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| 1 | <?php |
| 2 | /** |
| 3 | * Stats in the WordPress admin bar. |
| 4 | * |
| 5 | * @package automattic/jetpack-stats-admin |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Stats_Admin; |
| 9 | |
| 10 | use Automattic\Jetpack\Assets; |
| 11 | use Automattic\Jetpack\Connection\Client; |
| 12 | use Automattic\Jetpack\Constants; |
| 13 | use Automattic\Jetpack\Feature_Flags\Feature_Flags; |
| 14 | use Automattic\Jetpack\Stats\Options as Stats_Options; |
| 15 | use Automattic\Jetpack\Status\Host; |
| 16 | |
| 17 | /** |
| 18 | * Adds the views chart and a Stats link to the admin bar. |
| 19 | */ |
| 20 | class Admin_Bar { |
| 21 | /** |
| 22 | * The admin bar charts WordPress.com draws, at 1x and 2x. |
| 23 | * |
| 24 | * @var string[] |
| 25 | */ |
| 26 | const CHARTS = array( 'admin-bar-hours-scale', 'admin-bar-hours-scale-2x' ); |
| 27 | |
| 28 | /** |
| 29 | * The admin-post.php action that serves a chart. |
| 30 | * |
| 31 | * @var string |
| 32 | */ |
| 33 | const CHART_ACTION = 'jetpack_stats_admin_bar_chart'; |
| 34 | |
| 35 | /** |
| 36 | * The handle of the 7-day chart script and style. |
| 37 | * |
| 38 | * @var string |
| 39 | */ |
| 40 | const SCRIPT_HANDLE = 'jetpack-stats-admin-bar'; |
| 41 | |
| 42 | /** |
| 43 | * The feature flag that swaps the 48-hour image for the 7-day chart. |
| 44 | * |
| 45 | * @var string |
| 46 | */ |
| 47 | const SEVEN_DAY_CHART_FLAG = 'jetpack-stats-admin-bar-seven-day-chart'; |
| 48 | |
| 49 | /** |
| 50 | * How many days the chart shows, ending today. |
| 51 | * |
| 52 | * @var int |
| 53 | */ |
| 54 | const SEVEN_DAY_CHART_DAYS = 7; |
| 55 | |
| 56 | /** |
| 57 | * Register the hooks. |
| 58 | * |
| 59 | * @return void |
| 60 | */ |
| 61 | public static function init() { |
| 62 | Feature_Flags::register( |
| 63 | self::SEVEN_DAY_CHART_FLAG, |
| 64 | array( |
| 65 | 'default' => false, |
| 66 | 'description' => 'Show a 7-day views chart in the admin bar, with views and visitors on hover, instead of the 48-hour image.', |
| 67 | 'owner' => 'jetpack-stats', |
| 68 | ) |
| 69 | ); |
| 70 | |
| 71 | add_action( 'admin_bar_menu', array( __CLASS__, 'maybe_add_chart_node' ), 100 ); |
| 72 | add_action( 'admin_bar_init', array( __CLASS__, 'maybe_add_chart' ) ); |
| 73 | add_action( 'wp_before_admin_bar_render', array( __CLASS__, 'add_site_menu_link' ) ); |
| 74 | add_action( 'admin_init', array( __CLASS__, 'maybe_serve_chart' ), 1 ); |
| 75 | add_action( 'admin_post_' . self::CHART_ACTION, array( __CLASS__, 'serve_chart' ) ); |
| 76 | add_filter( 'pre_option_db_version', array( __CLASS__, 'ignore_db_version' ) ); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Whether the current user should see the views chart. |
| 81 | * |
| 82 | * @return bool |
| 83 | */ |
| 84 | private static function can_see_chart() { |
| 85 | return is_user_logged_in() && Stats_Options::get_option( 'admin_bar' ) && current_user_can( 'view_stats' ); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Whether the admin bar shows the 7-day chart instead of the 48-hour image. |
| 90 | * |
| 91 | * @return bool |
| 92 | */ |
| 93 | private static function use_seven_day_chart() { |
| 94 | return Feature_Flags::is_enabled( self::SEVEN_DAY_CHART_FLAG ); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Add the views chart when the current user should see it. |
| 99 | * |
| 100 | * Hooked to admin_bar_menu because a REST request fires no page head, and the admin-bar endpoint needs this node. |
| 101 | * |
| 102 | * @param \WP_Admin_Bar $wp_admin_bar The admin bar. |
| 103 | * @return void |
| 104 | */ |
| 105 | public static function maybe_add_chart_node( $wp_admin_bar ) { |
| 106 | if ( self::can_see_chart() ) { |
| 107 | self::add_chart_node( $wp_admin_bar ); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Add the views chart styles to the admin bar stylesheet when the current user should see the chart. |
| 113 | * |
| 114 | * @return void |
| 115 | */ |
| 116 | public static function maybe_add_chart() { |
| 117 | if ( ! self::can_see_chart() ) { |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | if ( self::use_seven_day_chart() ) { |
| 122 | self::enqueue_seven_day_chart(); |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | wp_add_inline_style( |
| 127 | 'admin-bar', |
| 128 | '#wpadminbar .quicklinks li#wp-admin-bar-stats { height: 32px; } |
| 129 | #wpadminbar .quicklinks li#wp-admin-bar-stats a { height: 32px; padding: 0; } |
| 130 | #wpadminbar .quicklinks li#wp-admin-bar-stats a div { height: 32px; width: 95px; overflow: hidden; margin: 0 10px; } |
| 131 | #wpadminbar .quicklinks li#wp-admin-bar-stats a:hover div { width: auto; margin: 0 8px 0 10px; } |
| 132 | #wpadminbar .quicklinks li#wp-admin-bar-stats a img { height: 24px; margin: 4px 0; max-width: none; border: none; }' |
| 133 | ); |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Add the views chart, linked to the Stats dashboard. |
| 138 | * |
| 139 | * @param \WP_Admin_Bar $wp_admin_bar The admin bar. |
| 140 | * @return void |
| 141 | */ |
| 142 | public static function add_chart_node( $wp_admin_bar ) { |
| 143 | if ( self::use_seven_day_chart() ) { |
| 144 | $wp_admin_bar->add_menu( |
| 145 | array( |
| 146 | 'id' => 'stats', |
| 147 | 'href' => self::get_dashboard_url(), |
| 148 | 'title' => '<span id="jetpack-stats-admin-bar-chart" class="jp-stats-admin-bar-chart" aria-hidden="true"></span><span class="jp-stats-admin-bar-label">' . esc_html__( 'Stats', 'jetpack-stats-admin' ) . '</span>', |
| 149 | 'meta' => array( |
| 150 | 'menu_title' => __( 'Stats', 'jetpack-stats-admin' ), |
| 151 | 'class' => 'menupop', |
| 152 | 'html' => self::get_seven_day_panel_html(), |
| 153 | ), |
| 154 | ) |
| 155 | ); |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | $img_src = esc_attr( self::get_chart_src( 'admin-bar-hours-scale' ) ); |
| 160 | $img_src_2x = esc_attr( self::get_chart_src( 'admin-bar-hours-scale-2x' ) ); |
| 161 | $alt = esc_attr__( 'Stats', 'jetpack-stats-admin' ); |
| 162 | $title = esc_attr__( 'Views over 48 hours. Click for more Jetpack Stats.', 'jetpack-stats-admin' ); |
| 163 | |
| 164 | $wp_admin_bar->add_menu( |
| 165 | array( |
| 166 | 'id' => 'stats', |
| 167 | 'href' => self::get_dashboard_url(), |
| 168 | 'title' => "<div><img fetchpriority='low' loading='lazy' decoding='async' src='$img_src' srcset='$img_src 1x, $img_src_2x 2x' width='112' height='24' alt='$alt' title='$title'></div>", |
| 169 | // A client that reads the admin bar as data, like the omnibar, shows this instead of the image markup. |
| 170 | 'meta' => array( 'menu_title' => __( 'Stats', 'jetpack-stats-admin' ) ), |
| 171 | ) |
| 172 | ); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * The hover panel of the 7-day chart. The script fills in the bars and totals once stats load. |
| 177 | * |
| 178 | * @return string |
| 179 | */ |
| 180 | private static function get_seven_day_panel_html() { |
| 181 | $metric = static function ( $key, $label ) { |
| 182 | return sprintf( '<div class="jp-stats-admin-bar-panel__metric"><dt>%s</dt><dd data-metric="%s">–</dd></div>', esc_html( $label ), esc_attr( $key ) ); |
| 183 | }; |
| 184 | |
| 185 | return '<div class="ab-sub-wrapper"><div id="jetpack-stats-admin-bar-panel" class="jp-stats-admin-bar-panel">' |
| 186 | . '<div class="jp-stats-admin-bar-panel__title">' . esc_html( |
| 187 | sprintf( |
| 188 | /* translators: %d: Number of days. */ |
| 189 | _n( 'Last %d day', 'Last %d days', self::SEVEN_DAY_CHART_DAYS, 'jetpack-stats-admin' ), |
| 190 | self::SEVEN_DAY_CHART_DAYS |
| 191 | ) |
| 192 | ) . '</div>' |
| 193 | . '<span class="ab-label jp-stats-admin-bar-panel__bars" aria-hidden="true"></span>' |
| 194 | . '<dl class="jp-stats-admin-bar-panel__metrics">' |
| 195 | . $metric( 'views', __( 'Views', 'jetpack-stats-admin' ) ) |
| 196 | . $metric( 'visitors', __( 'Visitors', 'jetpack-stats-admin' ) ) |
| 197 | . '</dl>' |
| 198 | . '<p class="jp-stats-admin-bar-panel__error" hidden>' . esc_html__( 'Stats are unavailable right now.', 'jetpack-stats-admin' ) . '</p>' |
| 199 | . '</div>' |
| 200 | . '<ul class="ab-submenu jp-stats-admin-bar-panel__footer"><li><a class="ab-item" href="' . esc_url( self::get_seven_day_traffic_url() ) . '">' . esc_html__( 'View all stats', 'jetpack-stats-admin' ) . '</a></li></ul>' |
| 201 | . '</div>'; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * The Traffic page for the days the chart shows, ending today in the site's timezone. |
| 206 | * |
| 207 | * @return string |
| 208 | */ |
| 209 | private static function get_seven_day_traffic_url() { |
| 210 | $today = new \DateTimeImmutable( 'now', wp_timezone() ); |
| 211 | $start = $today->modify( '-' . ( self::SEVEN_DAY_CHART_DAYS - 1 ) . ' days' )->format( 'Y-m-d' ); |
| 212 | $end = $today->format( 'Y-m-d' ); |
| 213 | $url = admin_url( 'admin.php?page=stats#!/stats/day/' . (int) \Jetpack_Options::get_option( 'id' ) . "?chartStart=$start&chartEnd=$end" ); |
| 214 | |
| 215 | /** This filter is documented in src/class-admin-bar.php */ |
| 216 | return apply_filters( |
| 217 | 'jetpack_stats_url', |
| 218 | $url, |
| 219 | array( |
| 220 | 'view' => 'dashboard', |
| 221 | 'section' => 'traffic', |
| 222 | 'range' => array( |
| 223 | 'from' => $start, |
| 224 | 'to' => $end, |
| 225 | ), |
| 226 | ) |
| 227 | ); |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Enqueue the script that draws the 7-day chart and fills the hover panel. |
| 232 | * |
| 233 | * @return void |
| 234 | */ |
| 235 | private static function enqueue_seven_day_chart() { |
| 236 | Assets::register_script( |
| 237 | self::SCRIPT_HANDLE, |
| 238 | '../build/admin-bar.js', |
| 239 | __FILE__, |
| 240 | array( |
| 241 | 'in_footer' => true, |
| 242 | 'css_path' => '../build/admin-bar.css', |
| 243 | 'enqueue' => true, |
| 244 | ) |
| 245 | ); |
| 246 | |
| 247 | $config = array( |
| 248 | 'restUrl' => add_query_arg( |
| 249 | array( |
| 250 | 'unit' => 'day', |
| 251 | 'quantity' => self::SEVEN_DAY_CHART_DAYS, |
| 252 | 'stat_fields' => 'views,visitors', |
| 253 | ), |
| 254 | rest_url( 'jetpack/v4/stats-app/sites/' . (int) \Jetpack_Options::get_option( 'id' ) . '/stats/visits' ) |
| 255 | ), |
| 256 | 'nonce' => wp_create_nonce( 'wp_rest' ), |
| 257 | 'days' => self::SEVEN_DAY_CHART_DAYS, |
| 258 | ); |
| 259 | |
| 260 | wp_add_inline_script( |
| 261 | self::SCRIPT_HANDLE, |
| 262 | 'window.jetpackStatsAdminBar = ' . wp_json_encode( $config, JSON_HEX_TAG | JSON_HEX_AMP ) . ';', |
| 263 | 'before' |
| 264 | ); |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * Add a Stats link to the site-name menu, next to Dashboard. |
| 269 | * |
| 270 | * @return void |
| 271 | */ |
| 272 | public static function add_site_menu_link() { |
| 273 | global $wp_admin_bar; |
| 274 | |
| 275 | // WordPress.com adds its own Stats link to this menu. |
| 276 | if ( |
| 277 | ! is_object( $wp_admin_bar ) || |
| 278 | ! $wp_admin_bar->get_node( 'dashboard' ) || |
| 279 | ! current_user_can( 'view_stats' ) || |
| 280 | ( new Host() )->is_wpcom_platform() |
| 281 | ) { |
| 282 | return; |
| 283 | } |
| 284 | |
| 285 | $wp_admin_bar->add_node( |
| 286 | array( |
| 287 | 'parent' => 'site-name', |
| 288 | 'id' => 'jetpack-stats', |
| 289 | 'title' => __( 'Stats', 'jetpack-stats-admin' ), |
| 290 | 'href' => self::get_dashboard_url(), |
| 291 | ) |
| 292 | ); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Where the admin bar's Stats links go. |
| 297 | * |
| 298 | * @return string |
| 299 | */ |
| 300 | private static function get_dashboard_url() { |
| 301 | /** |
| 302 | * Filters a link to a Stats page, so a newer analytics dashboard can claim it. |
| 303 | * |
| 304 | * `$args['view']` names the page the link opens: `dashboard`, or `post` with the post in `$args['id']`. |
| 305 | * A `dashboard` link may carry a `section` and a `range` of `from`/`to` days as `Y-m-d`. |
| 306 | * Return `$url` unchanged for a view the dashboard has no page for. |
| 307 | * |
| 308 | * @since 0.39.0 |
| 309 | * @since $$next-version$$ The `dashboard` view may carry a `section` and a `range`. |
| 310 | * |
| 311 | * @param string $url The Stats URL. |
| 312 | * @param array $args The page the link opens. |
| 313 | */ |
| 314 | return apply_filters( 'jetpack_stats_url', admin_url( 'admin.php?page=stats' ), array( 'view' => 'dashboard' ) ); |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Get the local URL that serves a chart image. |
| 319 | * |
| 320 | * Served by admin-post.php, because admin.php returns 403 for a page slug no plugin registers. |
| 321 | * |
| 322 | * @param string $chart One of the CHARTS. |
| 323 | * @return string |
| 324 | */ |
| 325 | public static function get_chart_src( $chart ) { |
| 326 | return add_query_arg( |
| 327 | array( |
| 328 | 'action' => self::CHART_ACTION, |
| 329 | 'chart' => $chart, |
| 330 | ), |
| 331 | admin_url( 'admin-post.php' ) |
| 332 | ); |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Serve the chart an admin-post.php request asks for, or end it with an error status. |
| 337 | * |
| 338 | * @since 0.39.1 |
| 339 | * |
| 340 | * @return void |
| 341 | */ |
| 342 | public static function serve_chart() { |
| 343 | $chart = self::get_chart_param(); |
| 344 | if ( null === $chart ) { |
| 345 | wp_die( '', '', 400 ); |
| 346 | return; |
| 347 | } |
| 348 | |
| 349 | if ( ! self::can_see_chart() ) { |
| 350 | wp_die( '', '', 403 ); |
| 351 | return; |
| 352 | } |
| 353 | |
| 354 | self::send_chart( $chart ); |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * Serve a chart and stop, when a legacy `admin.php?page=stats` request asks for one. |
| 359 | * |
| 360 | * @return void |
| 361 | */ |
| 362 | public static function maybe_serve_chart() { |
| 363 | // URLs with `proxy` come from the Jetpack plugin's deprecated stats_get_image_chart_src(), and its own handler forwards their extra parameters. |
| 364 | if ( isset( $_GET['proxy'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- An image request carries no nonce, and it changes nothing. |
| 365 | return; |
| 366 | } |
| 367 | |
| 368 | $chart = self::get_requested_chart(); |
| 369 | if ( null === $chart || ! self::can_see_chart() ) { |
| 370 | return; |
| 371 | } |
| 372 | |
| 373 | self::send_chart( $chart ); |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * Send a chart image fetched from WordPress.com, and stop. |
| 378 | * |
| 379 | * The browser cannot fetch the chart from WordPress.com directly, because only the blog token can read it. |
| 380 | * |
| 381 | * @param string $chart One of the CHARTS. |
| 382 | * @return never |
| 383 | */ |
| 384 | private static function send_chart( $chart ) { |
| 385 | $image = self::fetch_chart( $chart ); |
| 386 | if ( null === $image ) { |
| 387 | status_header( 502 ); |
| 388 | exit( 0 ); |
| 389 | } |
| 390 | |
| 391 | header( 'Content-Type: ' . $image['type'] ); |
| 392 | header( 'Content-Length: ' . strlen( $image['body'] ) ); |
| 393 | echo $image['body']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Binary image data. |
| 394 | exit( 0 ); |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Fetch a chart image from WordPress.com with the blog token. |
| 399 | * |
| 400 | * @param string $chart One of the CHARTS. |
| 401 | * @return array{type: string, body: string}|null The image, or null when WordPress.com did not return one. |
| 402 | */ |
| 403 | public static function fetch_chart( $chart ) { |
| 404 | $server = Constants::get_constant( 'STATS_DASHBOARD_SERVER' ) ?? 'dashboard.wordpress.com'; |
| 405 | |
| 406 | // WordPress.com accepts the blog token on this file only when `page`, `proxy` and `blog` are all present. |
| 407 | $url = add_query_arg( |
| 408 | array( |
| 409 | 'page' => 'stats', |
| 410 | 'proxy' => '', |
| 411 | 'blog' => Stats_Options::get_option( 'blog_id' ), |
| 412 | ), |
| 413 | "https://{$server}/wp-includes/charts/{$chart}.php" |
| 414 | ); |
| 415 | |
| 416 | $response = Client::remote_request( |
| 417 | array( |
| 418 | 'url' => $url, |
| 419 | 'method' => 'GET', |
| 420 | 'timeout' => 90, |
| 421 | 'user_id' => 0, |
| 422 | ) |
| 423 | ); |
| 424 | |
| 425 | // A failed request has the code '', which PHP 8 cannot divide. |
| 426 | $code = (int) wp_remote_retrieve_response_code( $response ); |
| 427 | $type = wp_remote_retrieve_header( $response, 'content-type' ); |
| 428 | $body = wp_remote_retrieve_body( $response ); |
| 429 | if ( 2 !== (int) ( $code / 100 ) || ! is_string( $type ) || ! str_starts_with( $type, 'image/' ) || '' === $body ) { |
| 430 | return null; |
| 431 | } |
| 432 | |
| 433 | return array( |
| 434 | 'type' => $type, |
| 435 | 'body' => $body, |
| 436 | ); |
| 437 | } |
| 438 | |
| 439 | /** |
| 440 | * Keep chart requests from redirecting to upgrade.php while a database upgrade is pending. |
| 441 | * |
| 442 | * @see wp-admin/admin.php, which compares the stored `db_version` with `$wp_db_version`. |
| 443 | * |
| 444 | * @param mixed $version The stored database version. |
| 445 | * @return mixed |
| 446 | */ |
| 447 | public static function ignore_db_version( $version ) { |
| 448 | if ( is_admin() && null !== self::get_requested_chart() ) { |
| 449 | global $wp_db_version; |
| 450 | return $wp_db_version; |
| 451 | } |
| 452 | |
| 453 | return $version; |
| 454 | } |
| 455 | |
| 456 | /** |
| 457 | * Get the chart a legacy `page=stats` request asks for. |
| 458 | * |
| 459 | * @return string|null One of the CHARTS, or null when the request is not a `page=stats` chart request. |
| 460 | */ |
| 461 | private static function get_requested_chart() { |
| 462 | if ( ! isset( $_GET['page'] ) || 'stats' !== $_GET['page'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- An image request carries no nonce, and it changes nothing. |
| 463 | return null; |
| 464 | } |
| 465 | |
| 466 | return self::get_chart_param(); |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * Get the chart in the request's `chart` parameter. |
| 471 | * |
| 472 | * @return string|null One of the CHARTS, or null when the parameter names none. |
| 473 | */ |
| 474 | private static function get_chart_param() { |
| 475 | // phpcs:disable WordPress.Security.NonceVerification.Recommended -- An image request carries no nonce, and it changes nothing. |
| 476 | if ( ! isset( $_GET['chart'] ) ) { |
| 477 | return null; |
| 478 | } |
| 479 | |
| 480 | $chart = sanitize_key( wp_unslash( $_GET['chart'] ) ); |
| 481 | // phpcs:enable WordPress.Security.NonceVerification.Recommended |
| 482 | |
| 483 | return in_array( $chart, self::CHARTS, true ) ? $chart : null; |
| 484 | } |
| 485 | } |