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<?php namespace Yoast\WP\SEO; use Throwable; use WP_CLI; 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 string[] */ protected $integrations = []; /** * The registered integrations. * * @var string[] */ protected $initializers = []; /** * The registered routes. * * @var string[] */ protected $routes = []; /** * The registered commands. * * @var string[] */ protected $commands = []; /** * The registered migrations. * * @var string[] */ protected $migrations = []; /** * The dependency injection container. * * @var ContainerInterface */ protected $container; /** * Loader constructor. * * @param ContainerInterface $container The dependency injection container. */ public function __construct( ContainerInterface $container ) { $this->container = $container; } /** * Registers an integration. * * @param string $integration_class The class name of the integration to be loaded. * * @return void */ public function register_integration( $integration_class ) { $this->integrations[] = $integration_class; } /** * Registers an initializer. * * @param string $initializer_class The class name of the initializer to be loaded. * * @return void */ public function register_initializer( $initializer_class ) { $this->initializers[] = $initializer_class; } /** * Registers a route. * * @param string $route_class The class name of the route to be loaded. * * @return void */ public function register_route( $route_class ) { $this->routes[] = $route_class; } /** * Registers a command. * * @param string $command_class The class name of the command to be loaded. * * @return void */ public function register_command( $command_class ) { $this->commands[] = $command_class; } /** * Registers a migration. * * @param string $plugin The plugin the migration belongs to. * @param string $version The version of the migration. * @param string $migration_class The class name of the migration to be loaded. * * @return void */ public function register_migration( $plugin, $version, $migration_class ) { if ( ! \array_key_exists( $plugin, $this->migrations ) ) { $this->migrations[ $plugin ] = []; } $this->migrations[ $plugin ][ $version ] = $migration_class; } /** * Loads all registered classes if their conditionals are met. * * @return void */ public function load() { $this->load_initializers(); if ( ! \did_action( 'init' ) ) { \add_action( 'init', [ $this, 'load_integrations' ] ); } else { $this->load_integrations(); } \add_action( 'rest_api_init', [ $this, 'load_routes' ] ); if ( \defined( 'WP_CLI' ) && \WP_CLI ) { $this->load_commands(); } } /** * Returns all registered migrations. * * @param string $plugin The plugin to get the migrations for. * * @return string[]|false The registered migrations. False if no migrations were registered. */ public function get_migrations( $plugin ) { if ( ! \array_key_exists( $plugin, $this->migrations ) ) { return false; } return $this->migrations[ $plugin ]; } /** * Loads all registered commands. * * Commands that opt in to conditional loading by implementing * Loadable_Interface are skipped when their conditionals are not met. * * @return void */ protected function load_commands() { foreach ( $this->commands as $class ) { if ( \is_subclass_of( $class, Loadable_Interface::class ) && ! $this->conditionals_are_met( $class ) ) { continue; } $command = $this->get_class( $class ); if ( $command === null ) { continue; } WP_CLI::add_command( $class::get_namespace(), $command ); } } /** * 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; } $initializer = $this->get_class( $class ); if ( $initializer === null ) { continue; } $initializer->initialize(); } } /** * Loads all registered integrations if their conditionals are met. * * @return void */ public function load_integrations() { foreach ( $this->integrations as $class ) { if ( ! $this->conditionals_are_met( $class ) ) { continue; } $integration = $this->get_class( $class ); if ( $integration === null ) { continue; } $integration->register_hooks(); } } /** * Loads all registered routes if their conditionals are met. * * @return void */ public function load_routes() { foreach ( $this->routes as $class ) { if ( ! $this->conditionals_are_met( $class ) ) { continue; } $route = $this->get_class( $class ); if ( $route === null ) { continue; } $route->register_routes(); } } /** * Checks if all conditionals of a given loadable are met. * * @param string $loadable_class The class name of the loadable. * * @return bool Whether all conditionals of the loadable are met. */ protected function conditionals_are_met( $loadable_class ) { // In production environments do not fatal if the class does not exist but log and fail gracefully. if ( \YOAST_ENVIRONMENT === 'production' && ! \class_exists( $loadable_class ) ) { if ( \defined( 'WP_DEBUG' ) && \WP_DEBUG ) { // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log \error_log( \sprintf( /* translators: %1$s expands to Yoast SEO, %2$s expands to the name of the class that could not be found. */ \__( '%1$s attempted to load the class %2$s but it could not be found.', 'wordpress-seo' ), 'Yoast SEO', $loadable_class, ), ); } return false; } $conditionals = $loadable_class::get_conditionals(); foreach ( $conditionals as $class ) { $conditional = $this->get_class( $class ); if ( $conditional === null || ! $conditional->is_met() ) { return false; } } return true; } /** * Gets a class from the container. * * @param string $class_name The class name. * * @return object|null The class or, in production environments, null if it does not exist. * * @throws Throwable If the class does not exist in development environments. */ protected function get_class( $class_name ) { try { return $this->container->get( $class_name ); } catch ( Throwable $e ) { // In production environments do not fatal if the class could not be constructed but log and fail gracefully. if ( \YOAST_ENVIRONMENT === 'production' ) { if ( \defined( 'WP_DEBUG' ) && \WP_DEBUG ) { // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log \error_log( $e->getMessage() ); } return null; } throw $e; } } }
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