Commit 7ff91d8

@@ -25,7 +25,10 @@ import 'package:sqflite/sqflite.dart';
 /// that should be available everywhere in the app.
 class App extends StatefulWidget {
   /// Create the base for the entire app.
-  const App();
+  const App({this.forceClearAppDataOnLaunch = false});
+
+  /// Permanently deletes all files the app uses during state initialization.
+  final bool forceClearAppDataOnLaunch;
 
   @override
   State<App> createState() => _AppState();
@@ -36,6 +39,11 @@ class _AppState extends State<App> {
   ConfigDB? _configDB;
   BloodPressureModel? _bloodPressureModel;
 
+  /// The result of the first [_loadApp] call.
+  ///
+  /// Storing this is necessary to ensure the app is not loaded multiple times.
+  Widget? _loadedChild;
+
   @override
   void dispose() {
     _configDB?.database.close();
@@ -47,7 +55,27 @@ class _AppState extends State<App> {
 
   /// Load the primary app data asynchronously to allow load animations.
   Future<Widget> _loadApp() async {
+    if (_loadedChild != null) return _loadedChild!;
+
     WidgetsFlutterBinding.ensureInitialized();
+
+    if (widget.forceClearAppDataOnLaunch) {
+      try {
+        final dbPath = await getDatabasesPath();
+        File(join(await getDatabasesPath(), 'blood_pressure.db')).deleteSync();
+        File(join(await getDatabasesPath(), 'blood_pressure.db-journal')).deleteSync();
+      } on FileSystemException {
+        // File is likely already deleted or couldn't be created in the first place.
+      }
+      try {
+        File(join(await getDatabasesPath(), 'config.db')).deleteSync();
+        File(join(await getDatabasesPath(), 'config.db-journal')).deleteSync();
+      } on FileSystemException { }
+      try {
+        File(join(await getDatabasesPath(), 'medicine.intakes')).deleteSync();
+      } on FileSystemException { }
+    }
+
     // 2 different db files
     _bloodPressureModel = await BloodPressureModel.create();
     _configDB = await ConfigDB.open();
@@ -103,7 +131,7 @@ class _AppState extends State<App> {
     // Reset the step size intervall to current on startup
     intervalStorageManager.mainPage.setToMostRecentIntervall();
 
-    return MultiProvider(providers: [
+    _loadedChild = MultiProvider(providers: [
       ChangeNotifierProvider(create: (context) => _bloodPressureModel!),
       ChangeNotifierProvider(create: (context) => settings),
       ChangeNotifierProvider(create: (context) => exportSettings),
@@ -113,6 +141,8 @@ class _AppState extends State<App> {
       ChangeNotifierProvider(create: (context) => exportColumnsManager),
       ChangeNotifierProvider(create: (context) => intakeHistory),
     ], child: _buildAppRoot(),);
+
+    return _loadedChild!;
   }
 
   @override

@@ -1,33 +1,5 @@
 import 'package:blood_pressure_app/app.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
-/// Start the app and load databases.
-///
-/// In debug mode `FORCE_CLEAR_ALL_APP_DATA` as the first argument deletes
-/// database files before app start.
-void main([List<String>? args]) async {
-  if (kDebugMode && args?.firstOrNull == 'FORCE_CLEAR_ALL_APP_DATA') {
-    await _forceClearAppData();
-  }
-  runApp(App());
-}
-
-/// Removes all files stored by the app without maintaining integrity.
-Future<void> _forceClearAppData() async {
-  /* TODO
-  try {
-    File(join(await getDatabasesPath(), 'blood_pressure.db')).deleteSync();
-    File(join(await getDatabasesPath(), 'blood_pressure.db-journal')).deleteSync();
-  } on FileSystemException {
-    // File is likely already deleted or couldn't be created in the first place.
-  }
-  try {
-    File(join(await getDatabasesPath(), 'config.db')).deleteSync();
-    File(join(await getDatabasesPath(), 'config.db-journal')).deleteSync();
-  } on FileSystemException { }
-  try {
-    File(join(await getDatabasesPath(), 'medicine.intakes')).deleteSync();
-  } on FileSystemException { }
-   */
-}
+/// Run the [App].
+void main() => runApp(App());