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<?php |
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/** |
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* Scabbia2 Services Component |
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* https://github.com/eserozvataf/scabbia2 |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @link https://github.com/eserozvataf/scabbia2-services for the canonical source repository |
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* @copyright 2010-2016 Eser Ozvataf. (http://eser.ozvataf.com/) |
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* @license http://www.apache.org/licenses/LICENSE-2.0 - Apache License, Version 2.0 |
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*/ |
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namespace Scabbia\Services; |
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use ArrayAccess; |
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use InvalidArgumentException; |
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/** |
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* Service container and registry |
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* |
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* @package Scabbia\Services |
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* @author Eser Ozvataf <[email protected]> |
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* @since 2.0.0 |
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*/ |
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class Services implements ArrayAccess |
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{ |
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/** @type Services $default default service container */ |
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public static $default = null; |
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/** @type array $services shared service objects */ |
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protected $services = []; |
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/** |
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* Returns the instance of default service container |
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* |
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* @return Services default service container |
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*/ |
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public static function getCurrent() |
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{ |
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if (static::$default === null) { |
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static::$default = new Services(); |
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} |
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return static::$default; |
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} |
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/** |
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* Sets a service definition |
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* |
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* @param string $uId name of the service |
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* @param mixed $uValue any value |
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* |
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* @return void |
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*/ |
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public function offsetSet($uId, $uValue) |
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{ |
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$this->services[$uId] = [$uValue, true]; |
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} |
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/** |
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* Sets a factory function in order to generate service instances |
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* |
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* @param string $uName name of the service |
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* @param callable $uCallback callback generates service instances |
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* |
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* @return void |
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*/ |
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public function setFactory($uName, $uCallback) |
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{ |
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$this->services[$uName] = [$uCallback, false]; |
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} |
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/** |
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* Sets a factory function in order to generate service instances |
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* |
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* @param string $uName name of the service |
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* @param callable $uCallback callback generates service instances |
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* |
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* @throws InvalidArgumentException if the service is not defined |
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* @return void |
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*/ |
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public function decorate($uName, $uCallback) |
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{ |
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if (!isset($this->services[$uName])) { |
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throw new InvalidArgumentException(sprintf("Service '%s' is not defined.", $uName)); |
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} |
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$tService = $this->services[$uName]; |
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$tClosure = function () use ($tService, $uCallback) { |
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// it's a shared instance, not a factory. |
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if ($tService[1] === true) { |
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$tValue = $tService[0]; |
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} else { |
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$tValue = call_user_func($tService[0]); |
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} |
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return call_user_func($uCallback, $tValue); |
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}; |
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$this->services[$uName] = [$tClosure, false]; |
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} |
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/** |
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* Gets the service instance or invokes factory callback if the service is defined |
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* |
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* @param string $uId name of the service |
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* |
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* @throws InvalidArgumentException if the service is not defined |
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* @return mixed the service instance |
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*/ |
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public function offsetGet($uId) |
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{ |
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if (!isset($this->services[$uId])) { |
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throw new InvalidArgumentException(sprintf("Service '%s' is not defined.", $uId)); |
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} |
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$tService = $this->services[$uId]; |
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// it's a shared instance, not a factory. |
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if ($tService[1] === true) { |
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return $tService[0]; |
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} |
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return call_user_func($tService[0]); |
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} |
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/** |
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* Checks if service is defined |
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* |
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* @param string $uId name of the service |
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* |
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* @return bool |
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*/ |
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public function offsetExists($uId) |
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{ |
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return isset($this->services[$uId]); |
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} |
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/** |
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* Unsets a service |
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* |
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* @param string $uId name of the service |
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* |
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* @return void |
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*/ |
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public function offsetUnset($uId) |
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{ |
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unset($this->services[$uId]); |
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} |
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} |
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eserozvataf /
scabbia2-services
