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module FilterHelper
include Redisable
def phrase_filtered?(status, receiver_id, context)
if redis.sismember("filtered_statuses:#{receiver_id}", status.id)
return !(redis.hexists("custom_cw:#{receiver_id}", status.id) || redis.hexists("custom_cw:#{receiver_id}", "c#{status.conversation_id}"))
end
filters = cached_filters(receiver_id)
filters.select! { |filter| filter.context.include?(context.to_s) && !filter.expired? }
if status.media_attachments.any?
filters.delete_if { |filter| filter.exclude_media }
else
filters.delete_if { |filter| filter.media_only }
end
return false if filters.empty?
status = status.reblog if status.reblog?
status_text = Formatter.instance.plaintext(status)
spoiler_text = status.spoiler_text
tags = status.tags.pluck(:name).join("\n")
filters.each do |filter|
if filter.whole_word
sb = filter.phrase =~ /\A[[:word:]]/ ? '\b' : ''
eb = filter.phrase =~ /[[:word:]]\z/ ? '\b' : ''
regex = /(?mix:#{sb}#{Regexp.escape(filter.phrase)}#{eb})/
else
regex = /#{Regexp.escape(filter.phrase)}/i
end
matched = false
matched = true unless regex.match(status_text).nil?
matched = true unless spoiler_text.blank? || regex.match(spoiler_text).nil?
matched = true unless tags.empty? || regex.match(tags).nil?
if matched
filter_thread(receiver_id, status.conversation_id) if filter.thread && filter.custom_cw.blank?
unless filter.custom_cw.blank?
cw = if filter.override_cw || status.spoiler_text.blank?
filter.custom_cw
else
"[#{filter.custom_cw}] #{status.spoiler_text}".rstrip
end
if filter.thread
redis.hset("custom_cw:#{receiver_id}", "c#{status.conversation_id}", cw)
else
redis.hset("custom_cw:#{receiver_id}", status.id, cw)
end
end
redis.sadd("filtered_statuses:#{receiver_id}", status.id)
return filter.custom_cw.blank?
end
end
false
end
def filter_thread(account_id, conversation_id)
return if Status.where(account_id: account_id, conversation_id: conversation_id).exists?
redis.sadd("filtered_threads:#{account_id}", conversation_id)
end
def filtering_thread?(account_id, conversation_id)
redis.sismember("filtered_threads:#{account_id}", conversation_id)
end
def cached_filters(account_id)
Rails.cache.fetch("filters:#{account_id}") { CustomFilter.where(account_id: account_id).to_a }.to_a
end
end
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