OpenProject is the leading open source project management software.
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openproject/app/models/projects/hierarchy.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.
#++
module Projects::Hierarchy
extend ActiveSupport::Concern
included do
acts_as_nested_set order_column: :lft, dependent: :destroy
# Keep the siblings sorted after naming changes to ensure lft sort includes name sorting
before_save :remember_reorder
after_save :reorder_by_name, if: -> { @reorder_nested_set }
def reorder_by_name
@reorder_nested_set = nil
return unless siblings.any?
left_neighbor = left_neighbor_by_name_order
if left_neighbor
move_to_right_of(left_neighbor)
elsif self != self_and_siblings.first
move_to_left_of(self_and_siblings.first)
end
end
##
# Find the sibling for which the current project's name is smaller.
# Since we sort ascending, start from the back.
# Returns:
# - nil, if the current project does not have a left neighbor (should be added as first)
# - the project sibling for which the project should be appended to the right to
def left_neighbor_by_name_order
siblings
.reverse_each
.detect { |project| project.name.casecmp(name) == -1 }
end
# We need to remember if we want to reorder as nested_set
# will perform another save directly in +after_save+ if a parent was set
# and that clear new_record? as well as previous_new_record?
def remember_reorder
@reorder_nested_set = new_record? || name_changed?
end
end
end