<?php
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if (!defined('ABSPATH')) {
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exit;
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}
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/**
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* Cache Stuffs
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*/
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/**
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* Update cache timestamps when content is modified
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* This helps us reduce database requests and only update a content cache when necessary
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*/
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/**
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* @param string $type
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* @param object|null $item
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*
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* @return array
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*/
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function jvbUpdateCacheTimestamp(string $type, object|null $item = null):array
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{
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$timestamps = jvbGetCache();
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$current_time = time();
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// Handle different types of updates
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switch ($type) {
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case 'term':
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// Get term and update its taxonomy timestamp
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$taxonomy = str_replace(BASE, '', $item->taxonomy);
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$timestamps[ $taxonomy ] = $current_time;
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JVBase\managers\CacheManager::invalidateGroup($taxonomy);
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JVBase\managers\CacheManager::invalidateGroup('terms');
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break;
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case 'post':
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// Update specific post type timestamp
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$post_type = str_replace(BASE, '', $item->postType);
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$timestamps[$post_type] = $current_time;
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JVBase\managers\CacheManager::invalidateGroup($post_type);
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break;
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default:
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$timestamps[$type] = $current_time;
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JVBase\managers\CacheManager::invalidateGroup($type);
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break;
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}
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update_option('jvb_cache', $timestamps);
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return $timestamps;
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}
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// Hook into WordPress content changes
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add_action('save_post', function ($post_id, $post, $update) {
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if (jvbNoSaveIt($post_id, $post)) {
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return;
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}
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if (!in_array($post->post_type, jvbBasedFeedContent())) {
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return;
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}
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jvbUpdateCacheTimestamp('post', $post);
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}, 10, 3);
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add_action('edited_term', function ($term_id, $tt_id, $taxonomy) {
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jvbUpdateCacheTimestamp('term', get_term($term_id, $taxonomy));
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}, 10, 3);
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add_action('created_term', function ($term_id, $tt_id, $taxonomy) {
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jvbUpdateCacheTimestamp('term', get_term($term_id, $taxonomy));
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}, 10, 3);
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add_action('rest_api_init', function () {
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register_rest_route('jvb/v1', '/cachedContent', [
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'methods' => 'GET',
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'callback' => 'jvbCacheCheck',
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'permission_callback' => '__return_true' // Public endpoint
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]);
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});
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function jvbCacheCheck(WP_REST_Request $request):WP_REST_Response
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{
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// Get the cache timestamps
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$timestamps = jvbGetCache();
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$data = $request->get_params();
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error_log('Cache request: '.print_r($data, true));
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// Set Last-Modified header for conditional requests
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$last_update = 0;
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foreach ($timestamps as $type) {
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if ($type > $last_update) {
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$last_update = $type;
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}
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}
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if ($last_update > 0) {
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header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $last_update) . ' GMT');
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}
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// Check If-Modified-Since header
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$if_modified_since = $request->get_header('if-modified-since');
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if ($if_modified_since) {
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$if_modified_since = strtotime($if_modified_since);
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if ($last_update <= $if_modified_since) {
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// Return 304 Not Modified if nothing has changed
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return new WP_REST_Response(null, 304);
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}
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}
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// Add cache control headers
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header('Cache-Control: max-age=60, must-revalidate');
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return new WP_REST_Response($timestamps);
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}
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function jvbGetCache():array
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{
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$timestamps = get_option('jvb_cache');
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if (!$timestamps) {
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$timestamps = [];
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$keys = JVB()->registeredContent();
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$currentTime = time();
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foreach ($keys as $key) {
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$timestamps[$key] = $currentTime;
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}
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update_option('jvb_cache', $timestamps);
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}
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return $timestamps;
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}
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