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3.33
1<?php
2/**
3 * Primary class file for the Jetpack Backup plugin.
4 *
5 * @package automattic/jetpack-backup-plugin
6 */
7
8// After changing this file, consider increasing the version number ("VXXX") in all the files using this namespace, in
9// order to ensure that the specific version of this file always get loaded. Otherwise, Jetpack autoloader might decide
10// to load an older/newer version of the class (if, for example, both the standalone and bundled versions of the plugin
11// are installed, or in some other cases).
12namespace Automattic\Jetpack\Backup\V0005;
13
14if ( ! defined( 'ABSPATH' ) ) {
15    exit( 0 );
16}
17
18use Automattic\Jetpack\Admin_UI\Admin_Menu;
19use Automattic\Jetpack\Assets;
20use Automattic\Jetpack\Backup\V0005\Initial_State as Backup_Initial_State;
21use Automattic\Jetpack\Config;
22use Automattic\Jetpack\Connection\Client;
23use Automattic\Jetpack\Connection\Initial_State as Connection_Initial_State;
24use Automattic\Jetpack\Connection\Manager as Connection_Manager;
25use Automattic\Jetpack\Connection\Rest_Authentication as Connection_Rest_Authentication;
26use Automattic\Jetpack\My_Jetpack\Wpcom_Products;
27use Automattic\Jetpack\Status;
28use Automattic\Jetpack\Terms_Of_Service;
29use Automattic\Jetpack\Tracking;
30use Jetpack_Options;
31use WP_Error;
32use WP_REST_Server;
33use function add_action;
34use function add_filter;
35use function did_action;
36use function do_action;
37use function esc_url_raw;
38use function get_option;
39use function is_wp_error;
40use function rest_ensure_response;
41use function update_option;
42use function wp_add_inline_script;
43use function wp_remote_get;
44use function wp_remote_retrieve_body;
45use function wp_remote_retrieve_response_code;
46
47/**
48 * Class Jetpack_Backup
49 */
50class Jetpack_Backup {
51
52    /**
53     * Slug.
54     *
55     * @var string
56     */
57    const JETPACK_BACKUP_SLUG = 'jetpack-backup';
58
59    /**
60     * Backup name.
61     *
62     * @var string
63     */
64    const JETPACK_BACKUP_NAME = 'Jetpack Backup';
65
66    /**
67     * Backup URL.
68     *
69     * @var string
70     */
71    const JETPACK_BACKUP_URI = 'https://jetpack.com/jetpack-backup';
72
73    /**
74     * Promoted product.
75     *
76     * @var string
77     */
78    const JETPACK_BACKUP_PROMOTED_PRODUCT = 'jetpack_backup_t1_yearly';
79
80    /**
81     * Transient key prefix for the cached promoted product.
82     *
83     * Suffixed with the locale: it is a query arg on the catalogue request, so
84     * one shared key would serve one reader's language to another.
85     *
86     * @var string
87     */
88    const PROMOTED_PRODUCT_TRANSIENT_PREFIX = 'jetpack_backup_promoted_product_';
89
90    /**
91     * How long a fetched promoted product stays cached.
92     *
93     * The catalogue turns over on a marketing schedule rather than a
94     * session's, so half a day bounds how stale a price can get.
95     *
96     * @var int
97     */
98    const PROMOTED_PRODUCT_CACHE_TTL = 12 * HOUR_IN_SECONDS;
99
100    /**
101     * Licenses product ID.
102     *
103     * @var string
104     */
105    const JETPACK_BACKUP_PRODUCT_IDS = array(
106        2014, // JETPACK_COMPLETE.
107        2015, // JETPACK_COMPLETE_MONTHLY.
108        2016, // JETPACK_SECURITY_TIER_1_YEARLY.
109        2017, // JETPACK_SECURITY_TIER_1_MONTHLY.
110        2019, // JETPACK_SECURITY_TIER_2_YEARLY.
111        2020, // JETPACK_SECURITY_TIER_2_MONTHLY.
112        2112, // JETPACK_BACKUP_TIER_1_YEARLY.
113        2113, // JETPACK_BACKUP_TIER_1_MONTHLY.
114        2114, // JETPACK_BACKUP_TIER_2_YEARLY.
115        2115, // JETPACK_BACKUP_TIER_2_MONTHLY.
116    );
117
118    /**
119     * Jetpack Backup DB version.
120     *
121     * @var string
122     */
123    const JETPACK_BACKUP_DB_VERSION = '2';
124
125    /**
126     * Filter name that gates the wp-build–based dashboard.
127     *
128     * When this filter returns true, "Jetpack > Backup" renders the new
129     * wp-build dashboard instead of the legacy React app.
130     */
131    const MODERNIZATION_FILTER = 'rsm_jetpack_ui_modernization_backup';
132
133    /**
134     * Rewind state read from WordPress.com, memoized for the request.
135     *
136     * A class property and not a function static so tests can clear it.
137     *
138     * @var object|null
139     */
140    private static $rewind_state = null;
141
142    /**
143     * Constructor.
144     */
145    public static function initialize() {
146        if ( did_action( 'jetpack_backup_initialized' ) ) {
147            return;
148        }
149
150        // Set up the REST authentication hooks.
151        Connection_Rest_Authentication::init();
152
153        add_action( 'rest_api_init', array( __CLASS__, 'register_rest_routes' ) );
154        add_action( 'rest_api_init', array( \Automattic\Jetpack\Backup\V0005\REST\Rest_Controller::class, 'register_routes' ) );
155
156        add_action( 'admin_menu', array( __CLASS__, 'maybe_load_wp_build' ), 1 );
157        add_action( 'admin_menu', array( __CLASS__, 'add_wp_admin_submenu' ), 1 ); // Akismet uses 4, so we need to use 1 to ensure both menus are added when only they exist.
158
159        // Init Jetpack packages.
160        add_action(
161            'plugins_loaded',
162            function () {
163                $config = new Config();
164                // Connection package.
165                $config->ensure(
166                    'connection',
167                    array(
168                        'slug'     => self::JETPACK_BACKUP_SLUG,
169                        'name'     => self::JETPACK_BACKUP_NAME,
170                        'url_info' => self::JETPACK_BACKUP_URI,
171                    )
172                );
173                // Sync package.
174                $config->ensure( 'sync' );
175
176                // Identity crisis package.
177                $config->ensure( 'identity_crisis' );
178            },
179            1
180        );
181
182        add_action( 'plugins_loaded', array( __CLASS__, 'maybe_upgrade_db' ), 20 );
183
184        add_filter( 'jetpack_connection_user_has_license', array( __CLASS__, 'jetpack_check_user_licenses' ), 10, 3 );
185
186        // Jetpack Backup abilities are registered from `actions.php` at package
187        // autoload time so the surface is available in every consumer that
188        // loads this package (both the standalone Backup plugin and the
189        // Jetpack plugin), not only when `Jetpack_Backup::initialize()` runs.
190
191        /**
192         * Runs right after the Jetpack Backup package is initialized.
193         *
194         * @since 1.3.0
195         */
196        do_action( 'jetpack_backup_initialized' );
197    }
198
199    /**
200     * The page to be added to submenu
201     */
202    public static function add_wp_admin_submenu() {
203        $wp_build_active = self::is_wp_build_dashboard_active();
204        $callback        = $wp_build_active
205            ? 'jetpack_backup_jetpack_backup_dashboard_wp_admin_render_page'
206            : array( __CLASS__, 'plugin_settings_page' );
207
208        // The relabel rides the modernized dashboard rather than the filter alone,
209        // so a fallback to the legacy page also falls back to the legacy title.
210        $page_title = $wp_build_active ? 'Jetpack VaultPress Backup' : 'Jetpack Backup';
211        $menu_title = $wp_build_active ? 'VaultPress Backup' : 'Backup'; // Product name, do not translate.
212
213        $page_suffix = Admin_Menu::add_menu(
214            $page_title,
215            $menu_title,
216            'manage_options',
217            self::JETPACK_BACKUP_SLUG,
218            $callback
219        );
220
221        if ( $page_suffix ) {
222            add_action( 'load-' . $page_suffix, array( __CLASS__, 'admin_init' ) );
223        }
224    }
225
226    /**
227     * Initialize the admin resources.
228     */
229    public static function admin_init() {
230        add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue_admin_scripts' ) );
231
232        if ( self::is_wp_build_dashboard_active() ) {
233            // The modernized Backup overview is a focused, full-screen product
234            // surface. Suppress JITMs and other core/plugin admin notices so they
235            // don't reflow on top of the dual-pane layout. Mirrors how Jetpack
236            // Forms handles its dashboard page
237            // (`plugins/forms/src/dashboard/class-dashboard.php`).
238            remove_all_actions( 'admin_notices' );
239            remove_all_actions( 'all_admin_notices' );
240        }
241    }
242
243    /**
244     * Checks current version against version in code and run upgrades if we are running a new version
245     */
246    public static function maybe_upgrade_db() {
247        $current_db_version = get_option( 'jetpack_backup_db_version' );
248        if ( version_compare( $current_db_version, self::JETPACK_BACKUP_DB_VERSION, '<' ) ) {
249            update_option( 'jetpack_backup_db_version', self::JETPACK_BACKUP_DB_VERSION );
250            Jetpack_Backup_Upgrades::upgrade();
251        }
252    }
253
254    /**
255     * Returns whether we are in condition to track to use
256     * Analytics functionality like Tracks, MC, or GA.
257     */
258    public static function can_use_analytics() {
259        $status     = new Status();
260        $connection = new Connection_Manager( 'jetpack-backup' );
261        $tracking   = new Tracking( 'jetpack', $connection );
262
263        return $tracking->should_enable_tracking( new Terms_Of_Service(), $status );
264    }
265
266    /**
267     * Enqueue plugin admin scripts and styles.
268     */
269    public static function enqueue_admin_scripts() {
270        // This callback is registered via `load-{$page_suffix}` in `add_wp_admin_submenu()`,
271        // so it only fires on the Backup admin page — no need to re-check the page here.
272        if ( self::is_wp_build_dashboard_active() ) {
273            // The i18n loader is registered on every admin page by jetpack-assets but
274            // only enqueued when depended on; the esbuild bundles don't pull it in.
275            // Enqueue it here, before the early return, so the wp-build dashboard's
276            // init module can download its JS translation catalogs.
277            if ( wp_script_is( 'wp-jp-i18n-loader', 'registered' ) ) {
278                wp_enqueue_script( 'wp-jp-i18n-loader' );
279            }
280
281            // The esbuild bundles don't declare the Tracks client as a dependency
282            // either, so it never reaches the page on its own.
283            if ( self::can_use_analytics() ) {
284                Tracking::register_tracks_functions_scripts( true );
285            }
286
287            // wp-build manages its own enqueue pipeline. The legacy script and
288            // its initial state are skipped for the wp-build dashboard.
289            return;
290        }
291
292        Assets::register_script(
293            'jetpack-backup',
294            '../build/index.js',
295            __FILE__,
296            array(
297                'in_footer'  => true,
298                'textdomain' => 'jetpack-backup-pkg',
299            )
300        );
301        Assets::enqueue_script( 'jetpack-backup' );
302        // Initial JS state including JP Connection data.
303        wp_add_inline_script( 'jetpack-backup', self::get_initial_state(), 'before' );
304        Connection_Initial_State::render_script( 'jetpack-backup' );
305
306        // Load script for analytics.
307        if ( self::can_use_analytics() ) {
308            Tracking::register_tracks_functions_scripts( true );
309        }
310    }
311
312    /**
313     * Main plugin settings page.
314     */
315    public static function plugin_settings_page() {
316        ?>
317            <div id="jetpack-backup-root"></div>
318        <?php
319    }
320
321    /**
322     * Return the rendered initial state JavaScript code.
323     *
324     * @return string
325     */
326    private static function get_initial_state() {
327        return ( new Backup_Initial_State() )->render();
328    }
329
330    /**
331     * Register REST API
332     */
333    public static function register_rest_routes() {
334
335        // Get information on most recent 10 backups.
336        register_rest_route(
337            'jetpack/v4',
338            '/backups',
339            array(
340                'methods'             => WP_REST_Server::READABLE,
341                'callback'            => __CLASS__ . '::get_recent_backups',
342                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
343            )
344        );
345
346        // Get site backup/scan/anti-spam capabilities.
347        register_rest_route(
348            'jetpack/v4',
349            '/backup-capabilities',
350            array(
351                'methods'             => WP_REST_Server::READABLE,
352                'callback'            => __CLASS__ . '::get_backup_capabilities',
353                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
354            )
355        );
356
357        // Get whether the site has a backup plan
358        register_rest_route(
359            'jetpack/v4',
360            '/has-backup-plan',
361            array(
362                'methods'             => WP_REST_Server::READABLE,
363                'callback'            => __CLASS__ . '::get_backup_plan_state',
364                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
365            )
366        );
367
368        // Get site rewind data.
369        register_rest_route(
370            'jetpack/v4',
371            '/restores',
372            array(
373                'methods'             => WP_REST_Server::READABLE,
374                'callback'            => __CLASS__ . '::get_recent_restores',
375                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
376            )
377        );
378
379        // Get information on site products.
380        // Backup plugin version of /site/purchases from JP plugin.
381        // Revert once this route and MyPlan component are extracted to a common package.
382        register_rest_route(
383            'jetpack/v4',
384            '/site/current-purchases',
385            array(
386                'methods'             => WP_REST_Server::READABLE,
387                'callback'            => __CLASS__ . '::get_site_current_purchases',
388                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
389            )
390        );
391
392        // Get currently promoted product from the product's endpoint.
393            register_rest_route(
394                'jetpack/v4',
395                '/backup-promoted-product-info',
396                array(
397                    'methods'             => WP_REST_Server::READABLE,
398                    'callback'            => __CLASS__ . '::get_backup_promoted_product_info',
399                    'permission_callback' => __CLASS__ . '::backups_permissions_callback',
400                )
401            );
402
403        // Get and set value of dismissed_backup_review_request option
404        register_rest_route(
405            'jetpack/v4',
406            '/site/dismissed-review-request',
407            array(
408                'methods'             => WP_REST_Server::EDITABLE,
409                'callback'            => __CLASS__ . '::manage_dismissed_backup_review_request',
410                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
411                'args'                => array(
412                    'option_name'    => array(
413                        'required' => true,
414                        'type'     => 'string',
415                        // The two names `Jetpack_Options` recognises. Anything else
416                        // falls through its allowlist to a `trigger_error()` and is
417                        // stored nowhere, so an unlisted reason would dismiss
418                        // nothing while answering as though it had — and on a site
419                        // with `display_errors` on, the warning is printed ahead of
420                        // the JSON and the response no longer parses.
421                        'enum'     => array( 'restore', 'backups' ),
422                    ),
423                    'should_dismiss' => array(
424                        'required' => true,
425                        'type'     => 'boolean',
426                    ),
427                ),
428            )
429        );
430
431        // Get site size
432        register_rest_route(
433            'jetpack/v4',
434            '/site/backup/size',
435            array(
436                'methods'             => WP_REST_Server::READABLE,
437                'callback'            => __CLASS__ . '::get_site_backup_size',
438                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
439            )
440        );
441
442        // Get backup schedule time
443        register_rest_route(
444            'jetpack/v4',
445            '/site/backup/schedule',
446            array(
447                'methods'             => WP_REST_Server::READABLE,
448                'callback'            => __CLASS__ . '::get_site_backup_schedule_time',
449                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
450            )
451        );
452
453        // Get site policies
454        register_rest_route(
455            'jetpack/v4',
456            '/site/backup/policies',
457            array(
458                'methods'             => WP_REST_Server::READABLE,
459                'callback'            => __CLASS__ . '::get_site_backup_policies',
460                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
461            )
462        );
463
464        // Get site add-on offer
465        register_rest_route(
466            'jetpack/v4',
467            '/site/backup/addon-offer',
468            array(
469                'methods'             => WP_REST_Server::READABLE,
470                'callback'            => __CLASS__ . '::get_site_backup_addon_offer',
471                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
472                'args'                => array(
473                    'storage_size'  => array(
474                        'required' => true,
475                        'type'     => 'numeric',
476                    ),
477                    'storage_limit' => array(
478                        'required' => true,
479                        'type'     => 'numeric',
480                    ),
481                ),
482            )
483        );
484
485        // Enqueue a new backup
486        register_rest_route(
487            'jetpack/v4',
488            '/site/backup/enqueue',
489            array(
490                'methods'             => WP_REST_Server::CREATABLE,
491                'callback'            => __CLASS__ . '::enqueue_backup',
492                'permission_callback' => __CLASS__ . '::backups_permissions_callback',
493            )
494        );
495    }
496
497    /**
498     * The backup calls should only occur from a signed in admin user
499     *
500     * @access public
501     * @static
502     *
503     * @return true|WP_Error
504     */
505    public static function backups_permissions_callback() {
506        return current_user_can( 'manage_options' );
507    }
508
509    /**
510     * The error a route answers with when its WordPress.com request did not come
511     * back with a 200.
512     *
513     * Returning `null` instead — which these routes used to do — is served as an
514     * HTTP 200 carrying a `null` body, so `apiFetch` resolves and nothing throws.
515     * A WordPress.com blip then reaches the dashboard as an empty success, which
516     * is how a paying customer ends up looking at the first-run screen. A
517     * WP_Error makes the REST layer answer with a status, so every caller's
518     * existing failure path runs.
519     *
520     * @param int $status The upstream response code, already cast to an int, or 0
521     *                    when the request never reached WordPress.com.
522     * @return WP_Error
523     */
524    private static function get_failed_fetch_error( $status = 0 ) {
525        return new WP_Error(
526            'failed_to_fetch_data',
527            esc_html__( 'Unable to fetch the requested data.', 'jetpack-backup-pkg' ),
528            array(
529                // A transport failure has no status at all, and `status_header( 0 )`
530                // emits an invalid status line — so anything falsy becomes a 500.
531                'status' => $status ? $status : 500,
532            )
533        );
534    }
535
536    /**
537     * Get information about recent backups
538     *
539     * @access public
540     * @static
541     *
542     * @return \WP_REST_Response|WP_Error The recent backups, or a WP_Error if WordPress.com could not be reached.
543     */
544    public static function get_recent_backups() {
545        $blog_id = Jetpack_Options::get_option( 'id' );
546
547        $response = Client::wpcom_json_api_request_as_blog(
548            '/sites/' . $blog_id . '/rewind/backups',
549            'v2',
550            array(),
551            null,
552            'wpcom'
553        );
554
555        $response_code = (int) wp_remote_retrieve_response_code( $response );
556
557        if ( 200 !== $response_code ) {
558            return self::get_failed_fetch_error( $response_code );
559        }
560
561        return rest_ensure_response(
562            json_decode( $response['body'], true )
563        );
564    }
565
566    /**
567     * Hits the wpcom api to check rewind status.
568     *
569     * Bounded well clear of a healthy round trip; `Client`'s 10s default is too
570     * long for the synchronous `authorize_redirect` this sits on.
571     *
572     * @return object|WP_Error The decoded rewind state, or a WP_Error if WordPress.com could not be read.
573     */
574    private static function get_rewind_state_from_wpcom() {
575        if ( self::$rewind_state !== null ) {
576            return self::$rewind_state;
577        }
578
579        $site_id = Jetpack_Options::get_option( 'id' );
580
581        $response = Client::wpcom_json_api_request_as_blog( sprintf( '/sites/%d/rewind', $site_id ) . '?force=wpcom', '2', array( 'timeout' => 5 ), null, 'wpcom' );
582
583        // Cast: `wp_remote_retrieve_response_code()` hands back whatever the
584        // transport put there, and a numeric-string `'200'` fails this strict
585        // comparison.
586        $response_code = (int) wp_remote_retrieve_response_code( $response );
587
588        if ( 200 !== $response_code ) {
589            return self::get_failed_fetch_error( $response_code );
590        }
591
592        $state = json_decode( wp_remote_retrieve_body( $response ) );
593
594        // A 200 with no `state` is a read that failed, not a site without a
595        // plan. Caching it would hold that answer for the rest of the request;
596        // refusing lets a later caller ask again and get a real one.
597        if ( ! is_object( $state ) || ! isset( $state->state ) ) {
598            return new WP_Error(
599                'rewind_state_unreadable',
600                esc_html__( 'Unable to read the backup plan details for this site.', 'jetpack-backup-pkg' ),
601                array( 'status' => 500 )
602            );
603        }
604
605        self::$rewind_state = $state;
606        return self::$rewind_state;
607    }
608
609    /**
610     * Checks whether the site supports the product, reporting an unreadable answer as an error.
611     *
612     * @since 5.0.1
613     *
614     * @return bool|WP_Error True when the site has Backup, or a WP_Error if WordPress.com could not be read.
615     */
616    public static function get_backup_plan_state() {
617        $rewind_data = static::get_rewind_state_from_wpcom();
618
619        if ( is_wp_error( $rewind_data ) ) {
620            return $rewind_data;
621        }
622
623        return 'unavailable' !== $rewind_data->state;
624    }
625
626    /**
627     * Checks whether the current plan (or purchases) of the site already supports the product
628     *
629     * Answers a plan it could not read as absent, which is the one place that
630     * decision is made for every `bool` caller.
631     *
632     * @return bool
633     */
634    public static function has_backup_plan() {
635        $state = static::get_backup_plan_state();
636
637        return ! is_wp_error( $state ) && $state;
638    }
639
640    /**
641     * Get an array of backup/scan/anti-spam site capabilities
642     *
643     * @access public
644     * @static
645     *
646     * @return \WP_REST_Response|WP_Error The site capabilities, or a WP_Error if WordPress.com could not be reached.
647     */
648    public static function get_backup_capabilities() {
649        $blog_id = Jetpack_Options::get_option( 'id' );
650
651        $response = Client::wpcom_json_api_request_as_user(
652            '/sites/' . $blog_id . '/rewind/capabilities',
653            'v2',
654            array(),
655            null,
656            'wpcom'
657        );
658
659        $response_code = (int) wp_remote_retrieve_response_code( $response );
660
661        if ( 200 !== $response_code ) {
662            return self::get_failed_fetch_error( $response_code );
663        }
664
665        return rest_ensure_response(
666            json_decode( $response['body'], true )
667        );
668    }
669
670    /**
671     * Get information about recent restores
672     *
673     * @access public
674     * @static
675     *
676     * @return \WP_REST_Response|WP_Error The recent restores, or a WP_Error if WordPress.com could not be reached.
677     */
678    public static function get_recent_restores() {
679        $blog_id  = Jetpack_Options::get_option( 'id' );
680        $response = Client::wpcom_json_api_request_as_blog(
681            '/sites/' . $blog_id . '/rewind/restores',
682            'v2',
683            array(),
684            null,
685            'wpcom'
686        );
687
688        $response_code = (int) wp_remote_retrieve_response_code( $response );
689
690        if ( 200 !== $response_code ) {
691            return self::get_failed_fetch_error( $response_code );
692        }
693
694        return rest_ensure_response(
695            json_decode( $response['body'], true )
696        );
697    }
698
699    /**
700     * Query backup-completion events from the wpcom activity-log via the
701     * general `/sites/<id>/activity` endpoint with the action filter pinned
702     * to backup-completion event names. This endpoint paginates real-ly
703     * (Elasticsearch `from` offset under the hood) — the `/activity/rewindable`
704     * sibling looks like a more natural fit but hardcodes `page: 1,
705     * totalPages: 1` and ignores the `page` parameter.
706     *
707     * Auth: signs as user. The endpoint gates on the requesting WP user
708     * being an administrator of the blog (see
709     * sites-activity.php::readable_permission_check); blog-level tokens
710     * return 401.
711     *
712     * Returned shape (success): a W3C ActivityStreams envelope:
713     *   {
714     *     "@context": ..., "type": "OrderedCollection", "totalItems": int,
715     *     "page": int, "totalPages": int, "itemsPerPage": int,
716     *     "orderedItems": [ <event>, ... ]
717     *   }
718     * Each event has at least `published`, `rewind_id`, `is_rewindable`,
719     * `name`, `status`, `summary`.
720     *
721     * @param array $args Query args passed through to wpcom. Supported keys:
722     *                    `after` (ISO 8601), `before` (ISO 8601), `on` (ISO 8601),
723     *                    `date_range`, `number` (max 1000), `page` (1-based),
724     *                    `sort_order` ('asc'|'desc'). Any `action` key is
725     *                    overridden with the curated backup-completion list.
726     * @return array|\WP_REST_Response|null
727     */
728    public static function list_backup_events( array $args = array() ) {
729        $blog_id = Jetpack_Options::get_option( 'id' );
730
731        // Curated set of activity actions that represent "a backup completed".
732        // Mirrors `WPCOM_REST_API_V2_Endpoint_Site_Activity::$backup_action_names`.
733        // Pinned here (and overriding any caller-supplied `action`) so the
734        // helper is always scoped to backups regardless of what the caller passes.
735        $args['action'] = array(
736            'backup_complete_full',
737            'backup_complete_initial',
738            'backup_only_complete_full',
739            'backup_only_complete_initial',
740            'rewind__backup_complete_full',
741            'rewind__backup_complete_initial',
742            'rewind__backup_only_complete_full',
743            'rewind__backup_only_complete_initial',
744        );
745
746        $path = '/sites/' . (int) $blog_id . '/activity?' . http_build_query( $args );
747
748        $response = Client::wpcom_json_api_request_as_user(
749            $path,
750            'v2',
751            array(),
752            null,
753            'wpcom'
754        );
755
756        // Cast, as everywhere else this package reads a status. Uncast, a
757        // numeric-string `'200'` discards a good activity page and the
758        // `jetpack-backup/list-backup-events` ability reports that the site
759        // has completed no backups — `unwrap_response()` flattens this
760        // `null` into an empty list, which is a claim rather than an error.
761        if ( 200 !== (int) wp_remote_retrieve_response_code( $response ) ) {
762            return null;
763        }
764
765        return rest_ensure_response(
766            json_decode( $response['body'], true )
767        );
768    }
769
770    /**
771     * Gets information about the currently promoted backup product.
772     *
773     * Answers from a per-locale transient when one is warm; failures are not cached.
774     *
775     * @return object|WP_Error The promoted product, or a WP_Error if it could not be read.
776     */
777    public static function get_backup_promoted_product_info() {
778        $locale        = get_user_locale();
779        $transient_key = self::PROMOTED_PRODUCT_TRANSIENT_PREFIX . sanitize_key( $locale );
780        $cached        = get_transient( $transient_key );
781
782        if ( false !== $cached ) {
783            return $cached;
784        }
785
786        $request_url   = 'https://public-api.wordpress.com/rest/v1.1/products?locale=' . $locale . '&type=jetpack';
787        $wpcom_request = wp_remote_get( esc_url_raw( $request_url ) );
788        // Cast: the transport may report the status as a numeric string, which
789        // a strict comparison against 200 sends down the failure path.
790        $response_code = (int) wp_remote_retrieve_response_code( $wpcom_request );
791
792        if ( 200 !== $response_code ) {
793            return new WP_Error(
794                'failed_to_fetch_data',
795                esc_html__( 'Unable to fetch the requested data.', 'jetpack-backup-pkg' ),
796                array(
797                    // A transport failure has no status at all; reporting 0 would
798                    // leave the REST layer with nothing to serve.
799                    'status'  => $response_code ? $response_code : 500,
800                    'request' => $wpcom_request,
801                )
802            );
803        }
804
805        $products = json_decode( wp_remote_retrieve_body( $wpcom_request ) );
806
807        // A 200 is not a promise that the promoted product is in the body. A
808        // truncated response decodes to null, and the slug is a constant here
809        // but a catalogue entry upstream — retiring it there leaves this a 200
810        // with the key absent. Reading through either emits a PHP warning and
811        // yields null, which the route then serves as a 200 carrying `null`:
812        // indistinguishable, to a caller, from a priced answer it failed to
813        // read. Refusing says which of the two happened.
814        if ( ! is_object( $products ) || ! isset( $products->{ self::JETPACK_BACKUP_PROMOTED_PRODUCT } ) ) {
815            return new WP_Error(
816                'promoted_product_unreadable',
817                esc_html__( 'Unable to read the promoted product information.', 'jetpack-backup-pkg' ),
818                array( 'status' => 500 )
819            );
820        }
821
822        $product = $products->{ self::JETPACK_BACKUP_PROMOTED_PRODUCT };
823
824        // Must stay below both guards: a cached failure would leave the no-plan
825        // screen without a price for the whole TTL after WordPress.com recovered.
826        set_transient( $transient_key, $product, self::PROMOTED_PRODUCT_CACHE_TTL );
827
828        return $product;
829    }
830
831    /**
832     * Check for user licenses.
833     *
834     * @param boolean $has_license If the user already has a license found.
835     * @param array   $licenses List of unattached licenses belonging to the user.
836     * @param string  $plugin_slug The plugin that initiated the flow.
837     *
838     * @return boolean
839     */
840    public static function jetpack_check_user_licenses( $has_license, $licenses, $plugin_slug ) {
841        if ( $plugin_slug !== static::JETPACK_BACKUP_SLUG || $has_license ) {
842            return $has_license;
843        }
844
845        $license_found = false;
846
847        foreach ( $licenses as $license ) {
848            if ( in_array( $license->product_id, static::JETPACK_BACKUP_PRODUCT_IDS, true ) ) {
849                $license_found = true;
850                break;
851            }
852        }
853
854        // Checking for existing backup plan is costly, so only check if there's an appropriate license.
855        return $license_found && ! static::has_backup_plan();
856    }
857
858    /**
859     * Returns the result of `/upgrades` endpoint call.
860     *
861     * @return \WP_REST_Response|WP_Error The site purchases, or a WP_Error if WordPress.com could not be reached.
862     */
863    public static function get_site_current_purchases() {
864
865        $request  = sprintf( '/upgrades?site=%d', Jetpack_Options::get_option( 'id' ) );
866        $response = Client::wpcom_json_api_request_as_blog( $request, '1.2' );
867
868        // Bail if there was an error or malformed response.
869        if ( is_wp_error( $response ) || ! is_array( $response ) || ! isset( $response['body'] ) ) {
870            return self::get_failed_fetch_error();
871        }
872
873        $response_code = (int) wp_remote_retrieve_response_code( $response );
874
875        if ( 200 !== $response_code ) {
876            return self::get_failed_fetch_error( $response_code );
877        }
878
879        return rest_ensure_response(
880            json_decode( $response['body'], true )
881        );
882    }
883
884    /**
885     * Set value of the dismissed_backup_review_request Jetack option.
886     * Get value if should_dismiss is false
887     *
888     * @access public
889     * @static
890     * @param array $request arguments should_dismiss and option_name.
891     * @return bool value of option if value is requested | updated or not if value is updated.
892     */
893    public static function manage_dismissed_backup_review_request( $request ) {
894
895        if ( ! $request['should_dismiss'] ) {
896
897            return rest_ensure_response(
898                Jetpack_Options::get_option( 'dismissed_backup_review_' . $request['option_name'] )
899            );
900        }
901
902        return Jetpack_Options::update_option( 'dismissed_backup_review_' . $request['option_name'], true );
903    }
904
905    /**
906     * Get site storage size
907     *
908     * @return \WP_REST_Response|WP_Error The site storage size, or a WP_Error if WordPress.com could not be reached.
909     */
910    public static function get_site_backup_size() {
911        $blog_id = Jetpack_Options::get_option( 'id' );
912
913        $response = Client::wpcom_json_api_request_as_user(
914            '/sites/' . $blog_id . '/rewind/size?force=wpcom',
915            'v2',
916            array(),
917            null,
918            'wpcom'
919        );
920
921        $response_code = (int) wp_remote_retrieve_response_code( $response );
922
923        if ( 200 !== $response_code ) {
924            return self::get_failed_fetch_error( $response_code );
925        }
926
927        return rest_ensure_response(
928            json_decode( $response['body'], true )
929        );
930    }
931
932    /**
933     * Get site policies from WPCOM. It includes the storage limit and activity log limit, if apply.
934     *
935     * @return \WP_REST_Response|WP_Error The site storage policies, or a WP_Error if WordPress.com could not be reached.
936     */
937    public static function get_site_backup_policies() {
938        $blog_id = Jetpack_Options::get_option( 'id' );
939
940        $response = Client::wpcom_json_api_request_as_user(
941            '/sites/' . $blog_id . '/rewind/policies?force=wpcom',
942            'v2',
943            array(),
944            null,
945            'wpcom'
946        );
947
948        $response_code = (int) wp_remote_retrieve_response_code( $response );
949
950        if ( 200 !== $response_code ) {
951            return self::get_failed_fetch_error( $response_code );
952        }
953
954        return rest_ensure_response(
955            json_decode( $response['body'], true )
956        );
957    }
958
959    /**
960     * Get suggested storage addon based on storage usage
961     *
962     * @param int $bytes_used      Storage used.
963     * @param int $bytes_available Storage limit.
964     * @return string Suggested addon storage slug
965     */
966    public static function get_storage_addon_upsell_slug( $bytes_used, $bytes_available ) {
967        $bytes_10gb  = 10 * 1024 * 1024 * 1024; // 10GB in bytes
968        $bytes_100gb = 100 * 1024 * 1024 * 1024; // 100GB in bytes
969        $bytes_1tb   = 1024 * 1024 * 1024 * 1024; // 1TB in bytes
970
971        $upsell_products = array(
972            $bytes_10gb  => 'jetpack_backup_addon_storage_10gb_monthly',
973            $bytes_100gb => 'jetpack_backup_addon_storage_100gb_monthly',
974            $bytes_1tb   => 'jetpack_backup_addon_storage_1tb_monthly',
975        );
976
977        // If usage has crossed over the storage limit, then dynamically calculate the upgrade option
978        if ( $bytes_used > $bytes_available ) {
979            $additional_bytes_used = $bytes_used - $bytes_available;
980
981            // Add aditional 25% buffer
982            $additional_bytes_needed = $additional_bytes_used + $additional_bytes_used * 0.25;
983
984            // Since 1TB is our max upgrade but the additional storage needed is greater than 1TB, then just return 1TB
985            if ( $additional_bytes_needed > $bytes_1tb ) {
986                return $upsell_products[ $bytes_1tb ];
987            }
988
989            $matched_bytes = $bytes_10gb;
990            foreach ( $upsell_products as $bytes => $product ) {
991                if ( $bytes > $additional_bytes_needed ) {
992                    $matched_bytes = $bytes;
993                    break;
994                }
995            }
996
997            return $upsell_products[ $matched_bytes ];
998        }
999
1000        // For 1 TB we are going to offer 1 TB by default
1001        if ( $bytes_1tb === $bytes_available ) {
1002            return $upsell_products[ $bytes_1tb ];
1003        }
1004
1005        // Otherwise, we are going to offer 10 GB
1006        return $upsell_products[ $bytes_10gb ];
1007    }
1008
1009    /**
1010     * Get the best addon offer for this site, including pricing details
1011     *
1012     * @param \WP_REST_Request $request Object including storage usage.
1013     *
1014     * @return string|WP_Error A JSON object with the suggested storage addon details if the request was successful,
1015     *                         or a WP_Error otherwise.
1016     */
1017    public static function get_site_backup_addon_offer( $request ) {
1018        $suggested_addon = self::get_storage_addon_upsell_slug(
1019            $request['storage_size'],
1020            $request['storage_limit']
1021        );
1022
1023        $addons_size_text_map = array(
1024            'jetpack_backup_addon_storage_10gb_monthly'  => '10GB',
1025            'jetpack_backup_addon_storage_100gb_monthly' => '100GB',
1026            'jetpack_backup_addon_storage_1tb_monthly'   => '1TB',
1027        );
1028
1029        // Fetch addon storage price information
1030        $pricing_info = Wpcom_Products::get_product_pricing( $suggested_addon );
1031
1032        // Response
1033        $response = array(
1034            'slug'      => $suggested_addon,
1035            'size_text' => $addons_size_text_map[ $suggested_addon ],
1036            'pricing'   => $pricing_info,
1037        );
1038
1039        return rest_ensure_response( $response );
1040    }
1041
1042    /**
1043     * Enqueue a new backup on demand
1044     *
1045     * @return \WP_REST_Response|WP_Error The enqueue result, or a WP_Error if WordPress.com could not be reached.
1046     */
1047    public static function enqueue_backup() {
1048        $blog_id  = Jetpack_Options::get_option( 'id' );
1049        $endpoint = sprintf( '/sites/%d/rewind/backups/enqueue', $blog_id );
1050
1051        $response = Client::wpcom_json_api_request_as_user(
1052            $endpoint,
1053            'v2',
1054            array(
1055                'method' => 'POST',
1056            ),
1057            null,
1058            'wpcom'
1059        );
1060
1061        $response_code = (int) wp_remote_retrieve_response_code( $response );
1062
1063        if ( 200 !== $response_code ) {
1064            return self::get_failed_fetch_error( $response_code );
1065        }
1066
1067        return rest_ensure_response(
1068            json_decode( $response['body'], true )
1069        );
1070    }
1071
1072    /**
1073     * Get site backup schedule time
1074     *
1075     * @return \WP_REST_Response|WP_Error The backup schedule time, or a WP_Error if WordPress.com could not be reached.
1076     */
1077    public static function get_site_backup_schedule_time() {
1078        $blog_id = Jetpack_Options::get_option( 'id' );
1079
1080        $response = Client::wpcom_json_api_request_as_user(
1081            '/sites/' . $blog_id . '/rewind/scheduled',
1082            'v2',
1083            array(),
1084            null,
1085            'wpcom'
1086        );
1087
1088        $response_code = (int) wp_remote_retrieve_response_code( $response );
1089
1090        if ( 200 !== $response_code ) {
1091            return self::get_failed_fetch_error( $response_code );
1092        }
1093
1094        return rest_ensure_response(
1095            json_decode( $response['body'], true )
1096        );
1097    }
1098
1099    /**
1100     * Removes plugin from the connection manager
1101     * If it's the last plugin using the connection, the site will be disconnected.
1102     *
1103     * @access public
1104     * @static
1105     */
1106    public static function plugin_deactivation() {
1107        $manager = new Connection_Manager( 'jetpack-backup' );
1108        $manager->remove_connection();
1109    }
1110
1111    /**
1112     * Load wp-build when modernization is enabled on the Backup admin page.
1113     *
1114     * @return void
1115     */
1116    public static function maybe_load_wp_build() {
1117        if ( ! self::is_modernized() || ! self::is_backup_admin_request() ) {
1118            return;
1119        }
1120
1121        self::load_wp_build();
1122
1123        // wp-build registers standalone modules (e.g. the init module) on
1124        // wp_default_scripts, which has already fired by admin_menu. Register them
1125        // directly so the init module makes it into the import map.
1126        if ( function_exists( 'jetpack_backup_register_script_modules' ) ) {
1127            jetpack_backup_register_script_modules(); // @phan-suppress-current-line PhanUndeclaredFunction -- Checked with function_exists(); defined in the generated build/modules.php, which Phan excludes.
1128        }
1129
1130        add_action( 'current_screen', array( __CLASS__, 'alias_screen_id_for_wp_build' ) );
1131        add_action( 'admin_print_scripts', array( __CLASS__, 'render_connection_initial_state' ), 1 );
1132    }
1133
1134    /**
1135     * Emit `window.JP_CONNECTION_INITIAL_STATE` inline on the modernized
1136     * Backup admin page.
1137     *
1138     * The modernized enqueue path short-circuits before the legacy
1139     * `Connection_Initial_State::render_script()` call, so without this
1140     * the React `<Gates>` component never sees the connection state and
1141     * sits on its loading skeleton forever. We emit the same JS payload
1142     * the legacy path emits, just outside of a registered script handle
1143     * (wp-build's handles aren't reliable here, and the global is
1144     * page-scoped — any tag setting it works).
1145     *
1146     * @return void
1147     */
1148    public static function render_connection_initial_state() {
1149        echo '<script id="jetpack-backup-connection-initial-state">'
1150            . Connection_Initial_State::render() // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- render() returns pre-escaped JSON.
1151            . '</script>';
1152    }
1153
1154    /**
1155     * Load the wp-build entry file and register its polyfills.
1156     *
1157     * Only called on `?page=jetpack-backup` admin requests when the
1158     * modernization filter is enabled. Keeps wp-build off every other request.
1159     *
1160     * @return void
1161     */
1162    private static function load_wp_build() {
1163        $build_index = dirname( __DIR__ ) . '/build/build.php';
1164
1165        if ( ! file_exists( $build_index ) ) {
1166            return;
1167        }
1168
1169        require_once $build_index;
1170
1171        \Automattic\Jetpack\WP_Build_Polyfills\WP_Build_Polyfills::register(
1172            'jetpack-backup',
1173            array_merge(
1174                \Automattic\Jetpack\WP_Build_Polyfills\WP_Build_Polyfills::SCRIPT_HANDLES,
1175                \Automattic\Jetpack\WP_Build_Polyfills\WP_Build_Polyfills::MODULE_IDS
1176            )
1177        );
1178    }
1179
1180    /**
1181     * Alias the current screen ID to satisfy wp-build's auto-generated enqueue check.
1182     *
1183     * Wp-build's `<page>-wp-admin` enqueue callback enqueues only when the screen ID
1184     * matches the wp-build page slug (`jetpack-backup-dashboard`). Our WP-admin
1185     * menu slug stays `jetpack-backup`, so we mutate the screen object in place
1186     * to make the check pass without changing the user-facing URL.
1187     *
1188     * Hooked only when modernization is on AND we're on the Backup admin page,
1189     * so this never affects any other request.
1190     *
1191     * @param \WP_Screen|null $screen The current screen object (passed by WP).
1192     * @return void
1193     */
1194    public static function alias_screen_id_for_wp_build( $screen ) {
1195        if ( ! is_object( $screen ) ) {
1196            return;
1197        }
1198
1199        $screen->id = 'jetpack-backup-dashboard';
1200    }
1201
1202    /**
1203     * Returns true when the wp-build modernization filter is enabled.
1204     *
1205     * @since 4.3.14 Changed from private to public; the REST bridges gate their route registration on it.
1206     *
1207     * @return bool
1208     */
1209    public static function is_modernized() {
1210        return (bool) apply_filters( self::MODERNIZATION_FILTER, false );
1211    }
1212
1213    /**
1214     * Returns true when the modernization filter is on AND the wp-build dashboard loaded.
1215     *
1216     * `build/` is gitignored, so the render function is absent in any unbuilt checkout
1217     * and in any release whose wp-build step failed. Every consumer of the modernized
1218     * surface has to agree on this, or the menu falls back to the legacy page while the
1219     * enqueue path skips the legacy script — an empty div with no JS.
1220     *
1221     * Only meaningful once `maybe_load_wp_build()` has run. It is hooked on `admin_menu`
1222     * at the same priority as `add_wp_admin_submenu()`, so registration order — not
1223     * priority — is what keeps it first. Do not reorder those two `add_action()` calls.
1224     *
1225     * @return bool
1226     */
1227    private static function is_wp_build_dashboard_active() {
1228        return self::is_modernized() && function_exists( 'jetpack_backup_jetpack_backup_dashboard_wp_admin_render_page' );
1229    }
1230
1231    /**
1232     * Returns true when the current request targets the Backup admin page.
1233     *
1234     * Used to scope wp-build loading to the one page that needs it. The
1235     * `$_GET['page']` value is populated by wp-admin/admin.php before any of
1236     * our hooks fire, so this check is reliable from `initialize()` onwards.
1237     *
1238     * @return bool
1239     */
1240    private static function is_backup_admin_request() {
1241        if ( ! is_admin() || ! isset( $_GET['page'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
1242            return false;
1243        }
1244
1245        return sanitize_text_field( wp_unslash( $_GET['page'] ) ) === self::JETPACK_BACKUP_SLUG; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
1246    }
1247}