I not able to decode JSON data in swift - php

Question

I am trying to create simple login and signup in swift with php mysql in backend. I was following "https://github.com/EMacco/ios-tutorials/tree/yummie-network-connection/Yummie" this project
I get the following error
The response is: {"data":[{"response":"Success","username":"Mohammad Tariq Shamim"}]} Error Response could not be decoded
I am getting response from the server but JSON is not getting decoded. Following is my code
enum Route {
static let baseurl = "http://arabscholar.net/android/"
case login
var description: String {
switch self {
case .login: return "login.php"
}
}
}
struct User: Decodable{ let username: String? let response: String? }
struct ApiResponse<T: Decodable>: Decodable {
let status: Int
let data: T?
let error: String?
}
AppError Swift file
enum AppError: LocalizedError {
case errorDecoding
case unknownError
case invalidUrl
case serverError(String)
var errorDescription: String? {
switch self {
case .errorDecoding:
return "Response could not be decoded"
case .unknownError:
return "Unknown error"
case .invalidUrl:
return "Url invalid"
case .serverError(let error):
return error
}
}
}
Main networking struct file
struct NetworkService {
static let shared = NetworkService()
private init() {}
func signin(username: String, password: String, completion: #escaping(Result<User, Error>) -> Void) {
let params = ["login": "user", "email": username, "password": password]
request(route: .login, method: .post, parameters: params, completion: completion)
}
private func request<T: Decodable>(route: Route, method: Method, parameters: [String: Any]? = nil, completion: #escaping(Result<T, Error>) -> Void) {
guard let request = createRequest(route: route, method: method, parameters: parameters) else {
completion(.failure(AppError.unknownError))
return
}
URLSession.shared.dataTask(with: request) { data, response, error in
var result: Result<Data, Error>?
if let data = data {
result = .success(data)
let responseString = String(data: data, encoding: .utf8) ?? "Could not stringify our data"
print("The response is: (responseString)")
} else if let error = error {
result = .failure(error)
print("The error is " + error.localizedDescription)
}
DispatchQueue.main.async {
self.handleResponse(result: result, completion: completion)
}
}.resume()
}
private func handleResponse<T: Decodable>(result: Result<Data, Error>?, completion: (Result<T, Error>) -> Void) {
guard let result = result else {
completion(.failure(AppError.unknownError))
return
}
switch result {
case .success(let data):
let decoder = JSONDecoder()
guard let response = try? decoder.decode(ApiResponse.self, from: data) else {
completion(.failure(AppError.errorDecoding))
return
}
if let error = response.error {
completion(.failure(AppError.serverError(error)))
return
}
if let decodedData = response.data {
completion(.success(decodedData))
} else {
completion(.failure(AppError.unknownError))
}
case .failure(let error):
completion(.failure(error))
}
}
private func createRequest(route: Route, method: Method, parameters: [String: Any]? = nil) -> URLRequest? {
let urlString = Route.baseurl + route.description
guard let url = urlString.asUrl else {return nil}
var urlRequest = URLRequest(url: url)
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
urlRequest.httpMethod = method.rawValue
if let params = parameters {
switch method {
case .get:
var urlComponent = URLComponents(string: urlString)
urlComponent?.queryItems = params.map { URLQueryItem(name: $0, value: "($1)")}
urlRequest.url = urlComponent?.url
case .post:
let bodyData = try?JSONSerialization.data(withJSONObject: params, options: [])
urlRequest.httpBody = bodyData
}
}
return urlRequest
}
}
My PHP code
$postdata = json_decode( file_get_contents( "php://input" ), TRUE );
//$id = $postdata[ "email" ];
//$name = $postdata[ "password" ];
$result[ 'response' ] = "Success";
$result[ 'username' ] = "Mohammad Tariq Shamim";
// Store values in an array
$returnValue = array( $result );
$array['data'] = $returnValue;
// Send back request in JSON format
echo json_encode( $array );
//echo json_encode( array( 'response' => 'No data found for ' . $_POST[ 'email' ] ) );