Add Uptodown (#853)

lib/app_sources/uptodown.dart

@@ -0,0 +1,82 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:html/parser.dart';
+import 'package:obtainium/app_sources/apkpure.dart';
+import 'package:obtainium/custom_errors.dart';
+import 'package:obtainium/providers/source_provider.dart';
+
+class Uptodown extends AppSource {
+  Uptodown() {
+    host = 'uptodown.com';
+    allowSubDomains = true;
+  }
+
+  @override
+  String sourceSpecificStandardizeURL(String url) {
+    RegExp standardUrlRegEx = RegExp('^https?://([^\\.]+\\.){2,}$host');
+    RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
+    if (match == null) {
+      throw InvalidURLError(name);
+    }
+    return '${url.substring(0, match.end)}/android/download';
+  }
+
+  @override
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
+    return (await getAppDetailsFromPage(standardUrl))['appId'];
+  }
+
+  Future<Map<String, String?>> getAppDetailsFromPage(String standardUrl) async {
+    var res = await sourceRequest(standardUrl);
+    if (res.statusCode != 200) {
+      throw getObtainiumHttpError(res);
+    }
+    var html = parse(res.body);
+    String? version = html.querySelector('div.version')?.innerHtml;
+    String? apkUrl =
+        html.querySelector('#detail-download-button')?.attributes['data-url'];
+    String? name = html.querySelector('#detail-app-name')?.innerHtml;
+    String? author = html.querySelector('#author-link')?.innerHtml;
+    var detailElements = html.querySelectorAll('#technical-information td');
+    String? appId = (detailElements.elementAtOrNull(2))?.innerHtml;
+    String? dateStr = (detailElements.elementAtOrNull(29))?.innerHtml;
+    return Map.fromEntries([
+      MapEntry('version', version),
+      MapEntry('apkUrl', apkUrl),
+      MapEntry('appId', appId),
+      MapEntry('name', name),
+      MapEntry('author', author),
+      MapEntry('dateStr', dateStr)
+    ]);
+  }
+
+  @override
+  Future<APKDetails> getLatestAPKDetails(
+    String standardUrl,
+    Map<String, dynamic> additionalSettings,
+  ) async {
+    var appDetails = await getAppDetailsFromPage(standardUrl);
+    var version = appDetails['version'];
+    var apkUrl = appDetails['apkUrl'];
+    var appId = appDetails['appId'];
+    if (version == null) {
+      throw NoVersionError();
+    }
+    if (apkUrl == null) {
+      throw NoAPKError();
+    }
+    if (appId == null) {
+      throw NoReleasesError();
+    }
+    String appName = appDetails['name'] ?? tr('app');
+    String author = appDetails['author'] ?? name;
+    String? dateStr = appDetails['dateStr'];
+    DateTime? relDate;
+    if (dateStr != null) {
+      relDate = parseDateTimeMMMddCommayyyy(dateStr);
+    }
+    return APKDetails(
+        version, getApkUrlsFromUrls([apkUrl]), AppNames(author, appName),
+        releaseDate: relDate);
+  }
+}