Chris@909: # Redmine - project management software
Chris@909: # Copyright (C) 2006-2011  Jean-Philippe Lang
Chris@0: #
Chris@0: # This program is free software; you can redistribute it and/or
Chris@0: # modify it under the terms of the GNU General Public License
Chris@0: # as published by the Free Software Foundation; either version 2
Chris@0: # of the License, or (at your option) any later version.
Chris@909: #
Chris@0: # This program is distributed in the hope that it will be useful,
Chris@0: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@0: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@0: # GNU General Public License for more details.
Chris@909: #
Chris@0: # You should have received a copy of the GNU General Public License
Chris@0: # along with this program; if not, write to the Free Software
Chris@0: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@0: 
Chris@0: class ARCondition
Chris@0:   attr_reader :conditions
Chris@909: 
Chris@0:   def initialize(condition=nil)
Chris@0:     @conditions = ['1=1']
Chris@0:     add(condition) if condition
Chris@0:   end
Chris@909: 
Chris@0:   def add(condition)
Chris@0:     if condition.is_a?(Array)
Chris@0:       @conditions.first << " AND (#{condition.first})"
Chris@0:       @conditions += condition[1..-1]
Chris@0:     elsif condition.is_a?(String)
Chris@0:       @conditions.first << " AND (#{condition})"
Chris@0:     else
Chris@0:       raise "Unsupported #{condition.class} condition: #{condition}"
Chris@0:     end
Chris@0:     self
Chris@0:   end
Chris@0: 
Chris@0:   def <<(condition)
Chris@0:     add(condition)
Chris@0:   end
Chris@0: end