73 lines
1.8 KiB
Ruby
73 lines
1.8 KiB
Ruby
# frozen_string_literal: true
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class Antispam
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include Redisable
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ACCOUNT_AGE_EXEMPTION = 1.week.freeze
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class DummyStatus < SimpleDelegator
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def self.model_name
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Mention.model_name
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end
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def active_mentions
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# Don't use the scope but the in-memory array
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mentions.filter { |mention| !mention.silent? }
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end
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end
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class SilentlyDrop < StandardError
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attr_reader :status
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def initialize(status)
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super()
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status.created_at = Time.now.utc
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status.id = Mastodon::Snowflake.id_at(status.created_at)
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status.in_reply_to_account_id = status.thread&.account_id
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status.delete # Make sure this is not persisted
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@status = DummyStatus.new(status)
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end
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end
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def local_preflight_check!(status)
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return unless spammy_texts.any? { |spammy_text| status.text.include?(spammy_text) }
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return unless suspicious_reply_or_mention?(status)
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return unless status.account.created_at >= ACCOUNT_AGE_EXEMPTION.ago
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report_if_needed!(status.account)
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raise SilentlyDrop, status
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end
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private
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def spammy_texts
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redis.smembers('antispam:spammy_texts')
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end
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def suspicious_reply_or_mention?(status)
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parent = status.thread
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return true if parent.present? && !Follow.exists?(account_id: parent.account_id, target_account: status.account_id)
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account_ids = status.mentions.map(&:account_id).uniq
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!Follow.exists?(account_id: account_ids, target_account_id: status.account.id)
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end
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def report_if_needed!(account)
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return if system_reports.unresolved.exists?(target_account: account)
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system_reports.create!(
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category: :spam,
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comment: 'Account automatically reported for posting a banned URL',
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target_account: account
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)
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end
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def system_reports
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Account.representative.reports
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end
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end
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