# 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 Group < Principal
  has_and_belongs_to_many :users, :after_add => :user_added,
                                  :after_remove => :user_removed

  acts_as_customizable

  validates_presence_of :lastname
  validates_uniqueness_of :lastname, :case_sensitive => false
  validates_length_of :lastname, :maximum => 30

  before_destroy :remove_references_before_destroy

  def to_s
    lastname.to_s
  end

  alias :name :to_s

  def user_added(user)
    members.each do |member|
      next if member.project.nil?
      user_member = Member.find_by_project_id_and_user_id(member.project_id, user.id) || Member.new(:project_id => member.project_id, :user_id => user.id)
      member.member_roles.each do |member_role|
        user_member.member_roles << MemberRole.new(:role => member_role.role, :inherited_from => member_role.id)
      end
      user_member.save!
    end
  end

  def user_removed(user)
    members.each do |member|
      MemberRole.find(:all, :include => :member,
                            :conditions => ["#{Member.table_name}.user_id = ? AND #{MemberRole.table_name}.inherited_from IN (?)", user.id, member.member_role_ids]).each(&:destroy)
    end
  end

  def self.human_attribute_name(attribute_key_name, *args)
    attribute_key_name == 'lastname' ? l(:field_name) : super
  end

  private

  # Removes references that are not handled by associations
  def remove_references_before_destroy
    return if self.id.nil?

    Issue.update_all 'assigned_to_id = NULL', ['assigned_to_id = ?', id]
  end
end