spacegate-plugin 0.2.0-alpha.4

local freq_limit_key = KEYS[1];

local freq_key = string.format('%s:freq', freq_limit_key);
local freq_ts_key = string.format('%s:freq_ts', freq_limit_key);
if not(redis.call('exists', freq_key)) then
    redis.call('set', freq_key, 0);
end
local current_count = tonumber(redis.call('incr', freq_key));
local current_ts = tonumber(redis.call('time')[1]);
local freq_limit = tonumber(redis.call('get', freq_limit_key));
if freq_limit == nil then
    return 1;
end
if current_count == 1 then
    redis.call('set', freq_ts_key, current_ts);
end
if current_count > freq_limit then
    local last_refresh_time = tonumber(redis.call('get', freq_ts_key));
    if current_ts == nil or last_refresh_time == nil then
        return 1;
    end
    if last_refresh_time + 60 > current_ts then
        return 0;
    else
        redis.call('set', freq_key, '1')
        redis.call('set', freq_ts_key, current_ts);
    end
end
return 1;