linux-odyssey/packages/utils/src/auth.ts

export function isValidUsername(username: string): boolean {
  // check if the username is between 1 and 32 characters
  if (username.length > 32) {
    return false
  }

  // Define a regular expression pattern for a valid Linux username.
  const usernamePattern = /^[a-z][a-z0-9_-]*$/

  // Test the username against the pattern.
  if (!usernamePattern.test(username)) return false

  const reservedWords = [
    'root',
    'admin',
    'administrator',
    'sysadmin',
    'system',
    'daemon',
    'bin',
    'nobody',
    'nogroup',
    'guest',
    'user',
  ]
  if (reservedWords.includes(username)) {
    return false
  }
  return true
}

export function isValidEmail(email: string): boolean {
  // Define a regular expression pattern for a valid email address.
  const emailPattern = /^[\w-.+]+@([\w][\w-]*\.)+[\w-]{2,}$/

  // Test the email against the pattern.
  return emailPattern.test(email)
}