gafilianog / teddit Goto Github PK

Description:

username should not contain spaces " ". It is possible to use dash or underscore to separate between words like john-doe or john_doe.

Task

• Add validation case in

  Teddit/Teddit/RegisterViewController.swift

  Lines 56 to 88 in 50e9545

  	func validateUsername() throws -> String {
  	let username = usernameField.text!
  	if username.isEmpty {
  	throw ValidationError("Username cannot be empty.")
  	}
  	if username.count < 3 || username.count > 20 {
  	throw ValidationError("Username must be 4-20 characters.")
  	}
  	for char in username {
  	if char == "_" {
  	continue
  	}
  	if !char.isLetter && !char.isNumber {
  	throw ValidationError("Username must not contain special characters.")
  	}
  	}
  	var entity: User? = nil
  	do {
  	entity = try userRepo!.findByUsername(username: username)
  	} catch {
  	print("Cannot fetch from Core Data: \(error)")
  	}
  	if entity != nil {
  	throw ValidationError("Username is already taken.")
  	}
  	return username
  	}