From 7571ceac23025dd24726b8bb86343526a5d097f4 Mon Sep 17 00:00:00 2001
From: Ravindra Barthwal <ravindra.barthwal@crypso.club>
Date: Wed, 21 Aug 2024 13:30:02 +0530
Subject: [PATCH] feat: Added method to delete expired cache in
 cache_manager.dart

- Added deleteExpiredCache() method
- Removed unused _instance field from the cache_manager.dart
---
 lib/src/cache_manager.dart | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/src/cache_manager.dart b/lib/src/cache_manager.dart
index b0becbe..c9cc4d7 100644
--- a/lib/src/cache_manager.dart
+++ b/lib/src/cache_manager.dart
@@ -10,7 +10,6 @@ typedef ExpirationCallback = void Function(String key);
 /// CacheManager class to handle caching operations with optional TTL (Time-To-Live).
 /// It also supports encryption, backup, and restore functionalities.
 class CacheManager {
-  static final CacheManager _instance = CacheManager._internal();
   static Database? _database;
   final encrypt.Encrypter _encrypter =
       encrypt.Encrypter(encrypt.AES(encrypt.Key.fromLength(32)));
@@ -130,6 +129,16 @@ class CacheManager {
     await db.delete('cache');
   }
 
+  /// Deletes all the expired cache entries based on ttl.
+  ///
+  /// Returns the number of entries deleted.
+  Future<int> deleteExpiredCache() async {
+    final db = await database;
+    return await db.delete('cache',
+        where: 'ttl != NULL && ttl < ?',
+        whereArgs: [DateTime.now().millisecondsSinceEpoch]);
+  }
+
   /// Backs up cache data to a specified file path.
   Future<void> backupCache(String backupPath) async {
     final db = await database;