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| 1 | <?php |
| 2 | |
| 3 | namespace Automattic\Jetpack_Boost\Modules\Optimizations\Lcp; |
| 4 | |
| 5 | use WP_HTML_Tag_Processor; |
| 6 | |
| 7 | class LCP_Optimization_Util { |
| 8 | |
| 9 | /** |
| 10 | * Each LCP data is an array that includes the LCP for a certain viewport. |
| 11 | * |
| 12 | * @var array |
| 13 | */ |
| 14 | private $lcp_data; |
| 15 | |
| 16 | public function __construct( $lcp_data ) { |
| 17 | $this->lcp_data = $lcp_data; |
| 18 | } |
| 19 | |
| 20 | /** |
| 21 | * Check if LCP optimization should be skipped for the current request. |
| 22 | * |
| 23 | * @since 4.0.0 |
| 24 | * @return bool True if optimization should be skipped, false otherwise. |
| 25 | */ |
| 26 | public static function should_skip_optimization() { |
| 27 | /** |
| 28 | * Filters whether to short-circuit LCP optimization. |
| 29 | * |
| 30 | * Returning a value other than null from the filter will short-circuit |
| 31 | * the optimization check, returning that value instead. |
| 32 | * |
| 33 | * @since 4.0.0 |
| 34 | * |
| 35 | * @param null|bool $skip Whether to skip optimization. Default null. |
| 36 | */ |
| 37 | $pre = apply_filters( 'jetpack_boost_pre_should_skip_lcp_optimization', null ); |
| 38 | if ( null !== $pre ) { |
| 39 | return $pre; |
| 40 | } |
| 41 | |
| 42 | // Disable in robots.txt. |
| 43 | if ( isset( $_SERVER['REQUEST_URI'] ) && strpos( home_url( wp_unslash( $_SERVER['REQUEST_URI'] ) ), 'robots.txt' ) !== false ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- This is validating. |
| 44 | return true; |
| 45 | } |
| 46 | |
| 47 | // Disable in other possible AJAX requests setting cors related header. |
| 48 | if ( isset( $_SERVER['HTTP_SEC_FETCH_MODE'] ) && 'cors' === strtolower( $_SERVER['HTTP_SEC_FETCH_MODE'] ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- This is validating. |
| 49 | return true; |
| 50 | } |
| 51 | |
| 52 | // Disable in other possible AJAX requests setting XHR related header. |
| 53 | if ( isset( $_SERVER['HTTP_X_REQUESTED_WITH'] ) && 'xmlhttprequest' === strtolower( $_SERVER['HTTP_X_REQUESTED_WITH'] ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- This is validating. |
| 54 | return true; |
| 55 | } |
| 56 | |
| 57 | // Disable in all XLS (see the WP_Sitemaps_Renderer class). |
| 58 | if ( isset( $_SERVER['REQUEST_URI'] ) && |
| 59 | ( |
| 60 | // phpcs:disable WordPress.Security.ValidatedSanitizedInput -- This is validating. |
| 61 | str_contains( $_SERVER['REQUEST_URI'], '.xsl' ) || |
| 62 | str_contains( $_SERVER['REQUEST_URI'], 'sitemap-stylesheet=index' ) || |
| 63 | str_contains( $_SERVER['REQUEST_URI'], 'sitemap-stylesheet=sitemap' ) |
| 64 | // phpcs:enable WordPress.Security.ValidatedSanitizedInput |
| 65 | ) ) { |
| 66 | return true; |
| 67 | } |
| 68 | |
| 69 | // Disable in all POST Requests. |
| 70 | // phpcs:disable WordPress.Security.NonceVerification.Missing |
| 71 | if ( ! empty( $_POST ) ) { |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | // Disable in customizer previews |
| 76 | if ( is_customize_preview() ) { |
| 77 | return true; |
| 78 | } |
| 79 | |
| 80 | // Disable in feeds, AJAX, Cron, XML. |
| 81 | if ( is_feed() || wp_doing_ajax() || wp_doing_cron() || wp_is_xml_request() ) { |
| 82 | return true; |
| 83 | } |
| 84 | |
| 85 | // Disable in sitemaps. |
| 86 | if ( ! empty( get_query_var( 'sitemap' ) ) ) { |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | // Disable in AMP pages. |
| 91 | if ( function_exists( 'amp_is_request' ) && amp_is_request() ) { |
| 92 | return true; |
| 93 | } |
| 94 | |
| 95 | return false; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Check if a specific optimization should be applied based on cloud response. |
| 100 | * Returns true if no optimizations object exists (backward compatibility) or if the flag is truthy. |
| 101 | * |
| 102 | * @since 4.5.6 |
| 103 | * |
| 104 | * @param array $lcp_data The LCP data array. |
| 105 | * @param string $key The optimization key to check. |
| 106 | * @return bool True if the optimization should be applied. |
| 107 | */ |
| 108 | public static function should_apply_optimization( $lcp_data, $key ) { |
| 109 | return ! isset( $lcp_data['optimizations'] ) |
| 110 | || ! empty( $lcp_data['optimizations'][ $key ] ); |
| 111 | } |
| 112 | |
| 113 | public function get_lcp_image_url() { |
| 114 | if ( ! $this->can_optimize() ) { |
| 115 | return null; |
| 116 | } |
| 117 | |
| 118 | if ( LCP::TYPE_BACKGROUND_IMAGE !== $this->lcp_data['type'] && LCP::TYPE_IMAGE !== $this->lcp_data['type'] ) { |
| 119 | return null; |
| 120 | } |
| 121 | |
| 122 | if ( empty( $this->lcp_data['url'] ) ) { |
| 123 | return null; |
| 124 | } |
| 125 | |
| 126 | if ( ! wp_http_validate_url( $this->lcp_data['url'] ) ) { |
| 127 | return null; |
| 128 | } |
| 129 | |
| 130 | return $this->lcp_data['url']; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Check if the LCP data is valid and can be optimized. |
| 135 | * |
| 136 | * @return bool True if the LCP data is valid and can be optimized, false otherwise. |
| 137 | * |
| 138 | * @since 4.1.0 |
| 139 | */ |
| 140 | public function can_optimize() { |
| 141 | if ( empty( $this->lcp_data ) || ! is_array( $this->lcp_data ) ) { |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | if ( ! isset( $this->lcp_data['success'] ) || ! $this->lcp_data['success'] ) { |
| 146 | return false; |
| 147 | } |
| 148 | |
| 149 | return true; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Check if the element is present in the LCP data. |
| 154 | * |
| 155 | * @param string $buffer The HTML to check. |
| 156 | * @param string $tag The tag to check. Default is 'img'. |
| 157 | * @return WP_HTML_Tag_Processor|false The HTML tag processor if the element is present, false otherwise. |
| 158 | * |
| 159 | * @since 4.1.0 |
| 160 | */ |
| 161 | public function find_element( $buffer, $tag = 'img' ) { |
| 162 | $html_processor = new WP_HTML_Tag_Processor( $buffer ); |
| 163 | $element = new WP_HTML_Tag_Processor( $this->lcp_data['html'] ); |
| 164 | |
| 165 | // Ensure the LCP HTML is a valid tag before proceeding. |
| 166 | if ( ! $element->next_tag( $tag ) ) { |
| 167 | return false; |
| 168 | } |
| 169 | |
| 170 | // Extract attributes from the LCP tag for matching |
| 171 | $lcp_id = $element->get_attribute( 'id' ); |
| 172 | $lcp_class = $element->get_attribute( 'class' ); |
| 173 | |
| 174 | // Perform a quick check to see if the class is present in the HTML. |
| 175 | if ( ! empty( $lcp_class ) && ! str_contains( $buffer, $lcp_class ) ) { |
| 176 | return false; |
| 177 | } |
| 178 | |
| 179 | // Loop through all img tags in the buffer with the same class until we find a match. |
| 180 | // We do this because next_tag does not support matching on IDs and sources. |
| 181 | while ( $html_processor->next_tag( $tag ) ) { |
| 182 | // Tag is considered a match if the class and id match. |
| 183 | if ( $lcp_id === $html_processor->get_attribute( 'id' ) && |
| 184 | $lcp_class === $html_processor->get_attribute( 'class' ) ) { |
| 185 | return $html_processor; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | return false; |
| 190 | } |
| 191 | } |