Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
namespace Friendica\Core;
use dbm;
/**
* @file include/Core/Config.php
*
* @brief Contains the class with methods for system configuration
*/
/**
* @brief Arbitrary sytem configuration storage
* Note:
* Please do not store booleans - convert to 0/1 integer values
* The Config::get() functions return boolean false for keys that are unset,
* and this could lead to subtle bugs.
*
* There are a few places in the code (such as the admin panel) where boolean
* configurations need to be fixed as of 10/08/2011.
*/
class Config {
private static $cache;
private static $in_db;
/**
* @brief Loads all configuration values of family into a cached storage.
*
* All configuration values of the system are stored in global cache
* which is available under the global variable $a->config
*
* @param string $family
* The category of the configuration value
* @return void
*/
public static function load($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 (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;
}
}
}
}
/**
* @brief Get a particular user's config variable given the category name
* ($family) and a key.
*
* Get a particular config value from the given category ($family)
* and the $key from a cached storage in $a->config[$uid].
* $instore is only used by the set_config function
* to determine if the key already exists in the DB
* If a key is found in the DB but doesn't exist in
* local config cache, pull it into the cache so we don't have
* to hit the DB again for this item.
*
* @param string $family
* The category of the configuration value
* @param string $key
* The configuration key to query
* @param mixed $default_value optional
* The value to return if key is not set (default: null)
* @param boolean $refresh optional
* If true the config is loaded from the db and not from the cache (default: false)
* @return mixed Stored value or null if it does not exist
*/
public static function get($family, $key, $default_value = null, $refresh = false) {
$a = get_app();
if (!$refresh) {
// 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];
}
}
}
$ret = q("SELECT `v` FROM `config` WHERE `cat` = '%s' AND `k` = '%s'",
dbesc($family),
dbesc($key)
);
if (dbm::is_result($ret)) {
// manage array value
$val = (preg_match("|^a:[0-9]+:{.*}$|s", $ret[0]['v']) ? unserialize($ret[0]['v']) : $ret[0]['v']);
// Assign the value from the database to the cache
self::$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][$key];
}
self::$cache[$family][$key] = '!<unset>!';
self::$in_db[$family][$key] = false;
return $default_value;
}
/**
* @brief Sets a configuration value for system config
*
* Stores a config value ($value) in the category ($family) under the key ($key)
* for the user_id $uid.
*
* Note: Please do not store booleans - convert to 0/1 integer values!
*
* @param string $family
* The category of the configuration value
* @param string $key
* The configuration key to set
* @param string $value
* The value to store
* @return mixed Stored $value or false if the database update failed
*/
public static function set($family, $key, $value) {
$a = get_app();
// 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) : $dbvalue);
if (is_null($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)
);
} else {
$ret = q("UPDATE `config` SET `v` = '%s' WHERE `cat` = '%s' AND `k` = '%s'",
dbesc($dbvalue),
dbesc($family),
dbesc($key)
);
}
if ($ret) {
self::$in_db[$family][$key] = true;
return $value;
}
return $ret;
}
/**
* @brief Deletes the given key from the system configuration.
*
* Removes the configured value from the stored cache in $a->config
* and removes it from the database.
*
* @param string $family
* The category of the configuration value
* @param string $key
* The configuration key to delete
* @return mixed
*/
public static function delete($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;
}
}