135 lines
4.7 KiB
Dart
135 lines
4.7 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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import 'package:dio/dio.dart';
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import 'package:html/parser.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:voyagehandbook/api/wikimedia.dart';
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/*
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Voyage Handbook - The open-source WikiVoyage reader
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Copyright (C) 2023 Matyáš Caras
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 3 as published by
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the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/// Used to ease up accessing local files
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class StorageAccess {
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/// Get files in `recent` folder, which contains recently opened pages
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static Future<List<Map<String, dynamic>>> get recent async {
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var files =
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Directory("${(await getApplicationDocumentsDirectory()).path}/recent");
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if (!files.existsSync()) files.createSync();
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return files
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.listSync()
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.whereType<File>()
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.toList()
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.map<Map<String, dynamic>>((e) => jsonDecode(e.readAsStringSync()))
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.toList();
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}
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/// Get files in `offline` folder, which contains recently opened pages
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static Future<List<Map<String, dynamic>>> get offline async {
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var files =
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Directory("${(await getApplicationDocumentsDirectory()).path}/offline");
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if (!files.existsSync()) files.createSync();
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return files
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.listSync()
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.whereType<File>()
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.toList()
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.map<Map<String, dynamic>>((e) => jsonDecode(e.readAsStringSync()))
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.toList();
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}
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static void addToRecents(String pageName, String pageKey) async {
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var files =
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Directory("${(await getApplicationDocumentsDirectory()).path}/recent");
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if (!files.existsSync()) files.createSync();
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var content = files.listSync();
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if (content.length > 4) {
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// delete last recent
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// TODO: configurable
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File? f;
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for (var file in content) {
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if (file is Directory) continue;
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var modi = (await file.stat()).modified;
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if (f == null || (await f.stat()).modified.isAfter(modi)) {
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f = file as File;
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}
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}
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f!.deleteSync();
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}
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var recent = File("${files.path}/${pageName.replaceAll(' ', '_')}");
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if (recent.existsSync()) {
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// if recent already exists, simply change date
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var recentContent = jsonDecode(recent.readAsStringSync());
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recentContent["date"] = DateTime.now().millisecondsSinceEpoch;
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recent.writeAsStringSync(jsonEncode(recentContent));
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} else {
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// else create files
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var recentContent = {
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"date": DateTime.now().millisecondsSinceEpoch,
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"name": pageName,
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"key": pageKey
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};
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recent.writeAsStringSync(jsonEncode(recentContent));
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}
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}
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static Future<bool> isDownloaded(String pageKey) async {
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var files =
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Directory("${(await getApplicationDocumentsDirectory()).path}/recent");
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var offlinePage = File("${files.path}/$pageKey");
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return offlinePage.existsSync();
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}
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static Future<void> downloadArticle(String pageKey, String pageTitle) async {
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var files =
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Directory("${(await getApplicationDocumentsDirectory()).path}/offline");
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var offlinePage = File("${files.path}/$pageKey");
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var page = parse(await WikiApi.getRawPage(pageKey))
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.body!
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.getElementsByTagName("section");
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var out = "<html><head></head><body>";
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for (var el in page) {
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out += el.outerHtml;
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var imgMatch = RegExp(r'<img src="(.+?)">').allMatches(el.innerHtml);
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if (imgMatch.isNotEmpty) {
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// download images offline
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for (var match in imgMatch) {
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var src = match.group(1)!;
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var r = await Dio().get(
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src,
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options: Options(
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responseType: ResponseType.bytes,
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followRedirects: false,
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validateStatus: (status) {
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return (status ?? 200) < 500;
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},
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),
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);
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var img = File("${files.path}/${src.split('/').last}");
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print(img.path);
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var openImg = img.openSync(mode: FileMode.write);
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openImg.writeFromSync(r.data);
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}
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}
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}
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if (page.isEmpty) return Future.error("No sections to save");
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offlinePage.writeAsStringSync(
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jsonEncode({"title": pageTitle, "key": pageKey, "content": out}),
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mode: FileMode.writeOnly);
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}
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}
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