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#= require ./dom
{ matches } = Rails
toArray = (e) -> Array.prototype.slice.call(e)
Rails.serializeElement = (element, additionalParam) ->
inputs = [element]
inputs = toArray(element.elements) if matches(element, 'form')
params = []
inputs.forEach (input) ->
return unless input.name
if matches(input, 'select')
toArray(input.options).forEach (option) ->
params.push(name: input.name, value: option.value) if option.selected
else if input.type isnt 'radio' and input.type isnt 'checkbox' or input.checked
params.push(name: input.name, value: input.value)
params.push(additionalParam) if additionalParam
params.map (param) ->
if param.name?
"#{encodeURIComponent(param.name)}=#{encodeURIComponent(param.value)}"
else
param
.join('&')
# Helper function that returns form elements that match the specified CSS selector
# If form is actually a "form" element this will return associated elements outside the from that have
# the html form attribute set
Rails.formElements = (form, selector) ->
if matches(form, 'form')
toArray(form.elements).filter (el) -> matches(el, selector)
else
toArray(form.querySelectorAll(selector))
# Helper function which checks for blank inputs in a form that match the specified CSS selector
Rails.blankInputs = (form, selector, nonBlank) ->
foundInputs = []
requiredInputs = toArray(form.querySelectorAll(selector or 'input, textarea'))
checkedRadioButtonNames = {}
requiredInputs.forEach (input) ->
if input.type is 'radio'
# Don't count unchecked required radio as blank if other radio with same name is checked,
# regardless of whether same-name radio input has required attribute or not. The spec
# states https://www.w3.org/TR/html5/forms.html#the-required-attribute
radioName = input.name
# Skip if we've already seen the radio with this name.
unless checkedRadioButtonNames[radioName]
# If none checked
if form.querySelectorAll("input[type=radio][name='#{radioName}']:checked").length == 0
radios = form.querySelectorAll("input[type=radio][name='#{radioName}']")
foundInputs = foundInputs.concat(toArray(radios))
# We only need to check each name once.
checkedRadioButtonNames[radioName] = radioName
else
valueToCheck = if input.type is 'checkbox' then input.checked else !!input.value
foundInputs.push(input) if valueToCheck is nonBlank
foundInputs
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