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Network Controller
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| fileprivate enum ServiceType:String { | |
| case GET,POST,PUT,DELETE | |
| } | |
| struct APIController:NetworkProtocol { | |
| func verifyUserLogin(_ req: Loginrequest, completion: @escaping (LoginResponse?, NetworkError?) -> Void) { | |
| networkRequestResult(urlString: Constants.API_NEW_PATIENT, type: .POST, header: nil, encodingData: req, completion: completion) | |
| } | |
| } | |
| extension APIController { | |
| private func networkRequestResult<T:Decodable,Q: Encodable>(urlString: String,type:PIServiceType,header:[String:String]?,encodingData: Q,completion: @escaping (Result<T,NetworkingControllerError>) -> Void) { | |
| guard let url = URL(string: Constants.BASE_URL+urlString) else { | |
| DispatchQueue.main.async { completion(.failure(NetworkingControllerError.invalidRequest)) } | |
| return | |
| } | |
| var request = URLRequest(url: url) | |
| request.httpMethod = type.rawValue | |
| request.addValue("application/json", forHTTPHeaderField: "Accept") | |
| request.addValue("application/json", forHTTPHeaderField: "Content-Type") | |
| if type != .GET { | |
| do { | |
| let jsonBody = try JSONEncoder().encode(encodingData) | |
| request.httpBody = jsonBody | |
| } catch { | |
| DispatchQueue.main.async { completion(.failure(NetworkingControllerError.invalidRequest)) } | |
| return | |
| } | |
| } | |
| let task = URLSession.shared.dataTask(with: request) { (data,response, err) in | |
| if let e = err { | |
| print("Failed to fetch data:", e.localizedDescription, "Error Description\(e)") | |
| DispatchQueue.main.async { | |
| completion(.failure(NetworkingControllerError.forwardedError(Error: e)))} | |
| return | |
| } | |
| if let r = response { | |
| let httpresponse = (r as! HTTPURLResponse) | |
| print("statusCode \(httpresponse.statusCode)") | |
| if httpresponse.statusCode != 200 { | |
| DispatchQueue.main.async { | |
| completion(.failure(NetworkingControllerError.noDataError)) | |
| } | |
| return | |
| } | |
| } | |
| guard let data = data else { | |
| DispatchQueue.main.async { | |
| completion(.failure(NetworkingControllerError.noDataError))} | |
| return | |
| } | |
| do { | |
| let dataReceived = try JSONDecoder().decode(T.self, from: data) | |
| DispatchQueue.main.async { | |
| completion(.success(dataReceived)) | |
| } | |
| } catch let jsonErr { | |
| print("page parse failed error \(jsonErr)") | |
| DispatchQueue.main.async { | |
| completion(.failure(NetworkingControllerError.dataParseError(error: jsonErr))) | |
| } | |
| } | |
| } | |
| task.resume() | |
| } | |
| } |
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| enum NetworkingControllerError:Error { | |
| case Non200StatusCode | |
| case invalidRequest | |
| case NoInternetConnection | |
| case forwardedError(Error:Error) | |
| case noDataError | |
| case apiError(error:NetworkError?) | |
| case dataParseError(error:Error) | |
| case customError(title:String?,message:String) | |
| } |
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| class ViewController:UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| let loginRequest = Loginrequest(username: "bharath", password: "bharath") | |
| APIController().verifyUserLogin(loginRequest) { (response, error) in | |
| if let e = error { | |
| print("Login API Error \(e.localizedDescription)") | |
| switch e { | |
| case .APINotFoundError: break | |
| case .InputDataError: break | |
| case .Non200StatusCode: break | |
| default: | |
| break | |
| } | |
| } else { | |
| if let r = response { | |
| if r.status ?? false { | |
| print("login is success full") | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |
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