custom_validation.coffee

# custom validation logic

$.validator.addMethod 'validateShipState', (value, element) ->
	# if the element contains an arbitrary piece of data called `custom-validator-exception`, don't allow form to validate.
	if $(element).data('custom-validator-exception')
		return false
	return true
,  ->
	return $("[name=s_state]").data('custom-validator-exception')

$shipForm = $(".form-shipping-step")
validator = $shipForm.validate
	rules:
		s_state:
			required: true
			validateShipState: true



# the event handlers setting the invalidation logic:

$("[name=s_country], [name=s_state]").on 'change', (ev) =>
	$this = $ ev.currentTarget

	$state.data('custom-validator-exception', 'Currently validating')  # this should never appear as nothing calls valid()
	$.ajax
		url: ''
		dataType: 'json'
		method: 'post'
		headers:
			X_AJAX_HANDLER: 'set_tax'
		data:
			country: $country.val()
			state: $state.val()

		success: (response) =>
			@updateTotals(response.cart)
			$state.data('custom-validator-exception', false)
			$state.valid()

		error: (xhr) =>
			response = $.parseJSON xhr.responseText
			# set custom validator exception value.. prevent this form from proceeding.
			$state.data('custom-validator-exception', response.message)
			$state.valid()