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<?php
namespace Laminas\Config\Reader;
use Laminas\Config\Exception;
use function array_replace_recursive;
use function dirname;
use function file_get_contents;
use function is_array;
use function is_file;
use function is_readable;
use function json_decode;
use function json_last_error;
use function json_last_error_msg;
use function sprintf;
use function trim;
use const JSON_ERROR_NONE;
/**
* JSON config reader.
*/
class Json implements ReaderInterface
{
/**
* Directory of the JSON file
*
* @var string
*/
protected $directory;
/**
* 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
));
}
$this->directory = dirname($filename);
$config = $this->decode(file_get_contents($filename));
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 (empty($string)) {
return [];
}
$this->directory = null;
$config = $this->decode($string);
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;
}
/**
* Decode JSON configuration.
*
* Determines if ext/json is present, and, if so, uses that to decode the
* configuration. Otherwise, it uses laminas-json, and, if that is missing,
* raises an exception indicating inability to decode.
*
* @param string $data
* @return array
* @throws Exception\RuntimeException For any decoding errors.
*/
private function decode($data)
{
$config = json_decode($data, true);
if (null !== $config && ! is_array($config)) {
throw new Exception\RuntimeException(
'Invalid JSON configuration; did not return an array or object'
);
}
if (null !== $config) {
return $config;
}
if (JSON_ERROR_NONE === json_last_error()) {
return $config;
}
throw new Exception\RuntimeException(json_last_error_msg());
}
}