# Redmine - project management software
# Copyright (C) 2006-2013  Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

class MessagesController < ApplicationController
  include ApplicationHelper
  before_filter :authorize1, :only => [:show]
  menu_item :boards
  default_search_scope :messages
  before_filter :find_board, :only => [:new, :preview,:edit]
  before_filter :find_attachments, :only => [:preview]
  before_filter :find_message, :except => [:new, :preview]
  before_filter :authorize, :except => [:preview, :edit, :destroy, :new]

  helper :boards
  helper :watchers
  helper :attachments
  include AttachmentsHelper
  helper :project_score

  include CoursesHelper

  REPLIES_PER_PAGE = 25 unless const_defined?(:REPLIES_PER_PAGE)

  # Show a topic and its replies
  def show
    if @course
      topic_id = params[:r]?params[:r]:params[:id]
      parent_id = params[:id]
      url = course_boards_path(@course,:topic_id => topic_id,:parent_id=>parent_id);
      redirect_to url
      return;
    end

    @isReply = true
    page = params[:page]
    # Find the page of the requested reply
    if params[:r] && page.nil?
      offset = @topic.children.count(:conditions => ["#{Message.table_name}.id < ?", params[:r].to_i])
      page = 1 + offset / REPLIES_PER_PAGE
    end

    @reply_count = @topic.children.count
    # @reply_pages = Paginator.new @reply_count, REPLIES_PER_PAGE, page
    # @replies =  @topic.children.
    #   includes(:author, :attachments, {:board => :project}).
    #   reorder("#{Message.table_name}.created_on DESC").
    #   limit(@reply_pages.per_page).
    #   offset(@reply_pages.offset).
    #   all

    @reply = Message.new(:subject => "RE: #{@message.subject}")
    if @course
      messages_replies =  @topic.children.
          includes(:author, :attachments, {:board => :project}).
          reorder("#{Message.table_name}.created_on DESC").
          #limit(@reply_pages.per_page).
          #offset(@reply_pages.offset).
          all
      @replies = paginateHelper messages_replies,10
      @reply = Message.new(:subject => "RE: #{@message.subject}")
      render :action => "show", :layout => "base_courses"#by young
    else
      @reply_pages = Paginator.new @reply_count, REPLIES_PER_PAGE, page
      @replies =  @topic.children.
          includes(:author, :attachments, {:board => :project}).
          reorder("#{Message.table_name}.created_on DESC").
          limit(@reply_pages.per_page).
          offset(@reply_pages.offset).
          all

      @reply = Message.new(:subject => "RE: #{@message.subject}")
      render :action => "show", :layout => "base_projects"#by young
    end
  end

  # Create a new topic
  def new
    @message = Message.new
    @message.author = User.current
    @message.board = @board
    @message.safe_attributes = params[:message]
    if request.post?
      @message.save_attachments(params[:attachments])
      if @message.save
        # 更新kindeditor上传的图片资源所有者
        if params[:asset_id]
          ids = params[:asset_id].split(',')
          update_kindeditor_assets_owner ids,@message.id,OwnerTypeHelper::MESSAGE
        end
        # 与我相关动态的记录add start
        if(@board && @board.course) #项目的先不管
          teachers = searchTeacherAndAssistant(@board.course)
          for teacher in teachers
            if(teacher.user_id != User.current.id)
              notify = ActivityNotify.new()
              if(@board.course)
                notify.activity_container_id = @board.course_id
                notify.activity_container_type = 'Course'
              else
                notify.activity_container_id = @board.project_id
                notify.activity_container_type = 'Project'
              end
              notify.activity_id = @message.id
              notify.activity_type = 'Message'
              notify.notify_to = teacher.user_id
              notify.is_read = 0
              notify.save()
            end
          end
        end
        # 与我相关动态的记录add end

        call_hook(:controller_messages_new_after_save, { :params => params, :message => @message})
        render_attachment_warning_if_needed(@message)
        if params[:is_board]
          if @project
            redirect_to project_boards_path(@project)
          elsif @course
            redirect_to course_boards_path(@course)
          end
        else
          redirect_to board_message_url(@board, @message)
        end
      else
        if params[:is_board]
          if @project
            redirect_to project_boards_path(@project, :flag => true)
          elsif @course
            redirect_to course_boards_path(@course, :flag => true)
          end
        else
          layout_file = @project ? 'base_projects' : 'base_courses'
          render :action => 'new', :layout => layout_file
        end

      end
    else
      respond_to do |format|
        format.html {
          layout_file = @project ? 'base_projects' : 'base_courses'
          render :layout => layout_file
        }
      end
    end
  end

  # Reply to a topic
  def reply
    if params[:reply][:content] == ""
      if params[:is_board]
        if @project
          (redirect_to project_boards_path(@project), :notice => l(:label_reply_empty);return)
        elsif @course
          (redirect_to course_boards_path(@course), :notice => l(:label_reply_empty);return)
        end
      else
        (redirect_to board_message_url(@board, @topic, :r => @reply), :notice => l(:label_reply_empty);return)
      end
    end
    @quote = params[:quote][:quote]
    @reply = Message.new
    @reply.author = User.current
    @reply.board = @board
    @reply.safe_attributes = params[:reply]
    @reply.content = @quote + @reply.content
    @topic.children << @reply
    #@topic.update_attribute(:updated_on, Time.now)
    if !@reply.new_record?
      if params[:asset_id]
        ids = params[:asset_id].split(',')
        update_kindeditor_assets_owner ids,@reply.id,OwnerTypeHelper::MESSAGE
      end

      # 与我相关动态的记录add start
      if(@board && @board.course) #项目的先不管
        notifyto_arr = {}
        notifyto_arr[@topic.author_id] = @topic.author_id
        if( params[:parent_topic] != nil && params[:parent_topic] != '')
          parent_topic = Message.find(params[:parent_topic])
          notifyto_arr[parent_topic.author_id] = parent_topic.author_id
        end
        notifyto_arr.each do |k,user_id|
          if(user_id != User.current.id)
            notify = ActivityNotify.new()
            if(@board.course)
              notify.activity_container_id = @board.course_id
              notify.activity_container_type = 'Course'
            else
              notify.activity_container_id = @board.project_id
              notify.activity_container_type = 'Project'
            end
            notify.activity_id = @reply.id
            notify.activity_type = 'Message'
            notify.notify_to = user_id
            notify.is_read = 0
            notify.save()
          end
        end
      end
      # 与我相关动态的记录add end

      call_hook(:controller_messages_reply_after_save, { :params => params, :message => @reply})
      attachments = Attachment.attach_files(@reply, params[:attachments])
      render_attachment_warning_if_needed(@reply)
    else
      #render file: 'messages#show', layout: 'base_courses'
    end
    if params[:is_board]
      if @project
        redirect_to project_boards_path(@project)
      elsif @course
        redirect_to course_boards_path(@course)
      end
    else
      redirect_to board_message_url(@board, @topic, :r => @reply)
    end

  end

  # Edit a message
  def edit
    @isReply = false
    if @project
      (render_403; return false) unless @message.editable_by?(User.current)
    else
      (render_403; return false) unless @message.course_editable_by?(User.current)
    end

    @message.safe_attributes = params[:message]
    if request.post? && @message.save
      attachments = Attachment.attach_files(@message, params[:attachments])
      render_attachment_warning_if_needed(@message)
      flash[:notice] = l(:notice_successful_update)
      @message.reload
      if params[:is_board]
        if @project
          redirect_to project_boards_path(@project)
        elsif @course
          redirect_to course_boards_path(@course)
        end
      else
        redirect_to board_message_url(@message.board, @message.root, :r => (@message.parent_id && @message.id))
      end
    elsif request.get? || request.post?
      if params[:is_board]
        if @project
          redirect_to project_boards_path(@project)
        elsif @course
          redirect_to course_boards_path(@course)
        end
      else
        respond_to do |format|
          format.html {
            layout_file = @project ? 'base_projects' : 'base_courses'
            render :layout => layout_file
          }
        end
      end
    end
  end

  # Delete a messages
  def destroy
    if @project
      (render_403; return false) unless @message.destroyable_by?(User.current)
    else
      (render_403; return false) unless @message.course_destroyable_by?(User.current)
    end
    r = @message.to_param
    @message.destroy
    # modify by nwb
    if @project
      if params[:is_board]
        redirect_to project_boards_url(@project)
      else
        redirect_to board_message_url(@board, @topic, :r => @reply)
      end
    elsif @course
      if params[:is_board]
        redirect_to course_boards_url(@course)
      else
        if @message.parent
          redirect_to board_message_url(@board, @message.parent, :r => r)
        else
          redirect_to course_board_url(@course, @board)
        end
      end
    end
  end

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

    @content = "> #{ll(Setting.default_language, :text_user_wrote, @message.author)}\n> "
    @temp = Message.new
    @temp.content = "<blockquote>#{ll(Setting.default_language, :text_user_wrote, @message.author)} <br/>#{@message.content.html_safe}</blockquote>".html_safe
  end

  def preview
    message = @board.messages.find_by_id(params[:id])
    @text = (params[:message] || params[:reply])[:content]
    @previewed = message
    render :partial => 'common/preview'
  end

  private
  def find_message
    return unless find_board
    @message = @board.messages.find(params[:id], :include => :parent)
    @topic = @message.root
  rescue ActiveRecord::RecordNotFound
    render_404
  end

  def find_board
    #modify by nwb
    @board = Board.find(params[:board_id])
    if @board.project_id != -1 && @board.project_id != nil
      @project = @board.project
    elsif  @board.course_id
      @course = @board.course
    end

  rescue ActiveRecord::RecordNotFound
    render_404
    nil
  end
end