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mastodon
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mastodon/app/validators/note_length_validator.rb

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# frozen_string_literal: true
class NoteLengthValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
record.errors.add(attribute, I18n.t('statuses.over_character_limit', max: options[:maximum])) if too_long?(value)
end
private
def too_long?(value)
countable_text(value).mb_chars.grapheme_length > options[:maximum]
end
def countable_text(value)
return '' if value.nil?
value.dup.tap do |new_text|
new_text.gsub!(FetchLinkCardService::URL_PATTERN, 'x' * 23)
new_text.gsub!(Account::MENTION_RE, '@\2')
end
end
end