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<?php |
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namespace Cerbero\JsonParser\Pointers; |
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use Cerbero\JsonParser\Exceptions\InvalidPointerException; |
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use Cerbero\JsonParser\Tree; |
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use Closure; |
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use Stringable; |
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use function count; |
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use function call_user_func; |
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use function is_int; |
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use function array_slice; |
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/** |
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* The JSON pointer. |
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* |
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*/ |
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final class Pointer implements Stringable |
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{ |
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/** |
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* The reference tokens. |
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* |
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* @var string[] |
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*/ |
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private array $referenceTokens; |
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/** |
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* The pointer depth. |
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* |
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* @var int |
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*/ |
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private int $depth; |
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/** |
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* The pointer callback. |
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* |
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* @var Closure |
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*/ |
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private ?Closure $callback; |
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/** |
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* Whether the pointer was found. |
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* |
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* @var bool |
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*/ |
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public bool $wasFound = false; |
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/** |
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* Instantiate the class. |
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* |
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* @param string $pointer |
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* @param Closure|null $callback |
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*/ |
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public function __construct(private string $pointer, Closure $callback = null) |
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{ |
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$this->referenceTokens = $this->toReferenceTokens(); |
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135 |
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$this->depth = count($this->referenceTokens); |
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$this->callback = $callback; |
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} |
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/** |
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* Turn the JSON pointer into reference tokens |
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* |
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* @return string[] |
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*/ |
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private function toReferenceTokens(): array |
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{ |
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if (preg_match('#^(?:/(?:(?:[^/~])|(?:~[01]))*)*$#', $this->pointer) === 0) { |
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throw new InvalidPointerException($this->pointer); |
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} |
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135 |
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$tokens = explode('/', $this->pointer); |
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135 |
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$referenceTokens = array_map(fn (string $token) => str_replace(['~1', '~0'], ['/', '~'], $token), $tokens); |
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return array_slice($referenceTokens, 1); |
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} |
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/** |
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* Retrieve the reference tokens |
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* |
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* @return string[] |
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*/ |
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public function referenceTokens(): array |
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{ |
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return $this->referenceTokens; |
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} |
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/** |
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* Retrieve the JSON pointer depth |
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* |
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* @return int |
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*/ |
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public function depth(): int |
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{ |
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return $this->depth; |
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} |
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/** |
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* Call the pointer callback |
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* |
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* @param mixed $value |
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* @param mixed $key |
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* @return mixed |
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*/ |
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public function call(mixed $value, mixed $key): mixed |
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{ |
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if ($this->callback === null) { |
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return $value; |
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} |
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return call_user_func($this->callback, $value, $key) ?? $value; |
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} |
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/** |
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* Determine whether the reference token at the given depth matches the provided key |
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* |
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* @param int $depth |
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* @param string|int $key |
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* @return bool |
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*/ |
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public function depthMatchesKey(int $depth, string|int $key): bool |
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{ |
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$referenceToken = $this->referenceTokens[$depth] ?? null; |
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return $referenceToken === (string) $key |
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|| (is_int($key) && $referenceToken === '-'); |
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} |
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/** |
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* Determine whether the pointer matches the given tree |
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* |
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* @param Tree $tree |
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* @return bool |
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*/ |
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public function matchesTree(Tree $tree): bool |
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{ |
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return $this->referenceTokens == [] |
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|| $this->referenceTokens == $tree->original() |
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|| $this->referenceTokens == $tree->wildcarded(); |
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} |
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/** |
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* Determine whether the pointer includes the given tree |
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* |
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* @param Tree $tree |
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* @return bool |
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*/ |
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public function includesTree(Tree $tree): bool |
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{ |
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if ($this->pointer == '') { |
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return true; |
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} |
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return is_int($firstNest = array_search('-', $this->referenceTokens)) |
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&& array_slice($this->referenceTokens, 0, $firstNest) === array_slice($tree->original(), 0, $firstNest); |
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} |
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/** |
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* Retrieve the underlying JSON pointer |
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* |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return $this->pointer; |
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} |
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} |
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cerbero90 /
json-parser
