| 1: | <?php declare(strict_types=1); |
| 2: | |
| 3: | namespace Salient\Iterator; |
| 4: | |
| 5: | use Iterator; |
| 6: | use LogicException; |
| 7: | use ReturnTypeWillChange; |
| 8: | use Traversable; |
| 9: | |
| 10: | /** |
| 11: | * Iterates over the properties of an object or the elements of an array |
| 12: | * |
| 13: | * @api |
| 14: | * |
| 15: | * @implements Iterator<array-key,mixed> |
| 16: | */ |
| 17: | class GraphIterator implements Iterator |
| 18: | { |
| 19: | /** @var object|mixed[] */ |
| 20: | protected $Graph; |
| 21: | /** @var array<array-key> */ |
| 22: | protected array $Keys = []; |
| 23: | protected bool $IsObject = true; |
| 24: | |
| 25: | /** |
| 26: | * @param object|mixed[] $graph |
| 27: | */ |
| 28: | public function __construct($graph) |
| 29: | { |
| 30: | $this->doConstruct($graph); |
| 31: | } |
| 32: | |
| 33: | /** |
| 34: | * @param object|mixed[] $graph |
| 35: | */ |
| 36: | protected function doConstruct(&$graph): void |
| 37: | { |
| 38: | if (is_array($graph)) { |
| 39: | $this->Graph = &$graph; |
| 40: | $this->Keys = array_keys($graph); |
| 41: | $this->IsObject = false; |
| 42: | return; |
| 43: | } |
| 44: | |
| 45: | if ($graph instanceof Traversable) { |
| 46: | throw new LogicException('Traversable objects are not supported'); |
| 47: | } |
| 48: | |
| 49: | $this->Graph = $graph; |
| 50: | // @phpstan-ignore foreach.nonIterable |
| 51: | foreach ($graph as $key => $value) { |
| 52: | $this->Keys[] = $key; |
| 53: | } |
| 54: | } |
| 55: | |
| 56: | /** |
| 57: | * @return mixed|false |
| 58: | * @disregard P1038 |
| 59: | */ |
| 60: | #[ReturnTypeWillChange] |
| 61: | public function current() |
| 62: | { |
| 63: | $key = current($this->Keys); |
| 64: | if ($key === false) { |
| 65: | // @codeCoverageIgnoreStart |
| 66: | return false; |
| 67: | // @codeCoverageIgnoreEnd |
| 68: | } |
| 69: | |
| 70: | return $this->IsObject |
| 71: | ? $this->Graph->{$key} |
| 72: | // @phpstan-ignore offsetAccess.nonOffsetAccessible |
| 73: | : $this->Graph[$key]; |
| 74: | } |
| 75: | |
| 76: | /** |
| 77: | * @return array-key|null |
| 78: | * @disregard P1038 |
| 79: | */ |
| 80: | #[ReturnTypeWillChange] |
| 81: | public function key() |
| 82: | { |
| 83: | $key = current($this->Keys); |
| 84: | if ($key === false) { |
| 85: | // @codeCoverageIgnoreStart |
| 86: | return null; |
| 87: | // @codeCoverageIgnoreEnd |
| 88: | } |
| 89: | return $key; |
| 90: | } |
| 91: | |
| 92: | /** |
| 93: | * @inheritDoc |
| 94: | */ |
| 95: | public function next(): void |
| 96: | { |
| 97: | next($this->Keys); |
| 98: | } |
| 99: | |
| 100: | /** |
| 101: | * @inheritDoc |
| 102: | */ |
| 103: | public function rewind(): void |
| 104: | { |
| 105: | reset($this->Keys); |
| 106: | } |
| 107: | |
| 108: | /** |
| 109: | * @inheritDoc |
| 110: | */ |
| 111: | public function valid(): bool |
| 112: | { |
| 113: | return current($this->Keys) !== false; |
| 114: | } |
| 115: | } |
| 116: |