Fixed error reporting in add app box

Can't get more granular due to flutter_local_notifications/issues/1700

android/app/src/main/AndroidManifest.xml

@@ -30,7 +30,25 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <service
+            android:name="dev.fluttercommunity.plus.androidalarmmanager.AlarmService"
+            android:permission="android.permission.BIND_JOB_SERVICE"
+            android:exported="false"/>
+        <receiver
+            android:name="dev.fluttercommunity.plus.androidalarmmanager.AlarmBroadcastReceiver"
+            android:exported="false"/>
+        <receiver
+            android:name="dev.fluttercommunity.plus.androidalarmmanager.RebootBroadcastReceiver"
+            android:enabled="false"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
     </application>
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>
 </manifest>

lib/app_sources/apkmirror.dart

@@ -1,112 +0,0 @@
-import 'package:html/parser.dart';
-import 'package:http/http.dart';
-import 'package:obtainium/components/generated_form.dart';
-import 'package:obtainium/providers/source_provider.dart';
-
-class APKMirror implements AppSource {
-  @override
-  late String host = 'apkmirror.com';
-
-  @override
-  String standardizeURL(String url) {
-    RegExp standardUrlRegEx = RegExp('^https?://$host/apk/[^/]+/[^/]+');
-    RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
-    if (match == null) {
-      throw notValidURL(runtimeType.toString());
-    }
-    return url.substring(0, match.end);
-  }
-
-  @override
-  String? changeLogPageFromStandardUrl(String standardUrl) =>
-      '$standardUrl#whatsnew';
-
-  @override
-  Future<String> apkUrlPrefetchModifier(String apkUrl) async {
-    var originalUri = Uri.parse(apkUrl);
-    var res = await get(originalUri);
-    if (res.statusCode != 200) {
-      throw false;
-    }
-    var href =
-        parse(res.body).querySelector('.downloadButton')?.attributes['href'];
-    if (href == null) {
-      throw false;
-    }
-    var res2 = await get(Uri.parse('${originalUri.origin}$href'), headers: {
-      'User-Agent':
-          'Mozilla/5.0 (X11; Linux x86_64; rv:105.0) Gecko/20100101 Firefox/105.0'
-    });
-    if (res2.statusCode != 200) {
-      throw false;
-    }
-    var links = parse(res2.body)
-        .querySelectorAll('a')
-        .where((element) => element.innerHtml == 'here')
-        .map((e) => e.attributes['href'])
-        .where((element) => element != null)
-        .toList();
-    if (links.isEmpty) {
-      throw false;
-    }
-    return '${originalUri.origin}${links[0]}';
-  }
-
-  @override
-  Future<APKDetails> getLatestAPKDetails(
-      String standardUrl, List<String> additionalData) async {
-    Response res = await get(Uri.parse('$standardUrl/feed'));
-    if (res.statusCode != 200) {
-      throw couldNotFindReleases;
-    }
-    var nextUrl = parse(res.body)
-        .querySelector('item')
-        ?.querySelector('link')
-        ?.nextElementSibling
-        ?.innerHtml;
-    if (nextUrl == null) {
-      throw couldNotFindReleases;
-    }
-    Response res2 = await get(Uri.parse(nextUrl), headers: {
-      'User-Agent':
-          'Mozilla/5.0 (X11; Linux x86_64; rv:105.0) Gecko/20100101 Firefox/105.0'
-    });
-    if (res2.statusCode != 200) {
-      throw couldNotFindReleases;
-    }
-    var html2 = parse(res2.body);
-    var origin = Uri.parse(standardUrl).origin;
-    List<String> apkUrls = html2
-        .querySelectorAll('.apkm-badge')
-        .map((e) => e.innerHtml != 'APK'
-            ? ''
-            : e.previousElementSibling?.attributes['href'] ?? '')
-        .where((element) => element.isNotEmpty)
-        .map((e) => '$origin$e')
-        .toList();
-    if (apkUrls.isEmpty) {
-      throw noAPKFound;
-    }
-    var version = html2.querySelector('span.active.accent_color')?.innerHtml;
-    if (version == null) {
-      throw couldNotFindLatestVersion;
-    }
-    return APKDetails(version, apkUrls);
-  }
-
-  @override
-  AppNames getAppNames(String standardUrl) {
-    String temp = standardUrl.substring(standardUrl.indexOf('://') + 3);
-    List<String> names = temp.substring(temp.indexOf('/') + 1).split('/');
-    return AppNames(names[1], names[2]);
-  }
-
-  @override
-  List<List<GeneratedFormItem>> additionalDataFormItems = [];
-
-  @override
-  List<String> additionalDataDefaults = [];
-
-  @override
-  List<GeneratedFormItem> moreSourceSettingsFormItems = [];
-}

lib/app_sources/fdroid.dart

@@ -1,6 +1,7 @@
 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';
 
 class FDroid implements AppSource {
@@ -18,7 +19,7 @@ class FDroid implements AppSource {
     RegExp standardUrlRegExA = RegExp('^https?://$host/+packages/+[^/]+');
     match = standardUrlRegExA.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -36,7 +37,7 @@ class FDroid implements AppSource {
     if (res.statusCode == 200) {
       var releases = parse(res.body).querySelectorAll('.package-version');
       if (releases.isEmpty) {
-        throw couldNotFindReleases;
+        throw NoReleasesError();
       }
       String? latestVersion = releases[0]
           .querySelector('.package-version-header b')
@@ -45,7 +46,7 @@ class FDroid implements AppSource {
           .sublist(1)
           .join(' ');
       if (latestVersion == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       List<String> apkUrls = releases
           .where((element) =>
@@ -64,11 +65,11 @@ class FDroid implements AppSource {
           .where((element) => element.isNotEmpty)
           .toList();
       if (apkUrls.isEmpty) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
       return APKDetails(latestVersion, apkUrls);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/github.dart

@@ -16,7 +16,7 @@ class GitHub implements AppSource {
     RegExp standardUrlRegEx = RegExp('^https?://$host/[^/]+/[^/]+');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -72,7 +72,7 @@ class GitHub implements AppSource {
 
         if (regexFilter != null &&
             !RegExp(regexFilter)
-                .hasMatch((releases[i]['tag_name'] as String).trim())) {
+                .hasMatch((releases[i]['name'] as String).trim())) {
           continue;
         }
         var apkUrls = getReleaseAPKUrls(releases[i]);
@@ -84,14 +84,14 @@ class GitHub implements AppSource {
         break;
       }
       if (targetRelease == null) {
-        throw couldNotFindReleases;
+        throw NoReleasesError();
       }
       if ((targetRelease['apkUrls'] as List<String>).isEmpty) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
       String? version = targetRelease['tag_name'];
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       return APKDetails(version, targetRelease['apkUrls']);
     } else {
@@ -102,7 +102,7 @@ class GitHub implements AppSource {
                 .round());
       }
 
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/gitlab.dart

@@ -2,6 +2,7 @@ import 'package:html/parser.dart';
 import 'package:http/http.dart';
 import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/components/generated_form.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
 class GitLab implements AppSource {
@@ -13,7 +14,7 @@ class GitLab implements AppSource {
     RegExp standardUrlRegEx = RegExp('^https?://$host/[^/]+/[^/]+');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -39,7 +40,9 @@ class GitLab implements AppSource {
         ...getLinksFromParsedHTML(
             entryContent,
             RegExp(
-                '^${escapeRegEx(standardUri.path)}/uploads/[^/]+/[^/]+\\.apk\$',
+                '^${standardUri.path.replaceAllMapped(RegExp(r'[.*+?^${}()|[\]\\]'), (x) {
+                  return '\\${x[0]}';
+                })}/uploads/[^/]+/[^/]+\\.apk\$',
                 caseSensitive: false),
             standardUri.origin),
         // GitLab releases may contain links to externally hosted APKs
@@ -49,18 +52,18 @@ class GitLab implements AppSource {
             .toList()
       ];
       if (apkUrlList.isEmpty) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
 
       var entryId = entry?.querySelector('id')?.innerHtml;
       var version =
           entryId == null ? null : Uri.parse(entryId).pathSegments.last;
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       return APKDetails(version, apkUrlList);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/izzyondroid.dart

@@ -1,6 +1,7 @@
 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';
 
 class IzzyOnDroid implements AppSource {
@@ -12,7 +13,7 @@ class IzzyOnDroid implements AppSource {
     RegExp standardUrlRegEx = RegExp('^https?://$host/repo/apk/[^/]+');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -37,7 +38,7 @@ class IzzyOnDroid implements AppSource {
           .map((e) => 'https://$host${e.attributes['href'] ?? ''}')
           .toList();
       if (multipleVersionApkUrls.isEmpty) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
       var version = parsedHtml
           .querySelector('#keydata')
@@ -50,11 +51,11 @@ class IzzyOnDroid implements AppSource {
           ?.children[1]
           .innerHtml;
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       return APKDetails(version, [multipleVersionApkUrls[0]]);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/mullvad.dart

@@ -1,6 +1,7 @@
 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';
 
 class Mullvad implements AppSource {
@@ -12,7 +13,7 @@ class Mullvad implements AppSource {
     RegExp standardUrlRegEx = RegExp('^https?://$host');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -36,12 +37,12 @@ class Mullvad implements AppSource {
           ?.split('/')
           .last;
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       return APKDetails(
           version, ['https://mullvad.net/download/app/apk/latest']);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/signal.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 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';
 
 class Signal implements AppSource {
@@ -27,15 +28,15 @@ class Signal implements AppSource {
       var json = jsonDecode(res.body);
       String? apkUrl = json['url'];
       if (apkUrl == null) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
       String? version = json['versionName'];
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       return APKDetails(version, [apkUrl]);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/app_sources/sourceforge.dart

@@ -1,6 +1,7 @@
 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';
 
 class SourceForge implements AppSource {
@@ -12,7 +13,7 @@ class SourceForge implements AppSource {
     RegExp standardUrlRegEx = RegExp('^https?://$host/projects/[^/]+');
     RegExpMatch? match = standardUrlRegEx.firstMatch(url.toLowerCase());
     if (match == null) {
-      throw notValidURL(runtimeType.toString());
+      throw InvalidURLError(runtimeType.toString());
     }
     return url.substring(0, match.end);
   }
@@ -42,7 +43,7 @@ class SourceForge implements AppSource {
 
       String? version = getVersion(allDownloadLinks[0]);
       if (version == null) {
-        throw couldNotFindLatestVersion;
+        throw NoVersionError();
       }
       var apkUrlListAllReleases = allDownloadLinks
           .where((element) => element.toLowerCase().endsWith('.apk/download'))
@@ -52,11 +53,11 @@ class SourceForge implements AppSource {
               .where((element) => getVersion(element) == version)
               .toList();
       if (apkUrlList.isEmpty) {
-        throw noAPKFound;
+        throw NoAPKError();
       }
       return APKDetails(version, apkUrlList);
     } else {
-      throw couldNotFindReleases;
+      throw NoReleasesError();
     }
   }
 

lib/custom_errors.dart

@@ -1,3 +1,15 @@
+import 'package:flutter/material.dart';
+import 'package:obtainium/providers/apps_provider.dart';
+
+class ObtainiumError {
+  late String message;
+  ObtainiumError(this.message);
+  @override
+  String toString() {
+    return message;
+  }
+}
+
 class RateLimitError {
   late int remainingMinutes;
   RateLimitError(this.remainingMinutes);
@@ -6,3 +18,97 @@ class RateLimitError {
   String toString() =>
       'Too many requests (rate limited) - try again in $remainingMinutes minutes';
 }
+
+class InvalidURLError extends ObtainiumError {
+  InvalidURLError(String sourceName) : super('Not a valid $sourceName App URL');
+}
+
+class NoReleasesError extends ObtainiumError {
+  NoReleasesError() : super('Could not find a suitable release');
+}
+
+class NoAPKError extends ObtainiumError {
+  NoAPKError() : super('Could not find a suitable release');
+}
+
+class NoVersionError extends ObtainiumError {
+  NoVersionError() : super('Could not determine release version');
+}
+
+class UnsupportedURLError extends ObtainiumError {
+  UnsupportedURLError() : super('URL does not match a known source');
+}
+
+class DowngradeError extends ObtainiumError {
+  DowngradeError() : super('Cannot install an older version of an App');
+}
+
+class IDChangedError extends ObtainiumError {
+  IDChangedError()
+      : super('Downloaded package ID does not match existing App ID');
+}
+
+class MultiAppMultiError extends ObtainiumError {
+  Map<String, List<String>> content = {};
+
+  MultiAppMultiError() : super('Multiple Errors Placeholder');
+
+  add(String appId, String string) {
+    var tempIds = content.remove(string);
+    tempIds ??= [];
+    tempIds.add(appId);
+    content.putIfAbsent(string, () => tempIds!);
+  }
+
+  @override
+  String toString() {
+    String finalString = '';
+    for (var e in content.keys) {
+      finalString += '$e: ${content[e].toString()}\n\n';
+    }
+    return finalString;
+  }
+}
+
+showError(dynamic e, BuildContext context) {
+  if (e is String || (e is ObtainiumError && e is! MultiAppMultiError)) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(content: Text(e.toString())),
+    );
+  } else {
+    showDialog(
+        context: context,
+        builder: (BuildContext ctx) {
+          return AlertDialog(
+            scrollable: true,
+            title: Text(e is MultiAppMultiError
+                ? 'Some Errors Occurred'
+                : 'Unexpected Error'),
+            content: Text(e.toString()),
+            actions: [
+              TextButton(
+                  onPressed: () {
+                    Navigator.of(context).pop(null);
+                  },
+                  child: const Text('Ok')),
+            ],
+          );
+        });
+  }
+}
+
+String list2FriendlyString(List<String> list) {
+  return list.length == 2
+      ? '${list[0]} and ${list[1]}'
+      : list
+          .asMap()
+          .entries
+          .map((e) =>
+              e.value +
+              (e.key == list.length - 1
+                  ? ''
+                  : e.key == list.length - 2
+                      ? ', and '
+                      : ', '))
+          .join('');
+}

lib/main.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -10,52 +11,52 @@ import 'package:obtainium/providers/settings_provider.dart';
 import 'package:obtainium/providers/source_provider.dart';
 import 'package:permission_handler/permission_handler.dart';
 import 'package:provider/provider.dart';
-import 'package:workmanager/workmanager.dart';
 import 'package:dynamic_color/dynamic_color.dart';
 import 'package:device_info_plus/device_info_plus.dart';
+import 'package:android_alarm_manager_plus/android_alarm_manager_plus.dart';
 
-const String currentVersion = '0.6.6';
+const String currentVersion = '0.6.10';
 const String currentReleaseTag =
     'v$currentVersion-beta'; // KEEP THIS IN SYNC WITH GITHUB RELEASES
 
-const String bgUpdateCheckTaskName = 'bg-update-check';
+const int bgUpdateCheckAlarmId = 666;
 
-bgUpdateCheck(int? ignoreAfterMicroseconds) async {
+@pragma('vm:entry-point')
+Future<void> bgUpdateCheck(int taskId, Map<String, dynamic>? params) async {
+  int? ignoreAfterMicroseconds = params?['ignoreAfterMicroseconds'];
   WidgetsFlutterBinding.ensureInitialized();
+  await AndroidAlarmManager.initialize();
   DateTime? ignoreAfter = ignoreAfterMicroseconds != null
       ? DateTime.fromMicrosecondsSinceEpoch(ignoreAfterMicroseconds)
       : null;
   var notificationsProvider = NotificationsProvider();
   await notificationsProvider.notify(checkingUpdatesNotification);
   try {
-    var appsProvider = AppsProvider();
+    var appsProvider = AppsProvider(forBGTask: true);
     await notificationsProvider.cancel(ErrorCheckingUpdatesNotification('').id);
-    await appsProvider.loadApps(shouldCorrectInstallStatus: false);
+    await appsProvider.loadApps();
     List<String> existingUpdateIds =
-        appsProvider.getExistingUpdates(installedOnly: true);
+        appsProvider.findExistingUpdates(installedOnly: true);
     DateTime nextIgnoreAfter = DateTime.now();
     String? err;
     try {
       await appsProvider.checkUpdates(
-          ignoreAfter: ignoreAfter,
-          immediatelyThrowRateLimitError: true,
-          immediatelyThrowSocketError: true,
-          shouldCorrectInstallStatus: false);
+          ignoreAppsCheckedAfter: ignoreAfter, throwErrorsForRetry: true);
     } catch (e) {
       if (e is RateLimitError || e is SocketException) {
-        String nextTaskName =
-            '$bgUpdateCheckTaskName-${nextIgnoreAfter.microsecondsSinceEpoch.toString()}';
-        Workmanager().registerOneOffTask(nextTaskName, nextTaskName,
-            constraints: Constraints(networkType: NetworkType.connected),
-            initialDelay: Duration(
-                minutes: e is RateLimitError ? e.remainingMinutes : 15),
-            inputData: {'ignoreAfter': nextIgnoreAfter.microsecondsSinceEpoch});
+        AndroidAlarmManager.oneShot(
+            Duration(minutes: e is RateLimitError ? e.remainingMinutes : 15),
+            Random().nextInt(pow(2, 31) as int),
+            bgUpdateCheck,
+            params: {
+              'ignoreAfterMicroseconds': nextIgnoreAfter.microsecondsSinceEpoch
+            });
       } else {
         err = e.toString();
       }
     }
     List<App> newUpdates = appsProvider
-        .getExistingUpdates(installedOnly: true)
+        .findExistingUpdates(installedOnly: true)
         .where((id) => !existingUpdateIds.contains(id))
         .map((e) => appsProvider.apps[e]!.app)
         .toList();
@@ -80,24 +81,14 @@ bgUpdateCheck(int? ignoreAfterMicroseconds) async {
     if (err != null) {
       throw err;
     }
-    return Future.value(true);
   } catch (e) {
     notificationsProvider
         .notify(ErrorCheckingUpdatesNotification(e.toString()));
-    return Future.error(false);
   } finally {
     await notificationsProvider.cancel(checkingUpdatesNotification.id);
   }
 }
 
-@pragma('vm:entry-point')
-void bgTaskCallback() {
-  // Background process callback
-  Workmanager().executeTask((task, inputData) async {
-    return await bgUpdateCheck(inputData?['ignoreAfter']);
-  });
-}
-
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   if ((await DeviceInfoPlugin().androidInfo).version.sdkInt >= 29) {
@@ -106,16 +97,10 @@ void main() async {
     );
     SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge);
   }
-  Workmanager().initialize(
-    bgTaskCallback,
-  );
+  await AndroidAlarmManager.initialize();
   runApp(MultiProvider(
     providers: [
-      ChangeNotifierProvider(
-          create: (context) => AppsProvider(
-              shouldLoadApps: true,
-              shouldCheckUpdatesAfterLoad: false,
-              shouldDeleteAPKs: true)),
+      ChangeNotifierProvider(create: (context) => AppsProvider()),
       ChangeNotifierProvider(create: (context) => SettingsProvider()),
       Provider(create: (context) => NotificationsProvider())
     ],
@@ -165,17 +150,14 @@ class _ObtainiumState extends State<Obtainium> {
       if (existingUpdateInterval != settingsProvider.updateInterval) {
         existingUpdateInterval = settingsProvider.updateInterval;
         if (existingUpdateInterval == 0) {
-          Workmanager().cancelByUniqueName(bgUpdateCheckTaskName);
+          AndroidAlarmManager.cancel(bgUpdateCheckAlarmId);
         } else {
-          Workmanager().registerPeriodicTask(
-              bgUpdateCheckTaskName, bgUpdateCheckTaskName,
-              frequency: Duration(minutes: existingUpdateInterval),
-              initialDelay: Duration(minutes: existingUpdateInterval),
-              constraints: Constraints(networkType: NetworkType.connected),
-              existingWorkPolicy: ExistingWorkPolicy.replace,
-              backoffPolicy: BackoffPolicy.linear,
-              backoffPolicyDelay:
-                  const Duration(minutes: minUpdateIntervalMinutes));
+          AndroidAlarmManager.periodic(
+              Duration(minutes: existingUpdateInterval),
+              bgUpdateCheckAlarmId,
+              bgUpdateCheck,
+              rescheduleOnReboot: true,
+              wakeup: true);
         }
       }
     }

lib/mass_app_sources/githubstars.dart

@@ -5,7 +5,7 @@ import 'package:obtainium/app_sources/github.dart';
 import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
-class GitHubStars implements MassAppSource {
+class GitHubStars implements MassAppUrlSource {
   @override
   late String name = 'GitHub Starred Repos';
 
@@ -28,14 +28,14 @@ class GitHubStars implements MassAppSource {
                 .round());
       }
 
-      throw 'Unable to find user\'s starred repos';
+      throw ObtainiumError('Unable to find user\'s starred repos');
     }
   }
 
   @override
   Future<List<String>> getUrls(List<String> args) async {
     if (args.length != requiredArgs.length) {
-      throw 'Wrong number of arguments provided';
+      throw ObtainiumError('Wrong number of arguments provided');
     }
     List<String> urls = [];
     var page = 1;

lib/pages/add_app.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:obtainium/components/custom_app_bar.dart';
 import 'package:obtainium/components/generated_form.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/pages/app.dart';
 import 'package:obtainium/providers/apps_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
@@ -56,7 +57,9 @@ class _AddAppPageState extends State<AddAppPage> {
                                               } catch (e) {
                                                 return e is String
                                                     ? e
-                                                    : 'Error';
+                                                    : e is ObtainiumError
+                                                        ? e.toString()
+                                                        : 'Error';
                                               }
                                               return null;
                                             }
@@ -76,7 +79,7 @@ class _AddAppPageState extends State<AddAppPage> {
                                             : [];
                                         validAdditionalData = source != null
                                             ? sourceProvider
-                                                .doesSourceHaveRequiredAdditionalData(
+                                                .ifSourceAppsRequireAdditionalData(
                                                     source)
                                             : true;
                                       }
@@ -114,21 +117,20 @@ class _AddAppPageState extends State<AddAppPage> {
                                                 .getInstallPermission();
                                             // ignore: use_build_context_synchronously
                                             var apkUrl = await appsProvider
-                                                .selectApkUrl(app, context);
+                                                .confirmApkUrl(app, context);
                                             if (apkUrl == null) {
-                                              throw 'Cancelled';
+                                              throw ObtainiumError('Cancelled');
                                             }
                                             app.preferredApkIndex =
                                                 app.apkUrls.indexOf(apkUrl);
                                             var downloadedApk =
-                                                await appsProvider.downloadApp(
-                                                    app,
-                                                    showOccasionalProgressToast:
-                                                        true);
+                                                await appsProvider
+                                                    .downloadApp(app);
                                             app.id = downloadedApk.appId;
                                             if (appsProvider.apps
                                                 .containsKey(app.id)) {
-                                              throw 'App already added';
+                                              throw ObtainiumError(
+                                                  'App already added');
                                             }
                                             await appsProvider.saveApps([app]);
 
@@ -142,11 +144,7 @@ class _AddAppPageState extends State<AddAppPage> {
                                                         AppPage(
                                                             appId: app.id)));
                                           }).catchError((e) {
-                                            ScaffoldMessenger.of(context)
-                                                .showSnackBar(
-                                              SnackBar(
-                                                  content: Text(e.toString())),
-                                            );
+                                            showError(e, context);
                                           }).whenComplete(() {
                                             setState(() {
                                               gettingAppInfo = false;
@@ -197,9 +195,6 @@ class _AddAppPageState extends State<AddAppPage> {
                                 crossAxisAlignment: CrossAxisAlignment.center,
                                 mainAxisAlignment: MainAxisAlignment.center,
                                 children: [
-                              // const SizedBox(
-                              //   height: 48,
-                              // ),
                               const Text(
                                 'Supported Sources:',
                               ),

lib/pages/app.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:obtainium/components/generated_form_modal.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/apps_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
 import 'package:obtainium/providers/source_provider.dart';
@@ -25,10 +26,8 @@ class _AppPageState extends State<AppPage> {
     var appsProvider = context.watch<AppsProvider>();
     var settingsProvider = context.watch<SettingsProvider>();
     getUpdate(String id) {
-      appsProvider.getUpdate(id).catchError((e) {
-        ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(e.toString())),
-        );
+      appsProvider.checkUpdate(id).catchError((e) {
+        showError(e, context);
       });
     }
 
@@ -217,9 +216,8 @@ class _AppPageState extends State<AppPage> {
                         Expanded(
                             child: ElevatedButton(
                                 onPressed: (app?.app.installedVersion == null ||
-                                            appsProvider
-                                                .checkAppObjectForUpdate(
-                                                    app!.app)) &&
+                                            app?.app.installedVersion !=
+                                                app?.app.latestVersion) &&
                                         !appsProvider.areDownloadsRunning()
                                     ? () {
                                         HapticFeedback.heavyImpact();
@@ -231,11 +229,7 @@ class _AppPageState extends State<AppPage> {
                                             Navigator.of(context).pop();
                                           }
                                         }).catchError((e) {
-                                          ScaffoldMessenger.of(context)
-                                              .showSnackBar(
-                                            SnackBar(
-                                                content: Text(e.toString())),
-                                          );
+                                          showError(e, context);
                                         });
                                       }
                                     : null,

lib/pages/apps.dart

@@ -3,6 +3,7 @@ import 'package:flutter/services.dart';
 import 'package:obtainium/components/custom_app_bar.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/components/generated_form_modal.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/pages/app.dart';
 import 'package:obtainium/providers/apps_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
@@ -120,7 +121,7 @@ class AppsPageState extends State<AppsPage> {
       sortedApps = sortedApps.reversed.toList();
     }
 
-    var existingUpdates = appsProvider.getExistingUpdates(installedOnly: true);
+    var existingUpdates = appsProvider.findExistingUpdates(installedOnly: true);
 
     var existingUpdateIdsAllOrSelected = existingUpdates
         .where((element) => selectedIds.isEmpty
@@ -128,7 +129,7 @@ class AppsPageState extends State<AppsPage> {
             : selectedIds.contains(element))
         .toList();
     var newInstallIdsAllOrSelected = appsProvider
-        .getExistingUpdates(nonInstalledOnly: true)
+        .findExistingUpdates(nonInstalledOnly: true)
         .where((element) => selectedIds.isEmpty
             ? sortedApps.where((a) => a.app.id == element).isNotEmpty
             : selectedIds.contains(element))
@@ -155,9 +156,7 @@ class AppsPageState extends State<AppsPage> {
               refreshingSince = DateTime.now();
             });
             return appsProvider.checkUpdates().catchError((e) {
-              ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text(e.toString())),
-              );
+              showError(e, context);
             }).whenComplete(() {
               setState(() {
                 refreshingSince = null;
@@ -380,9 +379,7 @@ class AppsPageState extends State<AppsPage> {
                                       .downloadAndInstallLatestApps(
                                           toInstall, context)
                                       .catchError((e) {
-                                    ScaffoldMessenger.of(context).showSnackBar(
-                                      SnackBar(content: Text(e.toString())),
-                                    );
+                                    showError(e, context);
                                   });
                                 });
                               }

lib/pages/home.dart

@@ -92,7 +92,6 @@ class _HomePageState extends State<HomePage> {
           return !(pages[0].widget.key as GlobalKey<AppsPageState>)
               .currentState
               ?.clearSelected();
-          // return !appsPageKey.currentState?.clearSelected();
         });
   }
 }

lib/pages/import_export.dart

@@ -6,6 +6,7 @@ import 'package:flutter/services.dart';
 import 'package:obtainium/components/custom_app_bar.dart';
 import 'package:obtainium/components/generated_form.dart';
 import 'package:obtainium/components/generated_form_modal.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/apps_provider.dart';
 import 'package:obtainium/providers/settings_provider.dart';
 import 'package:obtainium/providers/source_provider.dart';
@@ -81,12 +82,8 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                           appsProvider
                                               .exportApps()
                                               .then((String path) {
-                                            ScaffoldMessenger.of(context)
-                                                .showSnackBar(
-                                              SnackBar(
-                                                  content: Text(
-                                                      'Exported to $path')),
-                                            );
+                                            showError(
+                                                'Exported to $path', context);
                                           });
                                         },
                                   child: const Text('Obtainium Export'))),
@@ -113,27 +110,21 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                               try {
                                                 jsonDecode(data);
                                               } catch (e) {
-                                                throw 'Invalid input';
+                                                throw ObtainiumError(
+                                                    'Invalid input');
                                               }
                                               appsProvider
                                                   .importApps(data)
                                                   .then((value) {
-                                                ScaffoldMessenger.of(context)
-                                                    .showSnackBar(
-                                                  SnackBar(
-                                                      content: Text(
-                                                          '$value App${value == 1 ? '' : 's'} Imported')),
-                                                );
+                                                showError(
+                                                    '$value App${value == 1 ? '' : 's'} Imported',
+                                                    context);
                                               });
                                             } else {
                                               // User canceled the picker
                                             }
                                           }).catchError((e) {
-                                            ScaffoldMessenger.of(context)
-                                                .showSnackBar(
-                                              SnackBar(
-                                                  content: Text(e.toString())),
-                                            );
+                                            showError(e, context);
                                           }).whenComplete(() {
                                             setState(() {
                                               importInProgress = false;
@@ -208,12 +199,9 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                       });
                                       addApps(urls).then((errors) {
                                         if (errors.isEmpty) {
-                                          ScaffoldMessenger.of(context)
-                                              .showSnackBar(
-                                            SnackBar(
-                                                content: Text(
-                                                    'Imported ${urls.length} Apps')),
-                                          );
+                                          showError(
+                                              'Imported ${urls.length} Apps',
+                                              context);
                                         } else {
                                           showDialog(
                                               context: context,
@@ -224,10 +212,7 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                               });
                                         }
                                       }).catchError((e) {
-                                        ScaffoldMessenger.of(context)
-                                            .showSnackBar(
-                                          SnackBar(content: Text(e.toString())),
-                                        );
+                                        showError(e, context);
                                       }).whenComplete(() {
                                         setState(() {
                                           importInProgress = false;
@@ -239,7 +224,7 @@ class _ImportExportPageState extends State<ImportExportPage> {
                           child: const Text(
                             'Import from URL List',
                           )),
-                      ...sourceProvider.massSources
+                      ...sourceProvider.massUrlSources
                           .map((source) => Column(
                                   crossAxisAlignment:
                                       CrossAxisAlignment.stretch,
@@ -288,13 +273,9 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                                               .then((errors) {
                                                             if (errors
                                                                 .isEmpty) {
-                                                              ScaffoldMessenger
-                                                                      .of(context)
-                                                                  .showSnackBar(
-                                                                SnackBar(
-                                                                    content: Text(
-                                                                        'Imported ${selectedUrls.length} Apps')),
-                                                              );
+                                                              showError(
+                                                                  'Imported ${selectedUrls.length} Apps',
+                                                                  context);
                                                             } else {
                                                               showDialog(
                                                                   context:
@@ -328,13 +309,7 @@ class _ImportExportPageState extends State<ImportExportPage> {
                                                         importInProgress =
                                                             false;
                                                       });
-                                                      ScaffoldMessenger.of(
-                                                              context)
-                                                          .showSnackBar(
-                                                        SnackBar(
-                                                            content: Text(
-                                                                e.toString())),
-                                                      );
+                                                      showError(e, context);
                                                     });
                                                   }
                                                 });

lib/pages/settings.dart

@@ -21,6 +21,143 @@ class _SettingsPageState extends State<SettingsPage> {
     if (settingsProvider.prefs == null) {
       settingsProvider.initializeSettings();
     }
+
+    var themeDropdown = DropdownButtonFormField(
+        decoration: const InputDecoration(labelText: 'Theme'),
+        value: settingsProvider.theme,
+        items: const [
+          DropdownMenuItem(
+            value: ThemeSettings.dark,
+            child: Text('Dark'),
+          ),
+          DropdownMenuItem(
+            value: ThemeSettings.light,
+            child: Text('Light'),
+          ),
+          DropdownMenuItem(
+            value: ThemeSettings.system,
+            child: Text('Follow System'),
+          )
+        ],
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.theme = value;
+          }
+        });
+
+    var colourDropdown = DropdownButtonFormField(
+        decoration: const InputDecoration(labelText: 'Colour'),
+        value: settingsProvider.colour,
+        items: const [
+          DropdownMenuItem(
+            value: ColourSettings.basic,
+            child: Text('Obtainium'),
+          ),
+          DropdownMenuItem(
+            value: ColourSettings.materialYou,
+            child: Text('Material You'),
+          )
+        ],
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.colour = value;
+          }
+        });
+
+    var sortDropdown = DropdownButtonFormField(
+        decoration: const InputDecoration(labelText: 'App Sort By'),
+        value: settingsProvider.sortColumn,
+        items: const [
+          DropdownMenuItem(
+            value: SortColumnSettings.authorName,
+            child: Text('Author/Name'),
+          ),
+          DropdownMenuItem(
+            value: SortColumnSettings.nameAuthor,
+            child: Text('Name/Author'),
+          ),
+          DropdownMenuItem(
+            value: SortColumnSettings.added,
+            child: Text('As Added'),
+          )
+        ],
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.sortColumn = value;
+          }
+        });
+
+    var orderDropdown = DropdownButtonFormField(
+        decoration: const InputDecoration(labelText: 'App Sort Order'),
+        value: settingsProvider.sortOrder,
+        items: const [
+          DropdownMenuItem(
+            value: SortOrderSettings.ascending,
+            child: Text('Ascending'),
+          ),
+          DropdownMenuItem(
+            value: SortOrderSettings.descending,
+            child: Text('Descending'),
+          ),
+        ],
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.sortOrder = value;
+          }
+        });
+
+    var intervalDropdown = DropdownButtonFormField(
+        decoration: const InputDecoration(
+            labelText: 'Background Update Checking Interval'),
+        value: settingsProvider.updateInterval,
+        items: updateIntervals.map((e) {
+          int displayNum = (e < 60
+                  ? e
+                  : e < 1440
+                      ? e / 60
+                      : e / 1440)
+              .round();
+          var displayUnit = (e < 60
+              ? 'Minute'
+              : e < 1440
+                  ? 'Hour'
+                  : 'Day');
+
+          String display = e == 0
+              ? 'Never - Manual Only'
+              : '$displayNum $displayUnit${displayNum == 1 ? '' : 's'}';
+          return DropdownMenuItem(value: e, child: Text(display));
+        }).toList(),
+        onChanged: (value) {
+          if (value != null) {
+            settingsProvider.updateInterval = value;
+          }
+        });
+
+    var sourceSpecificFields = sourceProvider.sources.map((e) {
+      if (e.moreSourceSettingsFormItems.isNotEmpty) {
+        return GeneratedForm(
+            items: e.moreSourceSettingsFormItems.map((e) => [e]).toList(),
+            onValueChanges: (values, valid) {
+              if (valid) {
+                for (var i = 0; i < values.length; i++) {
+                  settingsProvider.setSettingString(
+                      e.moreSourceSettingsFormItems[i].id, values[i]);
+                }
+              }
+            },
+            defaultValues: e.moreSourceSettingsFormItems.map((e) {
+              return settingsProvider.getSettingString(e.id) ?? '';
+            }).toList());
+      } else {
+        return Container();
+      }
+    });
+
+    const height16 = SizedBox(
+      height: 16,
+    );
+
     return Scaffold(
         backgroundColor: Theme.of(context).colorScheme.surface,
         body: CustomScrollView(slivers: <Widget>[
@@ -38,112 +175,22 @@ class _SettingsPageState extends State<SettingsPage> {
                               style: TextStyle(
                                   color: Theme.of(context).colorScheme.primary),
                             ),
-                            DropdownButtonFormField(
-                                decoration:
-                                    const InputDecoration(labelText: 'Theme'),
-                                value: settingsProvider.theme,
-                                items: const [
-                                  DropdownMenuItem(
-                                    value: ThemeSettings.dark,
-                                    child: Text('Dark'),
-                                  ),
-                                  DropdownMenuItem(
-                                    value: ThemeSettings.light,
-                                    child: Text('Light'),
-                                  ),
-                                  DropdownMenuItem(
-                                    value: ThemeSettings.system,
-                                    child: Text('Follow System'),
-                                  )
-                                ],
-                                onChanged: (value) {
-                                  if (value != null) {
-                                    settingsProvider.theme = value;
-                                  }
-                                }),
-                            const SizedBox(
-                              height: 16,
-                            ),
-                            DropdownButtonFormField(
-                                decoration:
-                                    const InputDecoration(labelText: 'Colour'),
-                                value: settingsProvider.colour,
-                                items: const [
-                                  DropdownMenuItem(
-                                    value: ColourSettings.basic,
-                                    child: Text('Obtainium'),
-                                  ),
-                                  DropdownMenuItem(
-                                    value: ColourSettings.materialYou,
-                                    child: Text('Material You'),
-                                  )
-                                ],
-                                onChanged: (value) {
-                                  if (value != null) {
-                                    settingsProvider.colour = value;
-                                  }
-                                }),
-                            const SizedBox(
-                              height: 16,
-                            ),
+                            themeDropdown,
+                            height16,
+                            colourDropdown,
+                            height16,
                             Row(
                               mainAxisAlignment: MainAxisAlignment.start,
                               crossAxisAlignment: CrossAxisAlignment.start,
                               children: [
-                                Expanded(
-                                    child: DropdownButtonFormField(
-                                        decoration: const InputDecoration(
-                                            labelText: 'App Sort By'),
-                                        value: settingsProvider.sortColumn,
-                                        items: const [
-                                          DropdownMenuItem(
-                                            value:
-                                                SortColumnSettings.authorName,
-                                            child: Text('Author/Name'),
-                                          ),
-                                          DropdownMenuItem(
-                                            value:
-                                                SortColumnSettings.nameAuthor,
-                                            child: Text('Name/Author'),
-                                          ),
-                                          DropdownMenuItem(
-                                            value: SortColumnSettings.added,
-                                            child: Text('As Added'),
-                                          )
-                                        ],
-                                        onChanged: (value) {
-                                          if (value != null) {
-                                            settingsProvider.sortColumn = value;
-                                          }
-                                        })),
+                                Expanded(child: sortDropdown),
                                 const SizedBox(
                                   width: 16,
                                 ),
-                                Expanded(
-                                    child: DropdownButtonFormField(
-                                        decoration: const InputDecoration(
-                                            labelText: 'App Sort Order'),
-                                        value: settingsProvider.sortOrder,
-                                        items: const [
-                                          DropdownMenuItem(
-                                            value: SortOrderSettings.ascending,
-                                            child: Text('Ascending'),
-                                          ),
-                                          DropdownMenuItem(
-                                            value: SortOrderSettings.descending,
-                                            child: Text('Descending'),
-                                          ),
-                                        ],
-                                        onChanged: (value) {
-                                          if (value != null) {
-                                            settingsProvider.sortOrder = value;
-                                          }
-                                        })),
+                                Expanded(child: orderDropdown),
                               ],
                             ),
-                            const SizedBox(
-                              height: 16,
-                            ),
+                            height16,
                             Row(
                               mainAxisAlignment: MainAxisAlignment.spaceBetween,
                               children: [
@@ -155,9 +202,7 @@ class _SettingsPageState extends State<SettingsPage> {
                                     })
                               ],
                             ),
-                            const SizedBox(
-                              height: 16,
-                            ),
+                            height16,
                             Row(
                               mainAxisAlignment: MainAxisAlignment.spaceBetween,
                               children: [
@@ -172,54 +217,13 @@ class _SettingsPageState extends State<SettingsPage> {
                             const Divider(
                               height: 16,
                             ),
-                            const SizedBox(
-                              height: 16,
-                            ),
+                            height16,
                             Text(
                               'Updates',
                               style: TextStyle(
                                   color: Theme.of(context).colorScheme.primary),
                             ),
-                            DropdownButtonFormField(
-                                decoration: const InputDecoration(
-                                    labelText:
-                                        'Background Update Checking Interval'),
-                                value: settingsProvider.updateInterval,
-                                items: updateIntervals.map((e) {
-                                  int displayNum = (e < 60
-                                          ? e
-                                          : e < 1440
-                                              ? e / 60
-                                              : e / 1440)
-                                      .round();
-                                  var displayUnit = (e < 60
-                                      ? 'Minute'
-                                      : e < 1440
-                                          ? 'Hour'
-                                          : 'Day');
-
-                                  String display = e == 0
-                                      ? 'Never - Manual Only'
-                                      : '$displayNum $displayUnit${displayNum == 1 ? '' : 's'}';
-                                  return DropdownMenuItem(
-                                      value: e, child: Text(display));
-                                }).toList(),
-                                onChanged: (value) {
-                                  if (value != null) {
-                                    settingsProvider.updateInterval = value;
-                                  }
-                                }),
-                            const SizedBox(
-                              height: 8,
-                            ),
-                            Text(
-                              'Longer intervals may result in less reliable behaviour',
-                              style: Theme.of(context)
-                                  .textTheme
-                                  .labelMedium!
-                                  .merge(const TextStyle(
-                                      fontStyle: FontStyle.italic)),
-                            ),
+                            intervalDropdown,
                             const Divider(
                               height: 48,
                             ),
@@ -228,42 +232,13 @@ class _SettingsPageState extends State<SettingsPage> {
                               style: TextStyle(
                                   color: Theme.of(context).colorScheme.primary),
                             ),
-                            ...sourceProvider.sources.map((e) {
-                              if (e.moreSourceSettingsFormItems.isNotEmpty) {
-                                return GeneratedForm(
-                                    items: e.moreSourceSettingsFormItems
-                                        .map((e) => [e])
-                                        .toList(),
-                                    onValueChanges: (values, valid) {
-                                      if (valid) {
-                                        for (var i = 0;
-                                            i < values.length;
-                                            i++) {
-                                          settingsProvider.setSettingString(
-                                              e.moreSourceSettingsFormItems[i]
-                                                  .id,
-                                              values[i]);
-                                        }
-                                      }
-                                    },
-                                    defaultValues:
-                                        e.moreSourceSettingsFormItems.map((e) {
-                                      return settingsProvider
-                                              .getSettingString(e.id) ??
-                                          '';
-                                    }).toList());
-                              } else {
-                                return Container();
-                              }
-                            }),
+                            ...sourceSpecificFields,
                           ],
                         ))),
           SliverToBoxAdapter(
             child: Column(
               children: [
-                const SizedBox(
-                  height: 16,
-                ),
+                height16,
                 TextButton.icon(
                   style: ButtonStyle(
                     foregroundColor: MaterialStateProperty.resolveWith<Color>(
@@ -281,9 +256,7 @@ class _SettingsPageState extends State<SettingsPage> {
                     style: Theme.of(context).textTheme.bodySmall,
                   ),
                 ),
-                const SizedBox(
-                  height: 16,
-                ),
+                height16,
               ],
             ),
           )

lib/providers/apps_provider.dart

@@ -25,15 +25,15 @@ import 'package:http/http.dart';
 class AppInMemory {
   late App app;
   double? downloadProgress;
-  AppInfo? installedInfo; // Also indicates that an App is installed
+  AppInfo? installedInfo;
 
   AppInMemory(this.app, this.downloadProgress, this.installedInfo);
 }
 
-class DownloadedApp {
+class DownloadedApk {
   String appId;
   File file;
-  DownloadedApp(this.appId, this.file);
+  DownloadedApk(this.appId, this.file);
 }
 
 class AppsProvider with ChangeNotifier {
@@ -41,124 +41,112 @@ class AppsProvider with ChangeNotifier {
   Map<String, AppInMemory> apps = {};
   bool loadingApps = false;
   bool gettingUpdates = false;
+  bool forBGTask = false;
 
   // Variables to keep track of the app foreground status (installs can't run in the background)
   bool isForeground = true;
   late Stream<FGBGType>? foregroundStream;
   late StreamSubscription<FGBGType>? foregroundSubscription;
 
-  AppsProvider(
-      {bool shouldLoadApps = false,
-      bool shouldCheckUpdatesAfterLoad = false,
-      bool shouldDeleteAPKs = false}) {
-    if (shouldLoadApps) {
+  AppsProvider({this.forBGTask = false}) {
+    // Many setup tasks should only be done in the foreground isolate
+    if (!forBGTask) {
       // Subscribe to changes in the app foreground status
       foregroundStream = FGBGEvents.stream.asBroadcastStream();
       foregroundSubscription = foregroundStream?.listen((event) async {
         isForeground = event == FGBGType.foreground;
         if (isForeground) await loadApps();
       });
-      loadApps().then((_) {
-        if (shouldDeleteAPKs) {
-          deleteSavedAPKs();
-        }
-        if (shouldCheckUpdatesAfterLoad) {
-          checkUpdates();
-        }
-      });
+      () async {
+        // Load Apps into memory (in background, this is done later instead of in the constructor)
+        await loadApps();
+        // Delete existing APKs
+        (await getExternalStorageDirectory())
+            ?.listSync()
+            .where((element) => element.path.endsWith('.apk'))
+            .forEach((apk) {
+          apk.delete();
+        });
+      }();
     }
   }
 
-  downloadApk(String apkUrl, String fileName, Function? onProgress,
-      Function? urlModifier) async {
-    bool useExistingIfExists =
-        false; // This should be an function argument, but isn't because of the partially downloaded APK issue
+  downloadFile(String url, String fileName, Function? onProgress) async {
     var destDir = (await getExternalStorageDirectory())!.path;
-    if (urlModifier != null) {
-      apkUrl = await urlModifier(apkUrl);
-    }
     StreamedResponse response =
-        await Client().send(Request('GET', Uri.parse(apkUrl)));
-    File downloadFile = File('$destDir/$fileName.apk');
-    var alreadyExists = downloadFile.existsSync();
-    if (!alreadyExists || !useExistingIfExists) {
-      if (alreadyExists) {
-        downloadFile.deleteSync();
-      }
+        await Client().send(Request('GET', Uri.parse(url)));
+    File downloadedFile = File('$destDir/$fileName');
 
-      var length = response.contentLength;
-      var received = 0;
-      double? progress;
-      var sink = downloadFile.openWrite();
+    if (downloadedFile.existsSync()) {
+      downloadedFile.deleteSync();
+    }
+    var length = response.contentLength;
+    var received = 0;
+    double? progress;
+    var sink = downloadedFile.openWrite();
 
-      await response.stream.map((s) {
-        received += s.length;
-        progress = (length != null ? received / length * 100 : 30);
-        if (onProgress != null) {
-          onProgress(progress);
-        }
-        return s;
-      }).pipe(sink);
-
-      await sink.close();
-      progress = null;
+    await response.stream.map((s) {
+      received += s.length;
+      progress = (length != null ? received / length * 100 : 30);
       if (onProgress != null) {
         onProgress(progress);
       }
+      return s;
+    }).pipe(sink);
 
-      if (response.statusCode != 200) {
-        downloadFile.deleteSync();
-        throw response.reasonPhrase ?? 'Unknown Error';
-      }
+    await sink.close();
+    progress = null;
+    if (onProgress != null) {
+      onProgress(progress);
     }
-    return downloadFile;
+
+    if (response.statusCode != 200) {
+      downloadedFile.deleteSync();
+      throw response.reasonPhrase ?? 'Unknown Error';
+    }
+    return downloadedFile;
   }
 
-  // Downloads the App (preferred URL) and returns an ApkFile object
-  // If the app was already saved, updates it's download progress % in memory
-  // But also works for Apps that are not saved
-  Future<DownloadedApp> downloadApp(App app,
-      {bool showOccasionalProgressToast = false}) async {
+  Future<DownloadedApk> downloadApp(App app) async {
+    var fileName =
+        '${app.id}-${app.latestVersion}-${app.preferredApkIndex}.apk';
+    String downloadUrl = await SourceProvider()
+        .getSource(app.url)
+        .apkUrlPrefetchModifier(app.apkUrls[app.preferredApkIndex]);
     int? prevProg;
-    var fileName = '${app.id}-${app.latestVersion}-${app.preferredApkIndex}';
-    File downloadFile = await downloadApk(app.apkUrls[app.preferredApkIndex],
-        '${app.id}-${app.latestVersion}-${app.preferredApkIndex}',
-        (double? progress) {
+    File downloadedFile =
+        await downloadFile(downloadUrl, fileName, (double? progress) {
+      int? prog = progress?.ceil();
       if (apps[app.id] != null) {
         apps[app.id]!.downloadProgress = progress;
-      }
-      int? prog = progress?.ceil();
-      if (showOccasionalProgressToast &&
-          (prog == 25 || prog == 50 || prog == 75) &&
-          prevProg != prog) {
+        notifyListeners();
+      } else if ((prog == 25 || prog == 50 || prog == 75) && prevProg != prog) {
         Fluttertoast.showToast(
             msg: 'Progress: $prog%', toastLength: Toast.LENGTH_SHORT);
       }
       prevProg = prog;
-      notifyListeners();
-    }, SourceProvider().getSource(app.url).apkUrlPrefetchModifier);
+    });
     // Delete older versions of the APK if any
-    for (var file in downloadFile.parent.listSync()) {
+    for (var file in downloadedFile.parent.listSync()) {
       var fn = file.path.split('/').last;
       if (fn.startsWith('${app.id}-') &&
           fn.endsWith('.apk') &&
-          fn != '$fileName.apk') {
+          fn != fileName) {
         file.delete();
       }
     }
-    // If the ID has changed (as it should on first download), replace it
-    var newInfo = await PackageArchiveInfo.fromPath(downloadFile.path);
+    // If the APK package ID is different from the App ID, it is either new (using a placeholder ID) or the ID has changed
+    // The former case should be handled (give the App its real ID), the latter is a security issue
+    var newInfo = await PackageArchiveInfo.fromPath(downloadedFile.path);
     if (app.id != newInfo.packageName) {
-      var originalAppId = app.id;
-      app.id = newInfo.packageName;
-      downloadFile = downloadFile.renameSync(
-          '${downloadFile.parent.path}/${app.id}-${app.latestVersion}-${app.preferredApkIndex}.apk');
-      if (apps[originalAppId] != null) {
-        await removeApps([originalAppId]);
-        await saveApps([app]);
+      if (apps[app.id] != null) {
+        throw IDChangedError();
       }
+      app.id = newInfo.packageName;
+      downloadedFile = downloadedFile.renameSync(
+          '${downloadedFile.parent.path}/${app.id}-${app.latestVersion}-${app.preferredApkIndex}.apk');
     }
-    return DownloadedApp(app.id, downloadFile);
+    return DownloadedApk(app.id, downloadedFile);
   }
 
   bool areDownloadsRunning() => apps.values
@@ -166,24 +154,26 @@ class AppsProvider with ChangeNotifier {
       .isNotEmpty;
 
   Future<bool> canInstallSilently(App app) async {
-    // TODO: This is unreliable - try to get from OS in the future
-    var osInfo = await DeviceInfoPlugin().androidInfo;
-    return app.installedVersion != null &&
-        osInfo.version.sdkInt >= 30 &&
-        osInfo.version.release.compareTo('12') >= 0;
+    return false;
+    // TODO: Uncomment the below once silentupdates are ever figured out
+    // // TODO: This is unreliable - try to get from OS in the future
+    // if (app.apkUrls.length > 1) {
+    //    return false;
+    // }
+    // var osInfo = await DeviceInfoPlugin().androidInfo;
+    // return app.installedVersion != null &&
+    //     osInfo.version.sdkInt >= 30 &&
+    //     osInfo.version.release.compareTo('12') >= 0;
   }
 
-  Future<void> askUserToReturnToForeground(BuildContext context,
-      {bool waitForFG = false}) async {
+  Future<void> waitForUserToReturnToForeground(BuildContext context) async {
     NotificationsProvider notificationsProvider =
         context.read<NotificationsProvider>();
     if (!isForeground) {
       await notificationsProvider.notify(completeInstallationNotification,
           cancelExisting: true);
-      if (waitForFG) {
-        await FGBGEvents.stream.first == FGBGType.foreground;
-        await notificationsProvider.cancel(completeInstallationNotification.id);
-      }
+      while (await FGBGEvents.stream.first != FGBGType.foreground) {}
+      await notificationsProvider.cancel(completeInstallationNotification.id);
     }
   }
 
@@ -191,7 +181,7 @@ class AppsProvider with ChangeNotifier {
   // So we only know that the install prompt was shown, but the user could still cancel w/o us knowing
   // If appropriate criteria are met, the update (never a fresh install) happens silently  in the background
   // But even then, we don't know if it actually succeeded
-  Future<void> installApk(DownloadedApp file) async {
+  Future<void> installApk(DownloadedApk file) async {
     var newInfo = await PackageArchiveInfo.fromPath(file.file.path);
     AppInfo? appInfo;
     try {
@@ -201,7 +191,7 @@ class AppsProvider with ChangeNotifier {
     }
     if (appInfo != null &&
         int.parse(newInfo.buildNumber) < appInfo.versionCode!) {
-      throw 'Can\'t install an older version';
+      throw DowngradeError();
     }
     if (appInfo == null ||
         int.parse(newInfo.buildNumber) > appInfo.versionCode!) {
@@ -210,17 +200,25 @@ class AppsProvider with ChangeNotifier {
     apps[file.appId]!.app.installedVersion =
         apps[file.appId]!.app.latestVersion;
     // Don't correct install status as installation may not be done yet
-    await saveApps([apps[file.appId]!.app], shouldCorrectInstallStatus: false);
+    await saveApps([apps[file.appId]!.app],
+        attemptToCorrectInstallStatus: false);
   }
 
-  Future<String?> selectApkUrl(App app, BuildContext? context) async {
+  Future<String?> confirmApkUrl(App app, BuildContext? context) async {
     // If the App has more than one APK, the user should pick one (if context provided)
     String? apkUrl = app.apkUrls[app.preferredApkIndex];
+    // get device supported architecture
+    List<String> archs = (await DeviceInfoPlugin().androidInfo).supportedAbis;
+
     if (app.apkUrls.length > 1 && context != null) {
       apkUrl = await showDialog(
           context: context,
           builder: (BuildContext ctx) {
-            return APKPicker(app: app, initVal: apkUrl);
+            return APKPicker(
+              app: app,
+              initVal: apkUrl,
+              archs: archs,
+            );
           });
     }
     // If the picked APK comes from an origin different from the source, get user confirmation (if context provided)
@@ -240,15 +238,6 @@ class AppsProvider with ChangeNotifier {
     return apkUrl;
   }
 
-  Map<String, List<String>> addToErrorMap(
-      Map<String, List<String>> errors, String appId, String error) {
-    var tempIds = errors.remove(error);
-    tempIds ??= [];
-    tempIds.add(appId);
-    errors.putIfAbsent(error, () => tempIds!);
-    return errors;
-  }
-
   // Given a list of AppIds, uses stored info about the apps to download APKs and install them
   // If the APKs can be installed silently, they are
   // If no BuildContext is provided, apps that require user interaction are ignored
@@ -257,42 +246,41 @@ class AppsProvider with ChangeNotifier {
   Future<List<String>> downloadAndInstallLatestApps(
       List<String> appIds, BuildContext? context) async {
     List<String> appsToInstall = [];
+    // For all specified Apps, filter out those for which:
+    // 1. A URL cannot be picked
+    // 2. That cannot be installed silently (IF no buildContext was given for interactive install)
     for (var id in appIds) {
       if (apps[id] == null) {
-        throw 'App not found';
+        throw ObtainiumError('App not found');
       }
-
-      String? apkUrl = await selectApkUrl(apps[id]!.app, context);
-
+      String? apkUrl = await confirmApkUrl(apps[id]!.app, context);
       if (apkUrl != null) {
         int urlInd = apps[id]!.app.apkUrls.indexOf(apkUrl);
         if (urlInd != apps[id]!.app.preferredApkIndex) {
           apps[id]!.app.preferredApkIndex = urlInd;
           await saveApps([apps[id]!.app]);
         }
-        if (context != null ||
-            (await canInstallSilently(apps[id]!.app) &&
-                apps[id]!.app.apkUrls.length == 1)) {
+        if (context != null || await canInstallSilently(apps[id]!.app)) {
           appsToInstall.add(id);
         }
       }
     }
-    Map<String, List<String>> errors = {};
-
-    List<DownloadedApp?> downloadedFiles =
+    // Download APKs for all Apps to be installed
+    MultiAppMultiError errors = MultiAppMultiError();
+    List<DownloadedApk?> downloadedFiles =
         await Future.wait(appsToInstall.map((id) async {
       try {
         return await downloadApp(apps[id]!.app);
       } catch (e) {
-        addToErrorMap(errors, id, e.toString());
+        errors.add(id, e.toString());
       }
       return null;
     }));
     downloadedFiles =
         downloadedFiles.where((element) => element != null).toList();
-
-    List<DownloadedApp> silentUpdates = [];
-    List<DownloadedApp> regularInstalls = [];
+    // Separate the Apps to install into silent and regular lists
+    List<DownloadedApk> silentUpdates = [];
+    List<DownloadedApk> regularInstalls = [];
     for (var f in downloadedFiles) {
       bool willBeSilent = await canInstallSilently(apps[f!.appId]!.app);
       if (willBeSilent) {
@@ -302,10 +290,13 @@ class AppsProvider with ChangeNotifier {
       }
     }
 
+    // Move everything to the regular install list (since silent updates don't currently work) - TODO
+    regularInstalls.addAll(silentUpdates);
+
     // If Obtainium is being installed, it should be the last one
-    List<DownloadedApp> moveObtainiumToStart(List<DownloadedApp> items) {
+    List<DownloadedApk> moveObtainiumToStart(List<DownloadedApk> items) {
       String obtainiumId = 'imranr98_obtainium_${GitHub().host}';
-      DownloadedApp? temp;
+      DownloadedApk? temp;
       items.removeWhere((element) {
         bool res = element.appId == obtainiumId;
         if (res) {
@@ -319,39 +310,33 @@ class AppsProvider with ChangeNotifier {
       return items;
     }
 
-    // TODO: Remove below line if silentupdates are ever figured out
-    regularInstalls.addAll(silentUpdates);
-
     silentUpdates = moveObtainiumToStart(silentUpdates);
     regularInstalls = moveObtainiumToStart(regularInstalls);
 
-    // TODO: Uncomment below if silentupdates are ever figured out
+    // // Install silent updates (uncomment when it works - TODO)
     // for (var u in silentUpdates) {
     //   await installApk(u, silent: true); // Would need to add silent option
     // }
 
-    if (context != null) {
-      if (regularInstalls.isNotEmpty) {
-        // ignore: use_build_context_synchronously
-        await askUserToReturnToForeground(context, waitForFG: true);
-      }
+    // Do regular installs
+    if (regularInstalls.isNotEmpty && context != null) {
+      // ignore: use_build_context_synchronously
+      await waitForUserToReturnToForeground(context);
       for (var i in regularInstalls) {
         try {
           await installApk(i);
         } catch (e) {
-          addToErrorMap(errors, i.appId, e.toString());
+          errors.add(i.appId, e.toString());
         }
       }
     }
-    if (errors.isNotEmpty) {
-      String finalError = '';
-      for (var e in errors.keys) {
-        finalError +=
-            '$e ${errors[e]!.map((e) => apps[e]!.app.name).toString()}. ';
-      }
-      throw finalError;
+
+    if (errors.content.isNotEmpty) {
+      throw errors;
     }
 
+    NotificationsProvider().cancel(UpdateNotification([]).id);
+
     return downloadedFiles.map((e) => e!.appId).toList();
   }
 
@@ -364,40 +349,6 @@ class AppsProvider with ChangeNotifier {
     return appsDir;
   }
 
-  // Delete all stored APKs except those likely to still be needed
-  Future<void> deleteSavedAPKs() async {
-    List<FileSystemEntity>? apks = (await getExternalStorageDirectory())
-        ?.listSync()
-        .where((element) => element.path.endsWith('.apk'))
-        .toList();
-    if (apks != null && apks.isNotEmpty) {
-      for (var apk in apks) {
-        var shouldDelete = true;
-        var temp = apk.path.split('/').last;
-        temp = temp.substring(0, temp.length - 4);
-        var fn = temp.split('-');
-        if (fn.length == 3) {
-          var possibleId = fn[0];
-          var possibleVersion = fn[1];
-          var possibleApkUrlIndex = fn[2];
-          if (apps[possibleId] != null) {
-            if (apps[possibleId] != null &&
-                apps[possibleId]?.app != null &&
-                apps[possibleId]!.app.installedVersion !=
-                    apps[possibleId]!.app.latestVersion &&
-                apps[possibleId]!.app.latestVersion == possibleVersion &&
-                apps[possibleId]!.app.preferredApkIndex.toString() ==
-                    possibleApkUrlIndex) {
-              shouldDelete = false;
-            }
-          }
-        }
-
-        if (shouldDelete) apk.delete();
-      }
-    }
-  }
-
   Future<AppInfo?> getInstalledInfo(String? packageName) async {
     if (packageName != null) {
       try {
@@ -409,24 +360,37 @@ class AppsProvider with ChangeNotifier {
     return null;
   }
 
-  String standardizeVersionString(String versionString) {
-    return versionString.characters
-        .where((p0) => ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.']
-            .contains(p0))
-        .join('');
-  }
-
-  // If the App says it is installed by installedInfo is null, set it to not installed
+  // If the App says it is installed but installedInfo is null, set it to not installed
   // If the App says is is not installed but installedInfo exists, try to set it to installed as latest version...
   // ...if the latestVersion seems to match the version in installedInfo (not guaranteed)
-  App? correctInstallStatus(App app, AppInfo? installedInfo) {
+  // If that fails, just set it to the actual version string (all we can do at that point)
+  // Don't save changes, just return the object if changes were made (else null)
+  // If in a background isolate, return null straight away as the required plugin won't work anyways
+  App? getCorrectedInstallStatusAppIfPossible(App app, AppInfo? installedInfo) {
+    if (forBGTask) {
+      return null; // Can't correct in the background isolate
+    }
     var modded = false;
     if (installedInfo == null && app.installedVersion != null) {
       app.installedVersion = null;
       modded = true;
     }
     if (installedInfo != null && app.installedVersion == null) {
-      if (standardizeVersionString(app.latestVersion) ==
+      if (app.latestVersion.characters
+              .where((p0) => [
+                    '0',
+                    '1',
+                    '2',
+                    '3',
+                    '4',
+                    '5',
+                    '6',
+                    '7',
+                    '8',
+                    '9',
+                    '.'
+                  ].contains(p0))
+              .join('') ==
           installedInfo.versionName) {
         app.installedVersion = app.latestVersion;
       } else {
@@ -437,7 +401,7 @@ class AppsProvider with ChangeNotifier {
     return modded ? app : null;
   }
 
-  Future<void> loadApps({shouldCorrectInstallStatus = true}) async {
+  Future<void> loadApps() async {
     while (loadingApps) {
       await Future.delayed(const Duration(microseconds: 1));
     }
@@ -468,28 +432,26 @@ class AppsProvider with ChangeNotifier {
     }
     loadingApps = false;
     notifyListeners();
-    // For any that are not installed (by ID == package name), set to not installed if needed
-    if (shouldCorrectInstallStatus) {
-      List<App> modifiedApps = [];
-      for (var app in apps.values) {
-        var moddedApp = correctInstallStatus(app.app, app.installedInfo);
-        if (moddedApp != null) {
-          modifiedApps.add(moddedApp);
-        }
-      }
-      if (modifiedApps.isNotEmpty) {
-        await saveApps(modifiedApps, shouldCorrectInstallStatus: false);
+    List<App> modifiedApps = [];
+    for (var app in apps.values) {
+      var moddedApp =
+          getCorrectedInstallStatusAppIfPossible(app.app, app.installedInfo);
+      if (moddedApp != null) {
+        modifiedApps.add(moddedApp);
       }
     }
+    if (modifiedApps.isNotEmpty) {
+      await saveApps(modifiedApps);
+    }
   }
 
   Future<void> saveApps(List<App> apps,
-      {bool shouldCorrectInstallStatus = true}) async {
+      {bool attemptToCorrectInstallStatus = true}) async {
     for (var app in apps) {
       AppInfo? info = await getInstalledInfo(app.id);
       app.name = info?.name ?? app.name;
-      if (shouldCorrectInstallStatus) {
-        app = correctInstallStatus(app, info) ?? app;
+      if (attemptToCorrectInstallStatus) {
+        app = getCorrectedInstallStatusAppIfPossible(app, info) ?? app;
       }
       File('${(await getAppsDir()).path}/${app.id}.json')
           .writeAsStringSync(jsonEncode(app.toJson()));
@@ -515,15 +477,7 @@ class AppsProvider with ChangeNotifier {
     }
   }
 
-  bool checkAppObjectForUpdate(App app) {
-    if (!apps.containsKey(app.id)) {
-      throw 'App not found';
-    }
-    return app.latestVersion != apps[app.id]?.app.installedVersion;
-  }
-
-  Future<App?> getUpdate(String appId,
-      {bool shouldCorrectInstallStatus = true}) async {
+  Future<App?> checkUpdate(String appId) async {
     App? currentApp = apps[appId]!.app;
     SourceProvider sourceProvider = SourceProvider();
     App newApp = await sourceProvider.getApp(
@@ -536,51 +490,39 @@ class AppsProvider with ChangeNotifier {
     if (currentApp.preferredApkIndex < newApp.apkUrls.length) {
       newApp.preferredApkIndex = currentApp.preferredApkIndex;
     }
-    await saveApps([newApp],
-        shouldCorrectInstallStatus: shouldCorrectInstallStatus);
+    await saveApps([newApp]);
     return newApp.latestVersion != currentApp.latestVersion ? newApp : null;
   }
 
   Future<List<App>> checkUpdates(
-      {DateTime? ignoreAfter,
-      bool immediatelyThrowRateLimitError = false,
-      bool shouldCorrectInstallStatus = true,
-      bool immediatelyThrowSocketError = false}) async {
+      {DateTime? ignoreAppsCheckedAfter,
+      bool throwErrorsForRetry = false}) async {
     List<App> updates = [];
-    Map<String, List<String>> errors = {};
+    MultiAppMultiError errors = MultiAppMultiError();
     if (!gettingUpdates) {
       gettingUpdates = true;
-
       try {
-        List<String> appIds = apps.keys.toList();
-        if (ignoreAfter != null) {
-          appIds = appIds
-              .where((id) =>
-                  apps[id]!.app.lastUpdateCheck == null ||
-                  apps[id]!.app.lastUpdateCheck!.isBefore(ignoreAfter))
-              .toList();
-        }
+        List<String> appIds = apps.values
+            .where((app) =>
+                app.app.lastUpdateCheck == null ||
+                ignoreAppsCheckedAfter == null ||
+                app.app.lastUpdateCheck!.isBefore(ignoreAppsCheckedAfter))
+            .map((e) => e.app.id)
+            .toList();
         appIds.sort((a, b) => (apps[a]!.app.lastUpdateCheck ??
                 DateTime.fromMicrosecondsSinceEpoch(0))
             .compareTo(apps[b]!.app.lastUpdateCheck ??
                 DateTime.fromMicrosecondsSinceEpoch(0)));
-
         for (int i = 0; i < appIds.length; i++) {
           App? newApp;
           try {
-            newApp = await getUpdate(appIds[i],
-                shouldCorrectInstallStatus: shouldCorrectInstallStatus);
+            newApp = await checkUpdate(appIds[i]);
           } catch (e) {
-            if (e is RateLimitError && immediatelyThrowRateLimitError) {
+            if ((e is RateLimitError || e is SocketException) &&
+                throwErrorsForRetry) {
               rethrow;
             }
-            if (e is SocketException && immediatelyThrowSocketError) {
-              rethrow;
-            }
-            var tempIds = errors.remove(e.toString());
-            tempIds ??= [];
-            tempIds.add(appIds[i]);
-            errors.putIfAbsent(e.toString(), () => tempIds!);
+            errors.add(appIds[i], e.toString());
           }
           if (newApp != null) {
             updates.add(newApp);
@@ -590,18 +532,13 @@ class AppsProvider with ChangeNotifier {
         gettingUpdates = false;
       }
     }
-    if (errors.isNotEmpty) {
-      String finalError = '';
-      for (var e in errors.keys) {
-        finalError +=
-            '$e ${errors[e]!.map((e) => apps[e]!.app.name).toString()}. ';
-      }
-      throw finalError;
+    if (errors.content.isNotEmpty) {
+      throw errors;
     }
     return updates;
   }
 
-  List<String> getExistingUpdates(
+  List<String> findExistingUpdates(
       {bool installedOnly = false, bool nonInstalledOnly = false}) {
     List<String> updateAppIds = [];
     List<String> appIds = apps.keys.toList();
@@ -635,7 +572,6 @@ class AppsProvider with ChangeNotifier {
   }
 
   Future<int> importApps(String appsJSON) async {
-    // File picker does not work in android 13, so the user must paste the JSON directly into Obtainium to import Apps
     List<App> importedApps = (jsonDecode(appsJSON) as List<dynamic>)
         .map((e) => App.fromJson(e))
         .toList();
@@ -660,10 +596,11 @@ class AppsProvider with ChangeNotifier {
 }
 
 class APKPicker extends StatefulWidget {
-  const APKPicker({super.key, required this.app, this.initVal});
+  const APKPicker({super.key, required this.app, this.initVal, this.archs});
 
   final App app;
   final String? initVal;
+  final List<String>? archs;
 
   @override
   State<APKPicker> createState() => _APKPickerState();
@@ -681,18 +618,29 @@ class _APKPickerState extends State<APKPicker> {
       content: Column(children: [
         Text('${widget.app.name} has more than one package:'),
         const SizedBox(height: 16),
-        ...widget.app.apkUrls.map((u) => RadioListTile<String>(
-            title: Text(Uri.parse(u)
-                .pathSegments
-                .where((element) => element.isNotEmpty)
-                .last),
-            value: u,
-            groupValue: apkUrl,
-            onChanged: (String? val) {
-              setState(() {
-                apkUrl = val;
-              });
-            }))
+        ...widget.app.apkUrls.map(
+          (u) => RadioListTile<String>(
+              title: Text(Uri.parse(u)
+                  .pathSegments
+                  .where((element) => element.isNotEmpty)
+                  .last),
+              value: u,
+              groupValue: apkUrl,
+              onChanged: (String? val) {
+                setState(() {
+                  apkUrl = val;
+                });
+              }),
+        ),
+        if (widget.archs != null)
+          const SizedBox(
+            height: 16,
+          ),
+        if (widget.archs != null)
+          Text(
+            'Note:\nYour device supports the ${widget.archs!.length == 1 ? '\'${widget.archs![0]}\' CPU architecture.' : 'following CPU architectures: ${list2FriendlyString(widget.archs!.map((e) => '\'$e\'').toList())}.'}',
+            style: const TextStyle(fontStyle: FontStyle.italic, fontSize: 12),
+          ),
       ]),
       actions: [
         TextButton(

lib/providers/notifications_provider.dart

@@ -27,9 +27,11 @@ class UpdateNotification extends ObtainiumNotification {
             'Updates Available',
             'Notifies the user that updates are available for one or more Apps tracked by Obtainium',
             Importance.max) {
-    message = updates.length == 1
-        ? '${updates[0].name} has an update.'
-        : '${(updates.length == 2 ? '${updates[0].name} and ${updates[1].name}' : '${updates[0].name} and ${updates.length - 1} more apps')} have updates.';
+    message = updates.isEmpty
+        ? "No new updates."
+        : updates.length == 1
+            ? '${updates[0].name} has an update.'
+            : '${(updates.length == 2 ? '${updates[0].name} and ${updates[1].name}' : '${updates[0].name} and ${updates.length - 1} more apps')} have updates.';
   }
 }
 

lib/providers/settings_provider.dart

@@ -55,7 +55,7 @@ class SettingsProvider with ChangeNotifier {
   }
 
   int get updateInterval {
-    var min = prefs?.getInt('updateInterval') ?? 60;
+    var min = prefs?.getInt('updateInterval') ?? 360;
     if (!updateIntervals.contains(min)) {
       var temp = updateIntervals[0];
       for (var i in updateIntervals) {

lib/providers/source_provider.dart

@@ -12,6 +12,7 @@ import 'package:obtainium/app_sources/mullvad.dart';
 import 'package:obtainium/app_sources/signal.dart';
 import 'package:obtainium/app_sources/sourceforge.dart';
 import 'package:obtainium/components/generated_form.dart';
+import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/mass_app_sources/githubstars.dart';
 
 class AppNames {
@@ -90,12 +91,7 @@ class App {
       };
 }
 
-escapeRegEx(String s) {
-  return s.replaceAllMapped(RegExp(r'[.*+?^${}()|[\]\\]'), (x) {
-    return '\\${x[0]}';
-  });
-}
-
+// Ensure the input is starts with HTTPS and has no WWW
 preStandardizeUrl(String url) {
   if (url.toLowerCase().indexOf('http://') != 0 &&
       url.toLowerCase().indexOf('https://') != 0) {
@@ -145,7 +141,7 @@ abstract class AppSource {
   Future<String> apkUrlPrefetchModifier(String apkUrl);
 }
 
-abstract class MassAppSource {
+abstract class MassAppUrlSource {
   late String name;
   late List<String> requiredArgs;
   Future<List<String>> getUrls(List<String> args);
@@ -160,12 +156,11 @@ class SourceProvider {
     IzzyOnDroid(),
     Mullvad(),
     Signal(),
-    SourceForge(),
-    // APKMirror()
+    SourceForge()
   ];
 
-  // Add more mass source classes here so they are available via the service
-  List<MassAppSource> massSources = [GitHubStars()];
+  // Add more mass url source classes here so they are available via the service
+  List<MassAppUrlSource> massUrlSources = [GitHubStars()];
 
   AppSource getSource(String url) {
     url = preStandardizeUrl(url);
@@ -177,12 +172,12 @@ class SourceProvider {
       }
     }
     if (source == null) {
-      throw 'URL does not match a known source';
+      throw UnsupportedURLError();
     }
     return source;
   }
 
-  bool doesSourceHaveRequiredAdditionalData(AppSource source) {
+  bool ifSourceAppsRequireAdditionalData(AppSource source) {
     for (var row in source.additionalDataFormItems) {
       for (var element in row) {
         if (element.required) {
@@ -217,8 +212,7 @@ class SourceProvider {
         DateTime.now());
   }
 
-  /// Returns a length 2 list, where the first element is a list of Apps and
-  /// the second is a Map<String, dynamic> of URLs and errors
+  // Returns errors in [results, errors] instead of throwing them
   Future<List<dynamic>> getApps(List<String> urls,
       {List<String> ignoreUrls = const []}) async {
     List<App> apps = [];

pubspec.lock

@@ -1,6 +1,13 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  android_alarm_manager_plus:
+    dependency: "direct main"
+    description:
+      name: android_alarm_manager_plus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   animations:
     dependency: "direct main"
     description:
@@ -358,7 +365,7 @@ packages:
       name: path_provider_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.20"
+    version: "2.0.21"
   path_provider_ios:
     dependency: transitive
     description:
@@ -470,7 +477,7 @@ packages:
       name: share_plus
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.0"
+    version: "6.2.0"
   share_plus_platform_interface:
     dependency: transitive
     description:
@@ -700,13 +707,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
-  workmanager:
-    dependency: "direct main"
-    description:
-      name: workmanager
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.5.1"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -17,7 +17,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 0.6.6+50 # When changing this, update the tag in main() accordingly
+version: 0.6.10+54 # When changing this, update the tag in main() accordingly
 
 environment:
   sdk: '>=2.18.2 <3.0.0'
@@ -42,7 +42,6 @@ dependencies:
   provider: ^6.0.3
   http: ^0.13.5
   webview_flutter: ^3.0.4
-  workmanager: ^0.5.0
   dynamic_color: ^1.5.4
   html: ^0.15.0
   shared_preferences: ^2.0.15
@@ -56,6 +55,7 @@ dependencies:
   share_plus: ^6.0.1
   installed_apps: ^1.3.1
   package_archive_info: ^0.1.0
+  android_alarm_manager_plus: ^2.1.0
 
 
 dev_dependencies: