160 lines
4.1 KiB
PHP
160 lines
4.1 KiB
PHP
<?php
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/**
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* Zend Framework (http://framework.zend.com/)
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*
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* @link http://github.com/zendframework/zf2 for the canonical source repository
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd 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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* YAML config reader.
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*/
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class Yaml implements ReaderInterface
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{
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/**
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* Directory of the YAML 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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* YAML decoder callback
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*
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* @var callable
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*/
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protected $yamlDecoder;
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/**
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* Constructor
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*
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* @param callable $yamlDecoder
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*/
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public function __construct($yamlDecoder = null)
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{
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if ($yamlDecoder !== null) {
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$this->setYamlDecoder($yamlDecoder);
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} else {
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if (function_exists('yaml_parse')) {
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$this->setYamlDecoder('yaml_parse');
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}
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}
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}
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/**
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* Set callback for decoding YAML
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*
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* @param string|callable $yamlDecoder the decoder to set
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* @return Yaml
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* @throws Exception\RuntimeException
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*/
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public function setYamlDecoder($yamlDecoder)
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{
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if (!is_callable($yamlDecoder)) {
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throw new Exception\RuntimeException(
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'Invalid parameter to setYamlDecoder() - must be callable'
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);
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}
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$this->yamlDecoder = $yamlDecoder;
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return $this;
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}
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/**
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* Get callback for decoding YAML
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*
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* @return callable
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*/
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public function getYamlDecoder()
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{
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return $this->yamlDecoder;
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}
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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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if (null === $this->getYamlDecoder()) {
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throw new Exception\RuntimeException("You didn't specify a Yaml callback decoder");
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}
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$this->directory = dirname($filename);
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$config = call_user_func($this->getYamlDecoder(), file_get_contents($filename));
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if (null === $config) {
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throw new Exception\RuntimeException("Error parsing YAML data");
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}
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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 (null === $this->getYamlDecoder()) {
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throw new Exception\RuntimeException("You didn't specify a Yaml callback decoder");
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}
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if (empty($string)) {
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return [];
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}
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$this->directory = null;
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$config = call_user_func($this->getYamlDecoder(), $string);
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if (null === $config) {
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throw new Exception\RuntimeException("Error parsing YAML data");
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}
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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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