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Current File : C:/inetpub/vhost/redmine.gdtvietnam.com/plugins/redmine_people/app/models/department_nested_set.rb

# This file is a part of Redmine People (redmine_people) plugin,
# humanr resources management plugin for Redmine
#
# Copyright (C) 2011-2024 RedmineUP
# http://www.redmineup.com/
#
# redmine_people 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 3 of the License, or
# (at your option) any later version.
#
# redmine_people 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 redmine_people.  If not, see <http://www.gnu.org/licenses/>.

module DepartmentNestedSet
  def self.included(base)
    base.class_eval do
      belongs_to :parent, :class_name => name

      before_create :add_to_nested_set
      before_update :move_in_nested_set, :if => lambda { |department| department.parent_id_changed? || department.name_changed? }
      before_destroy :destroy_children
    end

    base.send :include, Redmine::NestedSet::Traversing
  end

  private

  def target_lft
    siblings_rgt = self.class.where(:parent_id => parent_id).where('name < ?', name).maximum(:rgt)
    if siblings_rgt
      siblings_rgt + 1
    elsif parent_id
      parent_lft = self.class.where(:id => parent_id).pluck(:lft).first
      raise "Department id=#{id} with parent_id=#{parent_id}: parent missing or without 'lft' value" unless parent_lft
      parent_lft + 1
    else
      1
    end
  end

  def add_to_nested_set(lock = true)
    lock_nested_set if lock
    self.lft = target_lft
    self.rgt = lft + 1
    self.class.where('lft >= ? OR rgt >= ?', lft, lft).update_all(['lft = CASE WHEN lft >= :lft THEN lft + 2 ELSE lft END, ' +
                                                                   'rgt = CASE WHEN rgt >= :lft THEN rgt + 2 ELSE rgt END',
                                                                   { :lft => lft }])
  end

  def move_in_nested_set
    lock_nested_set
    reload_nested_set_values
    a = lft
    b = rgt
    c = target_lft
    unless c == a
      if c > a
        # Moving to the right
        d = c - (b - a + 1)
        scope = self.class.where(['lft BETWEEN :a AND :c - 1 OR rgt BETWEEN :a AND :c - 1', { :a => a, :c => c }])
        scope.update_all([
          'lft = CASE WHEN lft BETWEEN :a AND :b THEN lft + (:d - :a) WHEN lft BETWEEN :b + 1 AND :c - 1 THEN lft - (:b - :a + 1) ELSE lft END, ' +
          'rgt = CASE WHEN rgt BETWEEN :a AND :b THEN rgt + (:d - :a) WHEN rgt BETWEEN :b + 1 AND :c - 1 THEN rgt - (:b - :a + 1) ELSE rgt END',
          { :a => a, :b => b, :c => c, :d => d }
        ])
      elsif c < a
        # Moving to the left
        scope = self.class.where('lft BETWEEN :c AND :b OR rgt BETWEEN :c AND :b', { :a => a, :b => b, :c => c })
        scope.update_all([
          'lft = CASE WHEN lft BETWEEN :a AND :b THEN lft - (:a - :c) WHEN lft BETWEEN :c AND :a - 1 THEN lft + (:b - :a + 1) ELSE lft END, ' +
          'rgt = CASE WHEN rgt BETWEEN :a AND :b THEN rgt - (:a - :c) WHEN rgt BETWEEN :c AND :a - 1 THEN rgt + (:b - :a + 1) ELSE rgt END',
          { :a => a, :b => b, :c => c, :d => d }
        ])
      end
      reload_nested_set_values
    end
  end

  def destroy_children
    unless @without_nested_set_update
      lock_nested_set
      reload_nested_set_values
    end
    children.each { |c| c.send :destroy_without_nested_set_update }
    unless @without_nested_set_update
      self.class.where('lft > ? OR rgt > ?', lft, lft).update_all([
        'lft = CASE WHEN lft > :lft THEN lft - :shift ELSE lft END, ' +
        'rgt = CASE WHEN rgt > :lft THEN rgt - :shift ELSE rgt END',
        { :lft => lft, :shift => rgt - lft + 1 }
      ])
    end
  end

  def destroy_without_nested_set_update
    @without_nested_set_update = true
    destroy
  end

  def lock_nested_set
    lock = true
    if self.class.connection.adapter_name =~ /sqlserver/i
      lock = 'WITH (ROWLOCK HOLDLOCK UPDLOCK)'
    end
    self.class.order(:id).lock(lock).ids
  end

  def reload_nested_set_values
    self.lft, self.rgt = Department.where(:id => id).pluck(:lft, :rgt).first
  end

  def nested_set_scope
    self.class.order(:lft)
  end

  def same_nested_set_scope?(department)
    parent_id == department.id
  end
end