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<?php
namespace Laminas\Config\Writer;
use Laminas\Config\Exception;
use function call_user_func;
use function function_exists;
use function is_callable;
class Yaml extends AbstractWriter
{
/**
* YAML encoder callback
*
* @var callable
*/
protected $yamlEncoder;
/**
* Constructor
*
* @param callable|string|null $yamlEncoder
*/
public function __construct($yamlEncoder = null)
{
if ($yamlEncoder !== null) {
$this->setYamlEncoder($yamlEncoder);
} else {
if (function_exists('yaml_emit')) {
$this->setYamlEncoder('yaml_emit');
}
}
}
/**
* Get callback for decoding YAML
*
* @return callable
*/
public function getYamlEncoder()
{
return $this->yamlEncoder;
}
/**
* Set callback for decoding YAML
*
* @param callable $yamlEncoder the decoder to set
* @return self
* @throws Exception\InvalidArgumentException
*/
public function setYamlEncoder($yamlEncoder)
{
if (! is_callable($yamlEncoder)) {
throw new Exception\InvalidArgumentException('Invalid parameter to setYamlEncoder() - must be callable');
}
$this->yamlEncoder = $yamlEncoder;
return $this;
}
/**
* processConfig(): defined by AbstractWriter.
*
* @param array $config
* @return string
* @throws Exception\RuntimeException
*/
public function processConfig(array $config)
{
if (null === $this->getYamlEncoder()) {
throw new Exception\RuntimeException("You didn't specify a Yaml callback encoder");
}
$config = call_user_func($this->getYamlEncoder(), $config);
if (null === $config) {
throw new Exception\RuntimeException("Error generating YAML data");
}
return $config;
}
}