class TopicsController < ApplicationController
  before_filter :find_forum_and_topic, :except => :index

  @@hubssolib_permissions = HubSsoLib::Permissions.new({
                              :new     => [ :admin, :webmaster, :privileged, :normal ],
                              :create  => [ :admin, :webmaster, :privileged, :normal ],
                              :edit    => [ :admin, :webmaster ],
                              :update  => [ :admin, :webmaster ],
                              :destroy => [ :admin, :webmaster ],
                            })

  def TopicsController.hubssolib_permissions
    @@hubssolib_permissions
  end

  def index
    respond_to do |format|
      format.html { redirect_to forum_path(params[:forum_id]) }
      format.xml do
        @topics = Topic.find_all_by_forum_id(params[:forum_id], :order => 'sticky desc, replied_at desc', :limit => 25)
        render :xml => @topics.to_xml
      end
    end
  end

  def new
    @topic = Topic.new
  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.user == current_user
        per_page = [params[:posts_per_page].to_i, 25].max
        @post_pages, @posts = paginate(:posts, :per_page => per_page, :order => 'posts.created_at', :include => :user, :conditions => ['posts.topic_id = ?', params[:id]])
        @voices = @posts.map(&:user) ; @voices.uniq!
        @post   = 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 => 50)
        render :action => 'show.rxml', :layout => false
      end
    end
  end

  def create
    # this is icky - move the topic/first post workings into the topic model?
    Topic.transaction do
      @topic  = @forum.topics.build(params[:topic])
      assign_protected
      @topic.save!
      @post   = @topic.posts.build(params[:topic])
      @post.user = current_user
      @post.save!
    end
    respond_to do |format|
      format.html { redirect_to topic_path(@forum, @topic) }
      format.xml  { head :created, :location => formatted_topic_url(:forum_id => @forum, :id => @topic, :format => :xml) }
    end
  rescue ActiveRecord::RecordInvalid
    flash[:error] = "Your topic's first post was empty, or contained prohibited words"
    respond_to do |format|
      format.html { redirect_to forum_path(@forum) }
      format.xml  { render :xml => @post.errors.to_xml, :status => 400 }
    end
  end

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

  def destroy
    @topic.destroy
    flash[:notice] = "Topic '#{CGI::escapeHTML @topic.title}' was deleted."
    respond_to do |format|
      format.html { redirect_to forum_path(@forum) }
      format.xml  { head 200 }
    end
  end

  protected
    def assign_protected
      @topic.user     = 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 = 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