migration

PediFoods/Services/KeychainStore.swift

@@ -0,0 +1,60 @@
+import Foundation
+#if os(iOS)
+import Security
+#endif
+
+/// Small generic Keychain wrapper (iOS) with a UserDefaults fallback on other
+/// platforms (macOS test target), namespaced by `service`+`key`.
+enum KeychainStore {
+    static func save(_ value: String, service: String, key: String) {
+#if os(iOS)
+        guard let data = value.data(using: .utf8) else { return }
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key
+        ]
+        SecItemDelete(query as CFDictionary)
+        var attributes = query
+        attributes[kSecValueData as String] = data
+        SecItemAdd(attributes as CFDictionary, nil)
+#else
+        UserDefaults.standard.set(value, forKey: "\(service).\(key)")
+#endif
+    }
+
+    static func load(service: String, key: String) -> String? {
+#if os(iOS)
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key,
+            kSecReturnData as String: true,
+            kSecMatchLimit as String: kSecMatchLimitOne
+        ]
+        var result: AnyObject?
+        let status = SecItemCopyMatching(query as CFDictionary, &result)
+        guard status == errSecSuccess,
+              let data = result as? Data,
+              let value = String(data: data, encoding: .utf8) else {
+            return nil
+        }
+        return value
+#else
+        UserDefaults.standard.string(forKey: "\(service).\(key)")
+#endif
+    }
+
+    static func delete(service: String, key: String) {
+#if os(iOS)
+        let query: [String: Any] = [
+            kSecClass as String: kSecClassGenericPassword,
+            kSecAttrService as String: service,
+            kSecAttrAccount as String: key
+        ]
+        SecItemDelete(query as CFDictionary)
+#else
+        UserDefaults.standard.removeObject(forKey: "\(service).\(key)")
+#endif
+    }
+}