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 const SizedBox();
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},
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),
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trailing ?? _buildDate(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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Widget _buildDate(BuildContext context) => BetterStreamBuilder<DateTime>(
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stream: channel.lastMessageAtStream,
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initialData: channel.lastMessageAt,
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builder: (context, data) {
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final lastMessageAt = data.toLocal();
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String stringDate;
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final now = DateTime.now();
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final startOfDay = DateTime(now.year, now.month, now.day);
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if (lastMessageAt.millisecondsSinceEpoch >=
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startOfDay.millisecondsSinceEpoch) {
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stringDate = Jiffy(lastMessageAt.toLocal()).jm;
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} else if (lastMessageAt.millisecondsSinceEpoch >=
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startOfDay
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.subtract(const Duration(days: 1))
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.millisecondsSinceEpoch) {
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stringDate = context.translations.yesterdayLabel;
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} else if (startOfDay.difference(lastMessageAt).inDays < 7) {
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stringDate = Jiffy(lastMessageAt.toLocal()).EEEE;
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} else {
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stringDate = Jiffy(lastMessageAt.toLocal()).yMd;
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}
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return Text(
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stringDate,
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style: ChannelPreviewTheme.of(context).lastMessageAtStyle,
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);
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},
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);
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Widget _buildSubtitle(BuildContext context) {
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final channelPreviewTheme = ChannelPreviewTheme.of(context);
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if (channel.isMuted) {
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return Row(
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crossAxisAlignment: CrossAxisAlignment.end,
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children: <Widget>[
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StreamSvgIcon.mute(
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size: 16,
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),
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Text(
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' ${context.translations.channelIsMutedText}',
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style: channelPreviewTheme.subtitleStyle,
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),
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],
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);
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}
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return StreamTypingIndicator(
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channel: channel,
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alternativeWidget: _buildLastMessage(context),
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style: channelPreviewTheme.subtitleStyle,
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);
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}
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Widget _buildLastMessage(BuildContext context) => Align(
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alignment: Alignment.centerLeft,
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child: BetterStreamBuilder<List<Message>>(
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stream: channel.state!.messagesStream,
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initialData: channel.state!.messages,
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builder: (context, data) {
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final lastMessage =
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data.lastWhereOrNull((m) => !m.shadowed && !m.isDeleted);
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if (lastMessage == null) {
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return const SizedBox();
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}
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var text = lastMessage.text;
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final parts = <String>[
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...lastMessage.attachments.map((e) {
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if (e.type == 'image') {
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return '📷';
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} else if (e.type == 'video') {
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return '🎬';
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} else if (e.type == 'giphy') {
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return '[GIF]';
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}
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return e == lastMessage.attachments.last
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? (e.title ?? 'File')
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: '${e.title ?? 'File'} , ';
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}),
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lastMessage.text ?? '',
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];
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text = parts.join(' ');
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final channelPreviewTheme = ChannelPreviewTheme.of(context);
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return Text.rich(
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_getDisplayText(
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text,
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lastMessage.mentionedUsers,
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lastMessage.attachments,
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channelPreviewTheme.subtitleStyle?.copyWith(
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color: channelPreviewTheme.subtitleStyle?.color,
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fontStyle: (lastMessage.isSystem || lastMessage.isDeleted)
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? FontStyle.italic
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: FontStyle.normal,
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),
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channelPreviewTheme.subtitleStyle?.copyWith(
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color: channelPreviewTheme.subtitleStyle?.color,
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fontStyle: (lastMessage.isSystem || lastMessage.isDeleted)
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? FontStyle.italic
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: FontStyle.normal,
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fontWeight: FontWeight.bold,
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),
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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textAlign: TextAlign.start,
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);
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},
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),
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);
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TextSpan _getDisplayText(
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String text,
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List<User> mentions,
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List<Attachment> attachments,
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TextStyle? normalTextStyle,
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TextStyle? mentionsTextStyle,
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) {
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final textList = text.split(' ');
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final resList = <TextSpan>[];
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for (final e in textList) {
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if (mentions.isNotEmpty &&
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mentions.any((element) => '@${element.name}' == e)) {
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resList.add(TextSpan(
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text: '$e ',
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style: mentionsTextStyle,
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));
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} else if (attachments.isNotEmpty &&
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attachments
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.where((e) => e.title != null)
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.any((element) => element.title == e)) {
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resList.add(TextSpan(
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text: '$e ',
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style: normalTextStyle?.copyWith(fontStyle: FontStyle.italic),
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));
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} else {
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resList.add(TextSpan(
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text: e == textList.last ? e : '$e ',
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style: normalTextStyle,
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));
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}
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}
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return TextSpan(children: resList);
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}
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}
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