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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Shared |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Shared\Shareable; |
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use Phossa2\Shared\Message\Message; |
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use Phossa2\Shared\Exception\RuntimeException; |
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/** |
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* Implementation of ShareableInterface |
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* |
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* @package Phossa2\Shared |
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* @author Hong Zhang <[email protected]> |
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* @see ShareableInterface |
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* @version 2.0.10 |
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* @since 2.0.10 added |
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*/ |
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trait ShareableTrait |
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{ |
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/** |
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* Shareables' pool |
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* |
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* @var ShareableInstance[] |
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* @access private |
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* @staticvar |
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*/ |
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private static $shareables = []; |
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/** |
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* Is this shared instance, store scope here |
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* |
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* @var string |
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* @access protected |
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*/ |
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protected $shared_in; |
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/** |
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* Scopes of this instance belongs to |
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* |
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* @var string[] |
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* @access protected |
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*/ |
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protected $scopes = []; |
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/* |
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* {@inheritDoc} |
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*/ |
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public static function getShareable( |
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/*# string */ $scope = '' |
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)/*# : ShareableInterface */ { |
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// create the shared instance if not yet |
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if (!static::hasShareable($scope)) { |
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(new static())->setShareable($scope); |
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} |
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return self::$shareables[get_called_class()][$scope]; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public static function hasShareable(/*# string */ $scope = '')/*# : bool */ |
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{ |
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return isset(self::$shareables[get_called_class()][$scope]); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public static function clearShareable(/*# string */ $scope = '') |
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{ |
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if (static::hasShareable($scope)) { |
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$shared = static::getShareable($scope); |
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$shared->shared_in = null; |
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unset(self::$shareables[get_called_class()][$scope]); |
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} |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function setShareable(/*# string */ $scope = '') |
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{ |
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// this $scope has shareable already or $this is a shareable |
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if (static::hasShareable($scope) || $this->isShareable() !== false) { |
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throw new RuntimeException( |
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Message::get(Message::MSG_SHAREABLE_FAIL, $scope), |
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Message::MSG_SHAREABLE_FAIL |
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); |
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} |
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$this->shared_in = $scope; |
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self::$shareables[get_class($this)][$scope] = $this; |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function addScope(/*# string */ $scope) |
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{ |
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if ($this->isShareable() === false && |
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!$this->hasScope($scope) |
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) { |
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$this->scopes[] = $scope; |
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} |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function hasScope(/*# string */ $scope = '')/*# : bool */ |
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{ |
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return in_array($scope, $this->getScopes()); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getShareables()/*# : array */ |
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{ |
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$result = []; |
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foreach ($this->getScopes() as $scope) { |
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$result[] = static::getShareable($scope); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function isShareable() |
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{ |
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return is_null($this->shared_in) ? false : $this->shared_in; |
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} |
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/** |
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* Get all unique scopes for $this if not a shared instance |
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* |
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* @return array |
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* @access protected |
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*/ |
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protected function getScopes()/*# : array */ |
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{ |
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$result = []; |
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// skip shareable |
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if ($this->isShareable() !== false) { |
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return $result; |
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} |
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foreach ($this->scopes as $scope) { |
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$result = array_merge($result, $this->splitScope($scope)); |
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} |
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// add the global scope |
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$result[] = ''; |
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return array_unique($result); |
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} |
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/** |
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* Split a scope of 'vendor.app' into ['vendor.app', 'vendor'] |
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* |
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* @param string $scope |
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* @return array |
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* @access protected |
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*/ |
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protected function splitScope(/*# string */ $scope)/*# : array */ |
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{ |
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$result = []; |
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$parts = explode('.', $scope); |
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while (!empty($parts)) { |
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$result[] = join('.', $parts); |
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array_pop($parts); |
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} |
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return $result; |
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} |
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} |
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phossa2 /
shared
