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<?php
namespace Shaarli\Config;
/**
* Class ConfigJson (ConfigIO implementation)
*
* Handle Shaarli's JSON configuration file.
*/
class ConfigJson implements ConfigIO
{
/**
* @inheritdoc
*/
public function read($filepath)
{
if (! is_readable($filepath)) {
return array();
}
$data = file_get_contents($filepath);
$data = str_replace(self::getPhpHeaders(), '', $data);
$data = str_replace(self::getPhpSuffix(), '', $data);
$data = json_decode($data, true);
if ($data === null) {
$error = json_last_error();
throw new \Exception('An error occurred while parsing JSON file: error code #'. $error);
}
return $data;
}
/**
* @inheritdoc
*/
public function write($filepath, $conf)
{
// JSON_PRETTY_PRINT is available from PHP 5.4.
$print = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
$data = self::getPhpHeaders() . json_encode($conf, $print) . self::getPhpSuffix();
if (!file_put_contents($filepath, $data)) {
throw new \IOException(
$filepath,
'Shaarli could not create the config file.
Please make sure Shaarli has the right to write in the folder is it installed in.'
);
}
}
/**
* @inheritdoc
*/
public function getExtension()
{
return '.json.php';
}
/**
* The JSON data is wrapped in a PHP file for security purpose.
* This way, even if the file is accessible, credentials and configuration won't be exposed.
*
* Note: this isn't a static field because concatenation isn't supported in field declaration before PHP 5.6.
*
* @return string PHP start tag and comment tag.
*/
public static function getPhpHeaders()
{
return '<?php /*'. PHP_EOL;
}
/**
* Get PHP comment closing tags.
*
* Static method for consistency with getPhpHeaders.
*
* @return string PHP comment closing.
*/
public static function getPhpSuffix()
{
return PHP_EOL . '*/ ?>';
}
}
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