udacitywiki/errors.py at master · gavinconran/udacitywiki · GitHub

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import re

error_messages = {
                  "username_error": "That's not a valid username.",
                  "password_error": "That wasn't a valid password.",
                  "verify_error": "Your passwords didn't match.",
                  "email_error": "That's not a valid email."
                  }

USER_RE = re.compile(r"^[a-zA-Z0-9_-]{3,20}$")
def valid_username(username):
  return username and USER_RE.match(username)

USER_PWD = re.compile(r"^.{3,20}$")
def valid_password(password):
  return password and USER_PWD.match(password)

USER_EMAIL = re.compile(r"^[\S]+@[\S]+\.[\S]+$")
def valid_email(email):
  return not email or USER_EMAIL.match(email)

def GenerateErrorMessages(user_name, user_password, user_verify, user_email):
  params = dict(username = user_name, email = user_email)
  count = 0

  if not valid_username(user_name):
    params['username_error'] = error_messages["username_error"]
    count+= 1

  if not valid_password(user_password):
    params['password_error'] = error_messages["password_error"]
    count+= 1

  if not(user_password == user_verify):
    params['verify_error'] = error_messages["verify_error"]
    count+= 1

  if not valid_email(user_email):
    params['email_error'] = error_messages["email_error"]
    count+= 1

  return (count, params)