#-- encoding: UTF-8
#-- copyright
# OpenProject Documents Plugin
#
# Former OpenProject Core functionality extracted into a plugin.
#
# Copyright (C) 2009-2014 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# 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.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

class Document < ActiveRecord::Base
  include Redmine::SafeAttributes
  belongs_to :project
  belongs_to :category, :class_name => "DocumentCategory", :foreign_key => "category_id"
  acts_as_attachable :delete_permission => :manage_documents

  acts_as_journalized
  acts_as_event title: Proc.new { |o| "#{Document.model_name.human}: #{o.title}" },
                url: Proc.new { |o| { controller: '/documents', action: 'show', id: o.id } },
                datetime: :created_on,
                author: ( Proc.new do |o|
                            o.attachments.find(:first, order: "#{Attachment.table_name}.created_on ASC").try(:author)
                          end)


  acts_as_searchable :columns => ['title', "#{table_name}.description"], :include => :project

  validates_presence_of :project, :title, :category
  validates_length_of :title, :maximum => 60

  scope :visible, lambda {|*args| { :include => :project,
                                    :conditions => Project.allowed_to_condition(args.first || User.current, :view_documents) } }
  scope :with_attachments, includes(:attachments).where("attachments.container_id is not NULL" )

  after_initialize :set_default_category

  attr_accessible :title, :description, :project, :category, :category_id

  safe_attributes 'category_id', 'title', 'description'

  def visible?(user=User.current)
    !user.nil? && user.allowed_to?(:view_documents, project)
  end

  def set_default_category
    self.category ||= DocumentCategory.default if new_record?
  end

  def updated_on
    unless @updated_on
      # attachments has a default order that conflicts with `created_on DESC`
      # #reorder removes that default order but rather than #unscoped keeps the
      # scoping by this document
      a = attachments.reorder('created_on DESC').first
      @updated_on = (a && a.created_on) || created_on
    end
    @updated_on
  end
end