From 9960124d3219e2ab72e14443a1a79a1bac6b2cd3 Mon Sep 17 00:00:00 2001
From: Jagandeep Brar <me@jagandeepbrar.io>
Date: Mon, 29 Aug 2022 14:49:50 -0400
Subject: [PATCH] fix(database): prevent deadlock in database deletion actions

---
 lib/database/database.dart                    | 31 ++++++++++++++-----
 lib/system/filesystem/filesystem.dart         |  1 +
 .../filesystem/platform/filesystem_io.dart    | 18 +++++++++--
 3 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/lib/database/database.dart b/lib/database/database.dart
index 0d90beaa..b5ba6fe9 100644
--- a/lib/database/database.dart
+++ b/lib/database/database.dart
@@ -3,6 +3,8 @@ import 'package:lunasea/database/models/profile.dart';
 import 'package:lunasea/database/table.dart';
 import 'package:lunasea/database/tables/bios.dart';
 import 'package:lunasea/database/tables/lunasea.dart';
+import 'package:lunasea/system/filesystem/filesystem.dart';
+import 'package:lunasea/system/logger.dart';
 import 'package:lunasea/system/platform.dart';
 import 'package:lunasea/vendor.dart';
 
@@ -10,13 +12,13 @@ class LunaDatabase {
   static const String _DATABASE_LEGACY_PATH = 'database';
   static const String _DATABASE_PATH = 'LunaSea/database';
 
-  String get _path {
+  String get path {
     if (LunaPlatform.isWindows || LunaPlatform.isLinux) return _DATABASE_PATH;
     return _DATABASE_LEGACY_PATH;
   }
 
   Future<void> initialize() async {
-    await Hive.initFlutter(_path);
+    await Hive.initFlutter(path);
     LunaTable.register();
     await open();
   }
@@ -25,13 +27,28 @@ class LunaDatabase {
     try {
       await LunaBox.open();
       if (LunaBox.profiles.isEmpty) await bootstrap();
-    } catch (error) {
-      for (final box in LunaBox.values) {
-        await Hive.deleteBoxFromDisk(box.key);
-      }
-
+    } catch (error, stack) {
+      await nuke();
       await LunaBox.open();
       await bootstrap(databaseCorruption: true);
+
+      LunaLogger().error(
+        'Database corruption detected',
+        error,
+        stack,
+      );
+    }
+  }
+
+  Future<void> nuke() async {
+    await Hive.close();
+
+    for (final box in LunaBox.values) {
+      await Hive.deleteBoxFromDisk(box.key, path: path);
+    }
+
+    if (LunaFileSystem.isSupported) {
+      await LunaFileSystem().nuke();
     }
   }
 
diff --git a/lib/system/filesystem/filesystem.dart b/lib/system/filesystem/filesystem.dart
index 654de64f..011f7c1c 100644
--- a/lib/system/filesystem/filesystem.dart
+++ b/lib/system/filesystem/filesystem.dart
@@ -17,4 +17,5 @@ abstract class LunaFileSystem {
 
   Future<bool> save(BuildContext context, String name, List<int> data);
   Future<LunaFile?> read(BuildContext context, List<String> extensions);
+  Future<void> nuke();
 }
diff --git a/lib/system/filesystem/platform/filesystem_io.dart b/lib/system/filesystem/platform/filesystem_io.dart
index b3194c10..f27467d1 100644
--- a/lib/system/filesystem/platform/filesystem_io.dart
+++ b/lib/system/filesystem/platform/filesystem_io.dart
@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
+import 'package:lunasea/database/database.dart';
 import 'package:lunasea/vendor.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:share_plus/share_plus.dart';
@@ -21,7 +22,20 @@ LunaFileSystem getFileSystem() {
   throw UnsupportedError('LunaFileSystem unsupported');
 }
 
-class _Desktop implements LunaFileSystem {
+abstract class _Shared implements LunaFileSystem {
+  @override
+  Future<void> nuke() async {
+    final subpath = LunaDatabase().path;
+    final appDocDir = await getApplicationDocumentsDirectory();
+    final database = Directory('${appDocDir.path}/$subpath');
+
+    if (database.existsSync()) {
+      database.deleteSync(recursive: true);
+    }
+  }
+}
+
+class _Desktop extends _Shared {
   @override
   Future<bool> save(BuildContext context, String name, List<int> data) async {
     try {
@@ -69,7 +83,7 @@ class _Desktop implements LunaFileSystem {
   }
 }
 
-class _Mobile implements LunaFileSystem {
+class _Mobile extends _Shared {
   @override
   Future<bool> save(BuildContext context, String name, List<int> data) async {
     try {