tsacdop-podcast-app-android/lib/util/episodegrid.dart

347 lines
13 KiB
Dart

import 'dart:convert';
import 'dart:io';
import 'dart:isolate';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:path_provider/path_provider.dart';
import 'package:tsacdop/class/episodebrief.dart';
import 'package:tsacdop/episodes/episodedetail.dart';
import 'package:tsacdop/util/pageroute.dart';
class EpisodeGrid extends StatelessWidget {
final List<EpisodeBrief> podcast;
final bool showFavorite;
final bool showDownload;
final bool showNumber;
final String heroTag;
EpisodeGrid(
{Key key,
this.podcast,
this.showDownload,
this.showFavorite,
this.showNumber,
this.heroTag})
: super(key: key);
Future<String> _getPath() async {
var dir = await getApplicationDocumentsDirectory();
return dir.path;
}
@override
Widget build(BuildContext context) {
return FutureBuilder(
future: _getPath(),
builder: (context, snapshot) {
if (snapshot.hasData) {
return CustomScrollView(
physics: const AlwaysScrollableScrollPhysics(),
primary: false,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.all(5.0),
sliver: SliverGrid(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
childAspectRatio: 1.0,
crossAxisCount: 3,
mainAxisSpacing: 6.0,
crossAxisSpacing: 6.0,
),
delegate: SliverChildBuilderDelegate(
(BuildContext context, int index) {
Color _c;
var color = json.decode(podcast[index].primaryColor);
(color[0] > 200 && color[1] > 200 && color[2] > 200)
? _c = Color.fromRGBO((255 - color[0]),
255 - color[1], 255 - color[2], 1.0)
: _c = Color.fromRGBO(
color[0], color[1], color[2], 1.0);
return InkWell(
onTap: () {
Navigator.push(
context,
ScaleRoute(
page: EpisodeDetail(
episodeItem: podcast[index],
heroTag: heroTag)),
);
},
child: Container(
decoration: BoxDecoration(
borderRadius:
BorderRadius.all(Radius.circular(5.0)),
color:
Theme.of(context).scaffoldBackgroundColor,
border: Border.all(
color: Colors.grey[100],
width: 3.0,
),
boxShadow: [
BoxShadow(
color: Colors.grey[100],
blurRadius: 1.0,
spreadRadius: 0.5,
),
]),
alignment: Alignment.center,
padding: EdgeInsets.all(8.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
flex: 2,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Hero(
tag: podcast[index].enclosureUrl +
heroTag,
child: Container(
child: ClipRRect(
borderRadius: BorderRadius.all(
Radius.circular(15.0)),
child: Container(
height: 30.0,
width: 30.0,
child: Image.file(File(
"${snapshot.data}/${podcast[index].feedTitle}.png")),
),
),
),
),
Spacer(),
showNumber
? Container(
alignment: Alignment.topRight,
child: Text(
(podcast.length - index)
.toString(),
style: GoogleFonts.teko(
textStyle: TextStyle(
fontSize: 20.0,
color: _c,
),
),
),
)
: Center(),
],
),
),
Expanded(
flex: 5,
child: Container(
alignment: Alignment.topLeft,
padding: EdgeInsets.only(top: 2.0),
child: Text(
podcast[index].title,
style: TextStyle(
fontSize: 15.0,
),
maxLines: 4,
),
),
),
Expanded(
flex: 1,
child: Row(
children: <Widget>[
Align(
alignment: Alignment.bottomLeft,
child: Text(
podcast[index]
.pubDate
.substring(4, 16),
style: TextStyle(
color: _c,
fontStyle: FontStyle.italic),
),
),
Spacer(),
showDownload
? DownloadIcon(
episodeBrief: podcast[index])
: Center(),
Padding(
padding: EdgeInsets.all(1),
),
showFavorite
? Container(
alignment: Alignment.bottomRight,
child: (podcast[index].liked == 0)
? Center()
: IconTheme(
data: IconThemeData(
size: 15),
child: Icon(
Icons.favorite,
color: Colors.red,
),
),
)
: Center(),
],
),
),
],
),
),
);
},
childCount: podcast.length,
),
),
),
],
);
}
return Center();
});
}
}
class DownloadIcon extends StatefulWidget {
final EpisodeBrief episodeBrief;
DownloadIcon({this.episodeBrief, Key key}) : super(key: key);
@override
_DownloadIconState createState() => _DownloadIconState();
}
class _DownloadIconState extends State<DownloadIcon> {
_TaskInfo _task;
bool _isLoading;
ReceivePort _port = ReceivePort();
@override
void initState() {
super.initState();
_bindBackgroundIsolate();
FlutterDownloader.registerCallback(downloadCallback);
_isLoading = true;
_prepare();
}
@override
void dispose() {
_unbindBackgroundIsolate();
super.dispose();
}
void _bindBackgroundIsolate() {
bool isSuccess = IsolateNameServer.registerPortWithName(
_port.sendPort, 'downloader_send_port');
if (!isSuccess) {
_unbindBackgroundIsolate();
_bindBackgroundIsolate();
return;
}
_port.listen((dynamic data) {
print('UI isolate callback: $data');
String id = data[0];
DownloadTaskStatus status = data[1];
int progress = data[2];
if (_task.taskId == id) {
setState(() {
_task.status = status;
_task.progress = progress;
});
}
});
}
void _unbindBackgroundIsolate() {
IsolateNameServer.removePortNameMapping('downloader_send_port');
}
static void downloadCallback(
String id, DownloadTaskStatus status, int progress) {
print('Background callback task in $id status ($status) $progress');
final SendPort send =
IsolateNameServer.lookupPortByName('downloader_send_port');
send.send([id, status, progress]);
}
Future<Null> _prepare() async {
final tasks = await FlutterDownloader.loadTasks();
_task = _TaskInfo(
name: widget.episodeBrief.title,
link: widget.episodeBrief.enclosureUrl);
tasks?.forEach((task) {
if (_task.link == task.url) {
_task.taskId = task.taskId;
_task.status = task.status;
_task.progress = task.progress;
}
});
setState(() {
_isLoading = false;
});
}
@override
Widget build(BuildContext context) {
return _downloadButton(_task);
}
Widget _downloadButton(_TaskInfo task) {
if (_isLoading)
return Center();
else if (task.status == DownloadTaskStatus.running) {
return SizedBox(
height: 12,
width: 12,
child: CircularProgressIndicator(
backgroundColor: Colors.grey[200],
strokeWidth: 1,
valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
value: task.progress / 100,
),
);
} else if (task.status == DownloadTaskStatus.paused) {
return SizedBox(
height: 12,
width: 12,
child: CircularProgressIndicator(
backgroundColor: Colors.grey[200],
strokeWidth: 1,
valueColor: AlwaysStoppedAnimation<Color>(Colors.red),
value: task.progress / 100,
),
);
} else if (task.status == DownloadTaskStatus.complete) {
return IconTheme(
data: IconThemeData(size: 15),
child: Icon(
Icons.done_all,
color: Colors.blue,
),
);
} else if (task.status == DownloadTaskStatus.failed) {
return IconTheme(
data: IconThemeData(size: 15),
child: Icon(Icons.refresh, color: Colors.red),
);
}
return Center();
}
}
class _TaskInfo {
final String name;
final String link;
String taskId;
int progress = 0;
DownloadTaskStatus status = DownloadTaskStatus.undefined;
_TaskInfo({this.name, this.link});
}