129 lines
4.3 KiB
Ruby
129 lines
4.3 KiB
Ruby
module Treehouse
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module Automod
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COMMENT_HEADER = <<~EOS
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Tracking Report - automatically created by TreehouseAutomod
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EOS
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WARNING_TEXT = <<~EOS
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Tracking Infraction - automatically created by TreehouseAutomod
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EOS
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def self.suspend_with_tracking_report!(account, status_ids: [], explanation: "")
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account.save!
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self.file_tracking_report!(account, status_ids: status_ids) unless account.suspension_origin == "local"
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account.suspend! unless account.suspension_origin == "local"
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end
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def self.file_tracking_report!(account, status_ids: [], explanation: "")
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reporter = self.staff_account
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return if reporter.nil?
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report = ReportService.new.call(
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reporter,
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account,
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{
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status_ids: status_ids,
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comment: explanation.blank? ? COMMENT_HEADER : "#{COMMENT_HEADER}\n\n#{EXPLANATION}",
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th_skip_notify_staff: true,
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th_skip_forward: true,
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}
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)
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report.spam!
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report.assign_to_self!(reporter)
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account_action = Admin::AccountAction.new(
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type: "suspend",
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report_id: report.id,
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target_account: account,
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current_account: reporter,
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send_email_notification: false,
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text: WARNING_TEXT,
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)
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account_action.save!
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report.resolve!(reporter)
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end
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def self.staff_account
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username = Rails.configuration.x.th_automod.automod_account_username
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Account.find_local(username) unless username.blank?
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end
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def self.process_status!(status)
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ActivityPubActivityCreateExt.process!(status)
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end
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def self.process_account!(account)
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AccountServiceExt.process!(account)
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end
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module ActivityPubActivityCreateExt
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EXPLANATION = <<~EOS
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This account was automatically suspended by TreehouseAutomod, an unsupported feature.
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Currently, the account-only heuristic should only automatically suspend accounts with one specific username and display name.
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If this action is unexpected, please unset TH_MENTION_SPAM_HEURISTIC_AUTO_LIMIT_ACTIVE.
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EOS
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# check if the status should be considered spam
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# @return true if the status was reported and the account was infracted
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def self.process!(status)
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return false unless Rails.configuration.x.th_automod.mention_spam_heuristic_auto_limit_active
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account = status.account
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minimal_effort = account.note.blank? && account.avatar_remote_url.blank? && account.header_remote_url.blank?
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return false if (account.local? ||
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account.local_followers_account > 0 ||
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!minimal_effort)
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# minimal effort account, check mentions and account-known age
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status.mentions.size > 8 && account.created_at > (Time.now - 1.day)
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end
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end
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module AccountServiceExt
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# hardcoded for now
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# md5 because they don't deserve more mentions
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HEURISTIC_NAMES = {
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"0116a9deace3289b7092e945ef5ca0a5" => Set["57d3d0b932cc9cd01be6b2f4e82c1a4a"],
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}
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# probably mathematically impossible to collide, but just in case...
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HEURISTIC_MAX_LEN = 16
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EXPLANATION = <<~EOS
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This account was automatically suspended by TreehouseAutomod, an unsupported feature.
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Currently, the account-only heuristic should only automatically suspend accounts with one specific username and display name.
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If this action is unexpected, please unset TH_HEURISTIC_AUTO_SUSPEND.
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EOS
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# @return true if the account was infracted
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def self.process!(account)
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return false unless heuristic_auto_suspend?(account)
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Automod.suspend_with_tracking_report!(account, explanation: EXPLANATION) unless account.suspension_origin == "local"
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true
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end
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def self.matches_evil_hash?(account)
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username_md5 = Digest::MD5.hexdigest(account.username)
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display_name_md5 = Digest::MD5.hexdigest(account.display_name)
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HEURISTIC_NAMES[username_md5].include?(display_name_md5)
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end
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def self.heuristic_auto_suspend?(account)
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return false unless Rails.configuration.x.th_automod.account_service_heuristic_auto_suspend_active
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return unless account.username.length < HEURISTIC_MAX_LEN && account.display_name.length < HEURISTIC_MAX_LEN
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self.matches_evil_hash?(account)
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end
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end
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end
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end
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