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| 1 | <?php |
| 2 | /** |
| 3 | * Real-time Collaboration (RTC) websocket transport support. |
| 4 | * |
| 5 | * Extends Gutenberg's RTC feature with PingHub websocket transport |
| 6 | * using the WordPress.com infrastructure. |
| 7 | * |
| 8 | * @package automattic/jetpack-rtc |
| 9 | */ |
| 10 | |
| 11 | namespace Automattic\Jetpack; |
| 12 | |
| 13 | use Automattic\Jetpack\RTC\REST_Connection_Log; |
| 14 | use Automattic\Jetpack\RTC\REST_Pinghub_Token; |
| 15 | use Automattic\Jetpack\RTC\REST_RTC_Notices; |
| 16 | |
| 17 | /** |
| 18 | * Main RTC class. |
| 19 | */ |
| 20 | class RTC { |
| 21 | |
| 22 | const PACKAGE_VERSION = '0.1.0'; |
| 23 | |
| 24 | /** |
| 25 | * Option names for the RTC setting. |
| 26 | * The old name was used until Gutenberg PR #76643 renamed it. |
| 27 | * Both are supported for backwards compatibility. |
| 28 | */ |
| 29 | const OPTION_OLD = 'wp_enable_real_time_collaboration'; |
| 30 | const OPTION_NEW = 'wp_collaboration_enabled'; |
| 31 | |
| 32 | /** |
| 33 | * Whether the hooks have been initialized. |
| 34 | * |
| 35 | * @var bool |
| 36 | */ |
| 37 | private static $initialized = false; |
| 38 | |
| 39 | /** |
| 40 | * Initialize the RTC package by registering hooks. |
| 41 | * |
| 42 | * @return void |
| 43 | */ |
| 44 | public static function init() { |
| 45 | if ( self::$initialized ) { |
| 46 | return; |
| 47 | } |
| 48 | self::$initialized = true; |
| 49 | |
| 50 | add_action( 'rest_api_init', array( __CLASS__, 'register_rest_routes' ) ); |
| 51 | add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'register_providers' ) ); |
| 52 | add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'load_notices' ) ); |
| 53 | add_action( 'load-options-writing.php', array( __CLASS__, 'unregister_rtc_setting' ) ); |
| 54 | add_action( 'load-options-writing.php', array( __CLASS__, 'override_rtc_setting_default' ) ); |
| 55 | |
| 56 | // Hook into both old and new option names for backwards compatibility. |
| 57 | foreach ( array( self::OPTION_OLD, self::OPTION_NEW ) as $option ) { |
| 58 | add_filter( 'option_' . $option, array( __CLASS__, 'filter_rtc_option' ), 10 ); |
| 59 | add_filter( 'default_option_' . $option, array( __CLASS__, 'default_rtc_option' ), 20, 2 ); |
| 60 | add_filter( 'pre_option_' . $option, array( __CLASS__, 'pre_rtc_option' ) ); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Determine whether RTC is allowed. |
| 66 | * |
| 67 | * @return bool |
| 68 | */ |
| 69 | public static function is_allowed() { |
| 70 | /** |
| 71 | * Filter whether RTC can be enabled. |
| 72 | * |
| 73 | * @param bool $is_enabled Whether RTC can be enabled. |
| 74 | */ |
| 75 | return apply_filters( 'jetpack_rtc_enabled', false ); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Determine whether RTC is enabled. |
| 80 | * |
| 81 | * @return bool |
| 82 | */ |
| 83 | public static function is_enabled() { |
| 84 | global $pagenow; |
| 85 | |
| 86 | // Real-time collaboration is not enabled in the site editor. |
| 87 | if ( |
| 88 | 'site-editor.php' === $pagenow || |
| 89 | ( 'admin.php' === $pagenow && isset( $_GET['page'] ) && 'site-editor-v2' === sanitize_text_field( wp_unslash( $_GET['page'] ) ) ) // phpcs:ignore WordPress.Security.NonceVerification.Recommended |
| 90 | ) { |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | return self::is_allowed() && (bool) get_option( 'wp_collaboration_enabled' ); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Get the list of active RTC providers. |
| 99 | * |
| 100 | * @return string[] |
| 101 | */ |
| 102 | public static function get_providers() { |
| 103 | if ( ! self::is_enabled() ) { |
| 104 | return array(); |
| 105 | } |
| 106 | |
| 107 | $allowed_providers = array( 'http-polling', 'pinghub' ); |
| 108 | |
| 109 | $default_providers = array( 'pinghub' ); |
| 110 | |
| 111 | /** |
| 112 | * Filter the list of RTC providers. |
| 113 | * |
| 114 | * @param string[] $providers List of provider identifiers. |
| 115 | */ |
| 116 | $providers = apply_filters( 'jetpack_rtc_providers', $default_providers ); |
| 117 | if ( ! is_array( $providers ) ) { |
| 118 | return array(); |
| 119 | } |
| 120 | |
| 121 | return array_values( |
| 122 | array_filter( |
| 123 | $providers, |
| 124 | function ( $provider ) use ( $allowed_providers ) { |
| 125 | return in_array( $provider, $allowed_providers, true ); |
| 126 | } |
| 127 | ) |
| 128 | ); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Register REST API routes for the PingHub token endpoint. |
| 133 | * |
| 134 | * @return void |
| 135 | */ |
| 136 | public static function register_rest_routes() { |
| 137 | ( new REST_Pinghub_Token() )->register_routes(); |
| 138 | ( new REST_RTC_Notices() )->register_routes(); |
| 139 | |
| 140 | if ( function_exists( 'log2logstash' ) ) { |
| 141 | ( new REST_Connection_Log() )->register_routes(); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Enqueue the assets that extend the RTC providers. |
| 147 | * |
| 148 | * @return void |
| 149 | */ |
| 150 | public static function register_providers() { |
| 151 | if ( ! self::is_enabled() ) { |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | $providers = self::get_providers(); |
| 156 | |
| 157 | // If HTTP polling (Gutenberg's built-in default provider when this script isn't enqueued) |
| 158 | // is the only provider being used, then we don't need to inject any assets since that's |
| 159 | // already the default behavior. |
| 160 | if ( count( $providers ) === 1 && in_array( 'http-polling', $providers, true ) ) { |
| 161 | return; |
| 162 | } |
| 163 | |
| 164 | $handle = 'jetpack-rtc-providers'; |
| 165 | |
| 166 | Assets::register_script( |
| 167 | $handle, |
| 168 | '../build/rtc-providers.js', |
| 169 | __FILE__, |
| 170 | array( |
| 171 | 'in_footer' => true, |
| 172 | 'textdomain' => 'jetpack-rtc', |
| 173 | 'enqueue' => true, |
| 174 | ) |
| 175 | ); |
| 176 | |
| 177 | $data = wp_json_encode( |
| 178 | array( |
| 179 | 'providers' => $providers, |
| 180 | 'connectionLogging' => function_exists( 'log2logstash' ), |
| 181 | 'currentPostType' => get_post_type() ? get_post_type() : null, |
| 182 | 'currentPostId' => get_the_ID() ? get_the_ID() : null, |
| 183 | ), |
| 184 | JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP |
| 185 | ); |
| 186 | |
| 187 | wp_add_inline_script( |
| 188 | $handle, |
| 189 | "var jetpackRTC = $data;", |
| 190 | 'before' |
| 191 | ); |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Unregister the RTC setting field on the Writing page if RTC is not allowed. |
| 196 | * |
| 197 | * @return void |
| 198 | */ |
| 199 | public static function unregister_rtc_setting() { |
| 200 | if ( self::is_allowed() ) { |
| 201 | return; |
| 202 | } |
| 203 | |
| 204 | global $wp_settings_fields; |
| 205 | |
| 206 | foreach ( array( self::OPTION_OLD, self::OPTION_NEW ) as $option ) { |
| 207 | if ( isset( $wp_settings_fields['writing']['default'][ $option ] ) ) { |
| 208 | unset( $wp_settings_fields['writing']['default'][ $option ] ); |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * When RTC is not allowed, always force the option off. |
| 215 | * When RTC is allowed, respect the stored option value. |
| 216 | * |
| 217 | * @param mixed $value The value of the option. |
| 218 | * @return mixed |
| 219 | */ |
| 220 | public static function filter_rtc_option( $value ) { |
| 221 | // RTC not allowed: force the option off, regardless of what's in the DB. |
| 222 | if ( ! self::is_allowed() ) { |
| 223 | return '0'; |
| 224 | } |
| 225 | |
| 226 | // RTC allowed: respect whatever is stored. |
| 227 | return $value; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * When RTC is allowed and the option is NOT stored yet, |
| 232 | * default the option to enabled (1), unless the old option |
| 233 | * has a stored value to migrate from. |
| 234 | * |
| 235 | * This handles the Gutenberg upgrade path: e.g. a site on 22.7 stored |
| 236 | * wp_enable_real_time_collaboration, then upgraded to 22.8 which reads |
| 237 | * wp_collaboration_enabled — the new option inherits the old value. |
| 238 | * |
| 239 | * @param mixed $default The default value. |
| 240 | * @param string $option The option name. |
| 241 | * @return mixed |
| 242 | */ |
| 243 | public static function default_rtc_option( $default = '', $option = '' ) { |
| 244 | // RTC not allowed: keep default disabled. |
| 245 | if ( ! self::is_allowed() ) { |
| 246 | return '0'; |
| 247 | } |
| 248 | // RTC allowed and option is not stored yet |
| 249 | if ( $option === self::OPTION_NEW ) { |
| 250 | // If the old option is set, use that. |
| 251 | return get_option( self::OPTION_OLD ); |
| 252 | } |
| 253 | // Default to enabled. |
| 254 | return '1'; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Disable RTC for super admins that are not members of the blog to avoid |
| 259 | * accidentally exposing their presence to site users (e.g. during support). |
| 260 | * Skip this on the Writing settings page so they can still toggle the option. |
| 261 | * |
| 262 | * @return mixed |
| 263 | */ |
| 264 | public static function pre_rtc_option() { |
| 265 | global $pagenow; |
| 266 | |
| 267 | if ( 'options-writing.php' !== $pagenow && is_super_admin() && ! is_user_member_of_blog() ) { |
| 268 | return '0'; |
| 269 | } |
| 270 | |
| 271 | // Returning false to let `get_option` proceed normally. |
| 272 | return false; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Override the default for the Gutenberg RTC setting so it defaults to enabled in the UI. |
| 277 | * |
| 278 | * @return void |
| 279 | */ |
| 280 | public static function override_rtc_setting_default() { |
| 281 | global $wp_registered_settings; |
| 282 | |
| 283 | // No need to override the setting when RTC is not allowed, since we unregister it |
| 284 | // in `unregister_rtc_setting`. |
| 285 | if ( ! self::is_allowed() ) { |
| 286 | return; |
| 287 | } |
| 288 | |
| 289 | foreach ( array( self::OPTION_OLD, self::OPTION_NEW ) as $option ) { |
| 290 | // Only re-register the option if Gutenberg already registered it. |
| 291 | if ( ! isset( $wp_registered_settings[ $option ] ) ) { |
| 292 | continue; |
| 293 | } |
| 294 | |
| 295 | unregister_setting( 'writing', $option ); |
| 296 | |
| 297 | register_setting( |
| 298 | 'writing', |
| 299 | $option, |
| 300 | array( |
| 301 | 'type' => 'boolean', |
| 302 | 'description' => __( 'Enable Real-Time Collaboration', 'jetpack-rtc' ), |
| 303 | 'sanitize_callback' => 'rest_sanitize_boolean', |
| 304 | 'default' => true, |
| 305 | 'show_in_rest' => true, |
| 306 | ) |
| 307 | ); |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Get the maximum number of peers allowed per room. |
| 313 | * |
| 314 | * @return int Max peers per room. |
| 315 | */ |
| 316 | public static function get_max_peers_per_room() { |
| 317 | return (int) apply_filters( 'jetpack_rtc_max_peers_per_room', 3 ); |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Check if the current user is the plan owner for this site. |
| 322 | * Works on Simple sites (via wpcom_get_blog_owner) and Atomic sites |
| 323 | * (via Jetpack connection master_user). Returns false on self-hosted |
| 324 | * since there is no WP.com plan to upgrade. |
| 325 | * |
| 326 | * @return bool |
| 327 | */ |
| 328 | public static function is_plan_owner() { |
| 329 | $current_user_id = get_current_user_id(); |
| 330 | |
| 331 | // Simple sites: wpcom_get_blog_owner is the canonical source. |
| 332 | if ( function_exists( 'wpcom_get_blog_owner' ) ) { |
| 333 | $owner_id = wpcom_get_blog_owner( get_wpcom_blog_id() ); |
| 334 | return (int) $current_user_id === (int) $owner_id; |
| 335 | } |
| 336 | |
| 337 | // Atomic sites: the Jetpack connection master_user is the plan owner. |
| 338 | if ( class_exists( 'Jetpack_Options' ) ) { |
| 339 | $master_user = \Jetpack_Options::get_option( 'master_user' ); |
| 340 | if ( $master_user ) { |
| 341 | return (int) $current_user_id === (int) $master_user; |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | return false; |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Get the site slug for use in WP.com URLs. |
| 350 | * |
| 351 | * @return string |
| 352 | */ |
| 353 | private static function get_site_slug() { |
| 354 | if ( function_exists( 'wpcom_get_site_slug' ) ) { |
| 355 | return wpcom_get_site_slug(); |
| 356 | } |
| 357 | |
| 358 | if ( class_exists( '\Automattic\Jetpack\Status' ) ) { |
| 359 | $jetpack_status = new \Automattic\Jetpack\Status(); |
| 360 | return $jetpack_status->get_site_suffix(); |
| 361 | } |
| 362 | |
| 363 | return ''; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * Enqueue the assets that handle the RTC notices. |
| 368 | * |
| 369 | * @return void |
| 370 | */ |
| 371 | public static function load_notices() { |
| 372 | if ( ! self::is_enabled() ) { |
| 373 | return; |
| 374 | } |
| 375 | |
| 376 | $handle = 'jetpack-rtc-notices'; |
| 377 | |
| 378 | Assets::register_script( |
| 379 | $handle, |
| 380 | '../build/rtc-notices.js', |
| 381 | __FILE__, |
| 382 | array( |
| 383 | 'in_footer' => true, |
| 384 | 'textdomain' => 'jetpack-rtc', |
| 385 | 'enqueue' => true, |
| 386 | ) |
| 387 | ); |
| 388 | |
| 389 | $is_admin_user = current_user_can( 'manage_options' ); |
| 390 | $is_plan_owner = self::is_plan_owner(); |
| 391 | $post_type = get_post_type(); |
| 392 | |
| 393 | $data = wp_json_encode( |
| 394 | array( |
| 395 | 'assetsUrl' => plugins_url( '../build/', __FILE__ ), |
| 396 | 'isAdmin' => $is_admin_user, |
| 397 | 'isPlanOwner' => $is_plan_owner, |
| 398 | 'postId' => get_the_ID(), |
| 399 | 'postType' => $post_type ? $post_type : null, |
| 400 | 'userId' => get_current_user_id(), |
| 401 | 'postTitle' => get_the_title(), |
| 402 | 'postEditUrl' => get_edit_post_link( get_the_ID(), 'raw' ), |
| 403 | 'postsListUrl' => admin_url( 'edit.php' ), |
| 404 | 'siteSlug' => self::get_site_slug(), |
| 405 | 'maxPeersPerRoom' => self::get_max_peers_per_room(), |
| 406 | 'enableLimitNotices' => apply_filters( 'jetpack_rtc_enable_limit_notices', false ), |
| 407 | ), |
| 408 | JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP |
| 409 | ); |
| 410 | |
| 411 | wp_add_inline_script( |
| 412 | $handle, |
| 413 | "var jetpackRtcNotices = $data;", |
| 414 | 'before' |
| 415 | ); |
| 416 | } |
| 417 | } |