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# redMine - project management software

# Copyright (C) 2006-2007  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

  menu_item :boards

  default_search_scope :messages

  before_filter :find_board, :only => [:new, :preview]

  before_filter :find_message, :except => [:new, :preview]

  before_filter :authorize, :except => [:preview, :edit, :destroy]

  verify :method => :post, :only => [ :reply, :destroy ], :redirect_to => { :action => :show }

  verify :xhr => true, :only => :quote

  helper :watchers

  helper :attachments

  include AttachmentsHelper   

  REPLIES_PER_PAGE = 25 unless const_defined?(:REPLIES_PER_PAGE)

  # Show a topic and its replies

  def show

    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 self, @reply_count, REPLIES_PER_PAGE, page

    @replies =  @topic.children.find(:all, :include => [:author, :attachments, {:board => :project}],

                                           :order => "#{Message.table_name}.created_on ASC",

                                           :limit => @reply_pages.items_per_page,

                                           :offset => @reply_pages.current.offset)

    @reply = Message.new(:subject => "RE: #{@message.subject}")

    render :action => "show", :layout => false if request.xhr?

  end

  # Create a new topic

  def new

    @message = Message.new(params[:message])

    @message.author = User.current

    @message.board = @board

    if params[:message] && User.current.allowed_to?(:edit_messages, @project)

      @message.locked = params[:message]['locked']

      @message.sticky = params[:message]['sticky']

    end

    if request.post? && @message.save

      call_hook(:controller_messages_new_after_save, { :params => params, :message => @message})

      attachments = Attachment.attach_files(@message, params[:attachments])

      render_attachment_warning_if_needed(@message)

      redirect_to :action => 'show', :id => @message

    end

  end

  # Reply to a topic

  def reply

    @reply = Message.new(params[:reply])

    @reply.author = User.current

    @reply.board = @board

    @topic.children << @reply

    if !@reply.new_record?

      call_hook(:controller_messages_reply_after_save, { :params => params, :message => @reply})

      attachments = Attachment.attach_files(@reply, params[:attachments])

      render_attachment_warning_if_needed(@reply)

    end

    redirect_to :action => 'show', :id => @topic, :r => @reply

  end

  # Edit a message

  def edit

    (render_403; return false) unless @message.editable_by?(User.current)

    if params[:message]

      @message.locked = params[:message]['locked']

      @message.sticky = params[:message]['sticky']

    end

    if request.post? && @message.update_attributes(params[:message])

      attachments = Attachment.attach_files(@message, params[:attachments])

      render_attachment_warning_if_needed(@message)

      flash[:notice] = l(:notice_successful_update)

      @message.reload

      redirect_to :action => 'show', :board_id => @message.board, :id => @message.root, :r => (@message.parent_id && @message.id)

    end

  end

  # Delete a messages

  def destroy

    (render_403; return false) unless @message.destroyable_by?(User.current)

    @message.destroy

    redirect_to @message.parent.nil? ?

      { :controller => 'boards', :action => 'show', :project_id => @project, :id => @board } :

      { :action => 'show', :id => @message.parent, :r => @message }

  end

  def quote

    user = @message.author

    text = @message.content

    subject = @message.subject.gsub('"', '\"')

    subject = "RE: #{subject}" unless subject.starts_with?('RE:')

    content = "#{ll(Setting.default_language, :text_user_wrote, user)}\\n> "

    content << text.to_s.strip.gsub(%r{<pre>((.|\s)*?)</pre>}m, '[...]').gsub('"', '\"').gsub(/(\r?\n|\r\n?)/, "\\n> ") + "\\n\\n"

    render(:update) { |page|

      page << "$('reply_subject').value = \"#{subject}\";"

      page.<< "$('message_content').value = \"#{content}\";"

      page.show 'reply'

      page << "Form.Element.focus('message_content');"

      page << "Element.scrollTo('reply');"

      page << "$('message_content').scrollTop = $('message_content').scrollHeight - $('message_content').clientHeight;"

    }

  end

  def preview

    message = @board.messages.find_by_id(params[:id])

    @attachements = message.attachments if message

    @text = (params[:message] || params[:reply])[:content]

    render :partial => 'common/preview'

  end

private

  def find_message

    find_board

    @message = @board.messages.find(params[:id], :include => :parent)

    @topic = @message.root

  rescue ActiveRecord::RecordNotFound

    render_404

  end

  def find_board

    @board = Board.find(params[:board_id], :include => :project)

    @project = @board.project

  rescue ActiveRecord::RecordNotFound

    render_404

  end

end