pages_controller.rb

class Admin::PagesController < Admin::BaseController
  before_filter :find_page, :only => [:show, :update, :destroy]

  def index
    respond_to do |format|
      format.html {
        @pages = Page.paginate(
          :order => "created_at DESC",
          :page  => params[:page]
        )
        if @pages.empty?
          flash[:notice] = "Make your first page!"
          redirect_to(:action => :new)
        end
      }
    end
  end

  def create
    @page = Page.new(params[:page])
    if @page.save
      respond_to do |format|
        format.html {
          flash[:notice] = "Created page '#{@page.title}'"
          redirect_to(:action => 'show', :id => @page)
        }
      end
    else
      respond_to do |format|
        format.html { render :action => 'new',         :status => :unprocessable_entity }
      end
    end
  end
  
  def update
    if @page.update_attributes(params[:page])
      respond_to do |format|
        format.html {
          flash[:notice] = "Updated page '#{@page.title}'"
          redirect_to(:action => 'show', :id => @page)
        }
      end
    else
      respond_to do |format|
        format.html { render :action => 'show',        :status => :unprocessable_entity }
      end
    end
  end

  def show
    respond_to do |format|
      format.html {
        render :partial => 'page', :locals => {:page => @page} if request.xhr?
      }
    end
  end

  def new
    @page = Page.new
  end

  def preview
    @page = Page.build_for_preview(params[:page])

    respond_to do |format|
      format.js {
        render :partial => 'pages/page.html.erb'
      }
    end
  end

  def destroy
    undo_item = @page.destroy_with_undo

    respond_to do |format|
      format.html do
        flash[:notice] = "Deleted page '#{@page.title}'"
        redirect_to :action => 'index' 
      end
      format.json { 
        render :json => {
          :undo_path    => undo_admin_undo_item_path(undo_item),
          :undo_message => undo_item.description,
          :page         => @page
        }.to_json
      }
    end
  end

  protected

  def find_page
    @page = Page.find(params[:id])
  end
end