zammad/lib/sequencer/unit/import/common/model/mixin/without_callback.rb

# Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/

module Sequencer::Unit::Import::Common::Model::Mixin::WithoutCallback
  module ClassMethods

    def without_callback(*callback)
      @callbacks ||= []
      @callbacks.push(callback)
    end

    def callbacks
      Array(@callbacks)
    end
  end

  def self.prepended(base)
    base.extend(ClassMethods)
    base.uses :model_class
  end

  def process
    # keep the super call as the last or only entry point
    entry_point = proc do
      super
    end

    # loop over all registerd callbacks
    self.class.callbacks.each do |callback|

      # create a duplicate of the previous entry point
      # to avoid an endless loop
      previous_entry_point = entry_point.dup

      # replace the previous entry point with a wrapped version
      # which skips the current callback
      entry_point = proc do
        model_class.without_callback(*callback, &previous_entry_point)
      end
    end

    # start at the last registerd entry point
    # and go deep till we reach our super call
    entry_point.call
  end
end