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<?php
/**
* Class ConfigJson (ConfigIO implementation)
*
* Handle Shaarli's JSON configuration file.
*/
class ConfigJson implements ConfigIO
{
/**
* 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.
*
* @var string PHP start tag and comment tag.
*/
public static $PHP_HEADER;
public function __construct()
{
// The field can't be initialized directly with concatenation before PHP 5.6.
self::$PHP_HEADER = '<?php /*'. PHP_EOL;
}
/**
* @inheritdoc
*/
function read($filepath)
{
if (! file_exists($filepath) || ! is_readable($filepath)) {
return array();
}
$data = file_get_contents($filepath);
$data = str_replace(self::$PHP_HEADER, '', $data);
$data = json_decode($data, true);
if ($data === null) {
$error = json_last_error();
throw new Exception('An error occured while parsing JSON file: error code #'. $error);
}
return $data;
}
/**
* @inheritdoc
*/
function write($filepath, $conf)
{
// JSON_PRETTY_PRINT is available from PHP 5.4.
$print = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
$data = self::$PHP_HEADER . json_encode($conf, $print);
if (!file_put_contents($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
*/
function getExtension()
{
return '.json.php';
}
}
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