<?php
namespace Friendica\Core;
+
+use dbm;
+
/**
* @file include/Core/Config.php
*
*/
class Config {
+ private static $cache;
+ private static $in_db;
+
/**
* @brief Loads all configuration values of family into a cached storage.
*
* The category of the configuration value
* @return void
*/
- public static function load($family) {
- global $a;
+ public static function load($family = "config") {
+
+ // We don't preload "system" anymore.
+ // This reduces the number of database reads a lot.
+ if ($family === 'system') {
+ return;
+ }
+
+ $a = get_app();
$r = q("SELECT `v`, `k` FROM `config` WHERE `cat` = '%s'", dbesc($family));
- if(count($r)) {
- foreach($r as $rr) {
+ if (dbm::is_result($r)) {
+ foreach ($r as $rr) {
$k = $rr['k'];
if ($family === 'config') {
$a->config[$k] = $rr['v'];
} else {
$a->config[$family][$k] = $rr['v'];
+ self::$cache[$family][$k] = $rr['v'];
+ self::$in_db[$family][$k] = true;
}
}
- } else if ($family != 'config') {
- // Negative caching
- $a->config[$family] = "!<unset>!";
}
}
* If true the config is loaded from the db and not from the cache (default: false)
* @return mixed Stored value or null if it does not exist
*/
- public static function get($family, $key, $default_value=null, $refresh = false) {
+ public static function get($family, $key, $default_value = null, $refresh = false) {
- global $a;
+ $a = get_app();
- if(! $refresh) {
- // Looking if the whole family isn't set
- if(isset($a->config[$family])) {
- if($a->config[$family] === '!<unset>!') {
- return $default_value;
- }
- }
+ if (!$refresh) {
- if(isset($a->config[$family][$key])) {
- if($a->config[$family][$key] === '!<unset>!') {
+ // Do we have the cached value? Then return it
+ if (isset(self::$cache[$family][$key])) {
+ if (self::$cache[$family][$key] === '!<unset>!') {
return $default_value;
+ } else {
+ return self::$cache[$family][$key];
}
- return $a->config[$family][$key];
}
}
- $ret = q("SELECT `v` FROM `config` WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",
+ $ret = q("SELECT `v` FROM `config` WHERE `cat` = '%s' AND `k` = '%s'",
dbesc($family),
dbesc($key)
);
- if(count($ret)) {
+ if (dbm::is_result($ret)) {
// manage array value
- $val = (preg_match("|^a:[0-9]+:{.*}$|s", $ret[0]['v'])?unserialize( $ret[0]['v']):$ret[0]['v']);
- $a->config[$family][$key] = $val;
+ $val = (preg_match("|^a:[0-9]+:{.*}$|s", $ret[0]['v']) ? unserialize($ret[0]['v']) : $ret[0]['v']);
+ // Assign the value from the database to the cache
+ self::$cache[$family][$key] = $val;
+ self::$in_db[$family][$key] = true;
return $val;
+ } elseif (isset($a->config[$family][$key])) {
+
+ // Assign the value (mostly) from the .htconfig.php to the cache
+ self::$cache[$family][$key] = $a->config[$family][$key];
+ self::$in_db[$family][$key] = false;
+
+ return $a->config[$family][$key];
}
- else {
- $a->config[$family][$key] = '!<unset>!';
- }
+
+ self::$cache[$family][$key] = '!<unset>!';
+ self::$in_db[$family][$key] = false;
+
return $default_value;
}
* The value to store
* @return mixed Stored $value or false if the database update failed
*/
- public static function set($family,$key,$value) {
- global $a;
+ public static function set($family, $key, $value) {
+ $a = get_app();
- // If $a->config[$family] has been previously set to '!<unset>!', then
- // $a->config[$family][$key] will evaluate to $a->config[$family][0], and
- // $a->config[$family][$key] = $value will be equivalent to
- // $a->config[$family][0] = $value[0] (this causes infuriating bugs),
- // so unset the family before assigning a value to a family's key
- if($a->config[$family] === '!<unset>!')
- unset($a->config[$family]);
+ // We store our setting values in a string variable.
+ // So we have to do the conversion here so that the compare below works.
+ // The exception are array values.
+ $dbvalue = (!is_array($value) ? (string)$value : $value);
+
+ $stored = self::get($family, $key, null, true);
+
+ if (($stored === $dbvalue) AND self::$in_db[$family][$key]) {
+ return true;
+ }
+
+ if ($family === 'config') {
+ $a->config[$key] = $dbvalue;
+ } elseif ($family != 'system') {
+ $a->config[$family][$key] = $dbvalue;
+ }
+
+ // Assign the just added value to the cache
+ self::$cache[$family][$key] = $dbvalue;
// manage array value
- $dbvalue = (is_array($value)?serialize($value):$value);
- $dbvalue = (is_bool($dbvalue) ? intval($dbvalue) : $dbvalue);
- if(is_null(self::get($family,$key,null,true))) {
- $a->config[$family][$key] = $value;
- $ret = q("INSERT INTO `config` ( `cat`, `k`, `v` ) VALUES ( '%s', '%s', '%s' ) ",
+ $dbvalue = (is_array($value) ? serialize($value) : $dbvalue);
+
+ if (is_null($stored) OR !self::$in_db[$family][$key]) {
+ $ret = q("INSERT INTO `config` (`cat`, `k`, `v`) VALUES ('%s', '%s', '%s') ON DUPLICATE KEY UPDATE `v` = '%s'",
dbesc($family),
dbesc($key),
+ dbesc($dbvalue),
dbesc($dbvalue)
);
- if($ret)
- return $value;
- return $ret;
+ } else {
+ $ret = q("UPDATE `config` SET `v` = '%s' WHERE `cat` = '%s' AND `k` = '%s'",
+ dbesc($dbvalue),
+ dbesc($family),
+ dbesc($key)
+ );
}
-
- $ret = q("UPDATE `config` SET `v` = '%s' WHERE `cat` = '%s' AND `k` = '%s'",
- dbesc($dbvalue),
- dbesc($family),
- dbesc($key)
- );
-
- $a->config[$family][$key] = $value;
-
- if($ret)
+ if ($ret) {
+ self::$in_db[$family][$key] = true;
return $value;
+ }
return $ret;
}
* The configuration key to delete
* @return mixed
*/
- public static function delete($family,$key) {
+ public static function delete($family, $key) {
- global $a;
- if(x($a->config[$family],$key))
- unset($a->config[$family][$key]);
+ if (isset(self::$cache[$family][$key])) {
+ unset(self::$cache[$family][$key]);
+ unset(self::$in_db[$family][$key]);
+ }
$ret = q("DELETE FROM `config` WHERE `cat` = '%s' AND `k` = '%s'",
dbesc($family),
dbesc($key)
return $ret;
}
-
}