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

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Dart
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import 'dart:async';
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import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:fuzzy/fuzzy.dart';
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import 'package:lemmy_api_client/lemmy_api_client.dart';
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import '../hooks/delayed_loading.dart';
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import '../hooks/memo_future.dart';
import '../hooks/stores.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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/// List of subscribed communities per instance
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class CommunitiesTab extends HookWidget {
CommunitiesTab();
@override
Widget build(BuildContext context) {
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final theme = Theme.of(context);
final filterController = useTextEditingController();
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useValueListenable(filterController);
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final accountsStore = useAccountsStore();
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final amountOfDisplayInstances =
useMemoized(() => accountsStore.loggedInInstances.length);
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final isCollapsed = useState(List.filled(amountOfDisplayInstances, false));
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// TODO: rebuild when instances/accounts change
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final instancesSnap = useMemoFuture(() {
final futures = accountsStore.loggedInInstances
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.map(
(instanceUrl) =>
LemmyApi(instanceUrl).v1.getSite().then((e) => e.site),
)
.toList();
return Future.wait(futures);
});
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final communitiesSnap = useMemoFuture(() {
final futures = accountsStore.loggedInInstances
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.map(
(instanceUrl) => LemmyApi(instanceUrl)
.v1
.getUserDetails(
sort: SortType.active,
savedOnly: false,
userId: accountsStore.defaultTokenFor(instanceUrl).payload.id,
)
.then((e) => e.follows),
)
.toList();
return Future.wait(futures);
});
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if (communitiesSnap.hasError || instancesSnap.hasError) {
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return Scaffold(
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appBar: AppBar(),
body: Center(
child: Row(
children: [
Icon(Icons.error),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
communitiesSnap.error?.toString() ??
instancesSnap.error?.toString(),
),
)
],
),
),
);
} else if (!communitiesSnap.hasData || !instancesSnap.hasData) {
return Scaffold(
appBar: AppBar(),
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body: Center(
child: CircularProgressIndicator(),
),
);
}
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final instances = instancesSnap.data;
final communities = communitiesSnap.data
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..forEach(
(e) => e.sort((a, b) => a.communityName.compareTo(b.communityName)));
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final filterIcon = () {
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if (filterController.text.isEmpty) {
return Icon(Icons.filter_list);
}
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return IconButton(
onPressed: () {
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filterController.clear();
primaryFocus.unfocus();
},
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icon: Icon(Icons.clear),
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);
}();
filterCommunities(List<CommunityFollowerView> comm) {
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final matches = Fuzzy(
comm.map((e) => e.communityName).toList(),
options: FuzzyOptions(threshold: 0.5),
).search(filterController.text).map((e) => e.item);
return matches
.map((match) => comm.firstWhere((e) => e.communityName == 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(
icon: Icon(Icons.style),
onPressed: () {}, // TODO: change styles?
),
],
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title: TextField(
controller: filterController,
textAlign: TextAlign.center,
decoration: InputDecoration(
suffixIcon: filterIcon,
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isDense: true,
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border: OutlineInputBorder(),
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hintText: 'Filter', // TODO: hint with an filter icon
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),
),
),
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body: ListView(
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children: [
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for (final i in Iterable.generate(amountOfDisplayInstances))
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Column(
children: [
ListTile(
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onTap: () => goToInstance(
context, accountsStore.loggedInInstances.elementAt(i)),
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onLongPress: () => toggleCollapse(i),
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leading: instances[i].icon != null
? CachedNetworkImage(
height: 50,
width: 50,
imageUrl: instances[i].icon,
imageBuilder: (context, imageProvider) => Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
fit: BoxFit.cover, image: imageProvider),
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),
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),
errorWidget: (_, __, ___) => SizedBox(width: 50),
)
: SizedBox(width: 50),
title: Text(
instances[i].name,
style: theme.textTheme.headline6,
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),
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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])
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for (final comm in filterCommunities(communities[i]))
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Padding(
padding: const EdgeInsets.only(left: 17),
child: ListTile(
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onTap: () => goToCommunity.byId(
context,
accountsStore.loggedInInstances.elementAt(i),
comm.communityId),
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dense: true,
leading: VerticalDivider(
color: theme.hintColor,
),
title: Row(
children: [
if (comm.communityIcon != null)
CachedNetworkImage(
height: 30,
width: 30,
imageUrl: comm.communityIcon,
imageBuilder: (context, imageProvider) =>
Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
fit: BoxFit.cover,
image: imageProvider),
),
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),
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errorWidget: (_, __, ___) =>
SizedBox(width: 30),
)
else
SizedBox(width: 30),
SizedBox(width: 10),
Text('!${comm.communityName}'),
],
),
trailing: _CommunitySubscribeToggle(
instanceUrl: comm.communityActorId.split('/')[2],
communityId: comm.communityId,
),
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),
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)
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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 instanceUrl;
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_CommunitySubscribeToggle(
{@required this.instanceUrl, @required this.communityId})
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: assert(instanceUrl != null),
assert(communityId != null);
@override
Widget build(BuildContext context) {
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final theme = Theme.of(context);
final subbed = useState(true);
final delayed = useDelayedLoading(const Duration(milliseconds: 500));
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final accountsStore = useAccountsStore();
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handleTap() async {
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delayed.start();
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try {
await LemmyApi(instanceUrl).v1.followCommunity(
communityId: communityId,
follow: !subbed.value,
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auth: accountsStore.defaultTokenFor(instanceUrl).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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? Container(
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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),
);
}
}