fix: improve app list loading speed (ReVanced#1166)

lib/services/patcher_api.dart

@@ -25,6 +25,8 @@ class PatcherAPI {
  late Directory _tmpDir;
  late File _keyStoreFile;
  List<Patch> _patches = [];
+ List<Patch> _universalPatches = [];
+ List<String> _compatiblePackages = [];
  Map filteredPatches = <String, List<Patch>>{};
  File? _outFile;
 
@@ -45,6 +47,24 @@ class PatcherAPI {
  }
  }
 
+ List<String> getCompatiblePackages() {
+ final List<String> compatiblePackages = [];
+ for (final Patch patch in _patches) {
+ for (final Package package in patch.compatiblePackages) {
+ if (!compatiblePackages.contains(package.name)) {
+ compatiblePackages.add(package.name);
+ }
+ }
+ }
+ return compatiblePackages;
+ }
+
+ List<Patch> getUniversalPatches() {
+ return _patches
+ .where((patch) => patch.compatiblePackages.isEmpty)
+ .toList();
+ }
+
  Future<void> _loadPatches() async {
  try {
  if (_patches.isEmpty) {
@@ -56,55 +76,53 @@ class PatcherAPI {
  }
  _patches = List.empty();
  }
+
+ _compatiblePackages = getCompatiblePackages();
+ _universalPatches = getUniversalPatches();
  }
 
  Future<List<ApplicationWithIcon>> getFilteredInstalledApps(
  bool showUniversalPatches,
  ) async {
  final List<ApplicationWithIcon> filteredApps = [];
  final bool allAppsIncluded =
- _patches.any((patch) => patch.compatiblePackages.isEmpty) &&
+ _universalPatches.isNotEmpty &&
  showUniversalPatches;
  if (allAppsIncluded) {
- final allPackages = await DeviceApps.getInstalledApplications(
+ final appList = await DeviceApps.getInstalledApplications(
  includeAppIcons: true,
  onlyAppsWithLaunchIntent: true,
  );
- for (final pkg in allPackages) {
- if (!filteredApps.any((app) => app.packageName == pkg.packageName)) {
- final appInfo = await DeviceApps.getApp(
- pkg.packageName,
+
+ for(final app in appList) {
+ filteredApps.add(app as ApplicationWithIcon);
+ }
+ }
+ for (final packageName in _compatiblePackages) {
+ try {
+ if (!filteredApps.any((app) => app.packageName == packageName)) {
+ final ApplicationWithIcon? app = await DeviceApps.getApp(
+ packageName,
  true,
  ) as ApplicationWithIcon?;
- if (appInfo != null) {
- filteredApps.add(appInfo);
+ if (app != null) {
+ filteredApps.add(app);
  }
  }
- }
- }
- for (final Patch patch in _patches) {
- for (final Package package in patch.compatiblePackages) {
- try {
- if (!filteredApps.any((app) => app.packageName == package.name)) {
- final ApplicationWithIcon? app = await DeviceApps.getApp(
- package.name,
- true,
- ) as ApplicationWithIcon?;
- if (app != null) {
- filteredApps.add(app);
- }
- }
- } on Exception catch (e) {
- if (kDebugMode) {
- print(e);
- }
+ } on Exception catch (e) {
+ if (kDebugMode) {
+ print(e);
  }
  }
  }
  return filteredApps;
  }
 
  List<Patch> getFilteredPatches(String packageName) {
+ if (!_compatiblePackages.contains(packageName)) {
+ return _universalPatches;
+ }
+
  final List<Patch> patches = _patches
  .where(
  (patch) =>