ar_condition.rb

#-- encoding: UTF-8
#-- copyright
# ChiliProject is a project management system.
#
# Copyright (C) 2010-2011 the ChiliProject Team
#
# 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.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

class ARCondition
  attr_reader :conditions

  def initialize(condition=nil)
    @conditions = ['1=1']
    add(condition) if condition
  end

  def add(condition)
    if condition.is_a?(Array)
      @conditions.first << " AND (#{condition.first})"
      @conditions += condition[1..-1]
    elsif condition.is_a?(String)
      @conditions.first << " AND (#{condition})"
    else
      raise "Unsupported #{condition.class} condition: #{condition}"
    end
    self
  end

  def <<(condition)
    add(condition)
  end
end