1 files changed, 141 insertions, 0 deletions
diff --git a/wp-includes/class-wp-widget-factory.php b/wp-includes/class-wp-widget-factory.php
new file mode 100644
index 0000000..ed719b9
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+++ b/wp-includes/class-wp-widget-factory.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * Widget API: WP_Widget_Factory class
+ *
+ * @package WordPress
+ * @subpackage Widgets
+ * @since 4.4.0
+ */
+
+/**
+ * Singleton that registers and instantiates WP_Widget classes.
+ *
+ * @since 2.8.0
+ * @since 4.4.0 Moved to its own file from wp-includes/widgets.php
+ */
+#[AllowDynamicProperties]
+class WP_Widget_Factory {
+
+	/**
+	 * Widgets array.
+	 *
+	 * @since 2.8.0
+	 * @var array
+	 */
+	public $widgets = array();
+
+	/**
+	 * PHP5 constructor.
+	 *
+	 * @since 4.3.0
+	 */
+	public function __construct() {
+		add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 );
+	}
+
+	/**
+	 * PHP4 constructor.
+	 *
+	 * @since 2.8.0
+	 * @deprecated 4.3.0 Use __construct() instead.
+	 *
+	 * @see WP_Widget_Factory::__construct()
+	 */
+	public function WP_Widget_Factory() {
+		_deprecated_constructor( 'WP_Widget_Factory', '4.3.0' );
+		self::__construct();
+	}
+
+	/**
+	 * Registers a widget subclass.
+	 *
+	 * @since 2.8.0
+	 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object
+	 *              instead of simply a `WP_Widget` subclass name.
+	 *
+	 * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass.
+	 */
+	public function register( $widget ) {
+		if ( $widget instanceof WP_Widget ) {
+			$this->widgets[ spl_object_hash( $widget ) ] = $widget;
+		} else {
+			$this->widgets[ $widget ] = new $widget();
+		}
+	}
+
+	/**
+	 * Un-registers a widget subclass.
+	 *
+	 * @since 2.8.0
+	 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object
+	 *              instead of simply a `WP_Widget` subclass name.
+	 *
+	 * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass.
+	 */
+	public function unregister( $widget ) {
+		if ( $widget instanceof WP_Widget ) {
+			unset( $this->widgets[ spl_object_hash( $widget ) ] );
+		} else {
+			unset( $this->widgets[ $widget ] );
+		}
+	}
+
+	/**
+	 * Serves as a utility method for adding widgets to the registered widgets global.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @global array $wp_registered_widgets
+	 */
+	public function _register_widgets() {
+		global $wp_registered_widgets;
+		$keys       = array_keys( $this->widgets );
+		$registered = array_keys( $wp_registered_widgets );
+		$registered = array_map( '_get_widget_id_base', $registered );
+
+		foreach ( $keys as $key ) {
+			// Don't register new widget if old widget with the same id is already registered.
+			if ( in_array( $this->widgets[ $key ]->id_base, $registered, true ) ) {
+				unset( $this->widgets[ $key ] );
+				continue;
+			}
+
+			$this->widgets[ $key ]->_register();
+		}
+	}
+
+	/**
+	 * Returns the registered WP_Widget object for the given widget type.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param string $id_base Widget type ID.
+	 * @return WP_Widget|null
+	 */
+	public function get_widget_object( $id_base ) {
+		$key = $this->get_widget_key( $id_base );
+		if ( '' === $key ) {
+			return null;
+		}
+
+		return $this->widgets[ $key ];
+	}
+
+	/**
+	 * Returns the registered key for the given widget type.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param string $id_base Widget type ID.
+	 * @return string
+	 */
+	public function get_widget_key( $id_base ) {
+		foreach ( $this->widgets as $key => $widget_object ) {
+			if ( $widget_object->id_base === $id_base ) {
+				return $key;
+			}
+		}
+
+		return '';
+	}
+}