OpenProject is the leading open source project management software.
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openproject/app/services/authorization/query_transformations_order.rb

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#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2022 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 Authorization::QueryTransformationsOrder
def initialize
self.array = []
end
delegate :<<, :map, to: :array
def full_order
partial_orders = transformation_partial_orders
merge_transformation_partial_orders(partial_orders)
end
private
attr_accessor :array
def transformation_partial_orders
map do |transformation|
transformation.after + [transformation.name] + transformation.before
end
end
def merge_transformation_partial_orders(partial_orders)
desired_order = []
until partial_orders.empty?
order = partial_orders.shift
shift_first_if_its_turn(order, partial_orders) do |first|
desired_order << first
end
partial_orders.push(order) unless order.empty?
end
desired_order
end
def shift_first_if_its_turn(order, partial_orders)
@rejected ||= []
if first_not_included_or_first_everywhere(order, partial_orders)
partial_orders.select { |o| o[0] == order[0] }.each(&:shift)
@rejected.clear
yield order.shift
else
raise "Cannot sort #{order} into the list of transformations" if @rejected.include?(order)
@rejected << order
end
end
def first_not_included_or_first_everywhere(order, partial_orders)
partial_orders.all? { |o| !o.include?(order[0]) || o[0] == order[0] }
end
end