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<?php |
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/** |
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* @package CleverStyle Framework |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2011-2017, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs; |
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/** |
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* @method static $this instance($check = false) |
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*/ |
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class Key { |
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use |
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Singleton; |
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/** |
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* Generates guaranteed unique key |
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* |
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* @param int|\cs\DB\_Abstract $database Keys database |
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* |
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* @return string |
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* |
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* @throws ExitException |
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*/ |
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public function generate ($database) { |
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if (!is_object($database)) { |
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$database = DB::instance()->db_prime($database); |
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} |
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while (true) { |
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$key = hash('sha224', random_bytes(1000)); |
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$time = time(); |
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if (!$database->qfs( |
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"SELECT `id` |
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FROM `[prefix]keys` |
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WHERE |
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`key` = '$key' AND |
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`expire` >= $time |
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LIMIT 1" |
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) |
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) { |
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return $key; |
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} |
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} |
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} |
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/** |
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* Adding key into specified database |
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* |
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* @param int|\cs\DB\_Abstract $database Keys database |
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* @param bool|string $key If <b>false</b> - key will be generated automatically, otherwise must contain 56 character [0-9a-z] key |
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* @param null|mixed $data Data to be stored with key |
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* @param int $expire Timestamp of key expiration, if not specified - default system value will be used |
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* |
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* @return false|string |
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* |
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* @throws ExitException |
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*/ |
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public function add ($database, $key, $data = null, $expire = 0) { |
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if (!is_object($database)) { |
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$database = DB::instance()->db_prime($database); |
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} |
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if ($key === false) { |
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$key = $this->generate($database); |
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} elseif (!preg_match('/^[a-z0-9]{56}$/', $key)) { |
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return false; |
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} |
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$expire = (int)$expire; |
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$Config = Config::instance(); |
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$time = time(); |
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if ($expire == 0 || $expire < $time) { |
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$expire = $time + $Config->core['key_expire']; |
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} |
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$this->del($database, $key); |
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$database->q( |
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"INSERT INTO `[prefix]keys` |
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( |
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`key`, |
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`expire`, |
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`data` |
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) VALUES ( |
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'%s', |
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'%s', |
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'%s' |
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)", |
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$key, |
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$expire, |
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_json_encode($data) |
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); |
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$id = $database->id(); |
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/** |
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* Cleaning old keys |
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*/ |
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if ($id && ($id % $Config->core['inserts_limit']) == 0) { |
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$database->q( |
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"DELETE FROM `[prefix]keys` |
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WHERE `expire` < $time" |
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); |
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} |
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return $key; |
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} |
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/** |
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* Check key existence and/or getting of data stored with key. After this key will be deleted automatically. |
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* |
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* @param int|\cs\DB\_Abstract $database Keys database |
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* @param string $key 56 character [0-9a-z] key |
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* @param bool $get_data If <b>true</d> - stored data will be returned on success, otherwise boolean result of key existence will be |
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* returned |
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* |
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* @return bool|mixed |
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* |
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* @throws ExitException |
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*/ |
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public function get ($database, $key, $get_data = false) { |
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if (!preg_match('/^[a-z0-9]{56}$/', $key)) { |
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return false; |
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} |
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if (!is_object($database)) { |
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$database = DB::instance()->db_prime($database); |
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} |
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$time = time(); |
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$result = $database->qf( |
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"SELECT |
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`id`, |
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`data` |
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FROM `[prefix]keys` |
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WHERE |
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( |
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`key` = '$key' |
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) AND |
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`expire` >= $time |
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ORDER BY `id` DESC |
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LIMIT 1" |
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); |
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$this->del($database, $key); |
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if (!$result || !is_array($result)) { |
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return false; |
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} elseif ($get_data) { |
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return _json_decode($result['data']); |
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} else { |
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return true; |
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} |
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} |
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/** |
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* Key deletion from database |
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* |
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* @param int|\cs\DB\_Abstract $database Keys database |
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* @param string $key 56 character [0-9a-z] key |
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* |
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* @return bool |
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* |
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* @throws ExitException |
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*/ |
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public function del ($database, $key) { |
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if (!preg_match('/^[a-z0-9]{56}$/', $key)) { |
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return false; |
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} |
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if (!is_object($database)) { |
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$database = DB::instance()->db_prime($database); |
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} |
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return (bool)$database->q( |
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"DELETE FROM `[prefix]keys` |
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WHERE `key` = '$key'" |
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); |
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} |
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} |
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nazar-pc /
CleverStyle-Framework
