How to handle Void success case with Result lib (success/failure)

Question

Introduction:

I\'m introducing a Result framework (antitypical) in some points of my app. In example, given this function:

func find         


        

Answer 1

I found Rob's answer really interesting and smart. I just want to contribute with a possible working solution to help others:

enum VoidResult {
    case success
    case failure(Error)
}

/// Performs a request that expects no data back but its success depends on the result code
/// - Parameters:
///   - urlRequest: Url request with the request config
///   - httpMethodType: HTTP method to be used: GET, POST ...
///   - params: Parameters to be included with the request
///   - headers: Headers to be included with the request
///   - completion: Callback trigered upon completion
func makeRequest(url: URL,
                 httpMethodType: HTTPMethodType,
                 params: [String:Any],
                 headers: [String:String],
                 completion: @escaping (VoidResult) -> Void){
    let alamofireHTTPMethod = httpMethodType.toAlamofireHTTPMethod()
    
    let parameterEncoder: ParameterEncoding
    switch alamofireHTTPMethod {
    case .get:
        parameterEncoder = URLEncoding.default
    case .post:
        parameterEncoder = JSONEncoding.default
    default:
        parameterEncoder = URLEncoding.default
    }
    
    Log.d(message: "Calling: \(url.absoluteString)")
    AF.request(url,
               method: alamofireHTTPMethod,
               parameters: params,
               encoding:parameterEncoder,
               headers: HTTPHeaders(headers)).response { response in
                guard let statusCode = response.response?.statusCode,
                    (200 ..< 300) ~= statusCode else {
                        completion(.failure(NetworkFetcherError.networkError))
                        return
                }
                completion(.success)
                
    }
    
  }