ZwiiCampus/core/class/jsondb/JsonDb.class.php

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<?php
/**
* Created by PhpStorm.
* User: Andrey Mistulov
* Company: Aristos
* Date: 14.03.2017
* Time: 15:25
*/
namespace Prowebcraft;
/**
* Class Data
* @package Aristos
*/
class JsonDb extends \Prowebcraft\Dot
{
protected $db = '';
protected $data = null;
protected $config = [];
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// Tentative d'encodage après échec
const MAX_JSON_ENCODE_ATTEMPTS = 5;
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// Tentative d'écriture après échec
const MAX_FILE_WRITE_ATTEMPTS = 5;
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// Délais entre deux tentaives
const RETRY_DELAY_SECONDS = 1;
public function __construct($config = [])
{
$this->config = array_merge([
'name' => 'data.json',
'backup' => false,
'dir' => getcwd()
], $config);
$this->loadData();
parent::__construct();
}
/**
* Reload data from file
* @return $this
*/
public function reload()
{
$this->loadData(true);
return $this;
}
/**
* Set value or array of values to path
*
* @param mixed $key Path or array of paths and values
* @param mixed|null $value Value to set if path is not an array
* @param bool $save Save data to database
* @return $this
*/
public function set($key, $value = null, $save = true)
{
parent::set($key, $value);
if ($save)
$this->save();
return $this;
}
/**
* Add value or array of values to path
*
* @param mixed $key Path or array of paths and values
* @param mixed|null $value Value to set if path is not an array
* @param boolean $pop Helper to pop out last key if value is an array
* @param bool $save Save data to database
* @return $this
*/
public function add($key, $value = null, $pop = false, $save = true)
{
parent::add($key, $value, $pop);
if ($save)
$this->save();
return $this;
}
/**
* Delete path or array of paths
*
* @param mixed $key Path or array of paths to delete
* @param bool $save Save data to database
* @return $thisurn $this
*/
public function delete($key, $save = true)
{
parent::delete($key);
if ($save)
$this->save();
return $this;
}
/**
* Delete all data, data from path or array of paths and
* optionally format path if it doesn't exist
*
* @param mixed|null $key Path or array of paths to clean
* @param boolean $format Format option
* @param bool $save Save data to database
* @return $this
*/
public function clear($key = null, $format = false, $save = true)
{
parent::clear($key, $format);
if ($save)
$this->save();
return $this;
}
/**
* Local database upload
* @param bool $reload Reboot data?
* @return array|mixed|null
*/
protected function loadData($reload = false)
{
if ($this->data === null || $reload) {
$this->db = $this->config['dir'] . $this->config['name'];
if (!file_exists($this->db)) {
return null; // Rebuild database manage by CMS
} else {
if ($this->config['backup']) {
try {
copy($this->config['dir'] . DIRECTORY_SEPARATOR . $this->config['name'], $this->config['dir'] . DIRECTORY_SEPARATOR . $this->config['name'] . '.backup');
} catch (\Exception $e) {
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error_log('Erreur de chargement : ' . $e);
exit('Erreur de chargement : ' . $e);
}
}
}
$this->data = json_decode(file_get_contents($this->db), true);
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if (!$this->data === null) {
throw new \InvalidArgumentException('Database file ' . $this->db
. ' contains invalid json object. Please validate or remove file');
}
}
return $this->data;
}
/**
* Save database
*/
public function save()
{
$jsonOptions = JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT | JSON_FORCE_OBJECT;
$jsonData = json_encode($this->data, $jsonOptions);
$attempts = 0;
while ($attempts < self::MAX_JSON_ENCODE_ATTEMPTS) {
if ($jsonData !== false) {
break; // Sortir de la boucle si l'encodage réussit
}
$attempts++;
error_log('Erreur d\'encodage JSON (tentative ' . $attempts . ') : ' . json_last_error_msg());
$jsonData = json_encode($this->data, $jsonOptions); // Réessayer l'encodage
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sleep(self::RETRY_DELAY_SECONDS); // Attendre avant de réessayer
}
if ($jsonData === false) {
error_log('Impossible d\'encoder les données en format JSON.');
return false;
}
$lockHandle = fopen($this->db, 'r+');
if (flock($lockHandle, LOCK_EX)) {
$attempts = 0;
$bytesWritten = false;
while ($attempts < self::MAX_FILE_WRITE_ATTEMPTS && $bytesWritten === false) {
ftruncate($lockHandle, 0); // Vide le fichier
rewind($lockHandle); // Remet le pointeur au début du fichier
$bytesWritten = fwrite($lockHandle, $jsonData);
if ($bytesWritten === false) {
$attempts++;
error_log('Erreur d\'écriture (tentative ' . $attempts . ') : impossible de sauvegarder les données.');
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sleep(self::RETRY_DELAY_SECONDS); // Attendre avant de réessayer
}
}
flock($lockHandle, LOCK_UN); // Libérer le verrouillage
fclose($lockHandle); // Fermer le fichier
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if ($bytesWritten === false || $bytesWritten != strlen($jsonData)) {
error_log('Erreur d\'écriture, les données n\'ont pas été sauvegardées.');
return false;
}
} else {
error_log('Impossible d\'obtenir un verrouillage sur le fichier de base de données.');
fclose($lockHandle); // Fermer le fichier
return false;
}
return true;
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}
}