File Toolkit/Iterator/GraphIterator.php

1:	<?php declare(strict_types=1);
2:
3:	namespace Salient\Iterator;
4:
5:	use Iterator;
6:	use OutOfRangeException;
7:	use ReturnTypeWillChange;
8:
9:	/**
10:	* Iterates over arrays and objects
11:	*
12:	* @api
13:	*
14:	* @implements Iterator<array-key,mixed>
15:	*/
16:	class GraphIterator implements Iterator
17:	{
18:	protected object $Object;
19:	/** @var mixed[] */
20:	protected array $Array;
21:	protected bool $IsObject;
22:	/** @var array-key[] */
23:	protected array $Keys;
24:
25:	/**
26:	* @api
27:	*
28:	* @param mixed[]\|object $value
29:	*/
30:	public function __construct(&$value)
31:	{
32:	if (is_object($value)) {
33:	$this->Object = $value;
34:	$this->IsObject = true;
35:	} else {
36:	$this->Array = &$value;
37:	$this->IsObject = false;
38:	}
39:	}
40:
41:	/**
42:	* @return mixed
43:	* @disregard P1038
44:	*/
45:	#[ReturnTypeWillChange]
46:	public function current()
47:	{
48:	if (
49:	!isset($this->Keys)
50:	\|\| ($key = current($this->Keys)) === false
51:	) {
52:	throw new OutOfRangeException('Invalid position');
53:	}
54:	return $this->IsObject
55:	? $this->Object->{$key}
56:	: $this->Array[$key];
57:	}
58:
59:	/**
60:	* @return array-key\|null
61:	* @disregard P1038
62:	*/
63:	#[ReturnTypeWillChange]
64:	public function key()
65:	{
66:	return !isset($this->Keys)
67:	\|\| ($key = current($this->Keys)) === false
68:	? null
69:	: $key;
70:	}
71:
72:	/**
73:	* @inheritDoc
74:	*/
75:	public function next(): void
76:	{
77:	if (isset($this->Keys)) {
78:	next($this->Keys);
79:	}
80:	}
81:
82:	/**
83:	* @inheritDoc
84:	*/
85:	public function rewind(): void
86:	{
87:	$this->Keys = $this->IsObject
88:	? array_keys(get_object_vars($this->Object))
89:	: array_keys($this->Array);
90:	reset($this->Keys);
91:	}
92:
93:	/**
94:	* @inheritDoc
95:	*/
96:	public function valid(): bool
97:	{
98:	return isset($this->Keys)
99:	&& current($this->Keys) !== false;
100:	}
101:	}
102:

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