friendica/src/Core/Config/PreloadPConfigAdapter.php

114 lines
2.6 KiB
PHP

<?php
namespace Friendica\Core\Config;
use Exception;
use Friendica\Database\DBA;
/**
* Preload User Configuration Adapter
*
* Minimizes the number of database queries to retrieve configuration values at the cost of memory.
*
* @author Hypolite Petovan <hypolite@mrpetovan.com>
*/
class PreloadPConfigAdapter implements IPConfigAdapter
{
private $config_loaded = false;
/**
* The config cache of this adapter
* @var IPConfigCache
*/
private $config;
/**
* @param IPConfigCache $config The config cache of this adapter
* @param int $uid The UID of the current user
*/
public function __construct($config, $uid = null)
{
$this->config = $config;
if (isset($uid)) {
$this->load($uid, 'config');
}
}
public function load($uid, $family)
{
if ($this->config_loaded) {
return;
}
if (empty($uid)) {
return;
}
$pconfigs = DBA::select('pconfig', ['cat', 'v', 'k'], ['uid' => $uid]);
while ($pconfig = DBA::fetch($pconfigs)) {
$this->config->setP($uid, $pconfig['cat'], $pconfig['k'], $pconfig['v']);
}
DBA::close($pconfigs);
$this->config_loaded = true;
}
public function get($uid, $cat, $k, $default_value = null, $refresh = false)
{
if (!$this->config_loaded) {
$this->load($uid, $cat);
}
if ($refresh) {
$config = DBA::selectFirst('pconfig', ['v'], ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
if (DBA::isResult($config)) {
$this->config->setP($uid, $cat, $k, $config['v']);
} else {
$this->config->deleteP($uid, $cat, $k);
}
}
return $this->config->getP($uid, $cat, $k, $default_value);;
}
public function set($uid, $cat, $k, $value)
{
if (!$this->config_loaded) {
$this->load($uid, $cat);
}
// We store our setting values as strings.
// So we have to do the conversion here so that the compare below works.
// The exception are array values.
$compare_value = !is_array($value) ? (string)$value : $value;
if ($this->config->getP($uid, $cat, $k) === $compare_value) {
return true;
}
$this->config->setP($uid, $cat, $k, $value);
// manage array value
$dbvalue = is_array($value) ? serialize($value) : $value;
$result = DBA::update('pconfig', ['v' => $dbvalue], ['uid' => $uid, 'cat' => $cat, 'k' => $k], true);
if (!$result) {
throw new Exception('Unable to store config value in [' . $uid . '][' . $cat . '][' . $k . ']');
}
return true;
}
public function delete($uid, $cat, $k)
{
if (!$this->config_loaded) {
$this->load($uid, $cat);
}
$this->config->deleteP($uid, $cat, $k);
$result = DBA::delete('pconfig', ['uid' => $uid, 'cat' => $cat, 'k' => $k]);
return $result;
}
}