HTTPError.swift

public enum HTTPError: Error, ExpressibleByIntegerLiteral {

    case badRequest(description: String?)
    case unauthorized(description: String?)
    case notFound(description: String?)
    case serverError(description: String?)
    case unprocessableRequest(description: String?)
    case unknown(description: String?)

}

// MARK: - ExpressibleByIntegerLiteral

public extension HTTPError {

    public init(integerLiteral value: Int) {
        self = .init(code: value, description: nil)
    }

}

// MARK: - Init

extension HTTPError {

    init(code: Int, description: String?) {
        switch code {
        case 400:
            self = .badRequest(description: description)
        case 401:
            self = .unauthorized(description: description)
        case 404:
            self = .notFound(description: description)
        case 422:
            self = .unprocessableRequest(description: description)
        case 500:
            self = .serverError(description: description)
        default:
            self = .unknown(description: description)
        }
    }

}