recurring tasks in relyq/qb lua scripts

get_recurring_to_exec.lua

-- KEYS:[zset], ARGV:[now]
-- the sorted set contains key / next pairs, where next is the next execution time
-- Find all upcoming tasks
-- Get their intervals and requeue them

local refs = redis.call("zrangebyscore", KEYS[1], 0, ARGV[1])
for i,ref in pairs(refs) do
  tref, int = string.match(ref, "([^|]*)|(\d+)")
  redis.call("zincrby", KEYS[1], int, tref)
  refs[i] = tref
end
return refs

push_recurring.lua

-- KEYS:[zset], ARGV:[ref, now, interval]
-- the sorted set contains key / next pairs, where next is the next execution time

local ref, now, interval = unpack(ARGV)
redis.call("zadd", KEYS[1], now + interval, ref .. "|" .. interval)