libsignal/swift/Sources/LibSignalClient/messages/CiphertextMessage.swift

//
// Copyright 2020-2021 Signal Messenger, LLC.
// SPDX-License-Identifier: AGPL-3.0-only
//

import SignalFfi

public class CiphertextMessage: NativeHandleOwner {
    public struct MessageType: RawRepresentable, Hashable {
        public var rawValue: UInt8
        public init(rawValue: UInt8) {
            self.rawValue = rawValue
        }

        internal init(_ knownType: SignalCiphertextMessageType) {
            self.init(rawValue: UInt8(knownType.rawValue))
        }

        public static var whisper: Self {
            return Self(SignalCiphertextMessageType_Whisper)
        }
        public static var preKey: Self {
            return Self(SignalCiphertextMessageType_PreKey)
        }
        public static var senderKey: Self {
            return Self(SignalCiphertextMessageType_SenderKey)
        }
        public static var plaintext: Self {
            return Self(SignalCiphertextMessageType_Plaintext)
        }
    }

    internal override class func destroyNativeHandle(_ handle: OpaquePointer) -> SignalFfiErrorRef? {
        return signal_ciphertext_message_destroy(handle)
    }

    public convenience init(_ plaintextContent: PlaintextContent) {
        var result: OpaquePointer?
        plaintextContent.withNativeHandle { plaintextContentHandle in
            failOnError(signal_ciphertext_message_from_plaintext_content(&result, plaintextContentHandle))
        }
        self.init(owned: result!)
    }

    public func serialize() -> [UInt8] {
        return withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningArray {
                    signal_ciphertext_message_serialize($0, $1, nativeHandle)
                }
            }
        }
    }

    public var messageType: MessageType {
        let rawValue = withNativeHandle { nativeHandle in
            failOnError {
                try invokeFnReturningInteger {
                    signal_ciphertext_message_type($0, nativeHandle)
                }
            }
        }
        return MessageType(rawValue: rawValue)
    }
}