EntityCache.php

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<?php

namespace Elgg\Cache;

class EntityCache {

    const MAX_SIZE = 256;

    protected $cache;

    protected $size = 0;

    public function __construct(BaseCache $cache) {
        $this->cache = $cache;
    }

    public function load(int $guid): ?\ElggEntity {
        return $this->cache->load($guid);
    }

    public function save(\ElggEntity $entity): void {
        if (!$entity->guid || !$entity->isCacheable()) {
            return;
        }

        if ($this->size > self::MAX_SIZE) {
            // Don't store too many or we'll have memory problems
            return;
        }

        $this->cache->save($entity->guid, $entity);
        $this->size++;
    }

    public function delete(int $guid): void {
        if (!$guid) {
            return;
        }

        $entity = $this->cache->load($guid);
        if (!$entity instanceof \ElggEntity) {
            return;
        }

        $this->cache->delete($guid);
        $this->size--;
    }

    public function clear(): void {
        $this->cache->clear();
        $this->size = 0;
    }
}