dinotrnka

import Foundation

typealias CompletionHandler = (Data) -> Void
typealias FailureHandler = (APIError) -> Void

struct EmptyRequest: Encodable {} // Added this
struct EmptyResponse: Decodable {} // Added this

enum HTTPMethod: String {
    case get

dinotrnka

import Foundation

typealias CompletionHandler = (Data) -> Void
typealias FailureHandler = (APIError) -> Void

struct EmptyRequest: Encodable {} // Added this
struct EmptyResponse: Decodable {} // Added this

enum HTTPMethod: String {
    case get

dinotrnka

...
            
if viewModel.error == .noInternet {
    Text("No internet")
        .fontWeight(.bold)
        .foregroundColor(.red)
} else if viewModel.error != nil {
    Text("Login error")
        .fontWeight(.bold)
        .foregroundColor(.red)

dinotrnka

...

    static func call(
        scheme: String = Config.shared.scheme,
        host: String = Config.shared.host,
        path: String,
        method: HTTPMethod,
        parameters: Parameters? = nil,
        completion: @escaping CompletionHandler,
        failure: @escaping FailureHandler

dinotrnka

import Foundation

enum APIError: String, Error {
    case jsonDecoding
    case response
    case noInternet // Added this
}

dinotrnka

import SwiftUI

@main
struct SwiftUIBlueprintApp: App {
    
    init() {
        NetworkMonitor.shared.startMonitoring() // Added this
    }
    
    var body: some Scene {

dinotrnka

import Foundation
import Network

class NetworkMonitor {

    static let shared: NetworkMonitor = NetworkMonitor()

    let monitor = NWPathMonitor()
    private var status: NWPath.Status = .requiresConnection
    var isReachable: Bool { status == .satisfied }

dinotrnka

import SwiftUI

struct LoginScreen: View {
    
    @ObservedObject var viewModel: LoginViewModel = LoginViewModel()
    
    var body: some View {
        VStack {
            
            Spacer()

dinotrnka

import Foundation

class LoginViewModel: ObservableObject {

    @Published var username: String = ""
    @Published var password: String = ""

    @Published var error: APIError? // Added this
    
    func login() {

dinotrnka

import Foundation

struct LoginAction {
    let path = "/login"
    let method: HTTPMethod = .post
    var parameters: LoginRequest
    
    func call(
        completion: @escaping (LoginResponse) -> Void,
        failure: @escaping (APIError) -> Void // Added this