/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

0 vote212 views1 answer
Swift set uicolor
Swift
1 vote211 views1 answer
How to find index of list item in Swift?
Swift
0 vote217 views1 answer
On edit input field provide default value if textfield get empty swift
Swift
0 vote208 views1 answer
Swift navigationbar not working
Swift
0 vote215 views2 answers
Swift uitextfield placeholder color
Swift
0 vote219 views1 answer
Swift uknow attrubute main
Swift
0 vote191 views1 answer
How to get dictonary key and value swift
Swift
1 vote222 views1 answer
String to decimal swift
Swift
0 vote216 views1 answer
Uilabel.text from array string
Swift
0 vote247 views1 answer
Swift 5 macos close app
Swift