/Swift/Swift create a method who can return result or throw an error

Swift create a method who can return result or throw an error

class SecurityService {
  static func loginWith(email: String, password: String, callback: (error: NSError?, user: User?) -> Void) -> Void {

    let URL = ".."
    let params = [
      "email": email,
      "password": password
    ]

    HTTP.request(URL, method: "POST", params: params) { (error, result) in
      if let error = error {
        callback(error: error, user: nil)
      } else {
        guard let JSON = result else {
          let someDomain = "some_domain"
          let someCode = 100
          let someInfo = [NSLocalizedDescriptionKey: "No results were sent by the server."]

          let error = NSError(domain: someDomain, code: someCode, userInfo: someInfo)
          callback(error: error, user: nil)
          return
        }

        guard let name = JSON["name"] as? String, email = JSON["email"] as? String else {
          let someDomain = "some_domain"
          let someCode = 100
          let someInfo = [NSLocalizedDescriptionKey: "No user properties were sent by the server."]

          let error = NSError(domain: someDomain, code: someCode, userInfo: someInfo)
          callback(error: error, user: nil)
          return
        }

        let user = User(name: name, email: email)
        callback(error: nil, user: user)
      }
    }
  }
}

Source: stackoverflow.com

Similar codes

2 votes168 views2 answers
Swift reload tableview
Swift
0 vote205 views1 answer
Navigationbarhidden not working swiftui
Swift
1 vote145 views1 answer
Index of string in array swift
Swift
1 vote176 views1 answer
Change selection color uitableviewcell swift
Swift
1 vote152 views1 answer
How to remove subview siwft 5
Swift
0 vote198 views1 answer
Share local storage wkwebview swift
Swift
0 vote151 views1 answer
Underline text in storyboard xcode
Swift
1 vote154 views2 answers
How to remove the last item from an array in swift
Swift
0 vote135 views1 answer
Swift class init
Swift
1 vote92 views1 answer
Swift 5 delay dismiss view controller
Swift