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

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import 'package:cached_network_image/cached_network_image.dart';
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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';
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import 'package:intl/intl.dart';
import 'package:lemmy_api_client/lemmy_api_client.dart';
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import 'package:url_launcher/url_launcher.dart' as ul;
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import '../hooks/delayed_loading.dart';
import '../hooks/logged_in_action.dart';
import '../hooks/memo_future.dart';
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import '../hooks/stores.dart';
import '../util/extensions/api.dart';
import '../util/goto.dart';
import '../util/intl.dart';
import '../util/text_color.dart';
import '../widgets/badge.dart';
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import '../widgets/bottom_modal.dart';
import '../widgets/fullscreenable_image.dart';
import '../widgets/markdown_text.dart';
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import '../widgets/sortable_infinite_list.dart';
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/// Displays posts, comments, and general info about the given community
class CommunityPage extends HookWidget {
final CommunityView _community;
final String instanceUrl;
final String communityName;
final int communityId;
CommunityPage.fromName({
@required this.communityName,
@required this.instanceUrl,
}) : assert(communityName != null),
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assert(instanceUrl != null),
communityId = null,
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_community = null;
CommunityPage.fromId({
@required this.communityId,
@required this.instanceUrl,
}) : assert(communityId != null),
assert(instanceUrl != null),
communityName = null,
_community = null;
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CommunityPage.fromCommunityView(this._community)
: instanceUrl = _community.instanceUrl,
communityId = _community.id,
communityName = _community.name;
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
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final accountsStore = useAccountsStore();
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final fullCommunitySnap = useMemoFuture(() {
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final token = accountsStore.defaultTokenFor(instanceUrl);
if (communityId != null) {
return LemmyApi(instanceUrl).v1.getCommunity(
id: communityId,
auth: token?.raw,
);
} else {
return LemmyApi(instanceUrl).v1.getCommunity(
name: communityName,
auth: token?.raw,
);
}
});
final colorOnCard = textColorBasedOnBackground(theme.cardColor);
final community = () {
if (fullCommunitySnap.hasData) {
return fullCommunitySnap.data.community;
} else if (_community != null) {
return _community;
} else {
return null;
}
}();
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// FALLBACK
if (community == null) {
return Scaffold(
appBar: AppBar(
iconTheme: theme.iconTheme,
brightness: theme.brightness,
backgroundColor: theme.cardColor,
elevation: 0,
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
if (fullCommunitySnap.hasError) ...[
Icon(Icons.error),
Padding(
padding: const EdgeInsets.all(8),
child: Text('ERROR: ${fullCommunitySnap.error}'),
)
] else
CircularProgressIndicator(semanticsLabel: 'loading')
],
),
),
);
}
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// FUNCTIONS
void _share() =>
Share.text('Share instance', community.actorId, 'text/plain');
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void _openMoreMenu() {
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showModalBottomSheet(
backgroundColor: Colors.transparent,
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context: context,
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builder: (context) => BottomModal(
child: Column(
children: [
ListTile(
leading: Icon(Icons.open_in_browser),
title: Text('Open in browser'),
onTap: () async => await ul.canLaunch(community.actorId)
? ul.launch(community.actorId)
: Scaffold.of(context).showSnackBar(
SnackBar(content: Text("can't open in browser"))),
),
ListTile(
leading: Icon(Icons.info_outline),
title: Text('Nerd stuff'),
onTap: () {
showDialog(
context: context,
child: SimpleDialog(
contentPadding: const EdgeInsets.symmetric(
horizontal: 20,
vertical: 15,
),
children: [
Table(
children: [
TableRow(children: [
Text('created by:'),
Text('@${community.creatorName}'),
]),
TableRow(children: [
Text('hot rank:'),
Text(community.hotRank.toString()),
]),
TableRow(children: [
Text('published:'),
Text(
'''${DateFormat.yMMMd().format(community.published)}'''
''' ${DateFormat.Hms().format(community.published)}'''),
]),
],
),
]));
},
),
],
),
),
);
}
return Scaffold(
body: DefaultTabController(
length: 3,
child: NestedScrollView(
headerSliverBuilder: (context, innerBoxIsScrolled) => <Widget>[
// TODO: change top section to be more flexible
SliverAppBar(
expandedHeight: 300,
floating: false,
pinned: true,
elevation: 0,
backgroundColor: theme.cardColor,
brightness: theme.brightness,
iconTheme: theme.iconTheme,
title: Text('!${community.name}',
style: TextStyle(color: colorOnCard)),
actions: [
IconButton(icon: Icon(Icons.share), onPressed: _share),
IconButton(
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icon: Icon(Icons.more_vert), onPressed: _openMoreMenu),
],
flexibleSpace: FlexibleSpaceBar(
background:
_CommunityOverview(community, instanceUrl: instanceUrl),
),
),
SliverPersistentHeader(
delegate: _SliverAppBarDelegate(
TabBar(
labelColor: theme.textTheme.bodyText1.color,
unselectedLabelColor: Colors.grey,
tabs: [
Tab(text: 'Posts'),
Tab(text: 'Comments'),
Tab(text: 'About'),
],
),
),
pinned: true,
),
],
body: TabBarView(
children: [
InfinitePostList(
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fetcher: (page, batchSize, sort) =>
LemmyApi(community.instanceUrl).v1.getPosts(
type: PostListingType.community,
sort: sort,
communityId: community.id,
page: page,
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limit: batchSize,
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),
),
InfiniteCommentList(
fetcher: (page, batchSize, sortType) =>
LemmyApi(community.instanceUrl).v1.getComments(
communityId: community.id,
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auth: accountsStore
.defaultTokenFor(community.instanceUrl)
?.raw,
type: CommentListingType.community,
sort: sortType,
limit: batchSize,
page: page,
)),
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_AboutTab(
community: community,
moderators: fullCommunitySnap.data?.moderators,
),
],
),
),
),
);
}
}
class _CommunityOverview extends StatelessWidget {
final CommunityView community;
final String instanceUrl;
_CommunityOverview(
this.community, {
@required this.instanceUrl,
}) : assert(instanceUrl != 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.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)
]),
),
Container(
width: 83,
height: 83,
child: FullscreenableImage(
url: community.icon,
child: CachedNetworkImage(
imageUrl: community.icon,
imageBuilder: (context, imageProvider) => Container(
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
fit: BoxFit.cover,
image: imageProvider,
),
),
),
errorWidget: (_, __, ___) => Icon(Icons.warning),
),
),
),
],
)
: null;
return Stack(children: [
if (community.banner != null)
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FullscreenableImage(
url: community.banner,
child: CachedNetworkImage(
imageUrl: community.banner,
errorWidget: (_, __, ___) => SizedBox.shrink(),
),
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),
SafeArea(
child: Padding(
padding: const EdgeInsets.only(top: 45),
child: Column(children: [
if (community.icon != null)
Center(
child: Padding(
padding: const EdgeInsets.only(top: 0),
child: Center(child: 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: [
TextSpan(
text: '!',
style: TextStyle(fontWeight: FontWeight.w200)),
TextSpan(
text: community.name,
style: TextStyle(fontWeight: FontWeight.w600)),
TextSpan(
text: '@',
style: TextStyle(fontWeight: FontWeight.w200)),
TextSpan(
text: instanceUrl,
style: TextStyle(fontWeight: FontWeight.w600),
recognizer: TapGestureRecognizer()
..onTap = () => goToInstance(context, instanceUrl)),
],
),
),
)),
// TITLE/MOTTO
Center(
child: Padding(
padding: const EdgeInsets.only(top: 8, left: 20, right: 20),
child: Text(
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: [
Spacer(),
Padding(
padding: const EdgeInsets.only(right: 3),
child: Icon(Icons.people, size: 20),
),
Text(compactNumber(community.numberOfSubscribers)),
Spacer(
flex: 4,
),
Padding(
padding: const EdgeInsets.only(right: 3),
child: Icon(Icons.record_voice_over, size: 20),
),
Text('xx'), // TODO: display online users
Spacer(),
],
),
),
_FollowButton(community),
],
),
),
]),
),
),
]);
}
}
class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
_SliverAppBarDelegate(this._tabBar);
final TabBar _tabBar;
@override
double get minExtent => _tabBar.preferredSize.height;
@override
double get maxExtent => _tabBar.preferredSize.height;
@override
Widget build(
BuildContext context, double shrinkOffset, bool overlapsContent) {
final theme = Theme.of(context);
return Container(child: _tabBar, color: theme.cardColor);
}
@override
bool shouldRebuild(_SliverAppBarDelegate oldDelegate) => false;
}
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class _AboutTab extends StatelessWidget {
final CommunityView community;
final List<CommunityModeratorView> moderators;
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const _AboutTab({
Key key,
@required this.community,
@required this.moderators,
}) : super(key: key);
void goToModlog() {
print('GO TO MODLOG');
}
void goToCategories() {
print('GO TO CATEGORIES');
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return ListView(
padding: EdgeInsets.only(top: 20),
children: [
if (community.description != null) ...[
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: MarkdownText(community.description,
instanceUrl: community.instanceUrl),
),
_Divider(),
],
SizedBox(
height: 25,
child: ListView(
scrollDirection: Axis.horizontal,
children: [
// TODO: consider using Chips
Padding(
padding: const EdgeInsets.only(left: 7),
child: _Badge('X users online'),
),
_Badge(
'''${community.numberOfSubscribers} subscriber${pluralS(community.numberOfSubscribers)}'''),
_Badge(
'''${community.numberOfPosts} post${pluralS(community.numberOfPosts)}'''),
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Padding(
padding: const EdgeInsets.only(right: 15),
child: _Badge(
'''${community.numberOfComments} comment${pluralS(community.numberOfComments)}'''),
),
],
),
),
_Divider(),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 0),
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child: OutlineButton(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
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child: Text('${community.categoryName}'),
onPressed: goToCategories,
),
),
_Divider(),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
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child: OutlineButton(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10),
),
child: Text('Modlog'),
onPressed: goToModlog,
),
),
_Divider(),
if (moderators != null && moderators.isNotEmpty) ...[
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: Text('Mods:', style: theme.textTheme.subtitle2),
),
for (final mod in moderators)
ListTile(
title: Text(mod.userPreferredUsername ?? '@${mod.userName}'),
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onTap: () => goToUser.byId(context, mod.instanceUrl, mod.userId),
),
]
],
);
}
}
class _Badge extends StatelessWidget {
final String text;
final bool noPad;
_Badge(this.text, {this.noPad = false});
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
return Padding(
padding: noPad ? const EdgeInsets.all(0) : const EdgeInsets.only(left: 8),
child: Badge(
child: Text(
text,
style:
TextStyle(color: textColorBasedOnBackground(theme.accentColor)),
),
),
);
}
}
class _Divider extends StatelessWidget {
@override
Widget build(BuildContext context) => Padding(
padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 10),
child: Divider(),
);
}
class _FollowButton extends HookWidget {
final CommunityView community;
_FollowButton(this.community);
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
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final isSubbed = useState(community.subscribed ?? false);
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final delayed = useDelayedLoading(const Duration(milliseconds: 500));
final loggedInAction = useLoggedInAction(community.instanceUrl);
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final colorOnTopOfAccent = textColorBasedOnBackground(theme.accentColor);
subscribe(Jwt token) async {
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delayed.start();
try {
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await LemmyApi(community.instanceUrl).v1.followCommunity(
communityId: 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: [
Icon(Icons.warning),
SizedBox(width: 10),
Text("couldn't ${isSubbed.value ? 'un' : ''}sub :<"),
],
),
));
}
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delayed.cancel();
}
return Center(
child: SizedBox(
height: 27,
width: 160,
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child: delayed.loading
? RaisedButton(
onPressed: null,
child: SizedBox(
height: 15,
width: 15,
child: CircularProgressIndicator(),
),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20),
),
)
: RaisedButton.icon(
padding: EdgeInsets.symmetric(vertical: 5, horizontal: 20),
onPressed: loggedInAction(delayed.pending ? (_) {} : subscribe),
icon: isSubbed.value
? Icon(Icons.remove, size: 18, color: colorOnTopOfAccent)
: Icon(Icons.add, size: 18, color: colorOnTopOfAccent),
color: theme.accentColor,
label: Text(
'${isSubbed.value ? 'un' : ''}subscribe',
style: TextStyle(
color: colorOnTopOfAccent,
fontSize: theme.textTheme.subtitle1.fontSize),
),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20),
),
),
),
);
}
}