module HasHideAncestry

# File lib/hide_ancestry/has_hide_ancestry.rb, line 5
def has_hide_ancestry options = {}
  # Check options
  raise HideAncestryExeption.new(
    'Options for has_hide_ancestry must be in a hash'
    ) unless options.is_a? Hash

  options.each do |key, value|
    unless [:use_column].include? key
      raise HideAncestryExeption.new(
        "Unknown option for has_hide_ancestry: " \
        "#{key.inspect} => #{value.inspect}"
        )
    end
  end

  cattr_accessor :hidden_column
  self.hidden_column = options[:use_column] || :hidden_status

  # Include validation errors to the model
  include HideAncestry::Validators

  # Include instance methods to the model
  include HideAncestry::InstanceMethods

  serialize :old_child_ids, Array

  scope :hidden,   -> { where hidden_column => true }
  scope :unhidden, -> { where.not(hidden_column => true) }
  scope :hidden_nodes,  -> (ids) { hidden.where id: ids }
  scope :hidden_childs, -> (some_id) { hidden.where old_parent_id: some_id }

  # Persist record changes for correct work of #previous_changes
  before_save do |record|
    @record_changes = record.changes
  end

  after_save do |record|
    HideAncestry::ModelManage::CustomAncestryUpdater.call(record)
  end

  # hidden node can not change ancestry
  validate :can_not_has_parent_or_children, if: -> { hidden? }
end