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<?php |
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/** |
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* URL resolution logic for the Canonical URLs module. |
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* |
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* @package automattic/jetpack |
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*/ |
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|
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/** |
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* Resolves canonical URLs for different archive page types. |
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* |
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* URLs are built from scratch using WordPress API functions (get_permalink, |
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* get_term_link, etc.) rather than parsing the current request URL, so they |
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* are inherently clean — no sorting, filtering, or tracking parameters. |
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*/ |
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class Jetpack_Canonical_Urls_Resolver { |
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|
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/** |
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* Get the canonical URL for the current page. |
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* |
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* Routes to the correct URL based on the current query conditionals. |
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* |
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* @since 15.6 |
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* |
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* @return string The canonical URL, or empty string if none should be output. |
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*/ |
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public static function get_canonical_url() { |
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$url = ''; |
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|
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if ( is_front_page() && is_home() ) { |
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// Default homepage (latest posts). |
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$url = home_url( '/' ); |
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} elseif ( is_front_page() ) { |
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// Static front page. |
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$url = home_url( '/' ); |
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} elseif ( is_home() ) { |
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// Blog page (when a static front page is set). |
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$blog_page_id = (int) get_option( 'page_for_posts' ); |
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if ( $blog_page_id ) { |
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$url = get_permalink( $blog_page_id ); |
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} |
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} elseif ( function_exists( 'is_shop' ) && is_shop() ) { |
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// WooCommerce shop page. |
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$shop_page_id = (int) get_option( 'woocommerce_shop_page_id' ); |
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if ( $shop_page_id ) { |
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$url = get_permalink( $shop_page_id ); |
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} |
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} elseif ( is_category() || is_tag() || is_tax() ) { |
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$term = get_queried_object(); |
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if ( $term instanceof WP_Term ) { |
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$url = get_term_link( $term ); |
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if ( is_wp_error( $url ) ) { |
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$url = ''; |
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} |
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} |
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} elseif ( is_post_type_archive() ) { |
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$url = get_post_type_archive_link( get_query_var( 'post_type' ) ); |
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if ( false === $url ) { |
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$url = ''; |
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} |
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} elseif ( is_author() ) { |
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$author_id = (int) get_query_var( 'author' ); |
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if ( $author_id ) { |
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$url = get_author_posts_url( $author_id ); |
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} |
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} elseif ( is_year() ) { |
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$url = get_year_link( get_query_var( 'year' ) ); |
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} elseif ( is_month() ) { |
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$url = get_month_link( get_query_var( 'year' ), get_query_var( 'monthnum' ) ); |
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} elseif ( is_day() ) { |
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$url = get_day_link( get_query_var( 'year' ), get_query_var( 'monthnum' ), get_query_var( 'day' ) ); |
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} |
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// is_search() and is_404() intentionally return empty string (no canonical). |
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|
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if ( ! empty( $url ) ) { |
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$url = self::apply_pagination( $url ); |
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} |
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|
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/** |
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* Filter the canonical URL before output. |
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* |
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* @module canonical-urls |
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* |
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* @since 15.6 |
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* |
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* @param string $url The canonical URL for the current page. |
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*/ |
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return apply_filters( 'jetpack_canonical_url', $url ); |
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} |
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|
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/** |
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* Append pagination to the canonical URL for paged views. |
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* |
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* @since 15.6 |
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* |
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* @param string $url The base canonical URL. |
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* @return string The URL with pagination appended if applicable. |
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*/ |
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private static function apply_pagination( $url ) { |
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$paged = get_query_var( 'paged', 0 ); |
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|
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if ( $paged < 2 ) { |
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return $url; |
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} |
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|
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global $wp_rewrite; |
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|
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if ( $wp_rewrite->using_permalinks() && false === strpos( $url, '?' ) ) { |
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$url = user_trailingslashit( trailingslashit( $url ) . $wp_rewrite->pagination_base . '/' . $paged ); |
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} else { |
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$url = add_query_arg( 'paged', $paged, $url ); |
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} |
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|
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return $url; |
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} |
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} |
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|
