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<?php |
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namespace Helix\Asana\Api; |
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use Closure; |
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use Helix\Asana\Api; |
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use Helix\Asana\Base\AbstractEntity; |
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use Helix\Asana\Base\Data; |
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/** |
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* Pools entities in runtime memory. |
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*/ |
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class Cache { |
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/** |
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* `[ gid => entity ]` |
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* |
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* @var AbstractEntity[] |
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*/ |
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protected $entities = []; |
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/** |
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* `[ key => gid ]` |
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* |
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* @var string[]; |
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*/ |
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protected $gids = []; |
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/** |
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* Caches the entity using all available keys. |
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* |
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* If the entity has no GID, or has diffs, does nothing. |
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* |
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* @param AbstractEntity $entity |
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* @return bool Success |
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*/ |
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public function add (AbstractEntity $entity): bool { |
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if ($gid = $entity->getGid() and !$entity->isDiff()) { |
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$this->entities[$gid] = $entity; |
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$this->addKeys($gid, $entity->getCacheKeys()); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Adds keys for a GID. |
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* |
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* @param string $gid |
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* @param string[] $keys |
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*/ |
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protected function addKeys (string $gid, array $keys): void { |
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$this->gids += array_fill_keys($keys, $gid); |
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} |
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/** |
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* Fetches an entity from the pool, creating it via factory if needed. |
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* |
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* If the factory returns an entity with a GID that is already cached, |
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* the cached version is used instead, and the given key is added for it. |
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* |
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* @param string $key |
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* @param Api|Data $caller |
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* @param Closure $factory `fn($caller): null|AbstractEntity` |
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* @return null|mixed|AbstractEntity |
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*/ |
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public function get (string $key, $caller, Closure $factory) { |
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// POOL HIT |
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if ($gid = $this->gids[$key] ?? null) { |
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return $this->entities[$gid]; |
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} |
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// POOL MISS |
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$entity = $factory($caller); |
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if ($entity instanceof AbstractEntity) { |
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$gid = $entity->getGid(); |
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// if the entity is already pooled, it means the key is new (dynamic/nonstandard). |
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// renew all known keys and return the existing entity. |
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if (isset($this->entities[$gid])) { |
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$this->addKeys($gid, [$key]); |
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$this->addKeys($gid, $entity->getCacheKeys()); |
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return $this->entities[$gid]; |
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} |
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// pool the entity and return it |
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$this->add($entity); |
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return $entity; |
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} |
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return null; |
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} |
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/** |
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* Removes the entity and its associated keys from cache. |
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* |
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* @param AbstractEntity $entity |
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*/ |
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public function remove (AbstractEntity $entity): void { |
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$gid = $entity->getGid(); |
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unset($this->entities[$gid]); |
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foreach ($entity->getCacheKeys() as $key) { |
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unset($this->gids[$key]); |
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} |
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} |
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} |
hfw /
asana
