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module ActionView
module Helpers
module AjaxHelper
include UrlHelper
def extract_remote_attributes!(options)
attributes = options.delete(:html) || {}
attributes.merge!(extract_update_attributes!(options))
attributes.merge!(extract_request_attributes!(options))
attributes["data-js-type"] = options.delete(:js_type) || "remote"
attributes
end
def remote_form_for(record_or_name_or_array, *args, &proc)
options = args.extract_options!
object_name = extract_object_name_for_form!(args, options, record_or_name_or_array)
concat(form_remote_tag(options))
fields_for(object_name, *(args << options), &proc)
concat('</form>'.html_safe!)
end
alias_method :form_remote_for, :remote_form_for
def form_remote_tag(options = {}, &block)
attributes = {}
attributes.merge!(extract_remote_attributes!(options))
attributes.merge!(options)
url = attributes.delete("data-url")
form_tag(attributes.delete(:action) || url, attributes, &block)
end
def link_to_remote(name, url, options = {})
attributes = {}
attributes.merge!(extract_remote_attributes!(options))
attributes.merge!(options)
html["data-update-position"] = options.delete(:position)
html["data-method"] = options.delete(:method)
html["data-remote"] = "true"
html.merge!(options)
url = url_for(url) if url.is_a?(Hash)
link_to(name, url, attributes)
end
def button_to_remote(name, options = {}, html_options = {})
attributes = html_options.merge!(:type => "button")
attributes.merge!(extract_remote_attributes!(options))
tag(:input, attributes)
end
def submit_to_remote(name, value, options = {})
html_options = options.delete(:html) || {}
html_options.merge!(:name => name, :value => value, :type => "submit")
attributes = extract_remote_attributes!(options)
attributes.merge!(html_options)
tag(:input, attributes)
end
def periodically_call_remote(options = {})
attributes = extract_observer_attributes!(options)
attributes["data-js-type"] = "periodical_executer"
script_decorator(attributes)
end
#TODO: Should name change to a css query? - BR
def observe_field(name, options = {})
options[:observed] = name
attributes = extract_observer_attributes!(options)
attributes["data-js-type"] = "field_observer"
script_decorator(attributes)
end
def observe_field(name, options = {})
if options[:url]
options[:url] = options[:url].is_a?(Hash) ? url_for(options[:url]) : options[:url]
end
if options[:frequency]
case options[:frequency]
when 0
options.delete(:frequency)
else
options[:frequency] = options[:frequency].to_i
end
end
if options[:with]
if options[:with] !~ /[\{=(.]/
options[:with] = "'#{options[:with]}=' + encodeURIComponent(value)"
else
options[:with] ||= 'value' unless options[:function]
end
end
if options[:function]
statements = options[:function] # || remote_function(options) # TODO: Need to implement remote function - BR
options[:function] = JSFunction.new(statements, "element", "value")
end
options[:name] = name
<<-SCRIPT
<script type="application/json" data-rails-type="observe_field">
//<![CDATA[
#{options.to_json}
// ]]>
</script>
SCRIPT
end
# TODO: Move to javascript helpers - BR
class JSFunction
def initialize(statements, *arguments)
@statements, @arguments = statements, arguments
end
def as_json(options = nil)
"function(#{@arguments.join(", ")}) {#{@statements}}"
end
end
module Rails2Compatibility
def set_callbacks(options, html)
[:complete, :failure, :success, :interactive, :loaded, :loading].each do |type|
html["data-#{type}-code"] = options.delete(type.to_sym)
end
options.each do |option, value|
if option.is_a?(Integer)
html["data-#{option}-code"] = options.delete(option)
end
end
end
def link_to_remote(name, url, options = nil)
if !options && url.is_a?(Hash) && url.key?(:url)
url, options = url.delete(:url), url
end
set_callbacks(options, options[:html] ||= {})
super
end
def button_to_remote(name, options = {}, html_options = {})
set_callbacks(options, html_options)
super
end
end
private
def extract_request_attributes!(options)
attributes = {}
attributes["data-method"] = options.delete(:method)
url = options.delete(:url)
attributes["data-url"] = url.is_a?(Hash) ? url_for(url) : url
#TODO: Remove all references to prototype - BR
if options.delete(:form)
attributes["data-parameters"] = 'Form.serialize(this)'
elsif submit = options.delete(:submit)
attributes["data-parameters"] = "Form.serialize('#{submit}')"
elsif with = options.delete(:with)
if with !~ /[\{=(.]/
attributes["data-with"] = "'#{with}=' + encodeURIComponent(value)"
else
attributes["data-with"] = with
end
end
purge_unused_attributes!(attributes)
end
def extract_update_attributes!(options)
attributes = {}
update = options.delete(:update)
if update.is_a?(Hash)
attributes["data-update-success"] = update[:success]
attributes["data-update-failure"] = update[:failure]
else
attributes["data-update-success"] = update
end
attributes["data-update-position"] = options.delete(:position)
purge_unused_attributes!(attributes)
end
def extract_observer_attributes!(options)
attributes = extract_remote_attributes!(options)
attributes["data-observed"] = options.delete(:observed)
callback = options.delete(:function)
frequency = options.delete(:frequency)
if callback
attributes["data-observer-code"] = create_js_function(callback, "element", "value")
end
if frequency && frequency != 0
attributes["data-frequency"] = frequency.to_i
end
purge_unused_attributes!(attributes)
end
def purge_unused_attributes!(attributes)
attributes.delete_if {|key, value| value.nil? }
attributes
end
def create_js_function(statements, *arguments)
"function(#{arguments.join(", ")}) {#{statements}}"
end
end
end
end
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