Ruby field-level input validator

def validate_user(input)
  errors = {}
  name = input[:name].to_s.strip
  email = input[:email].to_s.strip
  age = input[:age]

  errors[:name] = 'is required' if name.empty?
  errors[:email] = 'is required' if email.empty?
  errors[:email] ||= 'is invalid' unless email.match?(/\A[^@\s]+@[^@\s]+\.[^@\s]+\z/)
  errors[:age] = 'must be an integer' unless age.is_a?(Integer)
  errors[:age] ||= 'must be 13 or older' if age.is_a?(Integer) && age < 13
  errors
end