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<?php |
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/** |
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* This file is part of tenside/core. |
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* |
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* (c) Christian Schiffler <[email protected]> |
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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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* This project is provided in good faith and hope to be usable by anyone. |
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* |
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* @package tenside/core |
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* @author Christian Schiffler <[email protected]> |
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* @author Andreas Schempp <[email protected]> |
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* @copyright 2015 Christian Schiffler <[email protected]> |
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* @license https://github.com/tenside/core/blob/master/LICENSE MIT |
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* @link https://github.com/tenside/core |
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* @filesource |
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*/ |
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namespace Tenside\Core\Util; |
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/** |
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* Generic path following json file handler. |
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* |
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* @SuppressWarnings(PHPMD.TooManyPublicMethods) |
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*/ |
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class JsonArray implements \JsonSerializable |
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{ |
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/** |
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* The json data. |
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* |
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* @var array |
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*/ |
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private $data; |
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/** |
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* Create a new instance. |
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* |
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* @param string|array $data The json data. |
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*/ |
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public function __construct($data = '{}') |
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{ |
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if (is_string($data)) { |
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$this->load($data); |
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} elseif (is_array($data)) { |
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$this->setData($data); |
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} |
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} |
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/** |
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* Set the data. |
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* |
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* @param array $data The data array. |
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* |
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* @return JsonArray |
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*/ |
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public function setData($data) |
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{ |
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$this->data = (array) $data; |
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return $this; |
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} |
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/** |
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* Merge the passed data into this instance. |
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* |
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* @param array $data The data to absorb. |
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* |
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* @return JsonArray |
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*/ |
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public function merge($data) |
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{ |
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return $this->setData(array_replace_recursive($this->getData(), (array) $data)); |
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} |
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/** |
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* Retrieve the data as array. |
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* |
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* @return array |
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*/ |
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public function getData() |
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{ |
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return $this->data; |
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} |
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/** |
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* Load the data. |
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* |
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* @param string $data The json data. |
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* |
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* @return JsonArray |
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* |
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* @throws \RuntimeException When the data is invalid. |
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*/ |
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public function load($data) |
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{ |
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$data = json_decode($data, true); |
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if (JSON_ERROR_NONE !== json_last_error()) { |
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throw new \RuntimeException('Error: json decode failed. ' . json_last_error_msg(), 1); |
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} |
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$this->setData($data); |
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return $this; |
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} |
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/** |
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* Split the path into chunks. |
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* |
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* @param string $path The path to split. |
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* |
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* @return array |
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* |
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* @throws \InvalidArgumentException When the path is invalid. |
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*/ |
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protected function splitPath($path) |
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{ |
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$chunks = array_map( |
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[$this, 'unescape'], |
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preg_split('#(?<!\\\)\/#', ltrim($path, '/')) |
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); |
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if (empty($chunks) || (array_filter($chunks) !== $chunks)) { |
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throw new \InvalidArgumentException('Invalid path provided:' . $path); |
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} |
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return $chunks; |
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} |
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/** |
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* Escape a string to be used as literal path. |
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* |
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* @param string $path The string to escape. |
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* |
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* @return string |
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*/ |
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public function unescape($path) |
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{ |
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return str_replace('\/', '/', $path); |
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} |
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/** |
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* Escape a string to be used as literal path. |
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* |
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* @param string $path The string to escape. |
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* |
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* @return string |
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*/ |
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public function escape($path) |
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{ |
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return str_replace('/', '\/', $path); |
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} |
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/** |
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* Retrieve a value. |
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* |
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* @param string $path The path of the value. |
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* |
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* @param bool $forceArray Flag if the result shall be casted to array. |
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* |
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* @return array|string|int|null |
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*/ |
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public function get($path, $forceArray = false) |
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{ |
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// special case, root element. |
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if ($path === '/') { |
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return $this->data; |
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} |
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$chunks = $this->splitPath($path); |
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$scope = $this->data; |
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while (null !== ($sub = array_shift($chunks))) { |
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if (isset($scope[$sub])) { |
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if ($forceArray) { |
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$scope = (array) $scope[$sub]; |
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} else { |
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$scope = $scope[$sub]; |
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} |
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} else { |
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if ($forceArray) { |
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return []; |
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} else { |
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return null; |
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} |
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} |
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} |
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return $scope; |
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} |
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/** |
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* Set a value. |
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* |
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* @param string $path The path of the value. |
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* |
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* @param mixed $value The value to set. |
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* |
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* @return JsonArray |
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*/ |
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public function set($path, $value) |
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{ |
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// special case, root element. |
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if ($path === '/') { |
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$this->data = (array) $value; |
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return $this; |
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} |
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$chunks = $this->splitPath($path); |
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$scope = &$this->data; |
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$count = count($chunks); |
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while ($count > 1) { |
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$sub = array_shift($chunks); |
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$count = count($chunks); |
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if ((!(isset($scope[$sub]) && is_array($scope[$sub])))) { |
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$scope[$sub] = []; |
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} |
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$scope = &$scope[$sub]; |
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} |
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$sub = $chunks[0]; |
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if ($value === null) { |
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unset($scope[$sub]); |
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return $this; |
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} |
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$scope[$sub] = $value; |
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return $this; |
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} |
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/** |
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* Check if a value exists. |
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* |
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* @param string $path The path of the value. |
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* |
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* @return bool |
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*/ |
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public function has($path) |
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{ |
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$chunks = $this->splitPath($path); |
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$scope = $this->data; |
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while (null !== ($sub = array_shift($chunks))) { |
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if (isset($scope[$sub])) { |
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$scope = $scope[$sub]; |
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} else { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Unset a value. |
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* |
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* @param string $path The path of the value. |
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* |
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* @return JsonArray |
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*/ |
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public function remove($path) |
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{ |
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return $this->set($path, null); |
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} |
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/** |
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* Check if a given path has an empty value (or does not exist). |
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* |
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* @param string $path The sub path to be sorted. |
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* |
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* @return bool |
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*/ |
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public function isEmpty($path) |
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{ |
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return (null === ($value = $this->get($path))) || empty($value); |
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} |
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/** |
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* Retrieve the contained keys at the given path. |
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* |
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* @param string $path The sub path to be examined. |
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* |
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* @return string[] |
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*/ |
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public function getEntries($path) |
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{ |
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$entries = $this->get($path); |
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$result = []; |
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$prefix = trim($path, '/'); |
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if (strlen($prefix)) { |
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$prefix .= '/'; |
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} |
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if (is_array($entries)) { |
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foreach (array_keys($entries) as $key) { |
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$result[] = $prefix . $this->escape($key); |
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} |
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} |
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return $result; |
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} |
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/** |
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* Sort the array by the provided user function. |
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* |
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* @param callable $callback The callback function to use. |
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* |
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* @param string $path The sub path to be sorted. |
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* |
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* @return void |
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*/ |
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public function uasort($callback, $path = '/') |
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{ |
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$value = $this->get($path); |
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if (null === $value || !is_array($value)) { |
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return; |
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} |
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uasort($value, $callback); |
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$this->set($path, $value); |
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} |
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/** |
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* Encode the array as string and return it. |
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* |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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// Do not use PHP_EOL here, PHP only uses newline and not crlf on Windows. |
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return json_encode($this, (JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES)) . "\n"; |
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} |
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/** |
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* Return the data which should be serialized to JSON. |
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* |
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* @return object |
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*/ |
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public function jsonSerialize() |
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{ |
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return (object) $this->data; |
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} |
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} |
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