lemmur-app-android/lib/pages/communities_tab.dart

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import 'dart:async';
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
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import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:fuzzy/fuzzy.dart';
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import 'package:lemmy_api_client/v2.dart';
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import '../hooks/delayed_loading.dart';
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import '../hooks/refreshable.dart';
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import '../hooks/stores.dart';
import '../util/extensions/api.dart';
import '../util/extensions/iterators.dart';
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import '../util/goto.dart';
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import '../util/text_color.dart';
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import '../widgets/avatar.dart';
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/// List of subscribed communities per instance
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class CommunitiesTab extends HookWidget {
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const CommunitiesTab();
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@override
Widget build(BuildContext context) {
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final theme = Theme.of(context);
final filterController = useListenable(useTextEditingController());
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final accountsStore = useAccountsStore();
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final amountOfDisplayInstances = accountsStore.loggedInInstances.length;
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final isCollapsed = useState(List.filled(amountOfDisplayInstances, false));
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if (amountOfDisplayInstances != isCollapsed.value.length) {
isCollapsed.value = List.filled(amountOfDisplayInstances, false);
}
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getInstances() {
final futures = accountsStore.loggedInInstances
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.map(
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(instanceHost) => LemmyApiV2(instanceHost)
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.run(const GetSite())
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.then((e) => e.siteView.site),
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)
.toList();
return Future.wait(futures);
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}
getCommunities() {
final futures = accountsStore.loggedInInstances
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.map(
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(instanceHost) => LemmyApiV2(instanceHost)
.run(GetUserDetails(
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sort: SortType.active,
savedOnly: false,
userId:
accountsStore.defaultTokenFor(instanceHost).payload.id,
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auth: accountsStore.defaultTokenFor(instanceHost).raw,
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))
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.then((e) => e.follows),
)
.toList();
return Future.wait(futures);
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}
final _loggedInAccounts = accountsStore.loggedInInstances
.map((instanceHost) =>
'$instanceHost${accountsStore.defaultUsernameFor(instanceHost)}')
.toList();
final instancesRefreshable =
useRefreshable(getInstances, _loggedInAccounts);
final communitiesRefreshable =
useRefreshable(getCommunities, _loggedInAccounts);
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if (communitiesRefreshable.snapshot.hasError ||
instancesRefreshable.snapshot.hasError) {
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return Scaffold(
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appBar: AppBar(),
body: Center(
child: Row(
children: [
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const Icon(Icons.error),
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Padding(
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padding: const EdgeInsets.all(8),
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child: Text(
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communitiesRefreshable.snapshot.error?.toString() ??
instancesRefreshable.snapshot.error?.toString(),
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),
)
],
),
),
);
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} else if (!communitiesRefreshable.snapshot.hasData ||
!instancesRefreshable.snapshot.hasData) {
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return Scaffold(
appBar: AppBar(),
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body: const Center(
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child: CircularProgressIndicator(),
),
);
}
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refresh() async {
await HapticFeedback.mediumImpact();
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try {
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await Future.wait([
instancesRefreshable.refresh(),
communitiesRefreshable.refresh(),
]);
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// ignore: avoid_catches_without_on_clauses
} catch (e) {
Scaffold.of(context)
.showSnackBar(SnackBar(content: Text(e.toString())));
}
}
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final instances = instancesRefreshable.snapshot.data;
final communities = communitiesRefreshable.snapshot.data
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..forEach((e) =>
e.sort((a, b) => a.community.name.compareTo(b.community.name)));
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final filterIcon = () {
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if (filterController.text.isEmpty) {
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return const Icon(Icons.filter_list);
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}
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return IconButton(
onPressed: () {
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filterController.clear();
primaryFocus.unfocus();
},
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icon: const Icon(Icons.clear),
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);
}();
filterCommunities(List<CommunityFollowerView> comm) {
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final matches = Fuzzy(
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comm.map((e) => e.community.name).toList(),
options: FuzzyOptions(threshold: 0.5),
).search(filterController.text).map((e) => e.item);
return matches
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.map((match) => comm.firstWhere((e) => e.community.name == match));
}
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toggleCollapse(int i) => isCollapsed.value =
isCollapsed.value.mapWithIndex((e, j) => j == i ? !e : e).toList();
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return Scaffold(
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appBar: AppBar(
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actions: [
IconButton(
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icon: const Icon(Icons.style),
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onPressed: () {}, // TODO: change styles?
),
],
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title: TextField(
controller: filterController,
textAlign: TextAlign.center,
decoration: InputDecoration(
suffixIcon: filterIcon,
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hintText: 'Filter', // TODO: hint with an filter icon
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),
),
),
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body: RefreshIndicator(
onRefresh: refresh,
child: amountOfDisplayInstances == 0
? const Center(
child: Text('You are not logged in to any instances'),
)
: ListView(
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children: [
for (var i = 0; i < amountOfDisplayInstances; i++)
Column(
children: [
ListTile(
onTap: () => goToInstance(context,
accountsStore.loggedInInstances.elementAt(i)),
onLongPress: () => toggleCollapse(i),
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leading: Avatar(url: instances[i].icon),
title: Text(
instances[i].name,
style: theme.textTheme.headline6,
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),
trailing: IconButton(
icon: Icon(isCollapsed.value[i]
? Icons.keyboard_arrow_up
: Icons.keyboard_arrow_down),
onPressed: () => toggleCollapse(i),
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),
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),
if (!isCollapsed.value[i])
for (final comm in filterCommunities(communities[i]))
Padding(
padding: const EdgeInsets.only(left: 17),
child: ListTile(
onTap: () => goToCommunity.byId(
context,
accountsStore.loggedInInstances
.elementAt(i),
comm.community.id),
dense: true,
leading: VerticalDivider(
color: theme.hintColor,
),
title: Row(
children: [
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Avatar(
radius: 15,
url: comm.community.icon,
),
const SizedBox(width: 10),
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Text(comm.community.originDisplayName),
],
),
trailing: _CommunitySubscribeToggle(
key: ValueKey(comm.community.id),
instanceHost: comm.instanceHost,
communityId: comm.community.id,
),
),
)
],
),
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],
),
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),
);
}
}
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class _CommunitySubscribeToggle extends HookWidget {
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final int communityId;
final String instanceHost;
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const _CommunitySubscribeToggle(
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{@required this.instanceHost, @required this.communityId, Key key})
: assert(instanceHost != null),
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assert(communityId != null),
super(key: key);
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@override
Widget build(BuildContext context) {
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final theme = Theme.of(context);
final subbed = useState(true);
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final delayed = useDelayedLoading();
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final accountsStore = useAccountsStore();
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handleTap() async {
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delayed.start();
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try {
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await LemmyApiV2(instanceHost).run(FollowCommunity(
communityId: communityId,
follow: !subbed.value,
auth: accountsStore.defaultTokenFor(instanceHost).raw,
));
subbed.value = !subbed.value;
} on Exception catch (err) {
Scaffold.of(context).showSnackBar(SnackBar(
content: Text('Failed to ${subbed.value ? 'un' : ''}follow: $err'),
));
}
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delayed.cancel();
}
return InkWell(
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onTap: delayed.pending ? () {} : handleTap,
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child: Container(
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decoration: delayed.loading
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? null
: BoxDecoration(
color: subbed.value ? theme.accentColor : null,
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border: Border.all(color: theme.accentColor),
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borderRadius: BorderRadius.circular(7),
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),
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child: delayed.loading
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? const SizedBox(
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width: 20, height: 20, child: CircularProgressIndicator())
: Icon(
subbed.value ? Icons.done : Icons.add,
color: subbed.value
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? textColorBasedOnBackground(theme.accentColor)
: theme.accentColor,
size: 20,
),
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),
);
}
}