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| 1 | <?php |
| 2 | /** |
| 3 | * Legacy Jetpack Tracks Client |
| 4 | * |
| 5 | * @package automattic/jetpack-tracking |
| 6 | */ |
| 7 | |
| 8 | use Automattic\Jetpack\Connection\Manager; |
| 9 | |
| 10 | /** |
| 11 | * Jetpack_Tracks_Client |
| 12 | * |
| 13 | * Send Tracks events on behalf of a user |
| 14 | * |
| 15 | * Example Usage: |
| 16 | ```php |
| 17 | require( dirname(__FILE__).'path/to/tracks/class-jetpack-tracks-client.php' ); |
| 18 | |
| 19 | $result = Jetpack_Tracks_Client::record_event( array( |
| 20 | '_en' => $event_name, // required |
| 21 | '_ui' => $user_id, // required unless _ul is provided |
| 22 | '_ul' => $user_login, // required unless _ui is provided |
| 23 | |
| 24 | // Optional, but recommended |
| 25 | '_ts' => $ts_in_ms, // Default: now |
| 26 | '_via_ip' => $client_ip, // we use it for geo, etc. |
| 27 | |
| 28 | // Possibly useful to set some context for the event |
| 29 | '_via_ua' => $client_user_agent, |
| 30 | '_via_url' => $client_url, |
| 31 | '_via_ref' => $client_referrer, |
| 32 | |
| 33 | // For user-targeted tests |
| 34 | 'abtest_name' => $abtest_name, |
| 35 | 'abtest_variation' => $abtest_variation, |
| 36 | |
| 37 | // Your application-specific properties |
| 38 | 'custom_property' => $some_value, |
| 39 | ) ); |
| 40 | |
| 41 | if ( is_wp_error( $result ) ) { |
| 42 | // Handle the error in your app |
| 43 | } |
| 44 | ``` |
| 45 | */ |
| 46 | class Jetpack_Tracks_Client { |
| 47 | const PIXEL = 'https://pixel.wp.com/t.gif'; |
| 48 | const BROWSER_TYPE = 'php-agent'; |
| 49 | const USER_AGENT_SLUG = 'tracks-client'; |
| 50 | const VERSION = '0.3'; |
| 51 | |
| 52 | /** |
| 53 | * Stores the Terms of Service Object Reference. |
| 54 | * |
| 55 | * @var null |
| 56 | */ |
| 57 | private static $terms_of_service = null; |
| 58 | |
| 59 | /** |
| 60 | * Record an event. |
| 61 | * |
| 62 | * @param mixed $event Event object to send to Tracks. An array will be cast to object. Required. |
| 63 | * Properties are included directly in the pixel query string after light validation. |
| 64 | * @return mixed True on success, WP_Error on failure |
| 65 | */ |
| 66 | public static function record_event( $event ) { |
| 67 | if ( ! self::$terms_of_service ) { |
| 68 | self::$terms_of_service = new \Automattic\Jetpack\Terms_Of_Service(); |
| 69 | } |
| 70 | |
| 71 | // Don't track users who have opted out or not agreed to our TOS, or are not running an active Jetpack. |
| 72 | if ( ! self::$terms_of_service->has_agreed() || ! empty( $_COOKIE['tk_opt-out'] ) ) { |
| 73 | return false; |
| 74 | } |
| 75 | |
| 76 | if ( ! $event instanceof Jetpack_Tracks_Event ) { |
| 77 | $event = new Jetpack_Tracks_Event( $event ); |
| 78 | } |
| 79 | if ( is_wp_error( $event ) ) { |
| 80 | return $event; |
| 81 | } |
| 82 | |
| 83 | $pixel = $event->build_pixel_url(); |
| 84 | |
| 85 | if ( ! $pixel ) { |
| 86 | return new WP_Error( 'invalid_pixel', 'cannot generate tracks pixel for given input', 400 ); |
| 87 | } |
| 88 | |
| 89 | return self::record_pixel( $pixel ); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Synchronously request the pixel. |
| 94 | * |
| 95 | * @param string $pixel The wp.com tracking pixel. |
| 96 | * @return array|bool|WP_Error True if successful. wp_remote_get response or WP_Error if not. |
| 97 | */ |
| 98 | public static function record_pixel( $pixel ) { |
| 99 | // Add the Request Timestamp and URL terminator just before the HTTP request. |
| 100 | $pixel .= '&_rt=' . self::build_timestamp() . '&_=_'; |
| 101 | |
| 102 | $response = wp_remote_get( |
| 103 | $pixel, |
| 104 | array( |
| 105 | 'blocking' => true, // The default, but being explicit here :). |
| 106 | 'timeout' => 1, |
| 107 | 'redirection' => 2, |
| 108 | 'httpversion' => '1.1', |
| 109 | 'user-agent' => self::get_user_agent(), |
| 110 | ) |
| 111 | ); |
| 112 | |
| 113 | if ( is_wp_error( $response ) ) { |
| 114 | return $response; |
| 115 | } |
| 116 | |
| 117 | $code = isset( $response['response']['code'] ) ? $response['response']['code'] : 0; |
| 118 | |
| 119 | if ( 200 !== $code ) { |
| 120 | return new WP_Error( 'request_failed', 'Tracks pixel request failed', $code ); |
| 121 | } |
| 122 | |
| 123 | return true; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Get the user agent. |
| 128 | * |
| 129 | * @return string The user agent. |
| 130 | */ |
| 131 | public static function get_user_agent() { |
| 132 | return self::USER_AGENT_SLUG . '-v' . self::VERSION; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Build an event and return its tracking URL |
| 137 | * |
| 138 | * @deprecated Call the `build_pixel_url` method on a Jetpack_Tracks_Event object instead. |
| 139 | * @param array $event Event keys and values. |
| 140 | * @return string URL of a tracking pixel. |
| 141 | */ |
| 142 | public static function build_pixel_url( $event ) { |
| 143 | $_event = new Jetpack_Tracks_Event( $event ); |
| 144 | return $_event->build_pixel_url(); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Validate input for a tracks event. |
| 149 | * |
| 150 | * @deprecated Instantiate a Jetpack_Tracks_Event object instead |
| 151 | * @param array $event Event keys and values. |
| 152 | * @return mixed Validated keys and values or WP_Error on failure |
| 153 | */ |
| 154 | private static function validate_and_sanitize( $event ) { |
| 155 | $_event = new Jetpack_Tracks_Event( $event ); |
| 156 | if ( is_wp_error( $_event ) ) { |
| 157 | return $_event; |
| 158 | } |
| 159 | return get_object_vars( $_event ); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Builds a timestamp. |
| 164 | * |
| 165 | * Milliseconds since 1970-01-01. |
| 166 | * |
| 167 | * @return string |
| 168 | */ |
| 169 | public static function build_timestamp() { |
| 170 | $ts = round( microtime( true ) * 1000 ); |
| 171 | return number_format( $ts, 0, '', '' ); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Grabs the user's anon id from cookies, or generates and sets a new one |
| 176 | * |
| 177 | * @return string An anon id for the user |
| 178 | */ |
| 179 | public static function get_anon_id() { |
| 180 | static $anon_id = null; |
| 181 | |
| 182 | if ( ! isset( $anon_id ) ) { |
| 183 | |
| 184 | // Did the browser send us a cookie? |
| 185 | if ( isset( $_COOKIE['tk_ai'] ) && preg_match( '#^[a-z]+:[A-Za-z0-9+/=]{24}$#', $_COOKIE['tk_ai'] ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- This is validating. |
| 186 | $anon_id = $_COOKIE['tk_ai']; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- This is validating. |
| 187 | } else { |
| 188 | |
| 189 | $binary = ''; |
| 190 | |
| 191 | // Generate a new anonId and try to save it in the browser's cookies. |
| 192 | // Note that base64-encoding an 18 character string generates a 24-character anon id. |
| 193 | for ( $i = 0; $i < 18; ++$i ) { |
| 194 | $binary .= chr( wp_rand( 0, 255 ) ); |
| 195 | } |
| 196 | |
| 197 | $anon_id = 'jetpack:' . base64_encode( $binary ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode |
| 198 | |
| 199 | if ( ! headers_sent() |
| 200 | && ! ( defined( 'REST_REQUEST' ) && REST_REQUEST ) |
| 201 | && ! ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) |
| 202 | ) { |
| 203 | setcookie( 'tk_ai', $anon_id, 0, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), false ); // phpcs:ignore Jetpack.Functions.SetCookie -- This is a random value and should be fine. |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | return $anon_id; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Gets the WordPress.com user's Tracks identity, if connected. |
| 213 | * |
| 214 | * @return array|bool |
| 215 | */ |
| 216 | public static function get_connected_user_tracks_identity() { |
| 217 | $user_data = ( new Manager() )->get_connected_user_data(); |
| 218 | if ( ! $user_data ) { |
| 219 | return false; |
| 220 | } |
| 221 | |
| 222 | return array( |
| 223 | 'blogid' => Jetpack_Options::get_option( 'id', 0 ), |
| 224 | 'email' => $user_data['email'], |
| 225 | 'userid' => $user_data['ID'], |
| 226 | 'username' => $user_data['login'], |
| 227 | 'user_locale' => $user_data['user_locale'], |
| 228 | ); |
| 229 | } |
| 230 | } |