1  # Redmine - project management software
   2  # Copyright (C) 2006-2012  Jean-Philippe Lang
   3  #
   4  # This program is free software; you can redistribute it and/or
   5  # modify it under the terms of the GNU General Public License
   6  # as published by the Free Software Foundation; either version 2
   7  # of the License, or (at your option) any later version.
   8  #
   9  # This program is distributed in the hope that it will be useful,
  10  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  # GNU General Public License for more details.
  13  #
  14  # You should have received a copy of the GNU General Public License
  15  # along with this program; if not, write to the Free Software
  16  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17 
  18  module Redmine #:nodoc:
  19    module CoreExtensions #:nodoc:
  20      module Date #:nodoc:
  21        # Custom date calculations
  22        module Calculations
  23          # Returns difference with specified date in months
  24          def months_ago(date = self.class.today)
  25            (date.year - self.year)*12 + (date.month - self.month)
  26          end
  27 
  28          # Returns difference with specified date in weeks
  29          def weeks_ago(date = self.class.today)
  30            (date.year - self.year)*52 + (date.cweek - self.cweek)
  31          end
  32        end
  33      end
  34    end
  35  end