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<?php |
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declare(strict_types=1); |
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namespace gamringer\JSONPointer; |
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use gamringer\JSONPointer\Access\Accesses; |
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use gamringer\JSONPointer\Access\ArrayAccessor; |
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use gamringer\JSONPointer\Access\ObjectAccessor; |
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use gamringer\JSONPointer\Exception; |
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class Pointer |
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{ |
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private $target; |
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private $accessorCollection; |
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public function __construct(&...$targets) |
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{ |
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$target = new VoidValue(); |
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if (!empty($targets)) { |
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$target = &$targets[0]; |
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} |
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$this->setTarget($target); |
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$this->accessorCollection = new AccessorCollection(); |
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} |
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public function getAccessorCollection(): AccessorCollection |
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{ |
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return $this->accessorCollection; |
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} |
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public function setTarget(&$target) |
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{ |
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$this->target = &$target; |
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} |
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public function getTarget() |
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{ |
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return $this->target; |
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} |
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public function has(string $path) |
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{ |
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try { |
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$this->reference($path)->hasValue(); |
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} catch (Exception $e) { |
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return false; |
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} |
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return true; |
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} |
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public function get(string $path) |
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{ |
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return $this->reference($path)->getValue(); |
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} |
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public function set(string $path, &$value) |
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{ |
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return $this->reference($path)->setValue($value); |
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} |
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public function insert(string $path, &$value) |
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{ |
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return $this->reference($path)->insertValue($value); |
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} |
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public function remove(string $path) |
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{ |
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return $this->reference($path)->unsetValue(); |
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} |
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private function reference(string $path): ReferencedValue |
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{ |
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$path = $this->getCleanPath($path); |
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if (empty($path)) { |
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return new ReferencedValue($this->target); |
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} |
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$this->assertTarget(); |
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return $this->walk($path); |
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} |
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private function unescape(string $token): string |
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{ |
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$token = (string) $token; |
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if (preg_match('/~[^01]/', $token)) { |
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throw new Exception('Invalid pointer syntax'); |
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} |
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$token = str_replace('~1', '/', $token); |
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$token = str_replace('~0', '~', $token); |
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return $token; |
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} |
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private function getCleanPath(string $path): string |
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{ |
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$path = (string) $path; |
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$path = $this->getRepresentedPath($path); |
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if (!empty($path) && $path[0] !== '/') { |
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throw new Exception('Invalid pointer syntax'); |
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} |
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return $path; |
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} |
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private function getRepresentedPath(string $path): string |
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{ |
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if (substr($path, 0, 1) === '#') { |
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return urldecode(substr($path, 1)); |
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} |
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return stripslashes($path); |
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} |
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private function walk(string $path): ReferencedValue |
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{ |
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$target = &$this->target; |
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$tokens = explode('/', substr($path, 1)); |
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$accessor = null; |
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while (($token = array_shift($tokens)) !== null) { |
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$accessor = $this->accessorCollection->getAccessorFor($target); |
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$token = $this->unescape($token); |
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if (empty($tokens)) { |
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break; |
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} |
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$target = &$this->fetchTokenTargetFrom($target, $token, $accessor); |
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} |
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return new ReferencedValue($target, $token, $accessor); |
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} |
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private function &fetchTokenTargetFrom(&$target, string $token, Accesses $accessor) |
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{ |
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$result = &$accessor->getValue($target, $token); |
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return $result; |
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} |
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private function assertTarget() |
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{ |
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if ($this->target instanceof VoidValue) { |
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throw new Exception('No target defined'); |
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} |
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} |
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} |
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gamringer /
JSONPointer
