trustieforge/app/controllers/memos_controller.rb

class MemosController < ApplicationController
  default_search_scope :memos
  before_filter :find_forum, :only => [:new, :create, :preview]
  before_filter :find_attachments, :only => [:preview]
  before_filter :find_memo, :except => [:new, :create, :preview]
  before_filter :authenticate_user_edit, :only => [:edit, :update]
  before_filter :authenticate_user_destroy, :only => [:destroy]
  before_filter :require_login, :only => [:new, :create]
  
  helper :attachments
  include AttachmentsHelper

  layout 'base_memos'

  def quote
    @subject = @memo.subject
    @subject = "RE: #{@subject}" unless @subject.starts_with?('RE:')

    @content = "#{ll(Setting.default_language, :text_user_wrote, @memo.author)} <br/> &nbsp; "
    @content << @memo.content.to_s.strip.gsub(%r{<pre>((.|\s)*?)</pre>}m, '[...]').gsub(/(\r?\n|\r\n?)/, "\n") + "</blockquote>\n\n<br/>"
    @content = "<blockquote>" << @content
  end

  def new
    @memo = Memo.new
    @memo.forum_id = @forum.id

    respond_to do |format|
      format.html {
        render action: :new ,layout: 'base'
      }
      format.json { render json: @memo }
    end
  end
  
  def create
    @memo = Memo.new(params[:memo])
    @memo.forum_id = params[:forum_id]
    @memo.author_id = User.current.id

    @memo.save_attachments(params[:attachments] || (params[:memo] && params[:memo][:uploads]))

    respond_to do |format|
      if @memo.save
        format.html { redirect_to back_memo_url, notice: "#{l :label_memo_create_succ}" }
        format.json { render json: @memo, status: :created, location: @memo }
      else
        flash[:error] = "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}"
        # back_error_page = @memo.parent_id.nil? ? forum_path(@forum) : forum_memo_path(@forum, @memo.parent_id)
        format.html { redirect_to back_memo_or_forum_url}#, error: "#{l :label_memo_create_fail}: #{@memo.errors.full_messages[0]}" }
        format.json { render json: @memo.errors, status: :unprocessable_entity }
      end
    end
  end
  
  REPLIES_PER_PAGE = 20 unless const_defined?(:REPLIES_PER_PAGE)
  def show
    pre_count = REPLIES_PER_PAGE

    @memo = @memo.root # 取出楼主，防止输入帖子id让回复作为主贴显示
    @memo.update_column(:viewed_count, (@memo.viewed_count.to_i + 1))

    page = params[:page]
    if params[:r] && page.nil?
      offset = @memo.children.where("#{Memo.table_name}.id < ?", params[:r].to_i).count
      page = 1 + offset / pre_count
    else
      
    end
    @reply_count = @memo.children.count
    @reply_pages = Paginator.new @reply_count, pre_count, page
    @replies = @memo.children.
                includes(:author, :attachments).
                reorder("#{Memo.table_name}.created_at ASC").
                limit(@reply_pages.per_page).
                offset(@reply_pages.offset).
                all

    @mome_new = Memo.new


    # @memo = Memo.find_by_id(params[:id])
    # @forum = Forum.find(params[:forum_id])
    # @replies = @memo.replies
    # @mome_new = Memo.new
    
    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @memo }
      format.xml { render xml: @memo }
    end
  end

  def edit
    @replying = false
  end

  def update
    respond_to do |format|
      if( @memo.update_column(:subject, params[:memo][:subject]) && 
           @memo.update_column(:content, params[:memo][:content]) &&
           @memo.update_column(:sticky, params[:memo][:sticky]) &&
           @memo.update_column(:lock, params[:memo][:lock])) 
        @memo.save_attachments(params[:attachments] || (params[:memo] && params[:memo][:uploads]))
        # @memo.root.update_attribute(:updated_at, @memo.updated_at)
        format.html {redirect_to back_memo_url, notice: "#{l :label_memo_create_succ}"}
      else
        format.html { render action: "edit" }
        format.json { render json: @person.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy
    @memo.destroy

    respond_to do |format|
      # format.html { redirect_to @back_url }
      format.html { redirect_to back_memo_or_forum_url }
      format.json { head :no_content }
    end
  end

  private

  def find_memo
    return unless find_forum
    @memo = @forum.memos.find(params[:id])
  rescue ActiveRecord::RecordNotFound
    render_404
    nil
  end

  def find_forum
    @forum = Forum.find(params[:forum_id])
  rescue ActiveRecord::RecordNotFound
    render_404
    nil
  end

  def authenticate_user_edit
    find_memo
    render_403 unless @memo.editable_by? User.current
  end

  def authenticate_user_destroy
    find_memo
    render_403 unless @memo.destroyable_by? User.current
  end

  def back_memo_url
    forum_memo_path(@forum, (@memo.parent_id.nil? ? @memo : @memo.parent_id))
  end

  def back_memo_or_forum_url
    @memo.parent_id.nil? ? forum_url(@forum) : forum_memo_url(@forum, @memo.parent_id)
  end

end