Ryan Malloy
0028738e33
Make your WordPress site irresistible. Natural SEO attraction with: - robots.txt management - sitemap.xml generation - LLMs.txt support - Google integration (Analytics, Search Console, Tag Manager) - Schema.org structured data - Open Graph / Twitter Card meta tags - AMP support - Visual elements gallery - Built-in backup/restore module Includes build.sh and .distignore for WordPress-installable release ZIPs.
332 lines
12 KiB
PHP
332 lines
12 KiB
PHP
<?php
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/**
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* AMP (Accelerated Mobile Pages) Module
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*
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* Handles AMP page generation and Signed Exchange (SXG) support
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*
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* @package TigerStyle_SEO
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* @subpackage Modules
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* @since 2.1.0
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*/
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// Prevent direct access
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if (!defined('ABSPATH')) {
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exit;
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}
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class TigerStyleSEO_AMP {
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private $options;
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private $cache_dir;
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private $sxg_enabled;
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/**
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* Single instance
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*/
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private static $instance = null;
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/**
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* Get instance
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*/
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public static function instance() {
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if (is_null(self::$instance)) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* Constructor
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*/
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private function __construct() {
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$this->options = get_option('tigerstyle_heat_amp', array());
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$this->cache_dir = WP_CONTENT_DIR . '/cache/tigerstyle-heat-amp/';
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$this->sxg_enabled = isset($this->options['sxg_enabled']) ? $this->options['sxg_enabled'] : false;
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$this->init();
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}
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/**
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* Initialize the module
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*/
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private function init() {
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// Create cache directory
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if (!file_exists($this->cache_dir)) {
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wp_mkdir_p($this->cache_dir);
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}
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// AMP detection and generation
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add_action('template_redirect', array($this, 'handle_amp_request'));
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add_action('wp_head', array($this, 'add_amp_link'));
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// SXG support
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if ($this->sxg_enabled) {
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add_action('template_redirect', array($this, 'handle_sxg_request'), 5);
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add_filter('wp_headers', array($this, 'add_sxg_headers'));
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}
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// Admin hooks
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if (is_admin()) {
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add_action('admin_post_update_amp_settings', array($this, 'handle_form_submission'));
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}
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}
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/**
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* Handle AMP requests
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*/
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public function handle_amp_request() {
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if (!isset($_GET['amp']) || is_admin()) {
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return;
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}
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// Generate AMP page
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$this->generate_amp_page();
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exit;
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}
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/**
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* Add AMP link to head
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*/
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public function add_amp_link() {
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if (is_singular() && !is_admin()) {
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$amp_url = add_query_arg('amp', '1', get_permalink());
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echo '<link rel="amphtml" href="' . esc_url($amp_url) . '">' . "\n";
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}
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}
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/**
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* Generate AMP page
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*/
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private function generate_amp_page() {
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// Basic AMP page structure
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?>
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<!doctype html>
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<html amp lang="<?php echo get_locale(); ?>">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
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<title><?php wp_title(); ?></title>
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<script async src="https://cdn.ampproject.org/v0.js"></script>
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<style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
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<style amp-custom>
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body { font-family: sans-serif; margin: 20px; }
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h1 { color: #333; }
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p { line-height: 1.6; }
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</style>
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</head>
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<body>
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<h1><?php the_title(); ?></h1>
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<div class="content">
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<?php
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if (have_posts()) {
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while (have_posts()) {
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the_post();
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the_content();
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}
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}
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?>
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</div>
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</body>
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</html>
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<?php
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}
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/**
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* Handle SXG requests
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*/
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public function handle_sxg_request() {
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if (!isset($_GET['sxg']) || !$this->sxg_enabled) {
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return;
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}
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// Check if SXG service is available
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if (!$this->is_sxg_service_available()) {
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wp_die('SXG service not available', 'Service Unavailable', ['response' => 503]);
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}
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$this->serve_signed_exchange();
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exit;
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}
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/**
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* Check if SXG service is available
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*/
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private function is_sxg_service_available() {
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return !empty($this->options['sxg_api_key']) && !empty($this->options['sxg_api_endpoint']);
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}
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/**
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* Serve Signed Exchange
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*/
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public function serve_signed_exchange() {
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$current_url = $this->get_current_url();
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// Check cache first
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$cache_key = 'sxg_' . md5($current_url);
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$cached_sxg = get_transient($cache_key);
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if ($cached_sxg !== false) {
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header('Content-Type: application/signed-exchange;v=b3');
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header('Cache-Control: public, max-age=300');
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echo $cached_sxg;
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return;
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}
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// Generate fresh SXG
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ob_start();
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$this->generate_amp_page();
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$amp_content = ob_get_clean();
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$sxg_data = $this->create_signed_exchange($amp_content, $current_url);
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if ($sxg_data) {
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// Cache for 5 minutes
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set_transient($cache_key, $sxg_data, 300);
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header('Content-Type: application/signed-exchange;v=b3');
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header('Cache-Control: public, max-age=300');
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echo $sxg_data;
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} else {
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wp_die('Failed to create signed exchange', 'SXG Error', ['response' => 500]);
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}
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}
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/**
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* Create signed exchange using API
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*/
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private function create_signed_exchange($content, $url) {
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$api_endpoint = $this->options['sxg_api_endpoint'];
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$api_key = $this->options['sxg_api_key'];
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$response = wp_remote_post($api_endpoint, array(
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'headers' => array(
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'Authorization' => 'Bearer ' . $api_key,
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'Content-Type' => 'application/json'
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),
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'body' => json_encode(array(
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'url' => $url,
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'content' => $content,
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'headers' => array(
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'content-type' => 'text/html; charset=utf-8'
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)
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)),
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'timeout' => 30
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));
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if (is_wp_error($response)) {
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error_log('TigerStyle Heat: SXG API error: ' . $response->get_error_message());
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return false;
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}
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$body = wp_remote_retrieve_body($response);
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$data = json_decode($body, true);
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if (isset($data['sxg_package'])) {
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return base64_decode($data['sxg_package']);
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}
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return false;
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}
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/**
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* Get current URL
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*/
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private function get_current_url() {
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return (is_ssl() ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
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}
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/**
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* Add SXG headers
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*/
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public function add_sxg_headers($headers) {
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if ($this->sxg_enabled && isset($_GET['amp'])) {
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$headers['Link'] = '</wp-content/cache/tigerstyle-heat-amp/sxg-cert.pem>; rel="alternate"; type="application/cert-chain+cbor"';
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$headers['Vary'] = 'Accept, AMP-Cache-Transform';
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}
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return $headers;
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}
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/**
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* Handle form submission
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*/
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public function handle_form_submission() {
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if (!isset($_POST['amp_nonce']) || !wp_verify_nonce($_POST['amp_nonce'], 'update_amp_settings')) {
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wp_die('Security check failed');
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}
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$options = array();
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$options['sxg_enabled'] = isset($_POST['sxg_enabled']) ? 1 : 0;
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$options['sxg_api_endpoint'] = sanitize_url($_POST['sxg_api_endpoint']);
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$options['sxg_api_key'] = sanitize_text_field($_POST['sxg_api_key']);
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update_option('tigerstyle_heat_amp', $options);
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wp_redirect(admin_url('admin.php?page=tigerstyle-heat#amp-tab&updated=1'));
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exit;
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}
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/**
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* Render admin page
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*/
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public function render_admin_page() {
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$options = $this->options;
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?>
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<div class="seo-info-box">
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<h3><?php _e('AMP & SXG Configuration', 'tigerstyle-heat'); ?></h3>
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<p class="description">
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<?php _e('Configure AMP (Accelerated Mobile Pages) and SXG (Signed Exchange) support for faster mobile loading.', 'tigerstyle-heat'); ?>
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</p>
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<form method="post" action="<?php echo admin_url('admin-post.php'); ?>">
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<input type="hidden" name="action" value="update_amp_settings">
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<?php wp_nonce_field('update_amp_settings', 'amp_nonce'); ?>
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<table class="form-table">
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<tr>
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<th scope="row"><?php _e('Enable SXG Support', 'tigerstyle-heat'); ?></th>
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<td>
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<label>
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<input type="checkbox" name="sxg_enabled" value="1" <?php checked(isset($options['sxg_enabled']) ? $options['sxg_enabled'] : 0, 1); ?>>
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<?php _e('Enable Signed Exchange support for AMP pages', 'tigerstyle-heat'); ?>
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</label>
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<p class="description"><?php _e('Requires valid SXG API credentials.', 'tigerstyle-heat'); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><?php _e('SXG API Endpoint', 'tigerstyle-heat'); ?></th>
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<td>
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<input type="url" name="sxg_api_endpoint" value="<?php echo esc_attr(isset($options['sxg_api_endpoint']) ? $options['sxg_api_endpoint'] : ''); ?>" class="regular-text">
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<p class="description"><?php _e('SXG API service endpoint URL.', 'tigerstyle-heat'); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><?php _e('SXG API Key', 'tigerstyle-heat'); ?></th>
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<td>
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<input type="password" name="sxg_api_key" value="<?php echo esc_attr(isset($options['sxg_api_key']) ? $options['sxg_api_key'] : ''); ?>" class="regular-text">
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<p class="description"><?php _e('API key for SXG service authentication.', 'tigerstyle-heat'); ?></p>
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</td>
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</tr>
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</table>
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<p class="submit">
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<input type="submit" name="submit" class="button button-primary" value="<?php _e('Save AMP Settings', 'tigerstyle-heat'); ?>">
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</p>
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</form>
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</div>
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<div class="seo-info-box">
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<h4><?php _e('AMP Status', 'tigerstyle-heat'); ?></h4>
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<p>
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<?php _e('AMP pages are automatically generated for all posts and pages.', 'tigerstyle-heat'); ?>
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<?php if (is_singular()): ?>
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<br><strong><?php _e('Current page AMP URL:', 'tigerstyle-heat'); ?></strong>
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<a href="<?php echo add_query_arg('amp', '1', get_permalink()); ?>" target="_blank">
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<?php echo add_query_arg('amp', '1', get_permalink()); ?>
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</a>
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<?php endif; ?>
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</p>
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</div>
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<?php
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}
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}
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