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<?php
/**
* Get or set simple key-value-pairs, backed by the database
* to make them persistent.
*/
class Property
{
private static $cache = false;
/**
* Retrieve value from property store.
*
* @param string $key key to retrieve the value of
* @param mixed $default value to return if $key does not exist in the property store
* @return mixed the value attached to $key, or $default if $key does not exist
*/
private static function get($key, $default = false)
{
if (self::$cache === false) {
$res = Database::simpleQuery("SELECT name, value FROM property");
while ($row = $res->fetch(PDO::FETCH_ASSOC)) {
self::$cache[$row['name']] = $row['value'];
}
}
if (!isset(self::$cache[$key])) return $default;
return self::$cache[$key];
}
/**
* Set value in property store.
*
* @param string $key key of value to set
* @param type $value the value to store for $key
*/
private static function set($key, $value)
{
Database::exec("INSERT INTO property (name, value) VALUES (:key, :value)"
. " ON DUPLICATE KEY UPDATE value = VALUES(value)", array(
'key' => $key,
'value' => $value
));
if (self::$cache !== false) {
self::$cache[$key] = $value;
}
}
public static function getServerIp()
{
return self::get('server-ip', 'none');
}
public static function setServerIp($value)
{
self::set('server-ip', $value);
}
public static function getIPxeIp()
{
return self::get('ipxe-ip', 'none');
}
public static function setIPxeIp($value)
{
self::set('ipxe-ip', $value);
}
public static function getIPxeTaskId()
{
return self::get('ipxe-task');
}
public static function setIPxeTaskId($value)
{
self::set('ipxe-task', $value);
}
}
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