From e72b33ebf242b7c968d0e561dbbd64f950508cc6 Mon Sep 17 00:00:00 2001
From: Imran Remtulla <imranr98@pm.me>
Date: Sun, 23 Apr 2023 01:19:31 -0400
Subject: [PATCH] Added fallback option to GitLab Source (#456)

---
 lib/app_sources/gitlab.dart | 84 ++++++++++++++++++++++++-------------
 1 file changed, 55 insertions(+), 29 deletions(-)

diff --git a/lib/app_sources/gitlab.dart b/lib/app_sources/gitlab.dart
index 7d813d7..5b8db8c 100644
--- a/lib/app_sources/gitlab.dart
+++ b/lib/app_sources/gitlab.dart
@@ -3,10 +3,19 @@ import 'package:http/http.dart';
 import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
+import 'package:obtainium/components/generated_form.dart';
+import 'package:easy_localization/easy_localization.dart';
 
 class GitLab extends AppSource {
   GitLab() {
     host = 'gitlab.com';
+
+    additionalSourceAppSpecificSettingFormItems = [
+      [
+        GeneratedFormSwitch('fallbackToOlderReleases',
+            label: tr('fallbackToOlderReleases'), defaultValue: true)
+      ]
+    ];
   }
 
   @override
@@ -28,41 +37,58 @@ class GitLab extends AppSource {
     String standardUrl,
     Map<String, dynamic> additionalSettings,
   ) async {
+    bool fallbackToOlderReleases =
+        additionalSettings['fallbackToOlderReleases'] == true;
     Response res = await get(Uri.parse('$standardUrl/-/tags?format=atom'));
     if (res.statusCode == 200) {
       var standardUri = Uri.parse(standardUrl);
       var parsedHtml = parse(res.body);
-      var entry = parsedHtml.querySelector('entry');
-      var entryContent =
-          parse(parseFragment(entry?.querySelector('content')!.innerHtml).text);
-      var apkUrls = [
-        ...getLinksFromParsedHTML(
-            entryContent,
-            RegExp(
-                '^${standardUri.path.replaceAllMapped(RegExp(r'[.*+?^${}()|[\]\\]'), (x) {
-                  return '\\${x[0]}';
-                })}/uploads/[^/]+/[^/]+\\.apk\$',
-                caseSensitive: false),
-            standardUri.origin),
-        // GitLab releases may contain links to externally hosted APKs
-        ...getLinksFromParsedHTML(entryContent,
-                RegExp('/[^/]+\\.apk\$', caseSensitive: false), '')
-            .where((element) => Uri.parse(element).host != '')
-            .toList()
-      ];
+      var apkDetailsList = parsedHtml.querySelectorAll('entry').map((entry) {
+        var entryContent = parse(
+            parseFragment(entry.querySelector('content')!.innerHtml).text);
+        var apkUrls = [
+          ...getLinksFromParsedHTML(
+              entryContent,
+              RegExp(
+                  '^${standardUri.path.replaceAllMapped(RegExp(r'[.*+?^${}()|[\]\\]'), (x) {
+                    return '\\${x[0]}';
+                  })}/uploads/[^/]+/[^/]+\\.apk\$',
+                  caseSensitive: false),
+              standardUri.origin),
+          // GitLab releases may contain links to externally hosted APKs
+          ...getLinksFromParsedHTML(entryContent,
+                  RegExp('/[^/]+\\.apk\$', caseSensitive: false), '')
+              .where((element) => Uri.parse(element).host != '')
+              .toList()
+        ];
 
-      var entryId = entry?.querySelector('id')?.innerHtml;
-      var version =
-          entryId == null ? null : Uri.parse(entryId).pathSegments.last;
-      var releaseDateString = entry?.querySelector('updated')?.innerHtml;
-      DateTime? releaseDate =
-          releaseDateString != null ? DateTime.parse(releaseDateString) : null;
-      if (version == null) {
-        throw NoVersionError();
+        var entryId = entry.querySelector('id')?.innerHtml;
+        var version =
+            entryId == null ? null : Uri.parse(entryId).pathSegments.last;
+        var releaseDateString = entry.querySelector('updated')?.innerHtml;
+        DateTime? releaseDate = releaseDateString != null
+            ? DateTime.parse(releaseDateString)
+            : null;
+        if (version == null) {
+          throw NoVersionError();
+        }
+        return APKDetails(version, getApkUrlsFromUrls(apkUrls),
+            GitHub().getAppNames(standardUrl),
+            releaseDate: releaseDate);
+      });
+      if (apkDetailsList.isEmpty) {
+        throw NoReleasesError();
       }
-      return APKDetails(version, getApkUrlsFromUrls(apkUrls),
-          GitHub().getAppNames(standardUrl),
-          releaseDate: releaseDate);
+      if (fallbackToOlderReleases) {
+        if (additionalSettings['trackOnly'] != true) {
+          apkDetailsList =
+              apkDetailsList.where((e) => e.apkUrls.isNotEmpty).toList();
+        }
+        if (apkDetailsList.isEmpty) {
+          throw NoReleasesError();
+        }
+      }
+      return apkDetailsList.first;
     } else {
       throw getObtainiumHttpError(res);
     }