friendica/src/Core/Config/PreloadPConfiguration.php

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2019-07-15 20:13:53 +02:00
<?php
namespace Friendica\Core\Config;
use Friendica\Model;
/**
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* This class implements the preload configuration, which will cache
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* all user config values per call in a cache.
*
* Minimizes the number of database queries to retrieve configuration values at the cost of memory.
*/
class PreloadPConfiguration extends PConfiguration
{
/** @var array */
private $config_loaded;
/**
* @param Cache\PConfigCache $configCache The configuration cache
* @param Model\Config\PConfig $configModel The configuration model
*/
public function __construct(Cache\PConfigCache $configCache, Model\Config\PConfig $configModel)
{
parent::__construct($configCache, $configModel);
$this->config_loaded = [];
}
/**
* {@inheritDoc}
*
* This loads all config values everytime load is called
*
*/
public function load(int $uid, string $cat = 'config')
{
// Don't load the whole configuration twice
if (!empty($this->config_loaded[$uid])) {
return;
}
// If not connected, do nothing
if (!$this->configModel->isConnected()) {
return;
}
$config = $this->configModel->load($uid);
$this->config_loaded[$uid] = true;
// load the whole category out of the DB into the cache
$this->configCache->load($uid, $config);
}
/**
* {@inheritDoc}
*/
public function get(int $uid, string $cat, string $key, $default_value = null, bool $refresh = false)
{
if (empty($this->config_loaded[$uid])) {
$this->load($uid);
} elseif ($refresh) {
if ($this->configModel->isConnected()) {
$config = $this->configModel->get($uid, $cat, $key);
if (isset($config)) {
$this->configCache->set($uid, $cat, $key, $config);
}
}
}
// use the config cache for return
$result = $this->configCache->get($uid, $cat, $key);
return (isset($result)) ? $result : $default_value;
}
/**
* {@inheritDoc}
*/
public function set(int $uid, string $cat, string $key, $value)
{
if (empty($this->config_loaded[$uid])) {
$this->load($uid);
}
// set the cache first
$cached = $this->configCache->set($uid, $cat, $key, $value);
// If there is no connected adapter, we're finished
if (!$this->configModel->isConnected()) {
return $cached;
}
$stored = $this->configModel->set($uid, $cat, $key, $value);
return $cached && $stored;
}
/**
* {@inheritDoc}
*/
public function delete(int $uid, string $cat, string $key)
{
if (empty($this->config_loaded[$uid])) {
$this->load($uid);
}
$cacheRemoved = $this->configCache->delete($uid, $cat, $key);
if (!$this->configModel->isConnected()) {
return $cacheRemoved;
}
$storeRemoved = $this->configModel->delete($uid, $cat, $key);
return $cacheRemoved || $storeRemoved;
}
}