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121 lines
2.9 KiB
PHP
121 lines
2.9 KiB
PHP
<?php
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/**
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* Community events API.
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*
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* Powers the dashboard events widget.
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*
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* We store the cache for two hours, but update hourly, to ensure we always hit
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* the cache.
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*/
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namespace FAIRServer\API\Events;
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use FAIRServer\API;
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use WP_Error;
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use WP_HTTP;
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use WP_REST_Request;
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use WP_REST_Response;
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use WP_REST_Server;
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const CACHE_GROUP = 'fairserver';
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const CACHE_KEY = 'events';
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const CACHE_LIFETIME = 2 * HOUR_IN_SECONDS;
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const CRON_HOOK = 'fairserver_events_cron';
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const CRON_SCHEDULE = 'hourly';
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const HTTP_CACHE_MAXAGE = 10 * MINUTE_IN_SECONDS;
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const HTTP_CACHE_SWR = 50 * MINUTE_IN_SECONDS;
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const SOURCE_URL = 'https://thewp.world/wp-json/wp/v2/wordcamp?per_page=100';
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/**
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* Bootstrap events API.
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*/
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function bootstrap() : void {
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add_action( 'init', __NAMESPACE__ . '\\schedule_cron' );
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add_action( 'rest_api_init', __NAMESPACE__ . '\\register_routes' );
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add_action( CRON_HOOK, __NAMESPACE__ . '\\refresh_events' );
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}
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/**
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* Pull data on an hourly basis.
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*/
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function schedule_cron() : void {
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if ( ! wp_next_scheduled( CRON_HOOK ) ) {
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wp_schedule_event( time(), CRON_SCHEDULE, CRON_HOOK );
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}
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}
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/**
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* Register the REST API routes.
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*/
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function register_routes() : void {
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register_rest_route( API\API_NAMESPACE, '/events', [
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'methods' => WP_REST_Server::READABLE,
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'callback' => __NAMESPACE__ . '\get_events',
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'permission_callback' => '__return_true',
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] );
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}
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/**
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* Refresh events data from thewp.world.
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*
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* This is refreshed hourly, so we always refresh before the cache expires.
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*/
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function refresh_events() : void {
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$response = wp_remote_get( SOURCE_URL, [
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'user-agent' => 'FAIR Server/1.0',
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] );
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if ( is_wp_error( $response ) ) {
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trigger_error(
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'Failed to fetch events from thewp.world: ' . $response->get_error_message(),
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E_USER_WARNING
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);
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return;
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}
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$body = wp_remote_retrieve_body( $response );
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if ( empty( $body ) ) {
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trigger_error(
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'Failed to fetch events from thewp.world: Empty response body',
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E_USER_WARNING
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);
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return;
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}
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$events = json_decode( $body, true );
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if ( json_last_error() !== JSON_ERROR_NONE ) {
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trigger_error(
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'Failed to decode events from thewp.world: ' . json_last_error_msg(),
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E_USER_WARNING
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);
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return;
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}
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wp_cache_set( CACHE_KEY, $events, CACHE_GROUP, CACHE_LIFETIME );
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}
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/**
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* Get the latest community events.
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*
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* @param WP_REST_Request $request The request object.
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* @return WP_REST_Response|WP_Error Response object on success or error.
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*/
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function get_events( WP_REST_Request $request ) {
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$data = wp_cache_get( CACHE_KEY, CACHE_GROUP );
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if ( ! $data ) {
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return new WP_Error(
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'fairserver.events.not_found',
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'Unable to fetch events.',
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[ 'status' => WP_Http::INTERNAL_SERVER_ERROR ]
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);
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}
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$response = rest_ensure_response( $data );
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$response->header(
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'Cache-Control',
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sprintf(
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'max-age=%d, stale-while-revalidate=%d',
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HTTP_CACHE_MAXAGE,
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HTTP_CACHE_SWR
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)
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);
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return $response;
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}
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