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class-wp-community-events.php (18458B)

---

 <?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 false|array
 	 */
 	protected $user_location = false;
 
 	/**
 	 * Constructor for WP_Community_Events.
 	 *
 	 * @since 4.8.0
 	 *
 	 * @param int        $user_id       WP user ID.
 	 * @param false|array $user_location {
 	 *     Stored location data for the user. false to pass no 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
 	 * @since 5.5.2 Response no longer contains formatted date field. They're added
 	 *              in `wp.communityEvents.populateDynamicEventFields()` now.
 	 *
 	 * @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.
 		require 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'];
 			}
 
 			/*
 			 * Store the raw response, because events will expire before the cache does.
 			 * The response will need to be processed every page load.
 			 */
 			$this->cache_events( $response_body, $expiration );
 
 			$response_body['events'] = $this->trim_events( $response_body['events'] );
 
 			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 string|false 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 string|false Transient key on success, false on failure.
 	 */
 	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|false $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
 	 * @since 5.5.2 Response no longer contains formatted date field. They're added
 	 *              in `wp.communityEvents.populateDynamicEventFields()` now.
 	 *
 	 * @return array|false An array containing `location` and `events` items
 	 *                     on success, false on failure.
 	 */
 	public function get_cached_events() {
 		$cached_response = get_site_transient( $this->get_events_transient_key( $this->user_location ) );
 
 		if ( isset( $cached_response['events'] ) ) {
 			$cached_response['events'] = $this->trim_events( $cached_response['events'] );
 		}
 
 		return $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
 	 * @deprecated 5.6.0 No longer used in core.
 	 *
 	 * @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 ) {
 		_deprecated_function(
 			__METHOD__,
 			'5.5.2',
 			'This is no longer used by core, and only kept for backward compatibility.'
 		);
 
 		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://www.php.net/manual/datetime.format.php */
 				$formatted_date = date_i18n( __( 'l, M j, Y' ), $timestamp );
 				$formatted_time = date_i18n( get_option( 'time_format' ), $timestamp );
 
 				if ( isset( $event['end_date'] ) ) {
 					$end_timestamp      = strtotime( $event['end_date'] );
 					$formatted_end_date = date_i18n( __( 'l, M j, Y' ), $end_timestamp );
 
 					if ( 'meetup' !== $event['type'] && $formatted_end_date !== $formatted_date ) {
 						/* translators: Upcoming events month format. See https://www.php.net/manual/datetime.format.php */
 						$start_month = date_i18n( _x( 'F', 'upcoming events month format' ), $timestamp );
 						$end_month   = date_i18n( _x( 'F', 'upcoming events month format' ), $end_timestamp );
 
 						if ( $start_month === $end_month ) {
 							$formatted_date = sprintf(
 								/* translators: Date string for upcoming events. 1: Month, 2: Starting day, 3: Ending day, 4: Year. */
 								__( '%1$s %2$d–%3$d, %4$d' ),
 								$start_month,
 								/* translators: Upcoming events day format. See https://www.php.net/manual/datetime.format.php */
 								date_i18n( _x( 'j', 'upcoming events day format' ), $timestamp ),
 								date_i18n( _x( 'j', 'upcoming events day format' ), $end_timestamp ),
 								/* translators: Upcoming events year format. See https://www.php.net/manual/datetime.format.php */
 								date_i18n( _x( 'Y', 'upcoming events year format' ), $timestamp )
 							);
 						} else {
 							$formatted_date = sprintf(
 								/* translators: Date string for upcoming events. 1: Starting month, 2: Starting day, 3: Ending month, 4: Ending day, 5: Year. */
 								__( '%1$s %2$d – %3$s %4$d, %5$d' ),
 								$start_month,
 								date_i18n( _x( 'j', 'upcoming events day format' ), $timestamp ),
 								$end_month,
 								date_i18n( _x( 'j', 'upcoming events day format' ), $end_timestamp ),
 								date_i18n( _x( 'Y', 'upcoming events year format' ), $timestamp )
 							);
 						}
 
 						$formatted_date = wp_maybe_decline_date( $formatted_date, 'F j, Y' );
 					}
 				}
 
 				$response_body['events'][ $key ]['formatted_date'] = $formatted_date;
 				$response_body['events'][ $key ]['formatted_time'] = $formatted_time;
 			}
 		}
 
 		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.
 	 * @since 5.5.2 Accepts and returns only the events, rather than an entire HTTP response.
 	 *
 	 * @param array $events The events that will be prepared.
 	 * @return array The response body with events trimmed.
 	 */
 	protected function trim_events( array $events ) {
 		$future_events = array();
 
 		foreach ( $events as $event ) {
 			/*
 			 * The API's `date` and `end_date` fields are in the _event's_ local timezone, but UTC is needed so
 			 * it can be converted to the _user's_ local time.
 			 */
 			$end_time = (int) $event['end_unix_timestamp'];
 
 			if ( time() < $end_time ) {
 				array_push( $future_events, $event );
 			}
 		}
 
 		$future_wordcamps = array_filter(
 			$future_events,
 			function( $wordcamp ) {
 				return 'wordcamp' === $wordcamp['type'];
 			}
 		);
 
 		$future_wordcamps    = array_values( $future_wordcamps ); // Remove gaps in indices.
 		$trimmed_events      = array_slice( $future_events, 0, 3 );
 		$trimmed_event_types = wp_list_pluck( $trimmed_events, 'type' );
 
 		// Make sure the soonest upcoming WordCamp is pinned in the list.
 		if ( $future_wordcamps && ! in_array( 'wordcamp', $trimmed_event_types, true ) ) {
 			array_pop( $trimmed_events );
 			array_push( $trimmed_events, $future_wordcamps[0] );
 		}
 
 		return $trimmed_events;
 	}
 
 	/**
 	 * 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 )
 			)
 		);
 	}
 }