1 files changed, 100 insertions, 0 deletions
diff --git a/actionview/app/assets/javascripts/features/remote.coffee b/actionview/app/assets/javascripts/features/remote.coffee
new file mode 100644
index 0000000000..30a5dc21fa
--- /dev/null
+++ b/actionview/app/assets/javascripts/features/remote.coffee
@@ -0,0 +1,100 @@
+#= require_tree ../utils
+
+{
+  matches, getData, setData
+  fire, stopEverything
+  ajax, isCrossDomain
+  blankInputs, serializeElement
+} = Rails
+
+# Checks "data-remote" if true to handle the request through a XHR request.
+isRemote = (element) ->
+  value = element.getAttribute('data-remote')
+  value? and value isnt 'false'
+
+# Submits "remote" forms and links with ajax
+Rails.handleRemote = (e) ->
+  element = this
+
+  return true unless isRemote(element)
+  unless fire(element, 'ajax:before')
+    fire(element, 'ajax:stopped')
+    return false
+
+  withCredentials = element.getAttribute('data-with-credentials')
+  dataType = element.getAttribute('data-type') or 'script'
+
+  if matches(element, Rails.formSubmitSelector)
+    # memoized value from clicked submit button
+    button = getData(element, 'ujs:submit-button')
+    method = getData(element, 'ujs:submit-button-formmethod') or element.method
+    url = getData(element, 'ujs:submit-button-formaction') or element.getAttribute('action') or location.href
+
+    # strip query string if it's a GET request
+    url = url.replace(/\?.*$/, '') if method.toUpperCase() is 'GET'
+
+    if element.enctype is 'multipart/form-data'
+      data = new FormData(element)
+      data.append(button.name, button.value) if button?
+    else
+      data = serializeElement(element, button)
+
+    setData(element, 'ujs:submit-button', null)
+    setData(element, 'ujs:submit-button-formmethod', null)
+    setData(element, 'ujs:submit-button-formaction', null)
+  else if matches(element, Rails.buttonClickSelector) or matches(element, Rails.inputChangeSelector)
+    method = element.getAttribute('data-method')
+    url = element.getAttribute('data-url')
+    data = serializeElement(element, element.getAttribute('data-params'))
+  else
+    method = element.getAttribute('data-method')
+    url = Rails.href(element)
+    data = element.getAttribute('data-params')
+
+  ajax(
+    type: method or 'GET'
+    url: url
+    data: data
+    dataType: dataType
+    # stopping the "ajax:beforeSend" event will cancel the ajax request
+    beforeSend: (xhr, options) ->
+      if fire(element, 'ajax:beforeSend', [xhr, options])
+        fire(element, 'ajax:send', [xhr])
+      else
+        fire(element, 'ajax:stopped')
+        xhr.abort()
+    success: (args...) -> fire(element, 'ajax:success', args)
+    error: (args...) -> fire(element, 'ajax:error', args)
+    complete: (args...) -> fire(element, 'ajax:complete', args)
+    crossDomain: isCrossDomain(url)
+    withCredentials: withCredentials? and withCredentials isnt 'false'
+  )
+  stopEverything(e)
+
+# Check whether any required fields are empty
+# In both ajax mode and normal mode
+Rails.validateForm = (e) ->
+  form = this
+  return if form.noValidate or getData(form, 'ujs:formnovalidate-button')
+  # Skip other logic when required values are missing or file upload is present
+  blankRequiredInputs = blankInputs(form, Rails.requiredInputSelector, false)
+  if blankRequiredInputs.length > 0 and fire(form, 'ajax:aborted:required', [blankRequiredInputs])
+    stopEverything(e)
+
+Rails.formSubmitButtonClick = (e) ->
+  button = this
+  form = button.form
+  return unless form
+  # Register the pressed submit button
+  setData(form, 'ujs:submit-button', name: button.name, value: button.value) if button.name
+  # Save attributes from button
+  setData(form, 'ujs:formnovalidate-button', button.formNoValidate)
+  setData(form, 'ujs:submit-button-formaction', button.getAttribute('formaction'))
+  setData(form, 'ujs:submit-button-formmethod', button.getAttribute('formmethod'))
+
+Rails.handleMetaClick = (e) ->
+  link = this
+  method = (link.getAttribute('data-method') or 'GET').toUpperCase()
+  data = link.getAttribute('data-params')
+  metaClick = e.metaKey or e.ctrlKey
+  e.stopImmediatePropagation() if metaClick and method is 'GET' and not data