donphan/app/validators/html_validator.rb

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# frozen_string_literal: true
class HtmlValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
return if value.blank?
record.errors.add(attribute, I18n.t('html_validator.invalid_markup')) unless valid_html?(value)
end
private
def valid_html?(str)
Nokogiri::HTML.fragment(str).to_s == str
end
end