476 lines
16 KiB
PHP
476 lines
16 KiB
PHP
<?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 = $netmask = false;
|
|
$ip_prefix = '';
|
|
|
|
// 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;
|
|
}
|
|
|
|
// Detect what kind of IP address this is.
|
|
$is_ipv6 = substr_count( $client_ip, ':' ) > 1;
|
|
$is_ipv4 = ( 3 === substr_count( $client_ip, '.' ) );
|
|
|
|
if ( $is_ipv6 && $is_ipv4 ) {
|
|
// IPv6 compatibility mode, temporarily strip the IPv6 part, and treat it like IPv4.
|
|
$ip_prefix = '::ffff:';
|
|
$client_ip = preg_replace( '/^\[?[0-9a-f:]*:/i', '', $client_ip );
|
|
$client_ip = str_replace( ']', '', $client_ip );
|
|
$is_ipv6 = false;
|
|
}
|
|
|
|
if ( $is_ipv6 ) {
|
|
// IPv6 addresses will always be enclosed in [] if there's a port.
|
|
$ip_start = 1;
|
|
$ip_end = (int) strpos( $client_ip, ']' ) - 1;
|
|
$netmask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000';
|
|
|
|
// Strip the port (and [] from IPv6 addresses), if they exist.
|
|
if ( $ip_end > 0 ) {
|
|
$client_ip = substr( $client_ip, $ip_start, $ip_end );
|
|
}
|
|
|
|
// Partially anonymize the IP by reducing it to the corresponding network ID.
|
|
if ( function_exists( 'inet_pton' ) && function_exists( 'inet_ntop' ) ) {
|
|
$client_ip = inet_ntop( inet_pton( $client_ip ) & inet_pton( $netmask ) );
|
|
}
|
|
} elseif ( $is_ipv4 ) {
|
|
// Strip any port and partially anonymize the IP.
|
|
$last_octet_position = strrpos( $client_ip, '.' );
|
|
$client_ip = substr( $client_ip, 0, $last_octet_position ) . '.0';
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
// Restore the IPv6 prefix to compatibility mode addresses.
|
|
return $ip_prefix . $client_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;
|
|
}
|
|
|
|
/**
|
|
* Discards expired events, and reduces the remaining list.
|
|
*
|
|
* @since 4.8.0
|
|
*
|
|
* @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'] ) ) {
|
|
$current_timestamp = current_time( 'timestamp' );
|
|
|
|
foreach ( $response_body['events'] as $key => $event ) {
|
|
// Skip WordCamps, because they might be multi-day events.
|
|
if ( 'meetup' !== $event['type'] ) {
|
|
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 );
|
|
}
|
|
|
|
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 )
|
|
)
|
|
);
|
|
}
|
|
}
|