Fixed F-Droid repo search (#1400) + general search bugfixes

lib/app_sources/fdroidrepo.dart

@@ -1,5 +1,6 @@
 import 'package:easy_localization/easy_localization.dart';
 import 'package:html/parser.dart';
+import 'package:http/http.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
@@ -45,7 +46,7 @@ class FDroidRepo extends AppSource {
   String sourceSpecificStandardizeURL(String url) {
     var standardUri = Uri.parse(url);
     var pathSegments = standardUri.pathSegments;
-    if (pathSegments.last == 'index.xml') {
+    if (pathSegments.isNotEmpty && pathSegments.last == 'index.xml') {
       pathSegments.removeLast();
       standardUri = standardUri.replace(path: pathSegments.join('/'));
     }
@@ -60,7 +61,7 @@ class FDroidRepo extends AppSource {
       throw NoReleasesError();
     }
     url = removeQueryParamsFromUrl(standardizeUrl(url));
-    var res = await sourceRequest('$url/index.xml', {});
+    var res = await sourceRequestWithURLVariants(url, {});
     if (res.statusCode == 200) {
       var body = parse(res.body);
       Map<String, List<String>> results = {};
@@ -72,7 +73,11 @@ class FDroidRepo extends AppSource {
             appId.contains(query) ||
             appName.contains(query) ||
             appDesc.contains(query)) {
-          results['$url?appId=$appId'] = [appName, appDesc];
+          results[
+              '${res.request!.url.toString().split('/').reversed.toList().sublist(1).reversed.join('/')}?appId=$appId'] = [
+            appName,
+            appDesc
+          ];
         }
       });
       return results;
@@ -102,6 +107,26 @@ class FDroidRepo extends AppSource {
     return app;
   }
 
+  Future<Response> sourceRequestWithURLVariants(
+    String url,
+    Map<String, dynamic> additionalSettings,
+  ) async {
+    var res = await sourceRequest(
+        '$url${url.endsWith('/index.xml') ? '' : '/index.xml'}',
+        additionalSettings);
+    if (res.statusCode != 200) {
+      var base = url.endsWith('/index.xml')
+          ? url.split('/').reversed.toList().sublist(1).reversed.join('/')
+          : url;
+      res = await sourceRequest('$base/repo/index.xml', additionalSettings);
+      if (res.statusCode != 200) {
+        res = await sourceRequest(
+            '$base/fdroid/repo/index.xml', additionalSettings);
+      }
+    }
+    return res;
+  }
+
   @override
   Future<APKDetails> getLatestAPKDetails(
     String standardUrl,
@@ -117,25 +142,8 @@ class FDroidRepo extends AppSource {
     if (appIdOrName == null) {
       throw NoReleasesError();
     }
-    var res = await sourceRequest(
-        '$standardUrl${standardUrl.endsWith('/index.xml') ? '' : '/index.xml'}',
-        additionalSettings);
-    if (res.statusCode != 200) {
-      var base = standardUrl.endsWith('/index.xml')
-          ? standardUrl
-              .split('/')
-              .reversed
-              .toList()
-              .sublist(1)
-              .reversed
-              .join('/')
-          : standardUrl;
-      res = await sourceRequest('$base/repo/index.xml', additionalSettings);
-      if (res.statusCode != 200) {
-        res = await sourceRequest(
-            '$base/fdroid/repo/index.xml', additionalSettings);
-      }
-    }
+    var res =
+        await sourceRequestWithURLVariants(standardUrl, additionalSettings);
     if (res.statusCode == 200) {
       var body = parse(res.body);
       var foundApps = body.querySelectorAll('application').where((element) {

lib/pages/add_app.dart

@@ -163,7 +163,7 @@ class AddAppPageState extends State<AddAppPage> {
           app = await sourceProvider.getApp(
               pickedSource!, userInput.trim(), additionalSettings,
               trackOnlyOverride: trackOnly,
-              overrideSource: pickedSourceOverride,
+              sourceIsOverriden: pickedSourceOverride != null,
               inferAppIdIfOptional: inferAppIdIfOptional);
           // Only download the APK here if you need to for the package ID
           if (isTempId(app) && app.additionalSettings['trackOnly'] != true) {

lib/pages/import_export.dart

@@ -213,7 +213,7 @@ class _ImportExportPageState extends State<ImportExportPage> {
           setState(() {
             importInProgress = true;
           });
-          if (values['url'] != source.hosts[0]) {
+          if (source.hosts.isEmpty || values['url'] != source.hosts[0]) {
             source = sourceProvider.getSource(values['url'],
                 overrideSource: source.runtimeType.toString());
           }

lib/providers/source_provider.dart

@@ -819,7 +819,7 @@ class SourceProvider {
       AppSource source, String url, Map<String, dynamic> additionalSettings,
       {App? currentApp,
       bool trackOnlyOverride = false,
-      String? overrideSource,
+      bool sourceIsOverriden = false,
       bool inferAppIdIfOptional = false}) async {
     if (trackOnlyOverride || source.enforceTrackOnly) {
       additionalSettings['trackOnly'] = true;
@@ -887,7 +887,9 @@ class SourceProvider {
         categories: currentApp?.categories ?? const [],
         releaseDate: apk.releaseDate,
         changeLog: apk.changeLog,
-        overrideSource: overrideSource ?? currentApp?.overrideSource,
+        overrideSource: sourceIsOverriden
+            ? source.runtimeType.toString()
+            : currentApp?.overrideSource,
         allowIdChange: currentApp?.allowIdChange ??
             trackOnly ||
                 (source.appIdInferIsOptional &&
@@ -911,6 +913,7 @@ class SourceProvider {
         apps.add(await getApp(
             source,
             url,
+            sourceIsOverriden: sourceOverride != null,
             getDefaultValuesFromFormItems(
                 source.combinedAppSpecificSettingFormItems)));
       } catch (e) {