mirror of https://github.com/friendica/friendica
163 lines
3.6 KiB
PHP
163 lines
3.6 KiB
PHP
<?php
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namespace Friendica\Core\Config;
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use dba;
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use Exception;
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use Friendica\App;
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use Friendica\BaseObject;
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use Friendica\Database\DBM;
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require_once 'include/dba.php';
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/**
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* Preload ConfigAdapter
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*
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* Minimize the number of database queries to retrieve configuration values at the cost of memory.
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*
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* @author Hypolite Petovan <mrpetovan@gmail.com>
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*/
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class PreloadConfigAdapter extends BaseObject implements IConfigAdapter
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{
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private $config_loaded = false;
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public function __construct()
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{
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$this->load();
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}
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public function load($family = 'config')
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{
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if ($this->config_loaded) {
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return;
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}
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$configs = dba::select('config', ['cat', 'v', 'k']);
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while ($config = dba::fetch($configs)) {
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$this->setPreloadedValue($config['cat'], $config['k'], $config['v']);
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}
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dba::close($configs);
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$this->config_loaded = true;
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}
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public function get($cat, $k, $default_value = null, $refresh = false)
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{
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if ($refresh) {
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$config = dba::selectFirst('config', ['v'], ['cat' => $cat, 'k' => $k]);
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if (DBM::is_result($config)) {
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$this->setPreloadedValue($cat, $k, $config['v']);
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} else {
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$this->deletePreloadedValue($cat, $k);
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}
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}
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$return = $this->getPreloadedValue($cat, $k, $default_value);
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return $return;
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}
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public function set($cat, $k, $value)
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{
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// We store our setting values as strings.
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// So we have to do the conversion here so that the compare below works.
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// The exception are array values.
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$compare_value = !is_array($value) ? (string)$value : $value;
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if ($this->getPreloadedValue($cat, $k) === $compare_value) {
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return true;
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}
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$this->setPreloadedValue($cat, $k, $value);
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// manage array value
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$dbvalue = is_array($value) ? serialize($value) : $value;
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$result = dba::update('config', ['v' => $dbvalue], ['cat' => $cat, 'k' => $k], true);
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if (!$result) {
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throw new Exception('Unable to store config value in [' . $cat . '][' . $k . ']');
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}
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return true;
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}
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public function delete($cat, $k)
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{
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$this->deletePreloadedValue($cat, $k);
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$result = dba::delete('config', ['cat' => $cat, 'k' => $k]);
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return $result;
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}
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/**
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* Retrieves a preloaded value from the App config cache
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*
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* @param string $cat
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* @param string $k
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* @param mixed $default
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*/
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private function getPreloadedValue($cat, $k, $default = null)
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{
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$a = self::getApp();
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$return = $default;
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if ($cat === 'config') {
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if (isset($a->config[$k])) {
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$return = $a->config[$k];
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}
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} else {
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if (isset($a->config[$cat][$k])) {
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$return = $a->config[$cat][$k];
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}
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}
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return $return;
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}
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/**
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* Sets a preloaded value in the App config cache
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*
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* Accepts raw output from the config table
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*
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* @param string $cat
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* @param string $k
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* @param mixed $v
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*/
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private function setPreloadedValue($cat, $k, $v)
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{
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$a = self::getApp();
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// Only arrays are serialized in database, so we have to unserialize sparingly
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$value = is_string($v) && preg_match("|^a:[0-9]+:{.*}$|s", $v) ? unserialize($v) : $v;
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if ($cat === 'config') {
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$a->config[$k] = $value;
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} else {
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$a->config[$cat][$k] = $value;
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}
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}
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/**
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* Deletes a preloaded value from the App config cache
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*
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* @param string $cat
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* @param string $k
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*/
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private function deletePreloadedValue($cat, $k)
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{
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$a = self::getApp();
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if ($cat === 'config') {
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if (isset($a->config[$k])) {
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unset($a->config[$k]);
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}
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} else {
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if (isset($a->config[$cat][$k])) {
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unset($a->config[$cat][$k]);
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}
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}
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}
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}
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