catstodon/app/lib/delivery_failure_tracker.rb

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# frozen_string_literal: true
class DeliveryFailureTracker
FAILURE_DAYS_THRESHOLD = 7
def initialize(inbox_url)
@inbox_url = inbox_url
end
def track_failure!
Redis.current.sadd(exhausted_deliveries_key, today)
Redis.current.sadd('unavailable_inboxes', @inbox_url) if reached_failure_threshold?
end
def track_success!
Redis.current.del(exhausted_deliveries_key)
Redis.current.srem('unavailable_inboxes', @inbox_url)
end
def days
Redis.current.scard(exhausted_deliveries_key) || 0
end
class << self
def filter(arr)
arr.reject(&method(:unavailable?))
end
def unavailable?(url)
Redis.current.sismember('unavailable_inboxes', url)
end
def available?(url)
!unavailable?(url)
end
def track_inverse_success!(from_account)
new(from_account.inbox_url).track_success! if from_account.inbox_url.present?
new(from_account.shared_inbox_url).track_success! if from_account.shared_inbox_url.present?
end
end
private
def exhausted_deliveries_key
"exhausted_deliveries:#{@inbox_url}"
end
def today
Time.now.utc.strftime('%Y%m%d')
end
def reached_failure_threshold?
days >= FAILURE_DAYS_THRESHOLD
end
end