LONDON-IOS/GME Remit/Utilities/KeyChain.swift

//
//  KeyChain.swift
//  GME Remit
//
//  Created by InKwon Devik Kim on 08/04/2019.
//  Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation
import KeychainAccess

final class KeyChain {
  
  enum KeyType: String {
    case password
    case id
    case biometricAuth
    case login
    case temporaryID
    case temporaryPW
  }
  
  static let shared = KeyChain()
  private var keychain: Keychain
  
  private init() {
    self.keychain = Keychain(service: "com.gme.gmeremit")
    
    // There is no userId, it's logout or remove app all and reinstall app.
    if GMEDB.shared.user.string(.userId) == nil {
      try? keychain.removeAll()
    }
  }
  
  func save(data: String, key: KeyType) {
    do {
      try self.keychain.set(data, key: key.rawValue)
    } catch let error {
      print("keychain save error: \(error.localizedDescription)")
    }
  }
  
  func get(key: KeyType) -> String? {
    guard let pw = ((try? self.keychain.get(key.rawValue)) as String??) else {
      return nil
    }
    
    return pw
  }
  
  func remove(key: KeyType) {
    do {
      try self.keychain.remove(key.rawValue)
    } catch let error {
      print("keychain remove error: \(error.localizedDescription)")
    }
  }
  
  func removeAll() {
    do {
      try self.keychain.removeAll()
    } catch let error {
      print("keychain remove error: \(error.localizedDescription)")
    }
  }
}