* @copyright 2016 - 2017 Timothy J. Warren * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version 1.0.1 * @link https://git.timshomepage.net/timw4mail/banker */ namespace Aviat\Banker\Driver; /** * Cache backend for use without a cache server. Only does transient * in-memory caching */ class NullDriver extends AbstractDriver { /** * In memory store * * @var array */ protected $store = []; /** * NullDriver constructor. * * @param array $config * @param array $options */ public function __construct(array $config = [], array $options = []) { $this->store = []; } /** * Clean up nothing */ public function __destruct() { //noop } /** * See if a key currently exists in the cache * * @param string $key * @return bool */ public function exists(string $key): bool { return array_key_exists($key, $this->store); } /** * Get the value for the selected cache key * * @param string $key * @return mixed */ public function get(string $key) { return ($this->exists($key)) ? $this->store[$key] : NULL; } /** * Retrieve a set of values by their cache key * * @param string[] $keys * @return array */ public function getMultiple(array $keys = []): array { $output = []; foreach($keys as $key) { $output[$key] = $this->get($key); } return $output; } /** * Set a cached value * * @param string $key * @param mixed $value * @param int $expires * @return DriverInterface */ public function set(string $key, $value, int $expires = 0): DriverInterface { $this->store[$key] = $value; return $this; } /** * Remove an item from the cache * * @param string $key * @return boolean */ public function delete(string $key): bool { unset($this->store[$key]); return ( ! array_key_exists($key, $this->store)); } /** * Remove multiple items from the cache * * @param string[] $keys * @return boolean */ public function deleteMultiple(array $keys = []): bool { $res = TRUE; foreach($keys as $key) { $res = $res && $this->delete($key); } return $res; } /** * Empty the cache * * @return boolean */ public function flush(): bool { $this->store = []; return TRUE; } /** * Set the specified key to expire at the given time * * @param string $key * @param int $expires * @return boolean */ public function expiresAt(string $key, int $expires): bool { //noop return TRUE; } }