class ForumController < ApplicationController
  helper :forum
  #caches_page :index, :forum

  # Use HubSsoLib for permissions management, as a layer on top of
  # the provision within RForum.

  @@hubssolib_permissions = HubSsoLib::Permissions.new({
                              :new  => [ :admin, :webmaster ],
                              :edit => [ :admin, :webmaster ],
                              :move => [ :admin, :webmaster ]
                            })

  def ForumController.hubssolib_permissions
    @@hubssolib_permissions
  end

  # Display the list of topics in a forum.
  def forum
    begin
      @forum = Forum.find(@params['id'])
      return if redirect_if_site_doesnt_match
    rescue ActiveRecord::RecordNotFound
      render_text "Forum not found", 404
      return
    end

    @title = @forum.name

    @page = @params['page'].to_i
    @page = 1 if @page == 0
    @topics_per_page = RForum::CONFIG[:topics_per_page]
    range = ((@page - 1) * @topics_per_page)..(@page * @topics_per_page)
    tag = @params['tag']
    @topics = @forum.get_topics_for_list(range, tag, @user.can_view_deleted_posts?)
    if @topics.size < @topics_per_page
      @last_page = true
    end

    if @topics.empty?
      render 'forum/forum', 200
    end

    if not @user.guest?
      topic_read_times = @user.topic_read_times

      @topics.each do |topic|
        topic['last_read_time'] = topic_read_times[topic.id]
      end
    end
  end

  # List all forums.
  def list
    @title = l(:forum_list_title)

    @forums.each{|f| f['last_post'] = f.get_last_post}
  end

  def index
    redirect_to :controller => 'forum', :action => 'list'
  end

  def search
    @title = l(:search_title)

    if @params['forums']
      @selected_forums = @params['forums'].collect {|id| id.to_i}
    else
      @selected_forums = (@forums.collect {|f| f.id})
    end

    if @params['query']
      @query = @params['query']
      @page_params = {'query' => @query}
      @page = @params['page'].to_i
      @page = 1 if @page == 0
      @posts_per_page = RForum::CONFIG[:search_results_per_page]

      @results = Post.search(@query, @selected_forums, @posts_per_page, (@page - 1) * @posts_per_page)

      if @results.size < @posts_per_page
        @last_page = true
      end
    end

  end

  def new
    raise RForum::SecurityError unless @user.admin?
    @title = l(:create_forum_title)
    @forum = Forum.new(@params['forum'])

    if @params['save']
      @forum.save
      redirect_to :action => 'list'
    else
      render_action 'edit'
    end
  end

  def edit
    raise RForum::SecurityError unless @user.admin?
    @title = l(:create_forum_title)

    @forum = Forum.find(@params['id'])

    if @params['save']
      Forum.update(@params['id'], @params['forum'])
      redirect_to :action => 'list'
    elsif @params['delete']
      # TODO: javascript confirmation is not sufficient because this operation
      # is pretty dangerous
      Forum.find(@params['id']).destroy
      redirect_to :action => 'list'
    end
  end

  def move
    raise RForum::SecurityError unless @user.admin?

    @forum = Forum.find(@params['id'])

    if @params['direction'] == 'up'
      @forum.move_higher
    elsif @params['direction'] == 'down'
      @forum.move_lower
    end

    redirect_to :action => 'list'
  end
end