Add SettingsStore

Sources/Secretive/Helpers/SettingsHelper.swift

@@ -0,0 +1,60 @@
+//
+//  SettingsHelper.swift
+//  Secretive
+//
+//  Created by Paul Heidekrüger on 27.02.24.
+//  Copyright © 2024 Max Goedjen. All rights reserved.
+//
+
+import Foundation
+
+class SettingsStore {
+    static let service = "com.maxgoedjen.Secretive"
+}
+
+extension SettingsStore {
+    static func set(key: String, value: String) -> Bool {
+        let valueData = value.data(using: String.Encoding.utf8)!
+        
+        if let keyVal = get(key: key) {
+            if keyVal == value {
+                return true
+            }
+            
+            let updateQuery: [String: Any] = [kSecClass as String: kSecClassGenericPassword,
+                                              kSecAttrServer as String: service]
+            let attributes: [String: Any] = [kSecAttrAccount as String: key,
+                                             kSecValueData as String: valueData]
+            // FIXME: Make this non-blocking as described here: https://developer.apple.com/documentation/security/1393617-secitemupdate
+            let status = SecItemUpdate(updateQuery as CFDictionary, attributes as CFDictionary)
+            guard status == errSecSuccess else {
+                print("Couldn't update item in keychain. " + status.description)
+                return false
+            }
+        } else {
+            let addquery: [String: Any] = [kSecClass as String: kSecClassGenericPassword,
+                                           kSecAttrAccount as String: key,
+                                           kSecAttrServer as String: service,
+                                           kSecValueData as String: valueData]
+            // FIXME: Make this non-blocking as described here: https://developer.apple.com/documentation/security/1401659-secitemadd 
+            let status = SecItemAdd(addquery as CFDictionary, nil)
+            guard status == errSecSuccess else {
+                print("Couldn't add item to keychain. " + status.description)
+                return false
+            }
+        }
+        return true
+    }
+
+    static func get(key: String) -> String? {
+        let getquery: [String: Any] = [kSecClass as String: kSecClassGenericPassword,
+                                       kSecAttrAccount as String: key,
+                                       kSecAttrServer as String: service,
+                                       kSecMatchLimit as String: kSecMatchLimitOne,
+                                       kSecReturnData as String: true]
+        var item: CFTypeRef?
+        let status = SecItemCopyMatching(getquery as CFDictionary, &item)
+        
+        return status == errSecSuccess ? String(decoding: item as! Data, as: UTF8.self) : nil 
+    }
+}