Calender event concern

calendar_title.rb

# frozen_string_literal: true

class CalendarTitle < ApplicationRecord
  include EventTitle

  # search
  include PgSearch
  pg_search_scope(
    :search,
    against: %i[name],
    using: { tsearch: { prefix: true } }
  )

  # relations
  has_many :calendar_title_types, foreign_key: :title_id, inverse_of: :title, dependent: :destroy
  has_many :types, through: :calendar_title_types
  has_many :calendar_events, dependent: :destroy

  # validations
  validates :name, presence: true, uniqueness: true
end

event_title.rb

# frozen_string_literal: true

module EventTitle
  extend ActiveSupport::Concern

  Datum = Struct.new :name, :title, keyword_init: true

  class Title
    delegate :name, :title, to: :@datum

    attr_reader :path, :code

    def initialize(path, **datum)
      @datum = Datum.new(**datum)
      @path  = path
      @code  = encode
    end

    private

    PATH_SEPARATOR = '_'

    def encode
      [*path, name].map(&:to_s).join PATH_SEPARATOR
    end
  end

  class_methods do
    def registery
      @registery ||= EventTitle.registery_from_yaml "#{Rails.root}/db/static_data/event_titles.yml"
    end

    def registery_from_yaml(yaml_file)
      registery = ActiveSupport::OrderedOptions.new

      YAML.load_file(yaml_file).each do |category, data|
        data.each do |datum|
          type = Title.new([category], **datum.deep_symbolize_keys)
          registery[type.code] = type
        end
      end

      registery
    end

    def find_by_event_code(code)
      find_by(name: registery[code].title)
    end
  end
end