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wp/wp-content/plugins/wordpress-seo/src/integrations/watchers/indexable-system-page-watcher.php

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+<?php
+
+namespace Yoast\WP\SEO\Integrations\Watchers;
+
+use Yoast\WP\SEO\Builders\Indexable_Builder;
+use Yoast\WP\SEO\Builders\Indexable_System_Page_Builder;
+use Yoast\WP\SEO\Conditionals\Migrations_Conditional;
+use Yoast\WP\SEO\Integrations\Integration_Interface;
+use Yoast\WP\SEO\Repositories\Indexable_Repository;
+
+/**
+ * Search result watcher to save the meta data to an Indexable.
+ *
+ * Watches the search result options to save the meta information when updated.
+ */
+class Indexable_System_Page_Watcher implements Integration_Interface {
+
+	/**
+	 * The indexable repository.
+	 *
+	 * @var Indexable_Repository
+	 */
+	protected $repository;
+
+	/**
+	 * The indexable builder.
+	 *
+	 * @var Indexable_Builder
+	 */
+	protected $builder;
+
+	/**
+	 * Returns the conditionals based on which this loadable should be active.
+	 *
+	 * @return array
+	 */
+	public static function get_conditionals() {
+		return [ Migrations_Conditional::class ];
+	}
+
+	/**
+	 * Indexable_System_Page_Watcher constructor.
+	 *
+	 * @param Indexable_Repository $repository The repository to use.
+	 * @param Indexable_Builder    $builder    The post builder to use.
+	 */
+	public function __construct( Indexable_Repository $repository, Indexable_Builder $builder ) {
+		$this->repository = $repository;
+		$this->builder    = $builder;
+	}
+
+	/**
+	 * Initializes the integration.
+	 *
+	 * This is the place to register hooks and filters.
+	 */
+	public function register_hooks() {
+		\add_action( 'update_option_wpseo_titles', [ $this, 'check_option' ], 10, 2 );
+	}
+
+	/**
+	 * Checks if the home page indexable needs to be rebuild based on option values.
+	 *
+	 * @param array $old_value The old value of the option.
+	 * @param array $new_value The new value of the option.
+	 *
+	 * @return void
+	 */
+	public function check_option( $old_value, $new_value ) {
+		foreach ( Indexable_System_Page_Builder::OPTION_MAPPING as $type => $options ) {
+			foreach ( $options as $option ) {
+				// If both values aren't set they haven't changed.
+				if ( ! isset( $old_value[ $option ] ) && ! isset( $new_value[ $option ] ) ) {
+					return;
+				}
+
+				// If the value was set but now isn't, is set but wasn't or is not the same it has changed.
+				if (
+					! isset( $old_value[ $option ] )
+					|| ! isset( $new_value[ $option ] )
+					|| $old_value[ $option ] !== $new_value[ $option ]
+				) {
+					$this->build_indexable( $type );
+				}
+			}
+		}
+	}
+
+	/**
+	 * Saves the search result.
+	 *
+	 * @param string $type The type of no index page.
+	 *
+	 * @return void
+	 */
+	public function build_indexable( $type ) {
+		$indexable = $this->repository->find_for_system_page( $type, false );
+		$this->builder->build_for_system_page( $type, $indexable );
+	}
+}