HKSingleParty/99_references/supabase-examples/user-management/swift-user-management/swift-user-management/AuthView.swift

//
//  AuthView.swift
//  UserManagement
//
//  Created by Guilherme Souza on 17/11/23.
//

import Supabase
import SwiftUI

struct AuthView: View {
  @State var email = ""
  @State var isLoading = false
  @State var result: Result<Void, Error>?

  var body: some View {
    Form {
      Section {
        TextField("Email", text: $email)
          .textContentType(.emailAddress)
          .autocorrectionDisabled()
        #if os(iOS)
          .textInputAutocapitalization(.never)
        #endif
      }

      Section {
        Button("Sign in") {
          signInButtonTapped()
        }

        if isLoading {
          ProgressView()
        }
      }

      if let result {
        Section {
          switch result {
          case .success: Text("Check you inbox.")
          case let .failure(error): Text(error.localizedDescription).foregroundStyle(.red)
          }
        }
      }
    }
    .onMac { $0.padding() }
    .onOpenURL(perform: { url in
      Task {
        do {
          try await supabase.auth.session(from: url)
        } catch {
          result = .failure(error)
        }
      }
    })
  }

  func signInButtonTapped() {
    Task {
      isLoading = true
      defer { isLoading = false }

      do {
        try await supabase.auth.signInWithOTP(
          email: email,
          redirectTo: URL(string: "io.supabase.user-management://login-callback")
        )
        result = .success(())
      } catch {
        result = .failure(error)
      }
    }
  }
}

#if swift(>=5.9)
  #Preview {
    AuthView()
  }
#endif