Solian/lib/widgets/chat/chat_event_list.dart

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Dart
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import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:solian/controllers/chat_events_controller.dart';
import 'package:solian/models/channel.dart';
import 'package:solian/models/event.dart';
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import 'package:solian/providers/last_read.dart';
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import 'package:solian/widgets/chat/chat_event.dart';
import 'package:solian/widgets/chat/chat_event_action.dart';
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import 'package:very_good_infinite_list/very_good_infinite_list.dart';
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class ChatEventList extends StatelessWidget {
final String scope;
final Channel channel;
final ChatEventController chatController;
final Function(Event) onEdit;
final Function(Event) onReply;
const ChatEventList({
super.key,
this.scope = 'global',
required this.channel,
required this.chatController,
required this.onEdit,
required this.onReply,
});
bool _checkMessageMergeable(Event? a, Event? b) {
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if (a == null || b == null) return false;
if (a.sender.account.id != b.sender.account.id) return false;
return a.createdAt.difference(b.createdAt).inMinutes <= 3;
}
@override
Widget build(BuildContext context) {
return CustomScrollView(
reverse: true,
slivers: [
Obx(() {
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return SliverInfiniteList(
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key: Key('chat-history#${channel.id}'),
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isLoading: chatController.isLoading.value,
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itemCount: chatController.currentEvents.length,
itemBuilder: (context, index) {
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Get.find<LastReadProvider>().messagesLastReadAt =
chatController.currentEvents[index].id;
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bool isMerged = false, hasMerged = false;
if (index > 0) {
hasMerged = _checkMessageMergeable(
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chatController.currentEvents[index - 1].data,
chatController.currentEvents[index].data,
);
}
if (index + 1 < chatController.currentEvents.length) {
isMerged = _checkMessageMergeable(
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chatController.currentEvents[index].data,
chatController.currentEvents[index + 1].data,
);
}
final item = chatController.currentEvents[index].data;
return GestureDetector(
behavior: HitTestBehavior.opaque,
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child: ChatEvent(
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key: Key('m${item!.uuid}'),
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item: item,
isMerged: isMerged,
chatController: chatController,
).paddingOnly(
top: !isMerged ? 8 : 0,
bottom: !hasMerged ? 8 : 0,
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),
onLongPress: () {
showModalBottomSheet(
useRootNavigator: true,
context: context,
builder: (context) => ChatEventAction(
channel: channel,
realm: channel.realm,
item: item,
onEdit: () {
onEdit(item);
},
onReply: () {
onReply(item);
},
),
);
},
);
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},
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onFetchData: () {
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if (chatController.currentEvents.length <
chatController.totalEvents.value) {
chatController.loadEvents(
chatController.channel!,
chatController.scope!,
);
}
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},
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);
}),
],
);
}
}