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# Redmine - project management software

# Copyright (C) 2006-2011  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 AttachmentsController < ApplicationController

  before_filter :find_project

  before_filter :file_readable, :read_authorize, :except => :destroy

  before_filter :delete_authorize, :only => :destroy

  verify :method => :post, :only => :destroy

  def show

    if @attachment.is_diff?

      @diff = File.new(@attachment.diskfile, "rb").read

      render :action => 'diff'

    elsif @attachment.is_text? && @attachment.filesize <= Setting.file_max_size_displayed.to_i.kilobyte

      @content = File.new(@attachment.diskfile, "rb").read

      render :action => 'file'

    else

      download

    end

  end

  def download

    if @attachment.container.is_a?(Version) || @attachment.container.is_a?(Project)

      @attachment.increment_download

    end

    # images are sent inline

    send_file @attachment.diskfile, :filename => filename_for_content_disposition(@attachment.filename),

                                    :type => detect_content_type(@attachment),

                                    :disposition => (@attachment.image? ? 'inline' : 'attachment')

  end

  def destroy

    # Make sure association callbacks are called

    @attachment.container.attachments.delete(@attachment)

    redirect_to :back

  rescue ::ActionController::RedirectBackError

    redirect_to :controller => 'projects', :action => 'show', :id => @project

  end

private

  def find_project

    @attachment = Attachment.find(params[:id])

    # Show 404 if the filename in the url is wrong

    raise ActiveRecord::RecordNotFound if params[:filename] && params[:filename] != @attachment.filename

    @project = @attachment.project

  rescue ActiveRecord::RecordNotFound

    render_404

  end

  # Checks that the file exists and is readable

  def file_readable

    @attachment.readable? ? true : render_404

  end

  def read_authorize

    @attachment.visible? ? true : deny_access

  end

  def delete_authorize

    @attachment.deletable? ? true : deny_access

  end

  def detect_content_type(attachment)

    content_type = attachment.content_type

    if content_type.blank?

      content_type = Redmine::MimeType.of(attachment.filename)

    end

    content_type.to_s

  end

end