# redMine - project management software
# Copyright (C) 2006  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 Tracker < ActiveRecord::Base
  before_destroy :check_integrity  
  has_many :issues
  has_many :workflows, :dependent => :delete_all do
    def copy(tracker)
      raise "Can not copy workflow from a #{tracker.class}" unless tracker.is_a?(Tracker)
      raise "Can not copy workflow from/to an unsaved tracker" if proxy_owner.new_record? || tracker.new_record?
      clear
      connection.insert "INSERT INTO #{Workflow.table_name} (tracker_id, old_status_id, new_status_id, role_id)" +
                        " SELECT #{proxy_owner.id}, old_status_id, new_status_id, role_id" +
                        " FROM #{Workflow.table_name}" +
                        " WHERE tracker_id = #{tracker.id}"
    end
  end
  
  has_and_belongs_to_many :projects
  has_and_belongs_to_many :custom_fields, :class_name => 'IssueCustomField', :join_table => "#{table_name_prefix}custom_fields_trackers#{table_name_suffix}", :association_foreign_key => 'custom_field_id'
  acts_as_list

  validates_presence_of :name
  validates_uniqueness_of :name
  validates_length_of :name, :maximum => 30
  validates_format_of :name, :with => /^[\w\s\'\-]*$/i

  def to_s; name end
  
  def <=>(tracker)
    name <=> tracker.name
  end

  def self.all
    find(:all, :order => 'position')
  end
  
private
  def check_integrity
    raise "Can't delete tracker" if Issue.find(:first, :conditions => ["tracker_id=?", self.id])
  end
end