Add target ServiceUpdateMigrator

Author: intitni

Core/Package.resolved

@@ -203,3 +203,4 @@ let package = Package(
     ]
 )
 
+ 

Core/Package.swift

@@ -0,0 +1,30 @@
+import Foundation
+import Preferences
+
+extension UserDefaultPreferenceKeys {
+    struct OldMigrationVersion: UserDefaultPreferenceKey {
+        typealias PreferenceValueType = String
+        static let key = "OldMigrationVersion"
+    }
+    
+    var oldMigrationVersion: OldMigrationVersion { .init() }
+}
+
+struct ServiceUpdateMigrator {
+    func migrate() {
+        migrate(
+            from: UserDefaults.shared.value(for: \.oldMigrationVersion),
+            to: Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion")
+        )
+    }
+    
+    func migrate(from oldVersion: String, to currentVersion: String) {
+        guard let old = Int(oldVersion), let new = Int(currentVersion) else { return }
+        guard old != new else { return }
+        if old <= 135 {
+            migrateFromLowerThanOrEqualToVersion135()
+        }
+    }
+}
+
+func migrateFromLowerThanOrEqualToVersion135() {}