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<?php |
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/** |
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* This file is part of NACL. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @copyright 2019 Nuglif (2018) Inc. |
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* @license http://www.opensource.org/licenses/mit-license.html MIT License |
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* @author Pierrick Charron <[email protected]> |
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* @author Charle Demers <[email protected]> |
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*/ |
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namespace Nuglif\Nacl; |
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class ReferenceNode extends Node |
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{ |
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const ROOT = '/'; |
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private $path; |
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private $isResolving = false; |
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private $isResolved = false; |
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private $file; |
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private $line; |
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private $value; |
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public function __construct($path, $file, $line) |
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{ |
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$this->path = $path; |
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$this->file = $file; |
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$this->line = $line; |
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} |
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public function getNativeValue() |
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{ |
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if (!$this->isResolved) { |
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$this->resolve(); |
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} |
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return $this->value; |
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} |
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private function resolve() |
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{ |
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if ($this->isResolving) { |
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throw new ReferenceException('Circular dependence detected.', $this->file, $this->line); |
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} |
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if ($this->path instanceof Node) { |
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$this->path = $this->path->getNativeValue(); |
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} |
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if (!is_string($this->path)) { |
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throw new ReferenceException(sprintf('.ref expects parameter to be string, %s given.', gettype($this->path)), $this->file, $this->line); |
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} |
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$this->isResolving = true; |
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$value = $this->isAbsolute() ? $this->getRoot() : $this->getParent(); |
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foreach (explode('/', ltrim($this->path, self::ROOT)) as $path) { |
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switch ($path) { |
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case '.': |
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case '': |
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break; |
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case '..': |
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$value = $value->getParent(); |
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break; |
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default: |
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if (!isset($value[$path])) { |
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throw new ReferenceException(sprintf('Undefined property: %s.', $this->path), $this->file, $this->line); |
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} |
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$value = $value[$path]; |
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} |
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} |
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if ($value instanceof Node) { |
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$value = $value->getNativeValue(); |
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} |
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$this->isResolving = false; |
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$this->isResolved = true; |
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$this->value = $value; |
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} |
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private function isAbsolute() |
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{ |
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return self::ROOT === substr($this->path, 0, 1); |
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} |
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} |
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Nuglif /
nacl
