openproject/lib/ar_condition.rb

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 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.
#
# 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.
#
# See COPYRIGHT and LICENSE files 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