discourse/lib/validators/stripped_length_validator.rb

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# frozen_string_literal: true
class StrippedLengthValidator < ActiveModel::EachValidator
def self.validate(record, attribute, value, range)
if !value.nil?
value = get_sanitized_value(value)
record.errors.add attribute, (I18n.t('errors.messages.too_short', count: range.begin)) if value.length < range.begin
record.errors.add attribute, (I18n.t('errors.messages.too_long_validation', max: range.end, length: value.length)) if value.length > range.end
else
record.errors.add attribute, (I18n.t('errors.messages.blank'))
end
end
def validate_each(record, attribute, value)
# the `in` parameter might be a lambda when the range is dynamic
range = options[:in].lambda? ? options[:in].call : options[:in]
self.class.validate(record, attribute, value, range)
end
def self.get_sanitized_value(value)
value = value.dup
value.gsub!(/<!--(.*?)-->/, '') # strip HTML comments
value.gsub!(/:\w+(:\w+)?:/, "X") # replace emojis with a single character
value.gsub!(/\.{2,}/, '…') # replace multiple ... with …
value.gsub!(/\,{2,}/, ',') # replace multiple ,,, with ,
value.strip
end
end