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improve spam logic in post livecomments #21

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merged 1 commit into from Nov 25, 2023
Merged

improve spam logic in post livecomments #21

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19 changes: 5 additions & 14 deletions webapp/ruby/app.rb
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Expand Up @@ -598,20 +598,11 @@ def batch_fill_user_response(tx, user_models)
end

# スパム判定
tx.xquery('SELECT id, user_id, livestream_id, word FROM ng_words WHERE user_id = ? AND livestream_id = ?', livestream_model.fetch(:user_id), livestream_model.fetch(:id)).each do |ng_word|
query = <<~SQL
SELECT COUNT(*)
FROM
(SELECT ? AS text) AS texts
INNER JOIN
(SELECT CONCAT('%', ?, '%') AS pattern) AS patterns
ON texts.text LIKE patterns.pattern
SQL
hit_spam = tx.xquery(query, req.comment, ng_word.fetch(:word), as: :array).first[0]
logger.info("[hit_spam=#{hit_spam}] comment = #{req.comment}")
if hit_spam >= 1
raise HttpError.new(400, 'このコメントがスパム判定されました')
end
ng_words = tx.xquery('SELECT word FROM ng_words WHERE user_id = ? AND livestream_id = ?', livestream_model.fetch(:user_id), livestream_model.fetch(:id))
hit_spam = ng_words.count { |ng_word| req.comment.include?(ng_word.fetch(:word)) }
logger.info("[hit_spam=#{hit_spam}] comment = #{req.comment}")
if hit_spam >= 1
raise HttpError.new(400, 'このコメントがスパム判定されました')
end

now = Time.now.to_i
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