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+<?php
+/**
+ * Administration: Community Events class.
+ *
+ * @package WordPress
+ * @subpackage Administration
+ * @since 4.8.0
+ */
+
+/**
+ * Class WP_Community_Events.
+ *
+ * A client for api.wordpress.org/events.
+ *
+ * @since 4.8.0
+ */
+class WP_Community_Events {
+ /**
+ * ID for a WordPress user account.
+ *
+ * @since 4.8.0
+ *
+ * @var int
+ */
+ protected $user_id = 0;
+
+ /**
+ * Stores location data for the user.
+ *
+ * @since 4.8.0
+ *
+ * @var bool|array
+ */
+ protected $user_location = false;
+
+ /**
+ * Constructor for WP_Community_Events.
+ *
+ * @since 4.8.0
+ *
+ * @param int $user_id WP user ID.
+ * @param bool|array $user_location Stored location data for the user.
+ * false to pass no location;
+ * array to pass a location {
+ * @type string $description The name of the location
+ * @type string $latitude The latitude in decimal degrees notation, without the degree
+ * symbol. e.g.: 47.615200.
+ * @type string $longitude The longitude in decimal degrees notation, without the degree
+ * symbol. e.g.: -122.341100.
+ * @type string $country The ISO 3166-1 alpha-2 country code. e.g.: BR
+ * }
+ */
+ public function __construct( $user_id, $user_location = false ) {
+ $this->user_id = absint( $user_id );
+ $this->user_location = $user_location;
+ }
+
+ /**
+ * Gets data about events near a particular location.
+ *
+ * Cached events will be immediately returned if the `user_location` property
+ * is set for the current user, and cached events exist for that location.
+ *
+ * Otherwise, this method sends a request to the w.org Events API with location
+ * data. The API will send back a recognized location based on the data, along
+ * with nearby events.
+ *
+ * The browser's request for events is proxied with this method, rather
+ * than having the browser make the request directly to api.wordpress.org,
+ * because it allows results to be cached server-side and shared with other
+ * users and sites in the network. This makes the process more efficient,
+ * since increasing the number of visits that get cached data means users
+ * don't have to wait as often; if the user's browser made the request
+ * directly, it would also need to make a second request to WP in order to
+ * pass the data for caching. Having WP make the request also introduces
+ * the opportunity to anonymize the IP before sending it to w.org, which
+ * mitigates possible privacy concerns.
+ *
+ * @since 4.8.0
+ *
+ * @param string $location_search Optional. City name to help determine the location.
+ * e.g., "Seattle". Default empty string.
+ * @param string $timezone Optional. Timezone to help determine the location.
+ * Default empty string.
+ * @return array|WP_Error A WP_Error on failure; an array with location and events on
+ * success.
+ */
+ public function get_events( $location_search = '', $timezone = '' ) {
+ $cached_events = $this->get_cached_events();
+
+ if ( ! $location_search && $cached_events ) {
+ return $cached_events;
+ }
+
+ // include an unmodified $wp_version
+ include( ABSPATH . WPINC . '/version.php' );
+
+ $api_url = 'http://api.wordpress.org/events/1.0/';
+ $request_args = $this->get_request_args( $location_search, $timezone );
+ $request_args['user-agent'] = 'WordPress/' . $wp_version . '; ' . home_url( '/' );
+
+ if ( wp_http_supports( array( 'ssl' ) ) ) {
+ $api_url = set_url_scheme( $api_url, 'https' );
+ }
+
+ $response = wp_remote_get( $api_url, $request_args );
+ $response_code = wp_remote_retrieve_response_code( $response );
+ $response_body = json_decode( wp_remote_retrieve_body( $response ), true );
+ $response_error = null;
+
+ if ( is_wp_error( $response ) ) {
+ $response_error = $response;
+ } elseif ( 200 !== $response_code ) {
+ $response_error = new WP_Error(
+ 'api-error',
+ /* translators: %d: numeric HTTP status code, e.g. 400, 403, 500, 504, etc. */
+ sprintf( __( 'Invalid API response code (%d)' ), $response_code )
+ );
+ } elseif ( ! isset( $response_body['location'], $response_body['events'] ) ) {
+ $response_error = new WP_Error(
+ 'api-invalid-response',
+ isset( $response_body['error'] ) ? $response_body['error'] : __( 'Unknown API error.' )
+ );
+ }
+
+ if ( is_wp_error( $response_error ) ) {
+ return $response_error;
+ } else {
+ $expiration = false;
+
+ if ( isset( $response_body['ttl'] ) ) {
+ $expiration = $response_body['ttl'];
+ unset( $response_body['ttl'] );
+ }
+
+ /*
+ * The IP in the response is usually the same as the one that was sent
+ * in the request, but in some cases it is different. In those cases,
+ * it's important to reset it back to the IP from the request.
+ *
+ * For example, if the IP sent in the request is private (e.g., 192.168.1.100),
+ * then the API will ignore that and use the corresponding public IP instead,
+ * and the public IP will get returned. If the public IP were saved, though,
+ * then get_cached_events() would always return `false`, because the transient
+ * would be generated based on the public IP when saving the cache, but generated
+ * based on the private IP when retrieving the cache.
+ */
+ if ( ! empty( $response_body['location']['ip'] ) ) {
+ $response_body['location']['ip'] = $request_args['body']['ip'];
+ }
+
+ /*
+ * The API doesn't return a description for latitude/longitude requests,
+ * but the description is already saved in the user location, so that
+ * one can be used instead.
+ */
+ if ( $this->coordinates_match( $request_args['body'], $response_body['location'] ) && empty( $response_body['location']['description'] ) ) {
+ $response_body['location']['description'] = $this->user_location['description'];
+ }
+
+ $this->cache_events( $response_body, $expiration );
+
+ $response_body = $this->trim_events( $response_body );
+ $response_body = $this->format_event_data_time( $response_body );
+
+ return $response_body;
+ }
+ }
+
+ /**
+ * Builds an array of args to use in an HTTP request to the w.org Events API.
+ *
+ * @since 4.8.0
+ *
+ * @param string $search Optional. City search string. Default empty string.
+ * @param string $timezone Optional. Timezone string. Default empty string.
+ * @return array The request args.
+ */
+ protected function get_request_args( $search = '', $timezone = '' ) {
+ $args = array(
+ 'number' => 5, // Get more than three in case some get trimmed out.
+ 'ip' => self::get_unsafe_client_ip(),
+ );
+
+ /*
+ * Include the minimal set of necessary arguments, in order to increase the
+ * chances of a cache-hit on the API side.
+ */
+ if ( empty( $search ) && isset( $this->user_location['latitude'], $this->user_location['longitude'] ) ) {
+ $args['latitude'] = $this->user_location['latitude'];
+ $args['longitude'] = $this->user_location['longitude'];
+ } else {
+ $args['locale'] = get_user_locale( $this->user_id );
+
+ if ( $timezone ) {
+ $args['timezone'] = $timezone;
+ }
+
+ if ( $search ) {
+ $args['location'] = $search;
+ }
+ }
+
+ // Wrap the args in an array compatible with the second parameter of `wp_remote_get()`.
+ return array(
+ 'body' => $args,
+ );
+ }
+
+ /**
+ * Determines the user's actual IP address and attempts to partially
+ * anonymize an IP address by converting it to a network ID.
+ *
+ * Geolocating the network ID usually returns a similar location as the
+ * actual IP, but provides some privacy for the user.
+ *
+ * $_SERVER['REMOTE_ADDR'] cannot be used in all cases, such as when the user
+ * is making their request through a proxy, or when the web server is behind
+ * a proxy. In those cases, $_SERVER['REMOTE_ADDR'] is set to the proxy address rather
+ * than the user's actual address.
+ *
+ * Modified from https://stackoverflow.com/a/2031935/450127, MIT license.
+ * Modified from https://github.com/geertw/php-ip-anonymizer, MIT license.
+ *
+ * SECURITY WARNING: This function is _NOT_ intended to be used in
+ * circumstances where the authenticity of the IP address matters. This does
+ * _NOT_ guarantee that the returned address is valid or accurate, and it can
+ * be easily spoofed.
+ *
+ * @since 4.8.0
+ *
+ * @return false|string The anonymized address on success; the given address
+ * or false on failure.
+ */
+ public static function get_unsafe_client_ip() {
+ $client_ip = false;
+
+ // In order of preference, with the best ones for this purpose first.
+ $address_headers = array(
+ 'HTTP_CLIENT_IP',
+ 'HTTP_X_FORWARDED_FOR',
+ 'HTTP_X_FORWARDED',
+ 'HTTP_X_CLUSTER_CLIENT_IP',
+ 'HTTP_FORWARDED_FOR',
+ 'HTTP_FORWARDED',
+ 'REMOTE_ADDR',
+ );
+
+ foreach ( $address_headers as $header ) {
+ if ( array_key_exists( $header, $_SERVER ) ) {
+ /*
+ * HTTP_X_FORWARDED_FOR can contain a chain of comma-separated
+ * addresses. The first one is the original client. It can't be
+ * trusted for authenticity, but we don't need to for this purpose.
+ */
+ $address_chain = explode( ',', $_SERVER[ $header ] );
+ $client_ip = trim( $address_chain[0] );
+
+ break;
+ }
+ }
+
+ if ( ! $client_ip ) {
+ return false;
+ }
+
+ $anon_ip = wp_privacy_anonymize_ip( $client_ip, true );
+
+ if ( '0.0.0.0' === $anon_ip || '::' === $anon_ip ) {
+ return false;
+ }
+
+ return $anon_ip;
+ }
+
+ /**
+ * Test if two pairs of latitude/longitude coordinates match each other.
+ *
+ * @since 4.8.0
+ *
+ * @param array $a The first pair, with indexes 'latitude' and 'longitude'.
+ * @param array $b The second pair, with indexes 'latitude' and 'longitude'.
+ * @return bool True if they match, false if they don't.
+ */
+ protected function coordinates_match( $a, $b ) {
+ if ( ! isset( $a['latitude'], $a['longitude'], $b['latitude'], $b['longitude'] ) ) {
+ return false;
+ }
+
+ return $a['latitude'] === $b['latitude'] && $a['longitude'] === $b['longitude'];
+ }
+
+ /**
+ * Generates a transient key based on user location.
+ *
+ * This could be reduced to a one-liner in the calling functions, but it's
+ * intentionally a separate function because it's called from multiple
+ * functions, and having it abstracted keeps the logic consistent and DRY,
+ * which is less prone to errors.
+ *
+ * @since 4.8.0
+ *
+ * @param array $location Should contain 'latitude' and 'longitude' indexes.
+ * @return bool|string false on failure, or a string on success.
+ */
+ protected function get_events_transient_key( $location ) {
+ $key = false;
+
+ if ( isset( $location['ip'] ) ) {
+ $key = 'community-events-' . md5( $location['ip'] );
+ } elseif ( isset( $location['latitude'], $location['longitude'] ) ) {
+ $key = 'community-events-' . md5( $location['latitude'] . $location['longitude'] );
+ }
+
+ return $key;
+ }
+
+ /**
+ * Caches an array of events data from the Events API.
+ *
+ * @since 4.8.0
+ *
+ * @param array $events Response body from the API request.
+ * @param int|bool $expiration Optional. Amount of time to cache the events. Defaults to false.
+ * @return bool true if events were cached; false if not.
+ */
+ protected function cache_events( $events, $expiration = false ) {
+ $set = false;
+ $transient_key = $this->get_events_transient_key( $events['location'] );
+ $cache_expiration = $expiration ? absint( $expiration ) : HOUR_IN_SECONDS * 12;
+
+ if ( $transient_key ) {
+ $set = set_site_transient( $transient_key, $events, $cache_expiration );
+ }
+
+ return $set;
+ }
+
+ /**
+ * Gets cached events.
+ *
+ * @since 4.8.0
+ *
+ * @return false|array false on failure; an array containing `location`
+ * and `events` items on success.
+ */
+ public function get_cached_events() {
+ $cached_response = get_site_transient( $this->get_events_transient_key( $this->user_location ) );
+ $cached_response = $this->trim_events( $cached_response );
+
+ return $this->format_event_data_time( $cached_response );
+ }
+
+ /**
+ * Adds formatted date and time items for each event in an API response.
+ *
+ * This has to be called after the data is pulled from the cache, because
+ * the cached events are shared by all users. If it was called before storing
+ * the cache, then all users would see the events in the localized data/time
+ * of the user who triggered the cache refresh, rather than their own.
+ *
+ * @since 4.8.0
+ *
+ * @param array $response_body The response which contains the events.
+ * @return array The response with dates and times formatted.
+ */
+ protected function format_event_data_time( $response_body ) {
+ if ( isset( $response_body['events'] ) ) {
+ foreach ( $response_body['events'] as $key => $event ) {
+ $timestamp = strtotime( $event['date'] );
+
+ /*
+ * The `date_format` option is not used because it's important
+ * in this context to keep the day of the week in the formatted date,
+ * so that users can tell at a glance if the event is on a day they
+ * are available, without having to open the link.
+ */
+ /* translators: Date format for upcoming events on the dashboard. Include the day of the week. See https://secure.php.net/date. */
+ $response_body['events'][ $key ]['formatted_date'] = date_i18n( __( 'l, M j, Y' ), $timestamp );
+ $response_body['events'][ $key ]['formatted_time'] = date_i18n( get_option( 'time_format' ), $timestamp );
+ }
+ }
+
+ return $response_body;
+ }
+
+ /**
+ * Prepares the event list for presentation.
+ *
+ * Discards expired events, and makes WordCamps "sticky." Attendees need more
+ * advanced notice about WordCamps than they do for meetups, so camps should
+ * appear in the list sooner. If a WordCamp is coming up, the API will "stick"
+ * it in the response, even if it wouldn't otherwise appear. When that happens,
+ * the event will be at the end of the list, and will need to be moved into a
+ * higher position, so that it doesn't get trimmed off.
+ *
+ * @since 4.8.0
+ * @since 4.9.7 Stick a WordCamp to the final list.
+ *
+ * @param array $response_body The response body which contains the events.
+ * @return array The response body with events trimmed.
+ */
+ protected function trim_events( $response_body ) {
+ if ( isset( $response_body['events'] ) ) {
+ $wordcamps = array();
+ $current_timestamp = current_time( 'timestamp' );
+
+ foreach ( $response_body['events'] as $key => $event ) {
+ /*
+ * Skip WordCamps, because they might be multi-day events.
+ * Save a copy so they can be pinned later.
+ */
+ if ( 'wordcamp' === $event['type'] ) {
+ $wordcamps[] = $event;
+ continue;
+ }
+
+ $event_timestamp = strtotime( $event['date'] );
+
+ if ( $current_timestamp > $event_timestamp && ( $current_timestamp - $event_timestamp ) > DAY_IN_SECONDS ) {
+ unset( $response_body['events'][ $key ] );
+ }
+ }
+
+ $response_body['events'] = array_slice( $response_body['events'], 0, 3 );
+ $trimmed_event_types = wp_list_pluck( $response_body['events'], 'type' );
+
+ // Make sure the soonest upcoming WordCamp is pinned in the list.
+ if ( ! in_array( 'wordcamp', $trimmed_event_types ) && $wordcamps ) {
+ array_pop( $response_body['events'] );
+ array_push( $response_body['events'], $wordcamps[0] );
+ }
+ }
+
+ return $response_body;
+ }
+
+ /**
+ * Logs responses to Events API requests.
+ *
+ * @since 4.8.0
+ * @deprecated 4.9.0 Use a plugin instead. See #41217 for an example.
+ *
+ * @param string $message A description of what occurred.
+ * @param array $details Details that provide more context for the
+ * log entry.
+ */
+ protected function maybe_log_events_response( $message, $details ) {
+ _deprecated_function( __METHOD__, '4.9.0' );
+
+ if ( ! WP_DEBUG_LOG ) {
+ return;
+ }
+
+ error_log(
+ sprintf(
+ '%s: %s. Details: %s',
+ __METHOD__,
+ trim( $message, '.' ),
+ wp_json_encode( $details )
+ )
+ );
+ }
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-04-23 11:58:46 +0000