prasule/lib/views/settings/tessdata_list.dart
2024-01-29 18:02:06 +01:00

177 lines
7 KiB
Dart

// ignore_for_file: inference_failure_on_function_invocation
import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:flutter_tesseract_ocr/flutter_tesseract_ocr.dart';
import 'package:prasule/main.dart';
import 'package:prasule/network/tessdata.dart';
import 'package:prasule/pw/platformbutton.dart';
/// Used to manage downloaded Tessdata for OCR
class TessdataListView extends StatefulWidget {
/// Used to manage downloaded Tessdata for OCR
const TessdataListView({super.key});
@override
State<TessdataListView> createState() => _TessdataListViewState();
}
class _TessdataListViewState extends State<TessdataListView> {
final _tessdata = [
{"eng": true},
];
@override
void didChangeDependencies() {
super.didChangeDependencies();
loadAllTessdata();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(AppLocalizations.of(context).ocrData)),
body: Center(
child: SizedBox(
width: MediaQuery.of(context).size.width * 0.9,
height: MediaQuery.of(context).size.height,
child: (_tessdata.length == 1)
? const Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
SizedBox(
width: 80,
height: 80,
child: CircularProgressIndicator(),
),
],
)
: ListView.builder(
itemBuilder: (context, i) => ListTile(
title: Text(_tessdata[i].keys.first),
trailing: TextButton(
child: Text(
_tessdata[i][_tessdata[i].keys.first]!
? AppLocalizations.of(context).downloaded
: AppLocalizations.of(context).download,
),
onPressed: () async {
final lang = _tessdata[i].keys.first;
if (_tessdata[i][lang]!) {
// deleting data
await showAdaptiveDialog(
context: context,
builder: (context) => AlertDialog.adaptive(
title:
Text(AppLocalizations.of(context).sureDialog),
content: Text(
AppLocalizations.of(context).deleteOcr(lang),
),
actions: [
PlatformButton(
text: AppLocalizations.of(context).yes,
onPressed: () async {
await TessdataApi.deleteData(lang);
_tessdata[i][lang] = true;
if (context.mounted) {
Navigator.of(context).pop();
}
},
),
PlatformButton(
text: AppLocalizations.of(context).no,
onPressed: () {
Navigator.of(context).pop();
},
),
],
),
);
setState(() {});
return;
}
// TODO: handle wifi errors
//* downloading traineddata
final progressStream = StreamController<double>();
unawaited(
showAdaptiveDialog(
context: context,
builder: (c) => AlertDialog.adaptive(
title: Text(AppLocalizations.of(context)
.langDownloadDialog(lang),),
content: StreamBuilder(
builder: (context, snapshot) {
if (snapshot.connectionState ==
ConnectionState.waiting) {
return const CircularProgressIndicator();
}
if (snapshot.hasError) {
return const Text("Error");
}
return Text(
AppLocalizations.of(context)
.langDownloadProgress(snapshot.data!),
);
},
stream: progressStream.stream,
),
),
),
);
await TessdataApi.downloadData(
lang,
callback: (a, b) {
if (progressStream.isClosed) return;
final p = a / b * 1000;
progressStream.add(p.roundToDouble() / 10);
if (p / 10 >= 100) {
logger.i("Done");
Navigator.of(context, rootNavigator: true)
.pop("dialog");
_tessdata[i][lang] = true;
progressStream.close();
}
setState(() {});
},
);
},
),
),
itemCount: _tessdata.length,
),
),
),
);
}
/// Used to find which `.traineddata` is already downloaded and which not
/// so we can show it to the user
Future<void> loadAllTessdata() async {
final tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
final d = await TessdataApi.getAvailableData();
final dataStatus = <Map<String, bool>>[];
for (final data in d) {
final e = <String, bool>{};
e[data] = false;
dataStatus.add(e);
}
final appDir = tessDir.listSync();
for (final file in appDir) {
if (file is! File ||
!file.path.endsWith("traineddata") ||
file.path.endsWith("eng.traineddata")) continue;
logger.i(file.path);
final filename = file.path.split("/").last;
dataStatus[dataStatus.indexWhere(
(element) =>
element.keys.first == filename.replaceAll(".traineddata", ""),
)][filename.replaceAll(".traineddata", "")] = true;
}
_tessdata.addAll(dataStatus);
setState(() {});
}
}