AlexWayfer/formalism-r18n_errors

# frozen_string_literal: true

require 'formalism'

require_relative 'r18n_errors/version'
require_relative 'r18n_errors/errors'

module Formalism
    ## Main module which should be included into base form
    module R18nErrors
        def initialize(*)
            ## `@errors_key` should be set in using form
            @errors = Errors.new

            super
        end

        protected

        attr_accessor :errors_key
        attr_reader :errors

        private

        def fill_nested_form(name, options)
            return unless (form = super)

            form.errors_key = options.fetch(:errors_key, name)

            form
        end

        def add_error(*args, **kwargs)
            raise '`@errors_key` is required' unless errors_key

            errors.add errors_key, *args, **kwargs
        end

        def merge_errors_of_nested_form(name, nested_form)
            add_error name, nested_errors: nested_form.errors
        end

        def nested_form_to_params(_name_of_nested_form, nested_form)
            return super if nested_form.errors_key

            nested_form.to_params
        end
    end
end