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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 MemberRole < ActiveRecord::Base

  belongs_to :member

  belongs_to :role

  after_destroy :remove_member_if_empty

  after_create :add_role_to_group_users

  after_destroy :remove_role_from_group_users

  validates_presence_of :role

  def validate

    errors.add :role_id, :invalid if role && !role.member?

  end

  def inherited?

    !inherited_from.nil?

  end

  private

  def remove_member_if_empty

    if member.roles.empty?

      member.destroy

    end

  end

  def add_role_to_group_users

    if member.principal.is_a?(Group)

      member.principal.users.each do |user|

        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)

        user_member.member_roles << MemberRole.new(:role => role, :inherited_from => id)

        user_member.save!

      end

    end

  end

  def remove_role_from_group_users

    MemberRole.find(:all, :conditions => { :inherited_from => id }).group_by(&:member).each do |member, member_roles|

      member_roles.each(&:destroy)

      if member && member.user

        Watcher.prune(:user => member.user, :project => member.project)

      end

    end

  end

end