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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.

module Redmine

  module Acts

    module Attachable

      def self.included(base)

        base.extend ClassMethods

      end

      module ClassMethods

        def acts_as_attachable(options = {})

          cattr_accessor :attachable_options

          self.attachable_options = {}

          attachable_options[:view_permission] = options.delete(:view_permission) || "view_#{self.name.pluralize.underscore}".to_sym

          attachable_options[:delete_permission] = options.delete(:delete_permission) || "edit_#{self.name.pluralize.underscore}".to_sym

          has_many :attachments, options.merge(:as => :container,

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

                                               :dependent => :destroy)

          attr_accessor :unsaved_attachments

          after_initialize :initialize_unsaved_attachments

          send :include, Redmine::Acts::Attachable::InstanceMethods

        end

      end

      module InstanceMethods

        def self.included(base)

          base.extend ClassMethods

        end

        def attachments_visible?(user=User.current)

          (respond_to?(:visible?) ? visible?(user) : true) &&

            user.allowed_to?(self.class.attachable_options[:view_permission], self.project)

        end

        def attachments_deletable?(user=User.current)

          (respond_to?(:visible?) ? visible?(user) : true) &&

            user.allowed_to?(self.class.attachable_options[:delete_permission], self.project)

        end

        def initialize_unsaved_attachments

          @unsaved_attachments ||= []

        end

        module ClassMethods

        end

      end

    end

  end

end