friendica/src/Core/Config/PreloadConfiguration.php

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<?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 config values per call in a cache.
*
* Minimizes the number of database queries to retrieve configuration values at the cost of memory.
*/
class PreloadConfiguration extends Configuration
{
/** @var bool */
private $config_loaded;
/**
* @param Cache\ConfigCache $configCache The configuration cache (based on the config-files)
* @param Model\Config\Config $configModel The configuration model
*/
public function __construct(Cache\ConfigCache $configCache, Model\Config\Config $configModel)
{
parent::__construct($configCache, $configModel);
$this->config_loaded = false;
$this->load();
}
/**
* {@inheritDoc}
*
* This loads all config values everytime load is called
*
*/
public function load(string $cat = 'config')
{
// Don't load the whole configuration twice
if ($this->config_loaded) {
return;
}
// If not connected, do nothing
if (!$this->configModel->isConnected()) {
return;
}
$config = $this->configModel->load();
$this->config_loaded = true;
// load the whole category out of the DB into the cache
$this->configCache->load($config, true);
}
/**
* {@inheritDoc}
*/
public function get(string $cat, string $key, $default_value = null, bool $refresh = false)
{
if ($refresh) {
if ($this->configModel->isConnected()) {
$config = $this->configModel->get($cat, $key);
if (isset($config)) {
$this->configCache->set($cat, $key, $config);
}
}
}
// use the config cache for return
$result = $this->configCache->get($cat, $key);
return (isset($result)) ? $result : $default_value;
}
/**
* {@inheritDoc}
*/
public function set(string $cat, string $key, $value)
{
if (!$this->config_loaded) {
$this->load();
}
// set the cache first
$cached = $this->configCache->set($cat, $key, $value);
// If there is no connected adapter, we're finished
if (!$this->configModel->isConnected()) {
return $cached;
}
$stored = $this->configModel->set($cat, $key, $value);
return $cached && $stored;
}
/**
* {@inheritDoc}
*/
public function delete(string $cat, string $key)
{
if ($this->config_loaded) {
$this->load();
}
$cacheRemoved = $this->configCache->delete($cat, $key);
if (!$this->configModel->isConnected()) {
return $cacheRemoved;
}
$storeRemoved = $this->configModel->delete($cat, $key);
return $cacheRemoved || $storeRemoved;
}
}