validates emails with hooks for doing other things

emails.coffee

validateEmail = (email, input) ->
  emailPattern = /^[A-Za-z0-9](([_\.\-+]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$/i
  if emailPattern.test(email)
    addSuccessCookie()
    return true
  else
    input.addClass('fail')
    return false

addSuccessCookie = () ->
  console.log "on success, I add the success cookie"

$('.submit-link').click ->
  form = $(this).prev()
  form.trigger('submit')

$('.newsletter-form').submit ->
  input = $(this).find('input')
  email = input.val().trim()
  validateEmail(email, input)