pboling/an_axe

module AnAxe
  module Forums
    class TopicsController < ApplicationController
      before_filter :find_forum_and_topic, :except => :index
      before_filter :login_required, :only => [:new, :create, :edit, :update, :destroy]

      helper AnAxe::Forums::TopicsHelper

      #TODO: put page parameter in URL path so :index & :show can be cached
      #cache_action :index, :show # how to cache rss?
      #cache_sweeper AnAxe::PostsSweeper, :only => [ :create, :update, :destroy ]

      def index
        respond_to do |format|
          format.html { redirect_to forum_path(params[:forum_id]) }
          format.xml do
            @topics = AnAxe::Topic.paginate_by_forum_id(params[:forum_id], :order => 'sticky desc, replied_at desc', :page => params[:page])
            render :xml => @topics.to_xml
          end
        end
      end

      def new
        @topic = Topic.new
        respond_to do |format|
          format.html
        end
      end

      def show
        respond_to do |format|
          format.html do
            # see notes in application.rb on how this works
            update_last_seen_at
            # keep track of when we last viewed this topic for activity indicators
            (session[:topics] ||= {})[@topic.id] = Time.now.utc if logged_in?
            # authors of topics don't get counted towards total hits
            @topic.hit! unless logged_in? and @topic.send(AnAxe::Config.user_relation) == current_user
            @posts = @topic.posts.paginate :page => params[:page]
            AnAxe::Config.user_class.find(:all, :conditions => ['id IN (?)', @posts.collect { |p| p.user_id }.uniq]) unless @posts.blank?
            @post   = AnAxe::Post.new
          end
          format.xml do
            render :xml => @topic.to_xml
          end
          format.rss do
            @posts = @topic.posts.find(:all, :order => 'created_at desc', :limit => 25)
            render :action => 'show', :layout => false
          end
        end
      end

      def create
        topic_saved, post_saved = false, false
        # this is icky - move the topic/first post workings into the topic model?
        AmAxe::Topic.transaction do
          @topic  = @forum.topics.build(params[:topic])
          assign_protected
          @post = @topic.posts.build(params[:topic])

          # The tags don't seem to set properly with a build call, so we check
          # for them manually and set them if found
          @post.body_list = params[:topic]['body_list'] if params[:topic]['body_list']

          @post.topic = @topic
          @post.send("#{AnAxe::Config.user_relation}=", current_user)
          # only save topic if post is valid so in the view topic will be a new record if there was an error
          @topic.body = @post.body # incase save fails and we go back to the form
          topic_saved = @topic.save if @post.valid?
          post_saved = @post.save
        end

        if topic_saved && post_saved
          respond_to do |format|
            format.html { redirect_to forums_forum_topic_path(@forum, @topic) }
            format.xml  { head :created, :location => topic_url(:forum_id => @forum, :id => @topic, :format => :xml) }
          end
        else
          render :action => "new"
        end
      end

      def update
        @topic.attributes = params[:topic]
        assign_protected
        @topic.save!
        respond_to do |format|
          format.html { redirect_to forums_forum_topic_path(@forum, @topic) }
          format.xml  { head 200 }
        end
      end

      def destroy
        @topic.destroy
        flash[:notice] = t("savage_beast.topic_deleted_message", :topic => @topic.title)
        respond_to do |format|
          format.html { redirect_to forum_path(@forum) }
          format.xml  { head 200 }
        end
      end

      protected
        def assign_protected
          @topic.send("#{AnAxe::Config.user_relation}=", current_user) if @topic.new_record?
          # admins and moderators can sticky and lock topics
          return unless admin? or current_user.moderator_of?(@topic.forum)
          @topic.sticky, @topic.locked = params[:topic][:sticky], params[:topic][:locked]
          # only admins can move
          return unless admin?
          @topic.forum_id = params[:topic][:forum_id] if params[:topic][:forum_id]
        end

        def find_forum_and_topic
          @forum = AnAxe::Forum.find(params[:forum_id])
          @topic = @forum.topics.find(params[:id]) if params[:id]
        end

        def authorized?
          %w(new create).include?(action_name) || @topic.editable_by?(current_user)
        end
    end
  end
end