discourse/lib/validators/regex_setting_validator.rb

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# frozen_string_literal: true
class RegexSettingValidator
LOREM = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam eget sem non elit tincidunt rhoncus.'
def initialize(opts = {})
@opts = opts
end
def valid_value?(val)
!val.present? || valid_regex?(val)
end
# Check that string is a valid regex, and that it doesn't match most of the lorem string.
def valid_regex?(val)
r = Regexp.new(val)
matches = r.match(LOREM)
matches.nil? || matches[0].length < (LOREM.length - 10)
rescue
false
end
def error_message
I18n.t('site_settings.errors.invalid_regex')
end
end