class-jetpack-canonical-urls-resolver.php
116 lines
| 1 | <?php |
| 2 | /** |
| 3 | * URL resolution logic for the Canonical URLs module. |
| 4 | * |
| 5 | * @package automattic/jetpack |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Resolves canonical URLs for different archive page types. |
| 10 | * |
| 11 | * URLs are built from scratch using WordPress API functions (get_permalink, |
| 12 | * get_term_link, etc.) rather than parsing the current request URL, so they |
| 13 | * are inherently clean — no sorting, filtering, or tracking parameters. |
| 14 | */ |
| 15 | class Jetpack_Canonical_Urls_Resolver { |
| 16 | |
| 17 | /** |
| 18 | * Get the canonical URL for the current page. |
| 19 | * |
| 20 | * Routes to the correct URL based on the current query conditionals. |
| 21 | * |
| 22 | * @since 15.6 |
| 23 | * |
| 24 | * @return string The canonical URL, or empty string if none should be output. |
| 25 | */ |
| 26 | public static function get_canonical_url() { |
| 27 | $url = ''; |
| 28 | |
| 29 | if ( is_front_page() && is_home() ) { |
| 30 | // Default homepage (latest posts). |
| 31 | $url = home_url( '/' ); |
| 32 | } elseif ( is_front_page() ) { |
| 33 | // Static front page. |
| 34 | $url = home_url( '/' ); |
| 35 | } elseif ( is_home() ) { |
| 36 | // Blog page (when a static front page is set). |
| 37 | $blog_page_id = (int) get_option( 'page_for_posts' ); |
| 38 | if ( $blog_page_id ) { |
| 39 | $url = get_permalink( $blog_page_id ); |
| 40 | } |
| 41 | } elseif ( function_exists( 'is_shop' ) && is_shop() ) { |
| 42 | // WooCommerce shop page. |
| 43 | $shop_page_id = (int) get_option( 'woocommerce_shop_page_id' ); |
| 44 | if ( $shop_page_id ) { |
| 45 | $url = get_permalink( $shop_page_id ); |
| 46 | } |
| 47 | } elseif ( is_category() || is_tag() || is_tax() ) { |
| 48 | $term = get_queried_object(); |
| 49 | if ( $term instanceof WP_Term ) { |
| 50 | $url = get_term_link( $term ); |
| 51 | if ( is_wp_error( $url ) ) { |
| 52 | $url = ''; |
| 53 | } |
| 54 | } |
| 55 | } elseif ( is_post_type_archive() ) { |
| 56 | $url = get_post_type_archive_link( get_query_var( 'post_type' ) ); |
| 57 | if ( false === $url ) { |
| 58 | $url = ''; |
| 59 | } |
| 60 | } elseif ( is_author() ) { |
| 61 | $author_id = (int) get_query_var( 'author' ); |
| 62 | if ( $author_id ) { |
| 63 | $url = get_author_posts_url( $author_id ); |
| 64 | } |
| 65 | } elseif ( is_year() ) { |
| 66 | $url = get_year_link( get_query_var( 'year' ) ); |
| 67 | } elseif ( is_month() ) { |
| 68 | $url = get_month_link( get_query_var( 'year' ), get_query_var( 'monthnum' ) ); |
| 69 | } elseif ( is_day() ) { |
| 70 | $url = get_day_link( get_query_var( 'year' ), get_query_var( 'monthnum' ), get_query_var( 'day' ) ); |
| 71 | } |
| 72 | // is_search() and is_404() intentionally return empty string (no canonical). |
| 73 | |
| 74 | if ( ! empty( $url ) ) { |
| 75 | $url = self::apply_pagination( $url ); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Filter the canonical URL before output. |
| 80 | * |
| 81 | * @module canonical-urls |
| 82 | * |
| 83 | * @since 15.6 |
| 84 | * |
| 85 | * @param string $url The canonical URL for the current page. |
| 86 | */ |
| 87 | return apply_filters( 'jetpack_canonical_url', $url ); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Append pagination to the canonical URL for paged views. |
| 92 | * |
| 93 | * @since 15.6 |
| 94 | * |
| 95 | * @param string $url The base canonical URL. |
| 96 | * @return string The URL with pagination appended if applicable. |
| 97 | */ |
| 98 | private static function apply_pagination( $url ) { |
| 99 | $paged = get_query_var( 'paged', 0 ); |
| 100 | |
| 101 | if ( $paged < 2 ) { |
| 102 | return $url; |
| 103 | } |
| 104 | |
| 105 | global $wp_rewrite; |
| 106 | |
| 107 | if ( $wp_rewrite->using_permalinks() && false === strpos( $url, '?' ) ) { |
| 108 | $url = user_trailingslashit( trailingslashit( $url ) . $wp_rewrite->pagination_base . '/' . $paged ); |
| 109 | } else { |
| 110 | $url = add_query_arg( 'paged', $paged, $url ); |
| 111 | } |
| 112 | |
| 113 | return $url; |
| 114 | } |
| 115 | } |
| 116 |