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<?php |
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/** |
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* Pimf |
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* |
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* @copyright Copyright (c) Gjero Krsteski (http://krsteski.de) |
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* @license http://opensource.org/licenses/MIT MIT License |
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*/ |
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namespace Pimf\Cache\Storages; |
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/** |
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* @package Cache_Storages |
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* @author Gjero Krsteski <[email protected]> |
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*/ |
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abstract class Storage implements \ArrayAccess |
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{ |
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/** |
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* Determine if an item exists in the cache. |
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* |
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* @param $key |
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* |
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* @return bool |
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*/ |
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public function has($key) |
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{ |
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return ($this->get($key) !== null); |
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} |
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/** |
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* Determine if an item exists in the cache. |
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* |
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* Enables you to use: isset($storage[$key]) |
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* |
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* @param $offset |
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* |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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return $this->has($offset); |
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} |
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/** |
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* Get an item from the cache. |
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* |
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* <code> |
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* // Get an item from the cache storage |
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* $name = Cache::storage('name'); |
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* |
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* // Return a default value if the requested item isn't cached |
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* $name = Cache::get('name', 'Robin'); |
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* </code> |
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* |
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* @param $key |
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* @param null $default |
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* |
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* @return mixed|null |
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*/ |
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public function get($key, $default = null) |
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{ |
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return (!is_null($item = $this->retrieve($key))) ? $item : $default; |
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} |
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/** |
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* Get an item from the cache. |
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* |
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* Enables you to use: $storage[$key] |
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* |
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* <code> |
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* // Get an item from the cache storage |
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* $name = Cache::storage()['name']; |
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* </code> |
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* |
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* @param $offset |
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* |
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* @return mixed|null |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->get($offset); |
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} |
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/** |
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* Retrieve an item from the cache storage. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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abstract protected function retrieve($key); |
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/** |
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* Write an item to the cache for a given number of minutes. |
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* |
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* <code> |
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* // Put an item in the cache for 15 minutes |
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* Cache::put('name', 'Robin', 15); |
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* </code> |
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* |
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* @param string $key |
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* @param mixed $value |
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* @param int $minutes |
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* |
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* @return void |
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*/ |
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abstract public function put($key, $value, $minutes); |
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/** |
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* Write an item to the cache for indefinite-term storage. |
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* |
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* Enables you to use: $storage[$key] = $value; |
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* |
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* @param $key |
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* @param $value |
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*/ |
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public function offsetSet($key, $value) |
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{ |
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$this->forever($key, value); |
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} |
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/** |
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* Get an item from the cache, or cache and return the default value. |
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* |
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* <code> |
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* // Get an item from the cache, or cache a value for 15 minutes |
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* $name = Cache::remember('name', 'Robin', 15); |
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* |
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* // Use a closure for deferred execution |
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* $count = Cache::remember('count', function () { return User::count(); }, 15); |
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* </code> |
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* |
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* @param string $key |
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* @param mixed $default |
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* @param int $minutes |
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* @param string $function |
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* |
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* @return mixed |
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*/ |
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public function remember($key, $default, $minutes, $function = 'put') |
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{ |
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if (!is_null($item = $this->get($key, null))) { |
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return $item; |
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} |
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$this->$function($key, $default, $minutes); |
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return $default; |
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} |
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/** |
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* Write an item to the cache for indefinite-term storage. |
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* |
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* @param $key |
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* @param $value |
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* |
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* @return mixed Depends on implementation |
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*/ |
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abstract public function forever($key, $value); |
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/** |
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* Get an item from the cache, or cache the default value forever. |
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* |
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* @param string $key |
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* @param mixed $default |
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* |
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* @return mixed |
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*/ |
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public function sear($key, $default) |
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{ |
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return $this->remember($key, $default, null, 'forever'); |
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} |
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/** |
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* Delete an item from the cache. |
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* |
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* @param string $key |
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* |
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* @return boolean |
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*/ |
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abstract public function forget($key); |
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/** |
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* Delete an item from the cache. |
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* |
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* Enables you to use: unset($storage[$key]); |
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* |
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* @param string $key |
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*/ |
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public function offsetUnset($key) |
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{ |
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$this->forget($key); |
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} |
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/** |
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* Get the expiration time as a UNIX timestamp. |
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* |
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* @param int $minutes |
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* |
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* @return int |
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*/ |
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protected static function expiration($minutes) |
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{ |
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return time() + ($minutes * 60); |
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} |
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} |
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