File Toolkit/Core/Concern/HasMutator.php

1:	<?php declare(strict_types=1);
2:
3:	namespace Salient\Core\Concern;
4:
5:	use Salient\Contract\Core\Immutable;
6:	use ReflectionProperty;
7:
8:	/**
9:	* @api
10:	*
11:	* @phpstan-require-implements Immutable
12:	*/
13:	trait HasMutator
14:	{
15:	/**
16:	* Get a copy of the object with a value assigned to a property if its
17:	* current value differs, otherwise return the object
18:	*
19:	* @param mixed $value
20:	* @return static
21:	*/
22:	private function with(string $property, $value)
23:	{
24:	if ((
25:	isset($this->$property)
26:	\|\| ($value === null && $this->propertyIsInitialized($property))
27:	) && $value === $this->$property) {
28:	return $this;
29:	}
30:
31:	$clone = clone $this;
32:	$clone->$property = $value;
33:	return $clone;
34:	}
35:
36:	/**
37:	* Get a copy of the object where a property is unset if it is currently
38:	* set, otherwise return the object
39:	*
40:	* @return static
41:	*/
42:	private function without(string $property)
43:	{
44:	if (
45:	!isset($this->$property)
46:	&& !$this->propertyIsInitialized($property)
47:	) {
48:	return $this;
49:	}
50:
51:	$clone = clone $this;
52:	unset($clone->$property);
53:	return $clone;
54:	}
55:
56:	private function propertyIsInitialized(string $property): bool
57:	{
58:	if (!property_exists($this, $property)) {
59:	return false;
60:	}
61:
62:	$property = new ReflectionProperty($this, $property);
63:	$property->setAccessible(true);
64:
65:	return $property->isInitialized($this);
66:	}
67:	}
68: