khaihihi

wp-content/plugins/wordpress-seo/src/loader.php

@@ -0,0 +1,126 @@
+<?php
+/**
+ * Yoast SEO Plugin File.
+ *
+ * @package Yoast\WP\SEO
+ */
+
+namespace Yoast\WP\SEO;
+
+use YoastSEO_Vendor\Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Class that manages loading integrations if and only if all their conditionals are met.
+ */
+class Loader {
+
+	/**
+	 * The registered integrations.
+	 *
+	 * @var \Yoast\WP\SEO\WordPress\Integration[]
+	 */
+	protected $integrations = [];
+
+	/**
+	 * The registered initializer.
+	 *
+	 * @var \Yoast\WP\SEO\WordPress\Initializer[]
+	 */
+	protected $initializers = [];
+
+	/**
+	 * The dependency injection container.
+	 *
+	 * @var \YoastSEO_Vendor\Symfony\Component\DependencyInjection\ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * Loader constructor.
+	 *
+	 * @param \YoastSEO_Vendor\Symfony\Component\DependencyInjection\ContainerInterface $container The dependency injection container.
+	 */
+	public function __construct( ContainerInterface $container ) {
+		$this->container = $container;
+	}
+
+	/**
+	 * Registers an integration.
+	 *
+	 * @param string $class The class name of the integration to be loaded.
+	 *
+	 * @return void
+	 */
+	public function register_integration( $class ) {
+		$this->integrations[] = $class;
+	}
+
+	/**
+	 * Registers a initializer.
+	 *
+	 * @param string $class The class name of the initializer to be loaded.
+	 *
+	 * @return void
+	 */
+	public function register_initializer( $class ) {
+		$this->initializers[] = $class;
+	}
+
+	/**
+	 * Loads all registered classes if their conditionals are met.
+	 *
+	 * @return void
+	 */
+	public function load() {
+		$this->load_initializers();
+		$this->load_integrations();
+	}
+
+	/**
+	 * Loads all registered initializers if their conditionals are met.
+	 *
+	 * @return void
+	 */
+	protected function load_initializers() {
+		foreach ( $this->initializers as $class ) {
+			if ( ! $this->conditionals_are_met( $class ) ) {
+				continue;
+			}
+
+			$this->container->get( $class )->initialize();
+		}
+	}
+
+	/**
+	 * Loads all registered integrations if their conditionals are met.
+	 *
+	 * @return void
+	 */
+	protected function load_integrations() {
+		foreach ( $this->integrations as $class ) {
+			if ( ! $this->conditionals_are_met( $class ) ) {
+				continue;
+			}
+
+			$this->container->get( $class )->register_hooks();
+		}
+	}
+
+	/**
+	 * Checks if all conditionals of a given integration are met.
+	 *
+	 * @param \Yoast\WP\SEO\WordPress\Loadable $class The class name of the integration.
+	 *
+	 * @return bool Whether or not all conditionals of the integration are met.
+	 */
+	protected function conditionals_are_met( $class ) {
+		$conditionals = $class::get_conditionals();
+		foreach ( $conditionals as $conditional ) {
+			if ( ! $this->container->get( $conditional )->is_met() ) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+}