SimpleCloudNotifier/flutter/lib/pages/message_list/message_list.dart

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import 'package:flutter/material.dart';
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import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:provider/provider.dart';
import 'package:simplecloudnotifier/api/api_client.dart';
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import 'package:simplecloudnotifier/models/channel.dart';
import 'package:simplecloudnotifier/models/message.dart';
import 'package:simplecloudnotifier/pages/message_view/message_view.dart';
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import 'package:simplecloudnotifier/state/application_log.dart';
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import 'package:simplecloudnotifier/state/user_account.dart';
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import 'package:simplecloudnotifier/pages/message_list/message_list_item.dart';
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class MessageListPage extends StatefulWidget {
const MessageListPage({super.key});
@override
State<MessageListPage> createState() => _MessageListPageState();
}
class _MessageListPageState extends State<MessageListPage> {
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static const _pageSize = 128;
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final PagingController<String, Message> _pagingController = PagingController(firstPageKey: '@start');
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Map<String, Channel>? _channels = null;
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@override
void initState() {
_pagingController.addPageRequestListener((pageKey) {
_fetchPage(pageKey);
});
super.initState();
}
@override
void dispose() {
_pagingController.dispose();
super.dispose();
}
Future<void> _fetchPage(String thisPageToken) async {
final acc = Provider.of<UserAccount>(context, listen: false);
if (acc.auth == null) {
_pagingController.error = 'Not logged in';
return;
}
try {
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if (_channels == null) {
final channels = await APIClient.getChannelList(acc.auth!, ChannelSelector.allAny);
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_channels = <String, ChannelWithSubscription>{for (var v in channels) v.channelID: v};
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}
final (npt, newItems) = await APIClient.getMessageList(acc.auth!, thisPageToken, _pageSize);
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if (npt == '@end') {
_pagingController.appendLastPage(newItems);
} else {
_pagingController.appendPage(newItems, npt);
}
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} catch (exc, trace) {
_pagingController.error = exc.toString();
ApplicationLog.error('Failed to list messages: ' + exc.toString(), trace: trace);
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}
}
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@override
Widget build(BuildContext context) {
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return Padding(
padding: EdgeInsets.fromLTRB(8, 4, 8, 4),
child: PagedListView<String, Message>(
pagingController: _pagingController,
builderDelegate: PagedChildBuilderDelegate<Message>(
itemBuilder: (context, item, index) => MessageListItem(
message: item,
allChannels: _channels ?? {},
onPressed: () {
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Navigator.push(context, MaterialPageRoute<MessageViewPage>(builder: (context) => MessageViewPage(message: item)));
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},
),
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),
),
);
}
}