88 lines
2.9 KiB
Dart
88 lines
2.9 KiB
Dart
import 'dart:io';
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import 'package:dio/dio.dart';
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import 'package:flutter_tesseract_ocr/flutter_tesseract_ocr.dart';
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import 'package:prasule/main.dart';
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/// Used for communication with my repo mirror
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///
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/// Downloads Tessdata for OCR
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class TessdataApi {
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static final Dio _client = Dio(
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BaseOptions(
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validateStatus: (status) => true,
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headers: {"User-Agent": "prasule/1.0.0"},
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),
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);
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/// Gets available languages from the repo
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static Future<List<String>> getAvailableData() async {
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final res = await _client.get<List<dynamic>>(
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"https://git.mnau.xyz/api/v1/repos/hernik/tessdata_fast/contents",
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options: Options(headers: {"Accept": "application/json"}),
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);
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if ((res.statusCode ?? 500) > 399) {
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return Future.error("The server returned status code ${res.statusCode}");
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}
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final data = List<Map<String, dynamic>>.from(res.data ?? []);
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final dataFiles = <String>[];
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for (final file in data) {
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if (!(file["name"] as String).endsWith(".traineddata")) continue;
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dataFiles.add((file["name"] as String).replaceAll(".traineddata", ""));
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}
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return dataFiles;
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}
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/// Deletes data from device
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static Future<void> deleteData(String name) async {
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final dataDir = Directory(await FlutterTesseractOcr.getTessdataPath());
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if (!dataDir.existsSync()) {
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dataDir.createSync();
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}
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final dataFile = File("${dataDir.path}/$name.traineddata");
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if (!dataFile.existsSync()) return;
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dataFile.deleteSync();
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}
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/// Finds existing data on the device
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static Future<List<String>> getDownloadedData() async {
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final tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
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if (!tessDir.existsSync()) {
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tessDir.createSync();
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}
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return tessDir
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.listSync()
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.where((element) => element.path.endsWith(".traineddata"))
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.map<String>((e) => e.path.split("/").last)
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.toList();
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}
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/// Downloads data from the repo to the device
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static Future<void> downloadData(
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String isoCode, {
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void Function(int, int)? callback,
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}) async {
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final tessDir = Directory(await FlutterTesseractOcr.getTessdataPath());
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if (!tessDir.existsSync()) {
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tessDir.createSync();
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}
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final file = File("${tessDir.path}/$isoCode.traineddata");
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if (file.existsSync()) return; // TODO: maybe ask to redownload?
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final res = await _client.get<List<int>>(
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"https://git.mnau.xyz/hernik/tessdata_fast/raw/branch/main/$isoCode.traineddata",
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options: Options(responseType: ResponseType.bytes),
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onReceiveProgress: callback,
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);
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if ((res.statusCode ?? 500) > 399) {
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return Future.error("The server returned status code ${res.statusCode}");
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}
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try {
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file.openSync(mode: FileMode.write)
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..writeFromSync(res.data!)
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..closeSync();
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} catch (e) {
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logger.e(e);
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return Future.error("Could not complete writing file");
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}
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}
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}
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