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<?php namespace Yoast\WP\SEO\Integrations; use WP_HTML_Tag_Processor; use WPSEO_Replace_Vars; use Yoast\WP\SEO\Conditionals\Front_End_Conditional; use Yoast\WP\SEO\Context\Meta_Tags_Context; use Yoast\WP\SEO\Helpers\Options_Helper; use Yoast\WP\SEO\Memoizers\Meta_Tags_Context_Memoizer; use Yoast\WP\SEO\Presenters\Abstract_Indexable_Presenter; use Yoast\WP\SEO\Presenters\Debug\Marker_Close_Presenter; use Yoast\WP\SEO\Presenters\Debug\Marker_Open_Presenter; use Yoast\WP\SEO\Presenters\Title_Presenter; use Yoast\WP\SEO\Surfaces\Helpers_Surface; use YoastSEO_Vendor\Symfony\Component\DependencyInjection\ContainerInterface; /** * Class Front_End_Integration. / class Front_End_Integration implements Integration_Interface { /* * The memoizer for the meta tags context. * * @var Meta_Tags_Context_Memoizer / private $context_memoizer; /* * The container. * * @var ContainerInterface / protected $container; /* * Represents the options helper. * * @var Options_Helper / protected $options; /* * The helpers surface. * * @var Helpers_Surface / protected $helpers; /* * The replace vars helper. * * @var WPSEO_Replace_Vars / protected $replace_vars; /* * The presenters we loop through on each page load. * * @var string[] / protected $base_presenters = [ 'Title', 'Meta_Description', 'Robots', ]; /* * The presenters we loop through on each page load. * * @var string[] / protected $indexing_directive_presenters = [ 'Canonical', 'Rel_Prev', 'Rel_Next', ]; /* * The Open Graph specific presenters. * * @var string[] / protected $open_graph_presenters = [ 'Open_Graph\Locale', 'Open_Graph\Type', 'Open_Graph\Title', 'Open_Graph\Description', 'Open_Graph\Url', 'Open_Graph\Site_Name', 'Open_Graph\Article_Publisher', 'Open_Graph\Article_Author', 'Open_Graph\Article_Published_Time', 'Open_Graph\Article_Modified_Time', 'Open_Graph\Image', 'Meta_Author', ]; /* * The Open Graph specific presenters that should be output on error pages. * * @var array<string> / protected $open_graph_error_presenters = [ 'Open_Graph\Locale', 'Open_Graph\Title', 'Open_Graph\Site_Name', ]; /* * The Twitter card specific presenters. * * @var array<string> / protected $twitter_card_presenters = [ 'Twitter\Card', 'Twitter\Title', 'Twitter\Description', 'Twitter\Image', 'Twitter\Creator', 'Twitter\Site', ]; /* * The Slack specific presenters. * * @var array<string> / protected $slack_presenters = [ 'Slack\Enhanced_Data', ]; /* * The Webmaster verification specific presenters. * * @var array<string> / protected $webmaster_verification_presenters = [ 'Webmaster\Baidu', 'Webmaster\Bing', 'Webmaster\Google', 'Webmaster\Pinterest', 'Webmaster\Yandex', ]; /* * Presenters that are only needed on singular pages. * * @var array<string> / protected $singular_presenters = [ 'Meta_Author', 'Open_Graph\Article_Author', 'Open_Graph\Article_Publisher', 'Open_Graph\Article_Published_Time', 'Open_Graph\Article_Modified_Time', 'Twitter\Creator', 'Slack\Enhanced_Data', ]; /* * The presenters we want to be last in our output. * * @var array<string> / protected $closing_presenters = [ 'Schema', ]; /* * The next output. * * @var string / protected $next; /* * The prev output. * * @var string / protected $prev; /* * Returns the conditionals based on which this loadable should be active. * * @return array<string> The conditionals. / public static function get_conditionals() { return [ Front_End_Conditional::class ]; } /* * Front_End_Integration constructor. * * @codeCoverageIgnore It sets dependencies. * * @param Meta_Tags_Context_Memoizer $context_memoizer The meta tags context memoizer. * @param ContainerInterface $service_container The DI container. * @param Options_Helper $options The options helper. * @param Helpers_Surface $helpers The helpers surface. * @param WPSEO_Replace_Vars $replace_vars The replace vars helper. / public function __construct( Meta_Tags_Context_Memoizer $context_memoizer, ContainerInterface $service_container, Options_Helper $options, Helpers_Surface $helpers, WPSEO_Replace_Vars $replace_vars ) { $this->container = $service_container; $this->context_memoizer = $context_memoizer; $this->options = $options; $this->helpers = $helpers; $this->replace_vars = $replace_vars; } /* * Registers the appropriate hooks to show the SEO metadata on the frontend. * * Removes some actions to remove metadata that WordPress shows on the frontend, * to avoid duplicate and/or mismatched metadata. * * @return void / public function register_hooks() { \add_filter( 'render_block', [ $this, 'query_loop_next_prev' ], 1, 2 ); \add_action( 'wp_head', [ $this, 'call_wpseo_head' ], 1 ); // Filter the title for compatibility with other plugins and themes. \add_filter( 'wp_title', [ $this, 'filter_title' ], 15 ); // Filter the title for compatibility with block-based themes. \add_filter( 'pre_get_document_title', [ $this, 'filter_title' ], 15 ); // Removes our robots presenter from the list when wp_robots is handling this. \add_filter( 'wpseo_frontend_presenter_classes', [ $this, 'filter_robots_presenter' ] ); \add_action( 'wpseo_head', [ $this, 'present_head' ], -9999 ); \remove_action( 'wp_head', 'rel_canonical' ); \remove_action( 'wp_head', 'index_rel_link' ); \remove_action( 'wp_head', 'start_post_rel_link' ); \remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head' ); \remove_action( 'wp_head', 'noindex', 1 ); \remove_action( 'wp_head', '_wp_render_title_tag', 1 ); \remove_action( 'wp_head', '_block_template_render_title_tag', 1 ); \remove_action( 'wp_head', 'gutenberg_render_title_tag', 1 ); } /* * Filters the title, mainly used for compatibility reasons. * * @return string / public function filter_title() { $context = $this->context_memoizer->for_current_page(); $title_presenter = new Title_Presenter(); /* This filter is documented in src/integrations/front-end-integration.php / $title_presenter->presentation = \apply_filters( 'wpseo_frontend_presentation', $context->presentation, $context ); $title_presenter->replace_vars = $this->replace_vars; $title_presenter->helpers = $this->helpers; \remove_filter( 'pre_get_document_title', [ $this, 'filter_title' ], 15 ); $title = \esc_html( $title_presenter->get() ); \add_filter( 'pre_get_document_title', [ $this, 'filter_title' ], 15 ); return $title; } /* * Filters the next and prev links in the query loop block. * * @param string $html The HTML output. * @param array<string\|array\|null> $block The block. * @return string The filtered HTML output. / public function query_loop_next_prev( $html, $block ) { if ( $block['blockName'] === 'core/query' ) { // Check that the query does not inherit the main query. if ( isset( $block['attrs']['query']['inherit'] ) && ! $block['attrs']['query']['inherit'] ) { \add_filter( 'wpseo_adjacent_rel_url', [ $this, 'adjacent_rel_url' ], 1, 3 ); } } if ( $block['blockName'] === 'core/query-pagination-next' ) { $this->next = $html; } if ( $block['blockName'] === 'core/query-pagination-previous' ) { $this->prev = $html; } return $html; } /* * Returns correct adjacent pages when Query loop block does not inherit query from template. * Prioritizes existing prev and next links. * Includes a safety check for full urls though it is not expected in the query pagination block. * * @param string $link The current link. * @param string $rel Link relationship, prev or next. * @param Indexable_Presentation\|null $presentation The indexable presentation. * * @return string The correct link. / public function adjacent_rel_url( $link, $rel, $presentation = null ) { // Prioritize existing prev and next links. if ( $link ) { return $link; } // Safety check for rel value. if ( $rel !== 'next' && $rel !== 'prev' ) { return $link; } // Check $this->next or $this->prev for existing links. if ( $this->$rel === null ) { return $link; } $processor = new WP_HTML_Tag_Processor( $this->$rel ); if ( ! $processor->next_tag( [ 'tag_name' => 'a' ] ) ) { return $link; } $href = $processor->get_attribute( 'href' ); if ( ! $href ) { return $link; } // Safety check for full url, not expected. if ( \strpos( $href, 'http' ) === 0 ) { return $href; } // Check if $href is relative and append last part of the url to permalink. if ( \strpos( $href, '/' ) === 0 ) { $href_parts = \explode( '/', $href ); return $presentation->permalink . \end( $href_parts ); } return $link; } /* * Filters our robots presenter, but only when wp_robots is attached to the wp_head action. * * @param array<string> $presenters The presenters for current page. * * @return array<string> The filtered presenters. / public function filter_robots_presenter( $presenters ) { if ( ! \function_exists( 'wp_robots' ) ) { return $presenters; } if ( ! \has_action( 'wp_head', 'wp_robots' ) ) { return $presenters; } if ( \wp_is_serving_rest_request() ) { return $presenters; } return \array_diff( $presenters, [ 'Yoast\\WP\\SEO\\Presenters\\Robots_Presenter' ] ); } /* * Presents the head in the front-end. Resets wp_query if it's not the main query. * * @codeCoverageIgnore It just calls a WordPress function. * * @return void / public function call_wpseo_head() { global $wp_query; $old_wp_query = $wp_query; // phpcs:ignore WordPress.WP.DiscouragedFunctions.wp_reset_query_wp_reset_query -- Reason: The recommended function, wp_reset_postdata, doesn't reset wp_query. \wp_reset_query(); \do_action( 'wpseo_head' ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited -- Reason: we have to restore the query. $GLOBALS['wp_query'] = $old_wp_query; } /* * Echoes all applicable presenters for a page. * * @return void / public function present_head() { $context = $this->context_memoizer->for_current_page(); $presenters = $this->get_presenters( $context->page_type, $context ); /* * Filter 'wpseo_frontend_presentation' - Allow filtering the presentation used to output our meta values. * * @param Indexable_Presention $presentation The indexable presentation. * @param Meta_Tags_Context $context The meta tags context for the current page. / $presentation = \apply_filters( 'wpseo_frontend_presentation', $context->presentation, $context ); echo \PHP_EOL; foreach ( $presenters as $presenter ) { $presenter->presentation = $presentation; $presenter->helpers = $this->helpers; $presenter->replace_vars = $this->replace_vars; $output = $presenter->present(); if ( ! empty( $output ) ) { // phpcs:ignore WordPress.Security.EscapeOutput -- Presenters are responsible for correctly escaping their output. echo "\t" . $output . \PHP_EOL; } } echo \PHP_EOL . \PHP_EOL; } /* * Returns all presenters for this page. * * @param string $page_type The page type. * @param Meta_Tags_Context\|null $context The meta tags context for the current page. * * @return Abstract_Indexable_Presenter[] The presenters. / public function get_presenters( $page_type, $context = null ) { if ( $context === null ) { $context = $this->context_memoizer->for_current_page(); } $needed_presenters = $this->get_needed_presenters( $page_type ); $callback = static function ( $presenter ) { if ( ! \class_exists( $presenter ) ) { return null; } return new $presenter(); }; $presenters = \array_filter( \array_map( $callback, $needed_presenters ) ); /* * Filter 'wpseo_frontend_presenters' - Allow filtering the presenter instances in or out of the request. * * @param Abstract_Indexable_Presenter[] $presenters List of presenter instances. * @param Meta_Tags_Context $context The meta tags context for the current page. / $presenter_instances = \apply_filters( 'wpseo_frontend_presenters', $presenters, $context ); if ( ! \is_array( $presenter_instances ) ) { $presenter_instances = $presenters; } $is_presenter_callback = static function ( $presenter_instance ) { return $presenter_instance instanceof Abstract_Indexable_Presenter; }; $presenter_instances = \array_filter( $presenter_instances, $is_presenter_callback ); return \array_merge( [ new Marker_Open_Presenter() ], $presenter_instances, [ new Marker_Close_Presenter() ] ); } /* * Generate the array of presenters we need for the current request. * * @param string $page_type The page type we're retrieving presenters for. * * @return string[] The presenters. / private function get_needed_presenters( $page_type ) { $presenters = $this->get_presenters_for_page_type( $page_type ); $presenters = $this->maybe_remove_title_presenter( $presenters ); $callback = static function ( $presenter ) { return "Yoast\WP\SEO\Presenters\\{$presenter}_Presenter"; }; $presenters = \array_map( $callback, $presenters ); /* * Filter 'wpseo_frontend_presenter_classes' - Allow filtering presenters in or out of the request. * * @param array $presenters List of presenters. * @param string $page_type The current page type. / $presenters = \apply_filters( 'wpseo_frontend_presenter_classes', $presenters, $page_type ); return $presenters; } /* * Filters the presenters based on the page type. * * @param string $page_type The page type. * * @return string[] The presenters. / private function get_presenters_for_page_type( $page_type ) { if ( $page_type === 'Error_Page' ) { $presenters = $this->base_presenters; if ( $this->options->get( 'opengraph' ) === true ) { $presenters = \array_merge( $presenters, $this->open_graph_error_presenters ); } return \array_merge( $presenters, $this->closing_presenters ); } $presenters = $this->get_all_presenters(); if ( \in_array( $page_type, [ 'Static_Home_Page', 'Home_Page' ], true ) ) { $presenters = \array_merge( $presenters, $this->webmaster_verification_presenters ); } // Filter out the presenters only needed for singular pages on non-singular pages. if ( ! \in_array( $page_type, [ 'Post_Type', 'Static_Home_Page' ], true ) ) { $presenters = \array_diff( $presenters, $this->singular_presenters ); } // Filter out `twitter:data` presenters for static home pages. if ( $page_type === 'Static_Home_Page' ) { $presenters = \array_diff( $presenters, $this->slack_presenters ); } return $presenters; } /* * Returns a list of all available presenters based on settings. * * @return string[] The presenters. / private function get_all_presenters() { $presenters = \array_merge( $this->base_presenters, $this->indexing_directive_presenters ); if ( $this->options->get( 'opengraph' ) === true ) { $presenters = \array_merge( $presenters, $this->open_graph_presenters ); } if ( $this->options->get( 'twitter' ) === true && \apply_filters( 'wpseo_output_twitter_card', true ) !== false ) { $presenters = \array_merge( $presenters, $this->twitter_card_presenters ); } if ( $this->options->get( 'enable_enhanced_slack_sharing' ) === true && \apply_filters( 'wpseo_output_enhanced_slack_data', true ) !== false ) { $presenters = \array_merge( $presenters, $this->slack_presenters ); } return \array_merge( $presenters, $this->closing_presenters ); } /* * Whether the title presenter should be removed. * * @return bool True when the title presenter should be removed, false otherwise. / public function should_title_presenter_be_removed() { return ! \get_theme_support( 'title-tag' ) && ! $this->options->get( 'forcerewritetitle', false ); } /* * Checks if the Title presenter needs to be removed. * * @param string[] $presenters The presenters. * * @return string[] The presenters. */ private function maybe_remove_title_presenter( $presenters ) { // Do not remove the title if we're on a REST request. if ( \wp_is_serving_rest_request() ) { return $presenters; } // Remove the title presenter if the theme is hardcoded to output a title tag so we don't have two title tags. if ( $this->should_title_presenter_be_removed() ) { $presenters = \array_diff( $presenters, [ 'Title' ] ); } return $presenters; } }