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<?php |
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/** |
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* @package Freemius |
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* @copyright Copyright (c) 2015, Freemius, Inc. |
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* @license https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3 |
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* @since 2.1.0 |
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*/ |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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/** |
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* Class FS_User_Lock |
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*/ |
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class FS_User_Lock { |
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/** |
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* @var int |
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*/ |
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private $_wp_user_id; |
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/** |
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* @var int |
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*/ |
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private $_thread_id; |
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#-------------------------------------------------------------------------------- |
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#region Singleton |
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#-------------------------------------------------------------------------------- |
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/** |
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* @var FS_User_Lock |
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*/ |
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private static $_instance; |
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/** |
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* @author Vova Feldman (@svovaf) |
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* @since 2.1.0 |
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* |
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* @return FS_User_Lock |
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*/ |
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static function instance() { |
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if ( ! isset( self::$_instance ) ) { |
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self::$_instance = new self(); |
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} |
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return self::$_instance; |
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} |
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#endregion |
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private function __construct() { |
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$this->_wp_user_id = Freemius::get_current_wp_user_id(); |
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$this->_thread_id = mt_rand( 0, 32000 ); |
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} |
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/** |
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* Try to acquire lock. If the lock is already set or is being acquired by another locker, don't do anything. |
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* |
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* @author Vova Feldman (@svovaf) |
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* @since 2.1.0 |
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* |
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* @param int $expiration |
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* |
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* @return bool TRUE if successfully acquired lock. |
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*/ |
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function try_lock( $expiration = 0 ) { |
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if ( $this->is_locked() ) { |
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// Already locked. |
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return false; |
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} |
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set_site_transient( "locked_{$this->_wp_user_id}", $this->_thread_id, $expiration ); |
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if ( $this->has_lock() ) { |
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set_site_transient( "locked_{$this->_wp_user_id}", true, $expiration ); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Acquire lock regardless if it's already acquired by another locker or not. |
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* |
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* @author Vova Feldman (@svovaf) |
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* @since 2.1.0 |
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* |
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* @param int $expiration |
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*/ |
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function lock( $expiration = 0 ) { |
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set_site_transient( "locked_{$this->_wp_user_id}", true, $expiration ); |
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} |
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/** |
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* Checks if lock is currently acquired. |
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* |
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* @author Vova Feldman (@svovaf) |
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* @since 2.1.0 |
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* |
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* @return bool |
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*/ |
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function is_locked() { |
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return ( false !== get_site_transient( "locked_{$this->_wp_user_id}" ) ); |
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} |
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/** |
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* Unlock the lock. |
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* |
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* @author Vova Feldman (@svovaf) |
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* @since 2.1.0 |
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*/ |
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function unlock() { |
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delete_site_transient( "locked_{$this->_wp_user_id}" ); |
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} |
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/** |
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* Checks if lock is currently acquired by the current locker. |
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* |
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* @return bool |
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*/ |
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private function has_lock() { |
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return ( $this->_thread_id == get_site_transient( "locked_{$this->_wp_user_id}" ) ); |
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} |
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} |
fooplugins /
foogallery
Loading history...
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.