CacheSwr.php

<?php

Repository::macro('swr', function (string $key, DateInterval|DateTimeInterface|int $tts, DateInterval|DateTimeInterface|int $ttl, Closure $callback): mixed {
            /** @var Repository $this */
            if ($this->getSeconds($tts) >= $this->getSeconds($ttl)) {
                throw new UnexpectedValueException('The time-to-stale value must be less than the time-to-live value.');
            }

            $ttsKey = "{$key}:tts";
            $revalidatingKey = "{$key}:revalidating";

            // Re-implement the logic of the `remember()` method to avoid the overhead of
            // calling `has()` twice on the same key, as well as the need to `forget()`
            // the key before the value is ready to be set in cache.
            $remember = fn () => tap($callback(), function (mixed $value) use ($key, $ttl, $ttsKey, $tts) {
                /** @var Repository $this */
                $this->put($key, $value, value($ttl, $value));
                $this->put($ttsKey, true, value($tts, true));
            });

            // Set the value in cache if key doesn't exist.
            if ($this->missing($key)) {
                return $remember();
            }

            app()->terminating(function () use ($ttsKey, $revalidatingKey, $remember) {
                /** @var Repository $this */
                if ($this->has($ttsKey) || $this->has($revalidatingKey)) {
                    return;
                }

                $this->put($revalidatingKey, true);

                rescue($remember);
            });

            return $this->get($key);
        });