Initial progress of RuStore

almost ran out of storage space while trying to build

lib/app_sources/rustore.dart

@@ -0,0 +1,77 @@
+import 'dart:convert';
+
+import 'package:easy_localization/easy_localization.dart';
+import 'package:http/http.dart';
+import 'package:obtainium/custom_errors.dart';
+import 'package:obtainium/providers/source_provider.dart';
+
+class RuStore extends AppSource {
+  RuStore() {
+    hosts = ['rustore.ru'];
+    name = 'RuStore';
+    naiveStandardVersionDetection = true;
+    showReleaseDateAsVersionToggle = true;
+  }
+
+  @override
+  String sourceSpecificStandardizeURL(String url, {bool forSelection = false}) {
+    RegExp standardUrlRegEx = RegExp(
+        '^https?://(www\\.)?${getSourceRegex(hosts)}/catalog/app/+[^/]+',
+        caseSensitive: false);
+    RegExpMatch? match = standardUrlRegEx.firstMatch(url);
+    if (match == null) {
+      throw InvalidURLError(name);
+    }
+    return match.group(0)!;
+  }
+
+  @override
+  Future<String?> tryInferringAppId(String standardUrl,
+      {Map<String, dynamic> additionalSettings = const {}}) async {
+    return Uri.parse(standardUrl).pathSegments.last;
+  }
+
+  @override
+  Future<APKDetails> getLatestAPKDetails(
+    String standardUrl,
+    Map<String, dynamic> additionalSettings,
+  ) async {
+    String? appId = await tryInferringAppId(standardUrl);
+    Response res0 = await sourceRequest(
+        'https://backapi.${hosts[0]}/applicationData/overallInfo/${appId}',
+        additionalSettings);
+    if (res0.statusCode != 200) {
+      throw getObtainiumHttpError(res0);
+    }
+    var appDetails = jsonDecode(res0.body)['body'];
+    if (appDetails['appId'] == null) {
+      throw NoReleasesError();
+    }
+
+    String appName = appDetails['appName'] ?? tr('app');
+    String author = appDetails['companyName'] ?? name;
+    String? dateStr = appDetails['updatedAt'];
+    String? version = appDetails['versionName'];
+    if (version == null) {
+      throw NoVersionError();
+    }
+    DateTime? relDate;
+    if (dateStr != null) {
+      relDate = DateTime.parse(dateStr);
+    }
+
+    Response res1 = await sourceRequest(
+        'https://backapi.${hosts[0]}/applicationData/download-link',
+        additionalSettings,
+        followRedirects: false,
+        postBody: {"appId": appDetails['appId'], "firstInstall": true});
+    var downloadDetails = jsonDecode(res0.body)['body'];
+    if (res1.statusCode != 200 && downloadDetails['apkUrl'] == null) {
+      throw NoAPKError();
+    }
+
+    return APKDetails(version, getApkUrlsFromUrls([downloadDetails['apkUrl']]),
+        AppNames(author, appName),
+        releaseDate: relDate);
+  }
+}