class WikisController < ApplicationController
  before_filter :project
  before_filter :add_project_abilities
  before_filter :authorize_read_wiki!
  before_filter :authorize_write_wiki!, :except => [:show, :destroy]
  before_filter :authorize_admin_wiki!, :only => :destroy
  layout "project"
  
  def show
    if params[:old_page_id]
      @wiki = @project.wikis.find(params[:old_page_id])
    else
      @wiki = @project.wikis.where(:slug => params[:id]).order("created_at").last
    end
    respond_to do |format|
      if @wiki
        format.html
      else
        @wiki = @project.wikis.new(:slug => params[:id])
        format.html { render "edit" }
      end
    end
  end

  def edit
    @wiki = @project.wikis.where(:slug => params[:id]).order("created_at").last
    @wiki = Wiki.regenerate_from @wiki
  end

  def create
    @wiki = @project.wikis.new(params[:wiki])
    @wiki.user = current_user

    respond_to do |format|
      if @wiki.save
        format.html { redirect_to [@project, @wiki], notice: 'Wiki was successfully updated.' }
      else
        format.html { render action: "edit" }
      end
    end
  end

  def history
    @wikis = @project.wikis.where(:slug => params[:id]).order("created_at")
  end
  
  def destroy
    @wikis = @project.wikis.where(:slug => params[:id]).delete_all

    respond_to do |format|
      format.html { redirect_to project_wiki_path(@project, :index), notice: "Page was successfully deleted" }
    end
  end

  protected 

  def authorize_read_wiki!
    can?(current_user, :read_wiki, @project)
  end

  def authorize_write_wiki!
    can?(current_user, :write_wiki, @project)
  end

  def authorize_admin_wiki!
    can?(current_user, :admin_wiki, @project)
  end
end