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Yaml.php
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Yaml.php
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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @package Zend_Config
*/
namespace Zend\Config\Reader;
use Zend\Config\Exception;
/**
* YAML config reader.
*
* @category Zend
* @package Zend_Config
* @subpackage Reader
*/
class Yaml implements ReaderInterface
{
/**
* Directory of the YAML file
*
* @var string
*/
protected $directory;
/**
* YAML decoder callback
*
* @var callable
*/
protected $yamlDecoder;
/**
* Constructor
*
* @param callable $yamlDecoder
*/
public function __construct($yamlDecoder = null)
{
if ($yamlDecoder !== null) {
$this->setYamlDecoder($yamlDecoder);
} else {
if (function_exists('yaml_parse')) {
$this->setYamlDecoder('yaml_parse');
}
}
}
/**
* Set callback for decoding YAML
*
* @param string|callable $yamlDecoder the decoder to set
* @return Yaml
* @throws Exception\InvalidArgumentException
*/
public function setYamlDecoder($yamlDecoder)
{
if (!is_callable($yamlDecoder)) {
throw new Exception\RuntimeException(
'Invalid parameter to setYamlDecoder() - must be callable'
);
}
$this->yamlDecoder = $yamlDecoder;
return $this;
}
/**
* Get callback for decoding YAML
*
* @return callable
*/
public function getYamlDecoder()
{
return $this->yamlDecoder;
}
/**
* fromFile(): defined by Reader interface.
*
* @see ReaderInterface::fromFile()
* @param string $filename
* @return array
* @throws Exception\RuntimeException
*/
public function fromFile($filename)
{
if (!is_file($filename) || !is_readable($filename)) {
throw new Exception\RuntimeException(sprintf(
"File '%s' doesn't exist or not readable",
$filename
));
}
if (null === $this->getYamlDecoder()) {
throw new Exception\RuntimeException("You didn't specify a Yaml callback decoder");
}
$this->directory = dirname($filename);
$config = call_user_func($this->getYamlDecoder(), file_get_contents($filename));
if (null === $config) {
throw new Exception\RuntimeException("Error parsing YAML data");
}
return $this->process($config);
}
/**
* fromString(): defined by Reader interface.
*
* @see ReaderInterface::fromString()
* @param string $string
* @return array|bool
* @throws Exception\RuntimeException
*/
public function fromString($string)
{
if (null === $this->getYamlDecoder()) {
throw new Exception\RuntimeException("You didn't specify a Yaml callback decoder");
}
if (empty($string)) {
return array();
}
$this->directory = null;
$config = call_user_func($this->getYamlDecoder(), $string);
if (null === $config) {
throw new Exception\RuntimeException("Error parsing YAML data");
}
return $this->process($config);
}
/**
* Process the array for @include
*
* @param array $data
* @return array
* @throws Exception\RuntimeException
*/
protected function process(array $data)
{
foreach ($data as $key => $value) {
if (is_array($value)) {
$data[$key] = $this->process($value);
}
if (trim($key) === '@include') {
if ($this->directory === null) {
throw new Exception\RuntimeException('Cannot process @include statement for a json string');
}
$reader = clone $this;
unset($data[$key]);
$data = array_replace_recursive($data, $reader->fromFile($this->directory . '/' . $value));
}
}
return $data;
}
}