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<?php

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/**

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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)

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* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)

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* Licensed under The MIT License

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* For full copyright and license information, please see the LICENSE.txt

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* Redistributions of files must retain the above copyright notice.

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* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)

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* @link https://cakephp.org CakePHP(tm) Project

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* @since 3.0.0

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* @license https://opensource.org/licenses/mit-license.php MIT License

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namespace Cake\Core\Configure\Engine;

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use Cake\Core\Configure\ConfigEngineInterface;

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use Cake\Core\Configure\FileConfigTrait;

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use Cake\Core\Exception\Exception;

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/**

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* JSON engine allows Configure to load configuration values from

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* files containing JSON strings.

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* An example JSON file would look like::

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* ```

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* {

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* "debug": false,

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* "App": {

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* "namespace": "MyApp"

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* },

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* "Security": {

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* "salt": "its-secret"

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* }

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* }

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* ```

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class JsonConfig implements ConfigEngineInterface

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{

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use FileConfigTrait;

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/**

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* File extension.

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* @var string

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protected $_extension = '.json';

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/**

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* Constructor for JSON Config file reading.

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* @param string|null $path The path to read config files from. Defaults to CONFIG.

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public function __construct($path = null)

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{

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if ($path === null) {

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$path = CONFIG;

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}

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$this->_path = $path;

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}

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/**

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* Read a config file and return its contents.

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* Files with `.` in the name will be treated as values in plugins. Instead of

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* reading from the initialized path, plugin keys will be located using Plugin::path().

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* @param string $key The identifier to read from. If the key has a . it will be treated

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* as a plugin prefix.

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* @return array Parsed configuration values.

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* @throws \Cake\Core\Exception\Exception When files don't exist or when

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* files contain '..' (as this could lead to abusive reads) or when there

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* is an error parsing the JSON string.

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public function read($key)

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{

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$file = $this->_getFilePath($key, true);

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$values = json_decode(file_get_contents($file), true);

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if (json_last_error() !== JSON_ERROR_NONE) {

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throw new Exception(sprintf(

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'Error parsing JSON string fetched from config file "%s.json": %s',

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$key,

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json_last_error_msg()

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));

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}

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if (!is_array($values)) {

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throw new Exception(sprintf(

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'Decoding JSON config file "%s.json" did not return an array',

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$key

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));

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}

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return $values;

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}

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/**

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* Converts the provided $data into a JSON string that can be used saved

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* into a file and loaded later.

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* @param string $key The identifier to write to. If the key has a . it will

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* be treated as a plugin prefix.

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* @param array $data Data to dump.

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* @return bool Success

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public function dump($key, array $data)

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{

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$filename = $this->_getFilePath($key);

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return file_put_contents($filename, json_encode($data, JSON_PRETTY_PRINT)) > 0;

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}

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}

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