forked from bellroy/radiant-page-preview-extension
/
preview_controller.rb
43 lines (40 loc) · 1.13 KB
/
preview_controller.rb
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class ClassChangedException < Exception; end
class PreviewController < ApplicationController
layout false
def show
Page.transaction do # Extra safe don't save anything voodoo
PagePart.transaction do
construct_page.process(request,response)
@performed_render = true
raise "Don't you dare save any changes"
end
end
rescue => exception
render :text => exception.message unless @performed_render
end
private
def page_class
classname = params[:page][:class_name].classify
if Page.descendants.collect(&:name).include?(classname)
classname.constantize
else
Page
end
end
def construct_page
if request.referer =~ %r{/admin/pages/(\d+)/child/new}
page = page_class.new(params[:page])
page.parent = Page.find($1)
elsif request.referer =~ %r{/admin/pages/edit/(\d+)}
page = Page.find($1).becomes(page_class)
page.parts = []
page.attributes = params[:page]
else
page = page_class.new(params[:page])
end
params.fetch(:part, []).each do |i, attrs|
page.parts.build(attrs)
end
return page
end
end