prototype::unobserve() - Code Metrics - Ariadne-CMS/arc-prototype - Measure and Improve Code Quality continuously with Scrutinizer

prototype::unobserve() A
last analyzed 2021-05-10 16:24 UTC

↳ Parent: prototype

Complexity

Conditions	3
Paths	2

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	12

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	3
eloc	2
c	1
b	0
f	0
nc	2
nop	2
dl	0
loc	4
ccs	0
cts	3
cp	0
crap	12
rs	10

<?php
/*
 * This file is part of the Ariadne Component Library.
 *
 * (c) Muze <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace arc;

/**
 * Methods to create, extend and observe prototype objects in PHP. Also adds a memoize function,
 * which is useful when using a prototype object as a Dependency Injection container.
 * @package arc
 */
final class prototype
{

    /**
     * @var \SplObjectStorage contains a list of frozen objects and the observer
     */
    private static $frozen = null;

    /**
     * @var \SplObjectStorage contains a list of frozen objects and the observer
     */
    private static $sealed = null;

    /**
     * @var \SplObjectStorage contains a list of objects made unextensible and the observer
     */
    private static $notExtensible = null;

    /**
     * @var \SplObjectStorage contains a list of all 'child' instances for each prototype
     */
    private static $instances = null;

    /**
     * @var \SplObjectStorage contains a list of all observers for each prototype
     */
    private static $observers = null;

    /**
     * Returns a new \arc\prototype\Prototype object with the given properties. The 
     * properties array may contain closures, these will be available as methods on 
     * the new Prototype object.
     * @param array $properties List of properties and methods
     * @return \arc\prototype\Prototype
     */
    public static function create(array $properties = []) :prototype\Prototype
    {
        return new prototype\Prototype($properties);
    }

    /**
     * Returns a new \arc\prototype\Prototype object with the given object as its
     * prototype and the given properties and methods set.
     * @param \arc\prototype\Prototype $prototype The prototype for this object
     * @param array $properties List of properties and methods
     * @return \arc\prototype\Prototype
     */
    public static function extend(prototype\Prototype $prototype, array $properties = []) :prototype\Prototype
    {
        if (!isset(self::$instances)) {
            self::$instances = new \SplObjectStorage();
        };
        if (!isset(self::$instances[$prototype])) {
            self::$instances[$prototype] = [];
        }
        $properties['prototype'] = $prototype;
        $instance = new prototype\Prototype($properties);
        $list = self::$instances[$prototype];
        array_push($list,$instance);
        self::$instances[$prototype] = $list;
        return $instance;
    }

    /**
     * Helper method to remove cache information when a prototype is no longer needed.
     * @param \arc\prototype\Prototype $obj The object to be removed
     */
    public static function _destroy(prototype\Prototype $obj) :void
    {
        unset(self::$notExtensible[$obj]);
        unset(self::$sealed[$obj]);
        unset(self::$frozen[$obj]);
        unset(self::$observers[$obj]);
        if ( isset($obj->prototype) ) {
            $p = self::$instances[$obj->prototype];
            $p = array_filter($p, function($o) use ($obj) {
                return $o != $obj; // remove references to $obj
            });
            self::$instances[$obj->prototype] = $p;
        }
    }

    /**
     * Returns a new \arc\prototype\Prototype with the given prototype set. In addition 
     * all properties on the extra objects passed to this method will be copied to the 
     * new Prototype object. For any property that is set on multiple objects, the value 
     * of the property in the later object overwrites values from other objects.
     * @param \arc\prototype\Prototype $prototype the prototype for the new object
     * @param \arc\prototype\Prototype ...$object the objects whose properties will be assigned
     */
    public static function assign(prototype\Prototype $prototype, prototype\Prototype ...$objects) :prototype\Prototype
    {
        $properties = [];
        foreach ($objects as $obj) {
            $properties = $obj->properties + $properties;
        }
        return self::extend($prototype, $properties);
    }

    /**
     * This makes changes to the given Prototype object impossible.
     * The object becomes immutable. Any attempt to change the object will silently fail.
     * @param \arc\prototype\Prototype $prototype the object to freeze
     */
    public static function freeze(prototype\Prototype $prototype) :void
    {
        if (!isset(self::$frozen)) {
            self::$frozen = new \SplObjectStorage();
        }
        self::seal($prototype);
        self::$frozen[$prototype] = true;
    }

    /**
     * This prevents reconfiguring an object or adding new properties.
     * @param \arc\prototype\Prototype $prototype the object to freeze
     */
    public static function seal(prototype\Prototype $prototype) :void
    {
        if (!isset(self::$sealed)) {
            self::$sealed = new \SplObjectStorage();
        }
        self::preventExtensions($prototype);
        self::$sealed[$prototype] = true;
    }

    /**
     * Returns a list of keys of all the properties in the given prototype
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function keys(prototype\Prototype $prototype) :array
    {
        $entries = static::entries($prototype);
        return array_keys($entries);
    }

    /**
     * Returns an array with key:value pairs for all properties in the given prototype
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function entries(prototype\Prototype $prototype) :array
    {
        return $prototype->properties;
    }

    /**
     * Returns a list of all the property values in the given prototype
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function values(prototype\Prototype $prototype) :array
    {
        $entries = static::entries($prototype);
        return array_values($entries);
    }

    /**
     * Returns true if the the property name is available in this prototype
     * @param \arc\prototype\Prototype $prototype
     * @param string $property
     * @return bool
     */
    public static function hasProperty(prototype\Prototype $prototype, string $property) :bool
    {
        $entries = static::entries($prototype);
        return array_key_exists($property, $entries);
    }

    /**
     * Returns a list of all the property names defined in this prototype instance
     * without traversing its prototypes.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function ownKeys(prototype\Prototype $prototype) :array
    {
        $entries = static::ownEntries($prototype);
        return array_keys($entries);
    }

    /**
     * Returns an array with key:value pairs for all properties in this prototype
     * instance wihtout traversing its prototypes.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function ownEntries(prototype\Prototype $prototype) :array
    {
        return \arc\_getOwnEntries($prototype);
    }

    /**
     * Returns a list of all the property values in the given prototype
     * instance wihtout traversing its prototypes.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function ownValues(prototype\Prototype $prototype) :array
    {
        $entries = static::ownEntries($prototype);
        return array_values($entries);
    }

    /**
     * Returns true if the the property name is available in this prototype
     * instance wihtout traversing its prototypes.
     * @param \arc\prototype\Prototype $prototype
     * @param string $property
     * @return bool
     */
    public static function hasOwnProperty(prototype\Prototype $prototype, string $property) :bool
    {
        $entries = static::ownEntries($prototype);
        return array_key_exists($property, $entries);
    }

    /**
     * Returns true if the given prototype is made immutable by freeze()
     * @param \arc\prototype\Prototype $prototype
     * @return bool
     */
    public static function isFrozen(prototype\Prototype $prototype) :bool
    {
        return isset(self::$frozen[$prototype]);
    }

    /**
     * Returns true if the given prototype is sealed by seal()
     * @param \arc\prototype\Prototype $prototype
     * @return bool
     */
    public static function isSealed(prototype\Prototype $prototype) :bool
    {
        return isset(self::$sealed[$prototype]);
    }

    /**
     * Returns true if the given prototype is made not Extensible
     * @param \arc\prototype\Prototype $prototype
     * @return bool
     */
    public static function isExtensible(prototype\Prototype $prototype) :bool
    {
        return !isset(self::$notExtensible[$prototype]);
    }

    /**
     * This calls the $callback function each time a property of $prototype is
     * changed or unset. The callback is called with the prototype object, the
     * name of the property and the new value (null if unset).
     * If the closure returns false exactly (no other 'falsy' values will work),
     * the change will be cancelled
     * @param \arc\prototype\Prototype $prototype
     * @param \Closure $callback
     * @param array $acceptList (optional)
     */
    public static function observe(prototype\Prototype $prototype, callable $callback, array $acceptList=null) :void
    {
        if ( !isset(self::$observers) ) {
            self::$observers = new \SplObjectStorage();
        }
        if ( !isset(self::$observers[$prototype]) ) {
            self::$observers[$prototype] = [];
        }
        if ( !isset($acceptList) ) {
            $acceptList = ['add','update','delete','reconfigure'];
        }
        $observers = self::$observers[$prototype];
        foreach( $acceptList as $acceptType ) {
            if ( !isset($observers[$acceptType]) ) {
                $observers[$acceptType] = new \SplObjectStorage();
            }
            $observers[$acceptType][$callback] = true;
        }
        self::$observers[$prototype] = $observers;
    }

    /**
     * Returns a list of observers for the given prototype.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function getObservers(prototype\Prototype $prototype) :array
    {
        return (isset(self::$observers[$prototype]) ? self::$observers[$prototype] : [] );
    }

    /**
     * Makes an object no longer extensible.
     * @param \arc\prototype\Prototype $prototype
     */
    public static function preventExtensions(prototype\Prototype $prototype) :void
    {
        if ( !isset(self::$notExtensible) ) {
            self::$notExtensible = new \SplObjectStorage();
        }
        self::$notExtensible[$prototype] = true;
    }

    /**
     * Removes an observer callback for the given prototype.
     * @param \arc\prototype\Prototyp $prototype
     * @param \Closure $callback the observer callback to be removed
     */
    public static function unobserve(prototype\Prototype $prototype, callable $callback) :void
    {
        if ( isset(self::$observers) && isset(self::$observers[$prototype]) ) {
            unset(self::$observers[$prototype][$callback]);
        }
    }

    /**
     * Returns true if the object as the given prototype somewhere in its
     * prototype chain, including itself.
     * @param \arc\prototype\Prototype $object
     * @param \arc\prototype\Prototype $prototype
     * @return bool
     */
    public static function hasPrototype(prototype\Prototype $obj, prototype\Prototype $prototype) :bool
    {
        if (!$obj->prototype) {
            return false;
        }
        if ($obj === $prototype || $obj->prototype === $prototype) {
            return true;
        }

        return static::hasPrototype($obj->prototype, $prototype );
    }

    /**
     * Returns a list of prototype objects that have this prototype object
     * in their prototype chain.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function getDescendants(prototype\Prototype $prototype) :array
    {
        $instances = self::getInstances($prototype);
        $descendants = $instances;
        foreach ($instances as $instance) {
            $descendants += self::getDescendants($instance);
        }
        return $descendants;
    }

    /**
     * Returns a list of prototype objects that have this prototype object
     * as their direct prototype.
     * @param \arc\prototype\Prototype $prototype
     * @return array
     */
    public static function getInstances(prototype\Prototype $prototype) :array
    {
        return (isset(self::$instances[$prototype]) ? self::$instances[$prototype] : [] );
    }

    /**
     * Returns the full prototype chain for the given object.
     * @param \arc\prototype\Prototype $obj
     * @return array
     */
    public static function getPrototypes(prototype\Prototype $obj) :array
    {
        $prototypes = [];
        while ( $prototype = $obj->prototype ) {
            $prototypes[] = $prototype;
            $obj = $prototype;
        }
        return $prototypes;
    }

    /**
     * Returns a new function that calls the given function just once and then simply
     * returns its result on each subsequent call.
     * @param callable function to call just once and then remember the result
filter:
    dependency_paths: ["lib/*"]
     * @return \Closure
     */
    public static function memoize(callable $f) 
    {
        return memoize($f);
    }
}

/**
 * Helper function to make sure that the returned Closure is not defined in a static scope.
 * @param callable function to call just once and then remember the result
 * @return \Closure
 */
function memoize(callable $f) :callable
{
    return function () use ($f) {
        static $result;
        if (null === $result) {
            if ( $f instanceof \Closure && isset($this) ) {

                $f = \Closure::bind($f, $this);
            }
            $result = $f();
        }
        return $result;
    };
}

/**
 * 'private' function that must be declared outside static scope, so we can bind
 * the closure to an object to peek into its private _ownProperties property
 * @param \arc\prototype\Prototype $prototype
 * @return array
 */
function _getOwnEntries(prototype\Prototype $prototype) :array
{
    // this needs access to the private _ownProperties variable
    // this is one way to do that.
    $f = \Closure::bind(function() {
        return $this->_ownProperties;

    }, $prototype, $prototype);
    return $f();
}


1		<?php
2		/*
3		* This file is part of the Ariadne Component Library.
4		*
5		* (c) Muze <[email protected]>
6		*
7		* For the full copyright and license information, please view the LICENSE
8		* file that was distributed with this source code.
9		*/
10		namespace arc;
11
12		/**
13		* Methods to create, extend and observe prototype objects in PHP. Also adds a memoize function,
14		* which is useful when using a prototype object as a Dependency Injection container.
15		* @package arc
16		*/
17		final class prototype
18		{
19
20		/**
21		* @var \SplObjectStorage contains a list of frozen objects and the observer
22		*/
23		private static $frozen = null;
24
25		/**
26		* @var \SplObjectStorage contains a list of frozen objects and the observer
27		*/
28		private static $sealed = null;
29
30		/**
31		* @var \SplObjectStorage contains a list of objects made unextensible and the observer
32		*/
33		private static $notExtensible = null;
34
35		/**
36		* @var \SplObjectStorage contains a list of all 'child' instances for each prototype
37		*/
38		private static $instances = null;
39
40		/**
41		* @var \SplObjectStorage contains a list of all observers for each prototype
42		*/
43		private static $observers = null;
44
45		/**
46		* Returns a new \arc\prototype\Prototype object with the given properties. The
47		* properties array may contain closures, these will be available as methods on
48		* the new Prototype object.
49		* @param array $properties List of properties and methods
50		* @return \arc\prototype\Prototype
51		*/
52	32	public static function create(array $properties = []) :prototype\Prototype
53		{
54	32	return new prototype\Prototype($properties);
55		}
56
57		/**
58		* Returns a new \arc\prototype\Prototype object with the given object as its
59		* prototype and the given properties and methods set.
60		* @param \arc\prototype\Prototype $prototype The prototype for this object
61		* @param array $properties List of properties and methods
62		* @return \arc\prototype\Prototype
63		*/
64	10	public static function extend(prototype\Prototype $prototype, array $properties = []) :prototype\Prototype
65		{
66	10	if (!isset(self::$instances)) {
67	2	self::$instances = new \SplObjectStorage();
68		};
69	10	if (!isset(self::$instances[$prototype])) {
70	10	self::$instances[$prototype] = [];
71		}
72	10	$properties['prototype'] = $prototype;
73	10	$instance = new prototype\Prototype($properties);
74	10	$list = self::$instances[$prototype];
75	10	array_push($list,$instance);
76	10	self::$instances[$prototype] = $list;
77	10	return $instance;
78		}
79
80		/**
81		* Helper method to remove cache information when a prototype is no longer needed.
82		* @param \arc\prototype\Prototype $obj The object to be removed
83		*/
84	12	public static function _destroy(prototype\Prototype $obj) :void
85		{
86	12	unset(self::$notExtensible[$obj]);
87	12	unset(self::$sealed[$obj]);
88	12	unset(self::$frozen[$obj]);
89	12	unset(self::$observers[$obj]);
90	12	if ( isset($obj->prototype) ) {
91		$p = self::$instances[$obj->prototype];
92		$p = array_filter($p, function($o) use ($obj) {
93		return $o != $obj; // remove references to $obj
94		});
95		self::$instances[$obj->prototype] = $p;
96		}
97	12	}
98
99		/**
100		* Returns a new \arc\prototype\Prototype with the given prototype set. In addition
101		* all properties on the extra objects passed to this method will be copied to the
102		* new Prototype object. For any property that is set on multiple objects, the value
103		* of the property in the later object overwrites values from other objects.
104		* @param \arc\prototype\Prototype $prototype the prototype for the new object
105		* @param \arc\prototype\Prototype ...$object the objects whose properties will be assigned
106		*/
107	2	public static function assign(prototype\Prototype $prototype, prototype\Prototype ...$objects) :prototype\Prototype
108		{
109	2	$properties = [];
110	2	foreach ($objects as $obj) {
111	2	$properties = $obj->properties + $properties;
112		}
113	2	return self::extend($prototype, $properties);
114		}
115
116		/**
117		* This makes changes to the given Prototype object impossible.
118		* The object becomes immutable. Any attempt to change the object will silently fail.
119		* @param \arc\prototype\Prototype $prototype the object to freeze
120		*/
121	2	public static function freeze(prototype\Prototype $prototype) :void
122		{
123	2	if (!isset(self::$frozen)) {
124	2	self::$frozen = new \SplObjectStorage();
125		}
126	2	self::seal($prototype);
127	2	self::$frozen[$prototype] = true;
128	2	}
129
130		/**
131		* This prevents reconfiguring an object or adding new properties.
132		* @param \arc\prototype\Prototype $prototype the object to freeze
133		*/
134	2	public static function seal(prototype\Prototype $prototype) :void
135		{
136	2	if (!isset(self::$sealed)) {
137	2	self::$sealed = new \SplObjectStorage();
138		}
139	2	self::preventExtensions($prototype);
140	2	self::$sealed[$prototype] = true;
141	2	}
142
143		/**
144		* Returns a list of keys of all the properties in the given prototype
145		* @param \arc\prototype\Prototype $prototype
146		* @return array
147		*/
148		public static function keys(prototype\Prototype $prototype) :array
149		{
150		$entries = static::entries($prototype);
151		return array_keys($entries);
152		}
153
154		/**
155		* Returns an array with key:value pairs for all properties in the given prototype
156		* @param \arc\prototype\Prototype $prototype
157		* @return array
158		*/
159		public static function entries(prototype\Prototype $prototype) :array
160		{
161		return $prototype->properties;
162		}
163
164		/**
165		* Returns a list of all the property values in the given prototype
166		* @param \arc\prototype\Prototype $prototype
167		* @return array
168		*/
169		public static function values(prototype\Prototype $prototype) :array
170		{
171		$entries = static::entries($prototype);
172		return array_values($entries);
173		}
174
175		/**
176		* Returns true if the the property name is available in this prototype
177		* @param \arc\prototype\Prototype $prototype
178		* @param string $property
179		* @return bool
180		*/
181		public static function hasProperty(prototype\Prototype $prototype, string $property) :bool
182		{
183		$entries = static::entries($prototype);
184		return array_key_exists($property, $entries);
185		}
186
187		/**
188		* Returns a list of all the property names defined in this prototype instance
189		* without traversing its prototypes.
190		* @param \arc\prototype\Prototype $prototype
191		* @return array
192		*/
193		public static function ownKeys(prototype\Prototype $prototype) :array
194		{
195		$entries = static::ownEntries($prototype);
196		return array_keys($entries);
197		}
198
199		/**
200		* Returns an array with key:value pairs for all properties in this prototype
201		* instance wihtout traversing its prototypes.
202		* @param \arc\prototype\Prototype $prototype
203		* @return array
204		*/
205	2	public static function ownEntries(prototype\Prototype $prototype) :array
206		{
207	2	return \arc\_getOwnEntries($prototype);
208		}
209
210		/**
211		* Returns a list of all the property values in the given prototype
212		* instance wihtout traversing its prototypes.
213		* @param \arc\prototype\Prototype $prototype
214		* @return array
215		*/
216		public static function ownValues(prototype\Prototype $prototype) :array
217		{
218		$entries = static::ownEntries($prototype);
219		return array_values($entries);
220		}
221
222		/**
223		* Returns true if the the property name is available in this prototype
224		* instance wihtout traversing its prototypes.
225		* @param \arc\prototype\Prototype $prototype
226		* @param string $property
227		* @return bool
228		*/
229	2	public static function hasOwnProperty(prototype\Prototype $prototype, string $property) :bool
230		{
231	2	$entries = static::ownEntries($prototype);
232	2	return array_key_exists($property, $entries);
233		}
234
235		/**
236		* Returns true if the given prototype is made immutable by freeze()
237		* @param \arc\prototype\Prototype $prototype
238		* @return bool
239		*/
240		public static function isFrozen(prototype\Prototype $prototype) :bool
241		{
242		return isset(self::$frozen[$prototype]);
243		}
244
245		/**
246		* Returns true if the given prototype is sealed by seal()
247		* @param \arc\prototype\Prototype $prototype
248		* @return bool
249		*/
250	8	public static function isSealed(prototype\Prototype $prototype) :bool
251		{
252	8	return isset(self::$sealed[$prototype]);
253		}
254
255		/**
256		* Returns true if the given prototype is made not Extensible
257		* @param \arc\prototype\Prototype $prototype
258		* @return bool
259		*/
260	6	public static function isExtensible(prototype\Prototype $prototype) :bool
261		{
262	6	return !isset(self::$notExtensible[$prototype]);
263		}
264
265		/**
266		* This calls the $callback function each time a property of $prototype is
267		* changed or unset. The callback is called with the prototype object, the
268		* name of the property and the new value (null if unset).
269		* If the closure returns false exactly (no other 'falsy' values will work),
270		* the change will be cancelled
271		* @param \arc\prototype\Prototype $prototype
272		* @param \Closure $callback
273		* @param array $acceptList (optional)
274		*/
275	2	public static function observe(prototype\Prototype $prototype, callable $callback, array $acceptList=null) :void
276		{
277	2	if ( !isset(self::$observers) ) {
278	2	self::$observers = new \SplObjectStorage();
279		}
280	2	if ( !isset(self::$observers[$prototype]) ) {
281	2	self::$observers[$prototype] = [];
282		}
283	2	if ( !isset($acceptList) ) {
284	2	$acceptList = ['add','update','delete','reconfigure'];
285		}
286	2	$observers = self::$observers[$prototype];
287	2	foreach( $acceptList as $acceptType ) {
288	2	if ( !isset($observers[$acceptType]) ) {
289	2	$observers[$acceptType] = new \SplObjectStorage();
290		}
291	2	$observers[$acceptType][$callback] = true;
292		}
293	2	self::$observers[$prototype] = $observers;
294	2	}
295
296		/**
297		* Returns a list of observers for the given prototype.
298		* @param \arc\prototype\Prototype $prototype
299		* @return array
300		*/
301	2	public static function getObservers(prototype\Prototype $prototype) :array
302		{
303	2	return (isset(self::$observers[$prototype]) ? self::$observers[$prototype] : [] );
304		}
305
306		/**
307		* Makes an object no longer extensible.
308		* @param \arc\prototype\Prototype $prototype
309		*/
310	4	public static function preventExtensions(prototype\Prototype $prototype) :void
311		{
312	4	if ( !isset(self::$notExtensible) ) {
313	2	self::$notExtensible = new \SplObjectStorage();
314		}
315	4	self::$notExtensible[$prototype] = true;
316	4	}
317
318		/**
319		* Removes an observer callback for the given prototype.
320		* @param \arc\prototype\Prototyp $prototype
321		* @param \Closure $callback the observer callback to be removed
322		*/
323		public static function unobserve(prototype\Prototype $prototype, callable $callback) :void
324		{
325		if ( isset(self::$observers) && isset(self::$observers[$prototype]) ) {
326		unset(self::$observers[$prototype][$callback]);
327		}
328		}
329
330		/**
331		* Returns true if the object as the given prototype somewhere in its
332		* prototype chain, including itself.
333		* @param \arc\prototype\Prototype $object
334		* @param \arc\prototype\Prototype $prototype
335		* @return bool
336		*/
337	2	public static function hasPrototype(prototype\Prototype $obj, prototype\Prototype $prototype) :bool
338		{
339	2	if (!$obj->prototype) {
340		return false;
341		}
342	2	if ($obj === $prototype \|\| $obj->prototype === $prototype) {
343	2	return true;
344		}
345
346		return static::hasPrototype($obj->prototype, $prototype );
347		}
348
349		/**
350		* Returns a list of prototype objects that have this prototype object
351		* in their prototype chain.
352		* @param \arc\prototype\Prototype $prototype
353		* @return array
354		*/
355		public static function getDescendants(prototype\Prototype $prototype) :array
356		{
357		$instances = self::getInstances($prototype);
358		$descendants = $instances;
359		foreach ($instances as $instance) {
360		$descendants += self::getDescendants($instance);
361		}
362		return $descendants;
363		}
364
365		/**
366		* Returns a list of prototype objects that have this prototype object
367		* as their direct prototype.
368		* @param \arc\prototype\Prototype $prototype
369		* @return array
370		*/
371	2	public static function getInstances(prototype\Prototype $prototype) :array
372		{
373	2	return (isset(self::$instances[$prototype]) ? self::$instances[$prototype] : [] );
374		}
375
376		/**
377		* Returns the full prototype chain for the given object.
378		* @param \arc\prototype\Prototype $obj
379		* @return array
380		*/
381	2	public static function getPrototypes(prototype\Prototype $obj) :array
382		{
383	2	$prototypes = [];
384	2	while ( $prototype = $obj->prototype ) {
385	2	$prototypes[] = $prototype;
386	2	$obj = $prototype;
387		}
388	2	return $prototypes;
389		}
390
391		/**
392		* Returns a new function that calls the given function just once and then simply
393		* returns its result on each subsequent call.
394		* @param callable function to call just once and then remember the result
		0 ignored issues – show Bug introduced 2020-10-22 11:59 UTC by Report Bug Copy Issue Report The type `arc\function` was not found. Maybe you did not declare it correctly or list all dependencies? The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g. `excluded_paths: ["lib/"]`, you can move it to the dependency path list as follows: filter: dependency_paths: ["lib/"] For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths Loading history...
395		* @return \Closure
396		*/
397		public static function memoize(callable $f)
398		{
399		return memoize($f);
400		}
401		}
402
403		/**
404		* Helper function to make sure that the returned Closure is not defined in a static scope.
405		* @param callable function to call just once and then remember the result
406		* @return \Closure
407		*/
408	1	function memoize(callable $f) :callable
409		{
410		return function () use ($f) {
411		static $result;
412		if (null === $result) {
413		if ( $f instanceof \Closure && isset($this) ) {
		0 ignored issues – show Comprehensibility Best Practice introduced 2020-10-22 11:59 UTC by Report Bug Copy Issue Report The variable `$this` seems to never exist and therefore `isset` should always be `false`. Loading history...
414		$f = \Closure::bind($f, $this);
415		}
416		$result = $f();
417		}
418		return $result;
419		};
420		}
421
422		/**
423		* 'private' function that must be declared outside static scope, so we can bind
424		* the closure to an object to peek into its private _ownProperties property
425		* @param \arc\prototype\Prototype $prototype
426		* @return array
427		*/
428	1	function _getOwnEntries(prototype\Prototype $prototype) :array
429		{
430		// this needs access to the private _ownProperties variable
431		// this is one way to do that.
432	2	$f = \Closure::bind(function() {
433	2	return $this->_ownProperties;
		0 ignored issues – show Comprehensibility Best Practice introduced 2020-10-22 11:59 UTC by Report Bug Copy Issue Report The variable `$this` seems to be never defined. Loading history...
434	2	}, $prototype, $prototype);
435	2	return $f();
436		}
437

Ariadne-CMS / arc-prototype

prototype::unobserve() A last analyzed 2021-05-10 16:24 UTC

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prototype::unobserve() A
last analyzed 2021-05-10 16:24 UTC