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

536 lines
18 KiB
Dart

import 'package:cached_network_image/cached_network_image.dart';
import 'package:esys_flutter_share/esys_flutter_share.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:lemmy_api_client/v2.dart';
import 'package:url_launcher/url_launcher.dart' as ul;
import '../hooks/delayed_loading.dart';
import '../hooks/logged_in_action.dart';
import '../hooks/memo_future.dart';
import '../hooks/stores.dart';
import '../l10n/l10n.dart';
import '../util/extensions/api.dart';
import '../util/extensions/spaced.dart';
import '../util/goto.dart';
import '../util/intl.dart';
import '../util/more_icon.dart';
import '../widgets/avatar.dart';
import '../widgets/bottom_modal.dart';
import '../widgets/fullscreenable_image.dart';
import '../widgets/info_table_popup.dart';
import '../widgets/markdown_text.dart';
import '../widgets/reveal_after_scroll.dart';
import '../widgets/sortable_infinite_list.dart';
import 'create_post.dart';
import 'modlog_page.dart';
/// Displays posts, comments, and general info about the given community
class CommunityPage extends HookWidget {
final CommunityView _community;
final String instanceHost;
final String communityName;
final int communityId;
const CommunityPage.fromName({
@required this.communityName,
@required this.instanceHost,
}) : assert(communityName != null),
assert(instanceHost != null),
communityId = null,
_community = null;
const CommunityPage.fromId({
@required this.communityId,
@required this.instanceHost,
}) : assert(communityId != null),
assert(instanceHost != null),
communityName = null,
_community = null;
CommunityPage.fromCommunityView(this._community)
: instanceHost = _community.instanceHost,
communityId = _community.community.id,
communityName = _community.community.name;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final accountsStore = useAccountsStore();
final scrollController = useScrollController();
final fullCommunitySnap = useMemoFuture(() {
final token = accountsStore.defaultTokenFor(instanceHost);
if (communityId != null) {
return LemmyApiV2(instanceHost).run(GetCommunity(
id: communityId,
auth: token?.raw,
));
} else {
return LemmyApiV2(instanceHost).run(GetCommunity(
name: communityName,
auth: token?.raw,
));
}
});
final community = () {
if (fullCommunitySnap.hasData) {
return fullCommunitySnap.data.communityView;
} else if (_community != null) {
return _community;
} else {
return null;
}
}();
// FALLBACK
if (community == null) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
if (fullCommunitySnap.hasError) ...[
const Icon(Icons.error),
Padding(
padding: const EdgeInsets.all(8),
child: Text('ERROR: ${fullCommunitySnap.error}'),
)
] else
const CircularProgressIndicator(semanticsLabel: 'loading')
],
),
),
);
}
// FUNCTIONS
void _share() =>
Share.text('Share instance', community.community.actorId, 'text/plain');
void _openMoreMenu() {
showBottomModal(
context: context,
builder: (context) => Column(
children: [
ListTile(
leading: const Icon(Icons.open_in_browser),
title: const Text('Open in browser'),
onTap: () async => await ul.canLaunch(community.community.actorId)
? ul.launch(community.community.actorId)
: Scaffold.of(context).showSnackBar(
const SnackBar(content: Text("can't open in browser"))),
),
ListTile(
leading: const Icon(Icons.info_outline),
title: const Text('Nerd stuff'),
onTap: () {
showInfoTablePopup(context: context, table: community.toJson());
},
),
],
),
);
}
return Scaffold(
floatingActionButton: CreatePostFab(community: community),
body: DefaultTabController(
length: 3,
child: NestedScrollView(
controller: scrollController,
headerSliverBuilder: (context, innerBoxIsScrolled) => <Widget>[
SliverAppBar(
expandedHeight: community.community.icon == null ? 220 : 300,
pinned: true,
backgroundColor: theme.cardColor,
title: RevealAfterScroll(
scrollController: scrollController,
after: community.community.icon == null ? 110 : 190,
fade: true,
child: Text(
community.community.displayName,
overflow: TextOverflow.fade,
softWrap: false,
),
),
actions: [
IconButton(icon: const Icon(Icons.share), onPressed: _share),
IconButton(icon: Icon(moreIcon), onPressed: _openMoreMenu),
],
flexibleSpace: FlexibleSpaceBar(
background: _CommunityOverview(
community: community,
instanceHost: instanceHost,
onlineUsers: fullCommunitySnap.data?.online,
),
),
bottom: PreferredSize(
preferredSize: const TabBar(tabs: []).preferredSize,
child: Material(
color: theme.cardColor,
child: TabBar(
tabs: [
Tab(text: L10n.of(context).posts),
Tab(text: L10n.of(context).comments),
const Tab(text: 'About'),
],
),
),
),
),
],
body: TabBarView(
children: [
InfinitePostList(
fetcher: (page, batchSize, sort) =>
LemmyApiV2(community.instanceHost).run(GetPosts(
type: PostListingType.community,
sort: sort,
communityId: community.community.id,
page: page,
limit: batchSize,
)),
),
InfiniteCommentList(
fetcher: (page, batchSize, sortType) =>
LemmyApiV2(community.instanceHost).run(GetComments(
communityId: community.community.id,
auth: accountsStore
.defaultTokenFor(community.instanceHost)
?.raw,
type: CommentListingType.community,
sort: sortType,
limit: batchSize,
page: page,
))),
_AboutTab(
community: community,
moderators: fullCommunitySnap.data?.moderators,
onlineUsers: fullCommunitySnap.data?.online,
),
],
),
),
),
);
}
}
class _CommunityOverview extends StatelessWidget {
final CommunityView community;
final String instanceHost;
final int onlineUsers;
const _CommunityOverview({
@required this.community,
@required this.instanceHost,
@required this.onlineUsers,
}) : assert(instanceHost != null),
assert(goToInstance != null);
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final shadow = BoxShadow(color: theme.canvasColor, blurRadius: 5);
final icon = community.community.icon != null
? Stack(
alignment: Alignment.center,
children: [
Container(
width: 90,
height: 90,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
boxShadow: [
BoxShadow(
color: Colors.black.withOpacity(0.7),
blurRadius: 3,
),
],
),
),
FullscreenableImage(
url: community.community.icon,
child: Avatar(
url: community.community.icon,
radius: 83 / 2,
),
),
],
)
: null;
return Stack(children: [
if (community.community.banner != null)
FullscreenableImage(
url: community.community.banner,
child: CachedNetworkImage(
imageUrl: community.community.banner,
errorWidget: (_, __, ___) => const SizedBox.shrink(),
),
),
SafeArea(
child: Padding(
padding: const EdgeInsets.only(top: 45),
child: Column(children: [
if (community.community.icon != null) icon,
// NAME
Center(
child: Padding(
padding: const EdgeInsets.only(top: 10),
child: RichText(
overflow: TextOverflow.ellipsis, // TODO: fix overflowing
text: TextSpan(
style:
theme.textTheme.subtitle1.copyWith(shadows: [shadow]),
children: [
const TextSpan(
text: '!',
style: TextStyle(fontWeight: FontWeight.w200)),
TextSpan(
text: community.community.name,
style: const TextStyle(fontWeight: FontWeight.w600)),
const TextSpan(
text: '@',
style: TextStyle(fontWeight: FontWeight.w200)),
TextSpan(
text: community.community.originInstanceHost,
style: const TextStyle(fontWeight: FontWeight.w600),
recognizer: TapGestureRecognizer()
..onTap = () => goToInstance(
context, community.community.originInstanceHost),
),
],
),
),
),
),
// TITLE/MOTTO
Center(
child: Padding(
padding: const EdgeInsets.only(top: 8, left: 20, right: 20),
child: Text(
community.community.title,
textAlign: TextAlign.center,
style:
TextStyle(fontWeight: FontWeight.w300, shadows: [shadow]),
),
),
),
Padding(
padding: const EdgeInsets.only(top: 20),
child: Stack(
children: [
// INFO ICONS
Padding(
padding: const EdgeInsets.only(top: 5),
child: Row(
children: [
const Spacer(),
const Padding(
padding: EdgeInsets.only(right: 3),
child: Icon(Icons.people, size: 20),
),
Text(compactNumber(community.counts.subscribers)),
const Spacer(flex: 4),
const Padding(
padding: EdgeInsets.only(right: 3),
child: Icon(Icons.record_voice_over, size: 20),
),
Text(onlineUsers == null
? 'xx'
: compactNumber(onlineUsers)),
const Spacer(),
],
),
),
_FollowButton(community),
],
),
),
]),
),
),
]);
}
}
class _AboutTab extends StatelessWidget {
final CommunityView community;
final List<CommunityModeratorView> moderators;
final int onlineUsers;
const _AboutTab({
Key key,
@required this.community,
@required this.moderators,
@required this.onlineUsers,
}) : super(key: key);
void goToCategories() {
print('GO TO CATEGORIES');
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return ListView(
padding: const EdgeInsets.only(top: 20),
children: [
if (community.community.description != null) ...[
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: MarkdownText(community.community.description,
instanceHost: community.instanceHost),
),
const _Divider(),
],
SizedBox(
height: 32,
child: ListView(
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.symmetric(horizontal: 15),
children: [
Chip(label: Text('${onlineUsers ?? 'X'} users online')),
Chip(
label: Text(
'${community.counts.subscribers} subscriber${pluralS(community.counts.subscribers)}')),
Chip(
label: Text(
'${community.counts.posts} post${pluralS(community.counts.posts)}')),
Chip(
label: Text(
'${community.counts.comments} comment${pluralS(community.counts.comments)}')),
].spaced(8),
),
),
const _Divider(),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: OutlinedButton(
onPressed: goToCategories,
child: Text(community.category.name),
),
),
const _Divider(),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: OutlinedButton(
onPressed: () => goTo(
context,
(context) => ModlogPage.forCommunity(
instanceHost: community.instanceHost,
communityId: community.community.id,
communityName: community.community.name,
),
),
child: Text(L10n.of(context).modlog),
),
),
const _Divider(),
if (moderators != null && moderators.isNotEmpty) ...[
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: Text('Mods:', style: theme.textTheme.subtitle2),
),
for (final mod in moderators)
// TODO: add user picture, maybe make it into reusable component
ListTile(
title: Text(
mod.moderator.preferredUsername ?? '@${mod.moderator.name}'),
onTap: () => goToUser.fromUserSafe(context, mod.moderator),
),
]
],
);
}
}
class _Divider extends StatelessWidget {
const _Divider();
@override
Widget build(BuildContext context) => const Padding(
padding: EdgeInsets.symmetric(horizontal: 15, vertical: 10),
child: Divider(),
);
}
class _FollowButton extends HookWidget {
final CommunityView community;
const _FollowButton(this.community);
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final isSubbed = useState(community.subscribed ?? false);
final delayed = useDelayedLoading(Duration.zero);
final loggedInAction = useLoggedInAction(community.instanceHost);
subscribe(Jwt token) async {
delayed.start();
try {
await LemmyApiV2(community.instanceHost).run(FollowCommunity(
communityId: community.community.id,
follow: !isSubbed.value,
auth: token.raw));
isSubbed.value = !isSubbed.value;
// ignore: avoid_catches_without_on_clauses
} catch (e) {
Scaffold.of(context).showSnackBar(SnackBar(
content: Row(
children: [
const Icon(Icons.warning),
const SizedBox(width: 10),
Text("couldn't ${isSubbed.value ? 'un' : ''}sub :<"),
],
),
));
}
delayed.cancel();
}
return ElevatedButtonTheme(
data: ElevatedButtonThemeData(
style: theme.elevatedButtonTheme.style.copyWith(
shape: MaterialStateProperty.all(const StadiumBorder()),
textStyle: MaterialStateProperty.all(theme.textTheme.subtitle1),
),
),
child: Center(
child: SizedBox(
height: 27,
width: 160,
child: delayed.loading
? const ElevatedButton(
onPressed: null,
child: SizedBox(
height: 15,
width: 15,
child: CircularProgressIndicator(),
),
)
: ElevatedButton.icon(
onPressed:
loggedInAction(delayed.pending ? (_) {} : subscribe),
icon: isSubbed.value
? const Icon(Icons.remove, size: 18)
: const Icon(Icons.add, size: 18),
label: Text('${isSubbed.value ? 'un' : ''}subscribe'),
),
),
),
);
}
}