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<?php |
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/** |
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* @package CleverStyle Framework |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2013-2016, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs\Singleton; |
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use |
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cs\False_class, |
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cs\Request; |
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/** |
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* Singleton trait |
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* |
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* Provides Singleton-like implementation with some advanced capabilities |
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*/ |
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trait Base { |
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private $__request_id; |
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final protected function __construct () { |
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} |
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protected function construct () { |
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} |
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/** |
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* Get instance of class |
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* |
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* @param bool $check If true - checks, if instance was already created, if not - instance of cs\False_class will be returned |
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* |
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* @return False_class|static |
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*/ |
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static function instance ($check = false) { |
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static $instance; |
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return self::instance_prototype($instance, $check); |
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} |
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/** |
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* Get instance of class |
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* |
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* @param static $instance |
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* @param bool $check If true - checks, if instance was already created, if not - instance of cs\False_class will be returned |
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* |
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* @return False_class|static |
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*/ |
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protected static function instance_prototype (&$instance, $check = false) { |
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static::instance_prototype_state_init($instance); |
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if (is_object($instance)) { |
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return $instance; |
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} |
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if ($check) { |
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return False_class::instance(); |
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} |
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$called_class = get_called_class(); |
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if (strpos($called_class, 'cs') !== 0) { |
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return False_class::instance(); |
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} |
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list($aliases, $final_class) = static::instance_prototype_get_aliases_final_class($called_class); |
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foreach ($aliases as $alias) { |
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/** |
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* If for whatever reason base class does not exists or file that should be included does not exists |
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*/ |
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if ( |
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!class_exists($alias['original'], false) || |
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!file_exists($alias['path']) |
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) { |
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clean_classes_cache(); |
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$instance = static::instance_create($called_class, $called_class); |
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return $instance; |
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} |
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class_alias($alias['original'], $alias['alias']); |
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require_once $alias['path']; |
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} |
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$instance = static::instance_create($called_class, $final_class); |
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return $instance; |
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} |
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/** |
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* @param string $called_class |
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* @param string $final_class |
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* |
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* @return static |
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*/ |
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protected static function instance_create ($called_class, $final_class) { |
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if ($final_class != $called_class) { |
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/** |
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* We can't access protected methods of class if it doesn't extend current class, so let's call its `::instance()` method instead |
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*/ |
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return $final_class::instance(); |
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} |
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$instance = new $called_class; |
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static::instance_prototype_state_init($instance); |
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$instance->construct(); |
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return $instance; |
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} |
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/** |
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* @param string $class |
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* |
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* @return array |
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*/ |
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protected static function instance_prototype_get_aliases_final_class ($class) { |
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$modified_classes = modified_classes(); |
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if (!isset($modified_classes[$class])) { |
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$custom_class_base = 'cs\\custom'.substr($class, 2); |
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$next_alias = $class; |
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$aliases = []; |
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if (class_exists($custom_class_base, false)) { |
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$next_alias = $custom_class_base; |
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} |
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$custom_classes_paths = defined('CUSTOM') ? glob(CUSTOM.'/classes/'.str_replace('\\', '/', substr($class, 3)).'_*.php') : []; |
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$custom_length = strlen(CUSTOM.'/classes/'); |
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foreach ($custom_classes_paths as $custom_class_path) { |
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$custom_class = substr($custom_class_path, $custom_length, -4); |
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$custom_class = 'cs\\custom\\'.str_replace('/', '\\', $custom_class); |
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// Same path with prefixed class name |
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$_custom_class = explode('\\', $custom_class); |
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$_custom_class[] = '_'.array_pop($_custom_class); |
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$_custom_class = implode('\\', $_custom_class); |
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$aliases[] = [ |
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'original' => $next_alias, |
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'alias' => $_custom_class, |
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'path' => $custom_class_path |
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]; |
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$next_alias = $custom_class; |
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} |
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$modified_classes[$class] = [ |
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'aliases' => $aliases, |
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'final_class' => $next_alias |
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]; |
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modified_classes($modified_classes); |
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} |
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return [ |
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$modified_classes[$class]['aliases'], |
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$modified_classes[$class]['final_class'] |
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]; |
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} |
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/** |
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* @param static $instance |
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*/ |
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protected static function instance_prototype_state_init (&$instance) { |
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if ($instance && $instance->__request_id !== Request::$id) { |
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$instance->__request_id = Request::$id; |
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if (defined('static::INIT_STATE_METHOD')) { |
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$instance->{constant('static::INIT_STATE_METHOD')}(); |
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} |
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} |
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} |
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final protected function __clone () { |
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} |
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final protected function __wakeup () { |
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} |
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} |
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nazar-pc /
CleverStyle-Framework
