harbour: Open cache database before starting app

packages/harbour/lib/main.dart

@@ -31,7 +31,9 @@ Future main() async {
 
   final sharedPreferences = await SharedPreferences.getInstance();
 
-  final requestManager = RequestManager(platform);
+  final cache = Cache(platform);
+  await cache.init();
+  final requestManager = RequestManager(cache);
 
   final globalOptions = GlobalOptions(
     Storage('global', sharedPreferences),

packages/harbour/lib/src/utils/request_manager.dart

@@ -1,10 +1,9 @@
 part of '../harbour.dart';
 
 class RequestManager {
-  RequestManager(final HarbourPlatform platform) {
+  RequestManager(this._cache);
-    _cache = Cache(platform);
+
-  }
+  final Cache _cache;
-  late final Cache _cache;
 
   final bool _enablePrinting = false;
 
@@ -182,7 +181,7 @@ class Cache {
   final HarbourPlatform _platform;
   Database? _database;
 
-  Future _ensureInitialized() async {
+  Future init() async {
     if (_database != null) {
       return;
     }
@@ -199,27 +198,17 @@ class Cache {
     );
   }
 
-  Future<bool> has(final String key) async {
+  Future<bool> has(final String key) async =>
-    await _ensureInitialized();
+      Sqflite.firstIntValue(await _database!.rawQuery('SELECT COUNT(*) FROM cache WHERE key = ?', [key])) == 1;
-
-    return Sqflite.firstIntValue(await _database!.rawQuery('SELECT COUNT(*) FROM cache WHERE key = ?', [key])) == 1;
-  }
-
-  Future<String?> get(final String key) async {
-    await _ensureInitialized();
-
-    return (await _database!.rawQuery('SELECT value FROM cache WHERE key = ?', [key]))[0]['value'] as String?;
-  }
 
-  Future set(final String key, final String value) async {
+  Future<String?> get(final String key) async =>
-    await _ensureInitialized();
+      (await _database!.rawQuery('SELECT value FROM cache WHERE key = ?', [key]))[0]['value'] as String?;
 
-    await _database!.rawQuery(
+  Future set(final String key, final String value) async => _database!.rawQuery(
         'INSERT INTO cache (key, value) VALUES (?, ?) ON CONFLICT(key) DO UPDATE SET value = excluded.value',
         [key, value],
       );
 }
-}
 
 class ResultCached<T> implements Result<T> {
   ResultCached(