firebase-ios-sdk/FirebaseAuth/Sources/Swift/MultiFactor/MultiFactorSession.swift

// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import Foundation

#if os(iOS)
  /** @class FIRMultiFactorSession
      @brief Opaque object that identifies the current session to enroll a second factor or to
          complete sign in when previously enrolled. Identifies the current session to enroll a second factor or to complete sign in when
   previously enrolled. It contains additional context on the existing user, notably the confirmation
   that the user passed the first factor challenge.
          This class is available on iOS only.
   */
  @available(iOS 13, tvOS 13, macOS 10.15, macCatalyst 13, watchOS 7, *)
  @objc(FIRMultiFactorSession) open class MultiFactorSession: NSObject {
    /**
     @brief The ID token for an enroll flow. This has to be retrieved after recent authentication.
     */
    var idToken: String?

    /**
     @brief The pending credential after an enrolled second factor user signs in successfully with the
     first factor
     */
    var mfaPendingCredential: String?

    /**
     @brief Multi factor info for the current user.
     */
    var multiFactorInfo: MultiFactorInfo?

    /**
     @brief Current user object
     */
    var currentUser: User?

    class var sessionForCurrentUser: MultiFactorSession {
      // TODO: Fix for the right Auth instance. (broken in ObjC)
      guard let currentUser = Auth.auth().currentUser else {
        fatalError("Internal Auth Error: missing user for multifactor auth")
      }
      return .init(idToken: currentUser.tokenService.accessToken, currentUser: currentUser)
    }

    init(idToken: String, currentUser: User) {
      self.idToken = idToken
      self.currentUser = currentUser
    }

    init(mfaCredential: String?) {
      mfaPendingCredential = mfaCredential
    }
  }

#endif