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| 1 | <?php |
| 2 | /** |
| 3 | * Class Jetpack_Tracks_Event. Legacy. |
| 4 | * |
| 5 | * @package automattic/jetpack-sync |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Example Usage: |
| 10 | ```php |
| 11 | require_once( dirname(__FILE__) . 'path/to/tracks/class-jetpack-tracks-event.php' ); |
| 12 | |
| 13 | $event = new Jetpack_Tracks_Event( array( |
| 14 | '_en' => $event_name, // required |
| 15 | '_ui' => $user_id, // required unless _ul is provided |
| 16 | '_ul' => $user_login, // required unless _ui is provided |
| 17 | |
| 18 | // Optional, but recommended |
| 19 | '_via_ip' => $client_ip, // for geo, etc. |
| 20 | |
| 21 | // Possibly useful to set some context for the event |
| 22 | '_via_ua' => $client_user_agent, |
| 23 | '_via_url' => $client_url, |
| 24 | '_via_ref' => $client_referrer, |
| 25 | |
| 26 | // For user-targeted tests |
| 27 | 'abtest_name' => $abtest_name, |
| 28 | 'abtest_variation' => $abtest_variation, |
| 29 | |
| 30 | // Your application-specific properties |
| 31 | 'custom_property' => $some_value, |
| 32 | ) ); |
| 33 | |
| 34 | if ( is_wp_error( $event->error ) ) { |
| 35 | // Handle the error in your app |
| 36 | } |
| 37 | |
| 38 | $bump_and_redirect_pixel = $event->build_signed_pixel_url(); |
| 39 | ``` |
| 40 | */ |
| 41 | |
| 42 | /** |
| 43 | * Class Jetpack_Tracks_Event |
| 44 | */ |
| 45 | #[AllowDynamicProperties] |
| 46 | class Jetpack_Tracks_Event { |
| 47 | const EVENT_NAME_REGEX = '/^(([a-z0-9]+)_){2}([a-z0-9_]+)$/'; |
| 48 | const PROP_NAME_REGEX = '/^[a-z_][a-z0-9_]*$/'; |
| 49 | |
| 50 | /** |
| 51 | * Tracks Event Error. |
| 52 | * |
| 53 | * @var mixed Error. |
| 54 | */ |
| 55 | public $error; |
| 56 | |
| 57 | /** |
| 58 | * Jetpack_Tracks_Event constructor. |
| 59 | * |
| 60 | * @param object $event Tracks event. |
| 61 | */ |
| 62 | public function __construct( $event ) { |
| 63 | $_event = self::validate_and_sanitize( $event ); |
| 64 | if ( is_wp_error( $_event ) ) { |
| 65 | $this->error = $_event; |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | foreach ( $_event as $key => $value ) { |
| 70 | $this->{$key} = $value; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Record a track event. |
| 76 | */ |
| 77 | public function record() { |
| 78 | return Jetpack_Tracks_Client::record_event( $this ); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Annotate the event with all relevant info. |
| 83 | * |
| 84 | * @param mixed $event Object or (flat) array. |
| 85 | * @return mixed The transformed event array or WP_Error on failure. |
| 86 | */ |
| 87 | public static function validate_and_sanitize( $event ) { |
| 88 | $event = (object) $event; |
| 89 | |
| 90 | // Required. |
| 91 | if ( ! $event->_en ) { |
| 92 | return new WP_Error( 'invalid_event', 'A valid event must be specified via `_en`', 400 ); |
| 93 | } |
| 94 | |
| 95 | // delete non-routable addresses otherwise geoip will discard the record entirely. |
| 96 | if ( property_exists( $event, '_via_ip' ) && preg_match( '/^192\.168|^10\./', $event->_via_ip ) ) { |
| 97 | unset( $event->_via_ip ); |
| 98 | } |
| 99 | |
| 100 | $validated = array( |
| 101 | 'browser_type' => Jetpack_Tracks_Client::BROWSER_TYPE, |
| 102 | '_aua' => Jetpack_Tracks_Client::get_user_agent(), |
| 103 | ); |
| 104 | |
| 105 | $_event = (object) array_merge( (array) $event, $validated ); |
| 106 | |
| 107 | // If you want to block property names, do it here. |
| 108 | |
| 109 | // Make sure we have an event timestamp. |
| 110 | if ( ! isset( $_event->_ts ) ) { |
| 111 | $_event->_ts = Jetpack_Tracks_Client::build_timestamp(); |
| 112 | } |
| 113 | |
| 114 | return $_event; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Build a pixel URL that will send a Tracks event when fired. |
| 119 | * On error, returns an empty string (''). |
| 120 | * |
| 121 | * @return string A pixel URL or empty string ('') if there were invalid args. |
| 122 | */ |
| 123 | public function build_pixel_url() { |
| 124 | if ( $this->error ) { |
| 125 | return ''; |
| 126 | } |
| 127 | |
| 128 | $args = get_object_vars( $this ); |
| 129 | |
| 130 | // Request Timestamp and URL Terminator must be added just before the HTTP request or not at all. |
| 131 | unset( $args['_rt'] ); |
| 132 | unset( $args['_'] ); |
| 133 | |
| 134 | $validated = self::validate_and_sanitize( $args ); |
| 135 | |
| 136 | if ( is_wp_error( $validated ) ) { |
| 137 | return ''; |
| 138 | } |
| 139 | |
| 140 | return Jetpack_Tracks_Client::PIXEL . '?' . http_build_query( $validated ); |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Validate the event name. |
| 145 | * |
| 146 | * @param string $name Event name. |
| 147 | * @return false|int |
| 148 | */ |
| 149 | public static function event_name_is_valid( $name ) { |
| 150 | return preg_match( self::EVENT_NAME_REGEX, $name ); |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Validates prop name |
| 155 | * |
| 156 | * @param string $name Property name. |
| 157 | * |
| 158 | * @return false|int Truthy value. |
| 159 | */ |
| 160 | public static function prop_name_is_valid( $name ) { |
| 161 | return preg_match( self::PROP_NAME_REGEX, $name ); |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Scrutinize event name. |
| 166 | * |
| 167 | * @param object $event Tracks event. |
| 168 | */ |
| 169 | public static function scrutinize_event_names( $event ) { |
| 170 | if ( ! self::event_name_is_valid( $event->_en ) ) { |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | $whitelisted_key_names = array( |
| 175 | 'anonId', |
| 176 | 'Browser_Type', |
| 177 | ); |
| 178 | |
| 179 | foreach ( array_keys( (array) $event ) as $key ) { |
| 180 | if ( in_array( $key, $whitelisted_key_names, true ) ) { |
| 181 | continue; |
| 182 | } |
| 183 | if ( ! self::prop_name_is_valid( $key ) ) { |
| 184 | return; |
| 185 | } |
| 186 | } |
| 187 | } |
| 188 | } |