Enum with raw values working with Codable

EnumCodable.swift

enum SongLanguage: Int {
    case vietnamese = 0
    case english = 1
    case thai = 2
    case unknown = -1
}

extension SongLanguage: Codable {
    func encode(to encoder: Encoder) throws {
        var container = encoder.unkeyedContainer()
        try container.encode(self.rawValue)
    }
    
    public init(from decoder: Decoder) throws {
        var container = try decoder.unkeyedContainer()
        if let rawInt = try container.decodeIfPresent(Int.self) {
            self = SongLanguage(rawValue: rawInt) ?? .unknown
        } else {
            self = .unknown
        }
    }
}