Add native SwiftUI player and macOS CI

MusicBridge/KeychainStore.swift

@@ -0,0 +1,41 @@
+import Foundation
+import Security
+
+enum KeychainStore {
+    private static var query: [String: Any] {
+        [kSecClass as String: kSecClassGenericPassword,
+         kSecAttrService as String: "MusicBridge.connection.v1", kSecAttrAccount as String: "primaryPC"]
+    }
+
+    static func load() throws -> Connection? {
+        var q = query
+        q[kSecReturnData as String] = true
+        q[kSecMatchLimit as String] = kSecMatchLimitOne
+        var item: CFTypeRef?
+        let status = SecItemCopyMatching(q as CFDictionary, &item)
+        if status == errSecItemNotFound { return nil }
+        guard status == errSecSuccess, let data = item as? Data else { throw failure(status) }
+        let saved = try JSONDecoder().decode(Connection.self, from: data)
+        guard let token = saved.token, Connection.isFingerprint(token) else { throw BridgeError.message("Повреждена запись сопряжения.") }
+        return try Connection(endpoint: saved.endpoint.absoluteString, fingerprint: saved.fingerprint, token: token)
+    }
+
+    static func save(_ connection: Connection) throws {
+        let values: [String: Any] = [kSecValueData as String: try JSONEncoder().encode(connection),
+                                   kSecAttrAccessible as String: kSecAttrAccessibleWhenUnlockedThisDeviceOnly]
+        var status = SecItemUpdate(query as CFDictionary, values as CFDictionary)
+        if status == errSecItemNotFound {
+            status = SecItemAdd(query.merging(values) { _, new in new } as CFDictionary, nil)
+        }
+        guard status == errSecSuccess else { throw failure(status) }
+    }
+
+    static func delete() throws {
+        let status = SecItemDelete(query as CFDictionary)
+        guard status == errSecSuccess || status == errSecItemNotFound else { throw failure(status) }
+    }
+
+    private static func failure(_ status: OSStatus) -> BridgeError {
+        .message("Не удалось прочитать или сохранить сопряжение в Keychain (\(status)).")
+    }
+}