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| 1 | <?php |
| 2 | /** |
| 3 | * The number of threats shown next to the Protect menu item and in the admin bar. |
| 4 | * |
| 5 | * @package automattic/jetpack-protect |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Protect; |
| 9 | |
| 10 | use Automattic\Jetpack\Assets; |
| 11 | use Automattic\Jetpack\Menu_Badges\Menu_Badges; |
| 12 | use Automattic\Jetpack\Menu_Badges\Notification_Counts; |
| 13 | use Automattic\Jetpack\Protect_Status\Status; |
| 14 | use WP_Error; |
| 15 | use WP_REST_Response; |
| 16 | |
| 17 | /** |
| 18 | * Shows the stored threat count while rendering, and refreshes it from the browser. |
| 19 | * |
| 20 | * Rendering never waits on WordPress.com: an expired or missing count is fetched by a script after the page loads. |
| 21 | */ |
| 22 | class Threat_Count { |
| 23 | |
| 24 | /** |
| 25 | * Handle of the script that refreshes the count. |
| 26 | * |
| 27 | * @var string |
| 28 | */ |
| 29 | const SCRIPT_HANDLE = 'jetpack-protect-threat-count'; |
| 30 | |
| 31 | /** |
| 32 | * Document event the script fires with the fresh count, for the admin bar notice. |
| 33 | * |
| 34 | * @var string |
| 35 | */ |
| 36 | const EVENT = 'jetpack-protect-threat-count'; |
| 37 | |
| 38 | /** |
| 39 | * REST route, under `jetpack/v4`, that returns a fresh count. |
| 40 | * |
| 41 | * @var string |
| 42 | */ |
| 43 | const REST_ROUTE = '/protect-dashboard/threat-count'; |
| 44 | |
| 45 | /** |
| 46 | * Transient set while the count is not refreshed after a failed status fetch. |
| 47 | * |
| 48 | * @var string |
| 49 | */ |
| 50 | const BACKOFF_TRANSIENT = 'jetpack_protect_dashboard_threat_count_backoff'; |
| 51 | |
| 52 | /** |
| 53 | * Wire the hooks. |
| 54 | * |
| 55 | * @return void |
| 56 | */ |
| 57 | public static function init() { |
| 58 | add_action( 'rest_api_init', array( __CLASS__, 'register_rest_route' ) ); |
| 59 | add_action( 'admin_enqueue_scripts', array( __CLASS__, 'maybe_enqueue_refresh' ) ); |
| 60 | add_action( 'wp_enqueue_scripts', array( __CLASS__, 'maybe_enqueue_refresh' ) ); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * The stored count, even if it has expired. |
| 65 | * |
| 66 | * @return int|null Null when no status has been stored yet. |
| 67 | */ |
| 68 | public static function get_cached() { |
| 69 | try { |
| 70 | $status = Status::get_cached_status(); |
| 71 | } catch ( \Throwable $e ) { |
| 72 | // This runs on every admin page, so a malformed stored status must not take them all down. |
| 73 | return null; |
| 74 | } |
| 75 | return null === $status ? null : count( $status->threats ); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Show the stored count next to the "Protect" item, for users who can open the page. |
| 80 | * |
| 81 | * A missing count registers a hidden badge, which the refresh script reveals. |
| 82 | * |
| 83 | * @return void |
| 84 | */ |
| 85 | public static function register_menu_badge() { |
| 86 | if ( ! Dashboard::can_manage() ) { |
| 87 | return; |
| 88 | } |
| 89 | |
| 90 | Menu_Badges::init(); |
| 91 | // The same ID as the Jetpack Protect plugin's entry, so the threats are not counted twice. |
| 92 | Notification_Counts::register( |
| 93 | Dashboard::MENU_SLUG, |
| 94 | array( |
| 95 | 'menu_slug' => Dashboard::MENU_SLUG, |
| 96 | 'count' => (int) self::get_cached(), |
| 97 | 'type' => 'count', |
| 98 | ) |
| 99 | ); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Whether the stored count should be refreshed from the browser. |
| 104 | * |
| 105 | * @return bool |
| 106 | */ |
| 107 | public static function needs_refresh() { |
| 108 | return ! get_transient( self::BACKOFF_TRANSIENT ) && Status::is_cached_status_expired(); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Load the refresh script on pages showing the menu badge or the admin bar, when the count is stale. |
| 113 | * |
| 114 | * @return void |
| 115 | */ |
| 116 | public static function maybe_enqueue_refresh() { |
| 117 | if ( ( ! is_admin() && ! is_admin_bar_showing() ) || ! Dashboard::can_manage() || ! self::needs_refresh() ) { |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | $dependencies = array( 'wp-api-fetch' ); |
| 122 | if ( is_admin() ) { |
| 123 | // The menu badge script only loads in wp-admin; elsewhere only the admin bar is updated. |
| 124 | Menu_Badges::enqueue_client(); |
| 125 | $dependencies[] = 'jetpack-menu-badges'; |
| 126 | } |
| 127 | Assets::register_script( |
| 128 | self::SCRIPT_HANDLE, |
| 129 | 'js/threat-count.js', |
| 130 | __FILE__, |
| 131 | array( |
| 132 | 'dependencies' => $dependencies, |
| 133 | 'in_footer' => true, |
| 134 | 'enqueue' => true, |
| 135 | ) |
| 136 | ); |
| 137 | wp_localize_script( |
| 138 | self::SCRIPT_HANDLE, |
| 139 | 'jetpackProtectThreatCountConfig', |
| 140 | array( |
| 141 | 'path' => 'jetpack/v4' . self::REST_ROUTE, |
| 142 | 'menuSlug' => Dashboard::MENU_SLUG, |
| 143 | 'event' => self::EVENT, |
| 144 | ) |
| 145 | ); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Register the route the refresh script calls. |
| 150 | * |
| 151 | * @return void |
| 152 | */ |
| 153 | public static function register_rest_route() { |
| 154 | register_rest_route( |
| 155 | 'jetpack/v4', |
| 156 | self::REST_ROUTE, |
| 157 | array( |
| 158 | 'methods' => \WP_REST_Server::READABLE, |
| 159 | 'callback' => array( __CLASS__, 'get_fresh_count' ), |
| 160 | 'permission_callback' => array( Dashboard::class, 'can_manage' ), |
| 161 | ) |
| 162 | ); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * The count, fetching the status from WordPress.com when the stored one has expired. |
| 167 | * |
| 168 | * @return WP_REST_Response|WP_Error |
| 169 | */ |
| 170 | public static function get_fresh_count() { |
| 171 | try { |
| 172 | $status = Status::get_status(); |
| 173 | } catch ( \Throwable $e ) { |
| 174 | $status = (object) array( 'error' => true ); |
| 175 | } |
| 176 | if ( ! empty( $status->error ) ) { |
| 177 | // A failed fetch is not stored, so without this every page load would ask WordPress.com again. |
| 178 | set_transient( self::BACKOFF_TRANSIENT, 1, 5 * MINUTE_IN_SECONDS ); |
| 179 | return new WP_Error( |
| 180 | 'jetpack_protect_threat_count_unavailable', |
| 181 | __( 'The number of threats could not be fetched.', 'jetpack-protect-pkg' ), |
| 182 | array( 'status' => 503 ) |
| 183 | ); |
| 184 | } |
| 185 | |
| 186 | return rest_ensure_response( array( 'count' => count( $status->threats ) ) ); |
| 187 | } |
| 188 | } |