class CommentsController < ApplicationController
  respond_to :html, :xml, :json
  before_filter :member_only, :only => [:update, :create, :edit, :destroy]
  rescue_from User::PrivilegeError, :with => "static/access_denied"

  def index
    if params[:group_by] == "comment"
      index_by_comment
    elsif request.format == Mime::JS
      index_for_post
    else
      index_by_post
    end
  end
  
  def search
    @search = Comment.search(params[:search])
  end
  
  def update
    @comment = Comment.find(params[:id])
    check_privilege(@comment)
    @comment.update_attributes(params[:comment])
    respond_with(@comment, :location => post_path(@comment.post_id))
  end
  
  def create
    @comment = Comment.create(params[:comment])
    respond_with(@comment) do |format|
      format.html do
        redirect_to post_path(@comment.post), :notice => "Comment posted"
      end
    end
  end
  
  def edit
    @comment = Comment.find(params[:id])
    check_privilege(@comment)
    respond_with(@comment)
  end
  
  def show
    @comment = Comment.find(params[:id])
    respond_with(@comment) do |format|
      format.json {render :json => @comment.to_json(:methods => [:creator_name])}
    end
  end
  
  def destroy
    @comment = Comment.find(params[:id])
    check_privilege(@comment)
    @comment.destroy
    respond_with(@comment) do |format|
      format.js
    end
  end
  
private
  def index_for_post
    @post = Post.find(params[:post_id])
    @comments = @post.comments
    @comments = @comments.visible(CurrentUser.user) unless params[:include_below_threshold]
    render :action => "index_for_post"
  end

  def index_by_post
    @posts = Post.commented_before(Time.now).tag_match(params[:tags]).paginate(params[:page])
    respond_with(@posts) do |format|
      format.html {render :action => "index_by_post"}
    end
  end
  
  def index_by_comment
    @search = Comment.search(params[:search])
    @comments = @search.paginate(params[:page])
    respond_with(@comments) do |format|
      format.html {render :action => "index_by_comment"}
    end
  end
  
  def check_privilege(comment)
    if !comment.editable_by?(CurrentUser.user)
      raise User::PrivilegeError
    end
  end
end