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# frozen_string_literal: true
class DeliveryFailureTracker
FAILURE_DAYS_THRESHOLD = 7
def initialize(url_or_host)
@host = url_or_host.start_with?('https://') || url_or_host.start_with?('http://') ? Addressable::URI.parse(url_or_host).normalized_host : url_or_host
end
def track_failure!
Redis.current.sadd(exhausted_deliveries_key, today)
UnavailableDomain.create(domain: @host) if reached_failure_threshold?
end
def track_success!
Redis.current.del(exhausted_deliveries_key)
UnavailableDomain.find_by(domain: @host)&.destroy
end
def clear_failures!
Redis.current.del(exhausted_deliveries_key)
end
def days
Redis.current.scard(exhausted_deliveries_key) || 0
end
def available?
!UnavailableDomain.where(domain: @host).exists?
end
def exhausted_deliveries_days
@exhausted_deliveries_days ||= Redis.current.smembers(exhausted_deliveries_key).sort.map { |date| Date.new(date.slice(0, 4).to_i, date.slice(4, 2).to_i, date.slice(6, 2).to_i) }
end
alias reset! track_success!
class << self
def without_unavailable(urls)
unavailable_domains_map = Rails.cache.fetch('unavailable_domains') { UnavailableDomain.pluck(:domain).index_with(true) }
urls.reject do |url|
host = Addressable::URI.parse(url).normalized_host
unavailable_domains_map[host]
end
end
def available?(url)
new(url).available?
end
def reset!(url)
new(url).reset!
end
def warning_domains
domains = Redis.current.keys(exhausted_deliveries_key_by('*')).map do |key|
key.delete_prefix(exhausted_deliveries_key_by(''))
end
domains - UnavailableDomain.all.pluck(:domain)
end
def warning_domains_map
warning_domains.index_with { |domain| Redis.current.scard(exhausted_deliveries_key_by(domain)) }
end
private
def exhausted_deliveries_key_by(host)
"exhausted_deliveries:#{host}"
end
end
private
def exhausted_deliveries_key
"exhausted_deliveries:#{@host}"
end
def today
Time.now.utc.strftime('%Y%m%d')
end
def reached_failure_threshold?
days >= FAILURE_DAYS_THRESHOLD
end
end
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