orphaned-ads.lua

local last_balanced     = "lastBalanced"
local orphans_key       = "orphanAds"
local last_balanced_ttl = 60 * 20

for i = 1, #ARGV do
  local ad_id   = ARGV[i]
  local ad_key  = last_balanced .. ":" .. ad_id

  if redis.call("EXISTS", ad_key) ~= 1 then
    redis.call("SADD", orphans_key, ad_id)
    redis.call("SETEX", ad_key, last_balanced_ttl, 1)
  end
end

return {ok="OK"}