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- 28.08.2024
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MagicUnset.php
001 <?php
002
003 declare(strict_types=1);
004
005 namespace ProxyManager\ProxyGenerator\LazyLoadingGhost\MethodGenerator;
006
007 use ProxyManager\Generator\MagicMethodGenerator;
008 use Zend\Code\Generator\ParameterGenerator;
009 use ProxyManager\ProxyGenerator\LazyLoadingGhost\PropertyGenerator\PrivatePropertiesMap;
010 use ProxyManager\ProxyGenerator\LazyLoadingGhost\PropertyGenerator\ProtectedPropertiesMap;
011 use ProxyManager\ProxyGenerator\PropertyGenerator\PublicPropertiesMap;
012 use ProxyManager\ProxyGenerator\Util\PublicScopeSimulator;
013 use ReflectionClass;
014 use Zend\Code\Generator\MethodGenerator;
015 use Zend\Code\Generator\PropertyGenerator;
016
017 /**
018 * Magic `__unset` method for lazy loading ghost objects
019 *
020 * @author Marco Pivetta <ocramius@gmail.com>
021 * @license MIT
022 */
023 class MagicUnset extends MagicMethodGenerator
024 {
025 /**
026 * @var string
027 */
028 private $callParentTemplate = <<<'PHP'
029 %s
030
031 if (isset(self::$%s[$name])) {
032 unset($this->$name);
033
034 return;
035 }
036
037 if (isset(self::$%s[$name])) {
038 // check protected property access via compatible class
039 $callers = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT, 2);
040 $caller = isset($callers[1]) ? $callers[1] : [];
041 $object = isset($caller['object']) ? $caller['object'] : '';
042 $expectedType = self::$%s[$name];
043
044 if ($object instanceof $expectedType) {
045 unset($this->$name);
046
047 return;
048 }
049
050 $class = isset($caller['class']) ? $caller['class'] : '';
051
052 if ($class === $expectedType || is_subclass_of($class, $expectedType) || $class === 'ReflectionProperty') {
053 unset($this->$name);
054
055 return;
056 }
057 } elseif (isset(self::$%s[$name])) {
058 // check private property access via same class
059 $callers = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT, 2);
060 $caller = isset($callers[1]) ? $callers[1] : [];
061 $class = isset($caller['class']) ? $caller['class'] : '';
062
063 static $accessorCache = [];
064
065 if (isset(self::$%s[$name][$class])) {
066 $cacheKey = $class . '#' . $name;
067 $accessor = isset($accessorCache[$cacheKey])
068 ? $accessorCache[$cacheKey]
069 : $accessorCache[$cacheKey] = \Closure::bind(function ($instance) use ($name) {
070 unset($instance->$name);
071 }, null, $class);
072
073 return $accessor($this);
074 }
075
076 if ('ReflectionProperty' === $class) {
077 $tmpClass = key(self::$%s[$name]);
078 $cacheKey = $tmpClass . '#' . $name;
079 $accessor = isset($accessorCache[$cacheKey])
080 ? $accessorCache[$cacheKey]
081 : $accessorCache[$cacheKey] = \Closure::bind(function ($instance) use ($name) {
082 unset($instance->$name);
083 }, null, $tmpClass);
084
085 return $accessor($this);
086 }
087 }
088
089 %s
090 PHP;
091
092
093 /**
094 * @param ReflectionClass $originalClass
095 * @param PropertyGenerator $initializerProperty
096 * @param MethodGenerator $callInitializer
097 * @param PublicPropertiesMap $publicProperties
098 * @param ProtectedPropertiesMap $protectedProperties
099 * @param PrivatePropertiesMap $privateProperties
100 *
101 * @throws \Zend\Code\Generator\Exception\InvalidArgumentException
102 * @throws \InvalidArgumentException
103 */
104 public function __construct(
105 ReflectionClass $originalClass,
106 PropertyGenerator $initializerProperty,
107 MethodGenerator $callInitializer,
108 PublicPropertiesMap $publicProperties,
109 ProtectedPropertiesMap $protectedProperties,
110 PrivatePropertiesMap $privateProperties
111 ) {
112 parent::__construct($originalClass, '__unset', [new ParameterGenerator('name')]);
113
114 $override = $originalClass->hasMethod('__unset');
115
116 $parentAccess = 'return parent::__unset($name);';
117
118 if (! $override) {
119 $parentAccess = PublicScopeSimulator::getPublicAccessSimulationCode(
120 PublicScopeSimulator::OPERATION_UNSET,
121 'name'
122 );
123 }
124
125 $this->setBody(sprintf(
126 $this->callParentTemplate,
127 '$this->' . $initializerProperty->getName() . ' && $this->' . $callInitializer->getName()
128 . '(\'__unset\', array(\'name\' => $name));',
129 $publicProperties->getName(),
130 $protectedProperties->getName(),
131 $protectedProperties->getName(),
132 $privateProperties->getName(),
133 $privateProperties->getName(),
134 $privateProperties->getName(),
135 $parentAccess
136 ));
137 }
138 }
139