126 lines
3.3 KiB
PHP
126 lines
3.3 KiB
PHP
<?php
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/**
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* @see https://github.com/zendframework/zend-config for the canonical source repository
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* @copyright Copyright (c) 2005-2017 Zend Technologies USA Inc. (http://www.zend.com)
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* @license https://github.com/zendframework/zend-config/blob/master/LICENSE.md New BSD License
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*/
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namespace Zend\Config\Reader;
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use Zend\Config\Exception;
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/**
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* JSON config reader.
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*/
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class Json implements ReaderInterface
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{
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/**
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* Directory of the JSON file
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*
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* @var string
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*/
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protected $directory;
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/**
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* fromFile(): defined by Reader interface.
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*
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* @see ReaderInterface::fromFile()
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* @param string $filename
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* @return array
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* @throws Exception\RuntimeException
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*/
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public function fromFile($filename)
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{
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if (! is_file($filename) || ! is_readable($filename)) {
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throw new Exception\RuntimeException(sprintf(
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"File '%s' doesn't exist or not readable",
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$filename
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));
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}
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$this->directory = dirname($filename);
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$config = $this->decode(file_get_contents($filename));
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return $this->process($config);
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}
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/**
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* fromString(): defined by Reader interface.
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*
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* @see ReaderInterface::fromString()
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* @param string $string
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* @return array|bool
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* @throws Exception\RuntimeException
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*/
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public function fromString($string)
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{
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if (empty($string)) {
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return [];
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}
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$this->directory = null;
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$config = $this->decode($string);
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return $this->process($config);
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}
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/**
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* Process the array for @include
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*
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* @param array $data
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* @return array
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* @throws Exception\RuntimeException
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*/
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protected function process(array $data)
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{
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foreach ($data as $key => $value) {
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if (is_array($value)) {
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$data[$key] = $this->process($value);
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}
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if (trim($key) === '@include') {
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if ($this->directory === null) {
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throw new Exception\RuntimeException('Cannot process @include statement for a JSON string');
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}
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$reader = clone $this;
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unset($data[$key]);
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$data = array_replace_recursive($data, $reader->fromFile($this->directory . '/' . $value));
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}
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}
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return $data;
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}
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/**
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* Decode JSON configuration.
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*
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* Determines if ext/json is present, and, if so, uses that to decode the
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* configuration. Otherwise, it uses zend-json, and, if that is missing,
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* raises an exception indicating inability to decode.
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*
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* @param string $data
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* @return array
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* @throws Exception\RuntimeException for any decoding errors.
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*/
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private function decode($data)
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{
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$config = json_decode($data, true);
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if (null !== $config && ! is_array($config)) {
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throw new Exception\RuntimeException(
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'Invalid JSON configuration; did not return an array or object'
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);
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}
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if (null !== $config) {
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return $config;
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}
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if (JSON_ERROR_NONE === json_last_error()) {
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return $config;
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}
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throw new Exception\RuntimeException(json_last_error_msg());
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}
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}
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