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6
1<?php
2/**
3 * Themes sync module.
4 *
5 * @package automattic/jetpack-sync
6 */
7
8namespace Automattic\Jetpack\Sync\Modules;
9
10if ( ! defined( 'ABSPATH' ) ) {
11    exit( 0 );
12}
13
14/**
15 * Class to handle sync for themes.
16 */
17class Themes extends Module {
18    /**
19     * Sync module name.
20     *
21     * @access public
22     *
23     * @return string
24     */
25    public function name() {
26        return 'themes';
27    }
28
29    /**
30     * Initialize themes action listeners.
31     *
32     * @access public
33     *
34     * @param callable $callable Action handler callable.
35     */
36    public function init_listeners( $callable ) {
37        add_action( 'switch_theme', array( $this, 'sync_theme_support' ), 10, 3 );
38        add_action( 'jetpack_sync_current_theme_support', $callable, 10, 2 );
39        add_action( 'upgrader_process_complete', array( $this, 'check_upgrader' ), 10, 2 );
40        add_action( 'jetpack_installed_theme', $callable, 10, 2 );
41        add_action( 'jetpack_updated_themes', $callable, 10, 2 );
42        add_filter( 'wp_redirect', array( $this, 'detect_theme_edit' ) );
43        add_action( 'jetpack_edited_theme', $callable, 10, 2 );
44        add_action( 'wp_ajax_edit-theme-plugin-file', array( $this, 'theme_edit_ajax' ), 0 );
45        add_action( 'update_site_option_allowedthemes', array( $this, 'sync_network_allowed_themes_change' ), 10, 4 );
46        add_action( 'jetpack_network_disabled_themes', $callable, 10, 2 );
47        add_action( 'jetpack_network_enabled_themes', $callable, 10, 2 );
48
49        // Theme deletions.
50        add_action( 'deleted_theme', array( $this, 'detect_theme_deletion' ), 10, 2 );
51        add_action( 'jetpack_deleted_theme', $callable, 10, 2 );
52
53        // Sidebar updates.
54        add_action( 'update_option_sidebars_widgets', array( $this, 'sync_sidebar_widgets_actions' ), 10, 2 );
55
56        add_action( 'jetpack_widget_added', $callable, 10, 4 );
57        add_action( 'jetpack_widget_removed', $callable, 10, 4 );
58        add_action( 'jetpack_widget_moved_to_inactive', $callable, 10, 2 );
59        add_action( 'jetpack_cleared_inactive_widgets', $callable );
60        add_action( 'jetpack_widget_reordered', $callable, 10, 2 );
61        add_filter( 'widget_update_callback', array( $this, 'sync_widget_edit' ), 10, 4 );
62        add_action( 'jetpack_widget_edited', $callable );
63    }
64
65    /**
66     * Sync handler for a widget edit.
67     *
68     * @access public
69     *
70     * @param array      $instance      The current widget instance's settings.
71     * @param array      $new_instance  Array of new widget settings.
72     * @param array      $old_instance  Array of old widget settings.
73     * @param \WP_Widget $widget_object The current widget instance.
74     * @return array The current widget instance's settings.
75     */
76    public function sync_widget_edit( $instance, $new_instance, $old_instance, $widget_object ) {
77        if ( empty( $old_instance ) ) {
78            return $instance;
79        }
80
81        // Don't trigger sync action if this is an ajax request, because Customizer makes them during preview before saving changes.
82        // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Not doing anything with or in response to the $_POST data. We're only using $_POST['customized'] to early return if this is an ajax request from Customizer.
83        if ( defined( 'DOING_AJAX' ) && DOING_AJAX && isset( $_POST['customized'] ) ) {
84            return $instance;
85        }
86
87        $widget = array(
88            'name'  => $widget_object->name,
89            'id'    => $widget_object->id,
90            'title' => isset( $new_instance['title'] ) ? $new_instance['title'] : '',
91        );
92        /**
93         * Trigger action to alert $callable sync listener that a widget was edited.
94         *
95         * @since 1.6.3
96         * @since-jetpack 5.0.0
97         *
98         * @param string $widget_name , Name of edited widget
99         */
100        do_action( 'jetpack_widget_edited', $widget );
101
102        return $instance;
103    }
104
105    /**
106     * Sync handler for network allowed themes change.
107     *
108     * @access public
109     *
110     * @param string $option     Name of the network option.
111     * @param mixed  $value      Current value of the network option.
112     * @param mixed  $old_value  Old value of the network option.
113     * @param int    $network_id ID of the network.
114     */
115    public function sync_network_allowed_themes_change( $option, $value, $old_value, $network_id ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
116        $all_enabled_theme_slugs = array_keys( $value );
117        $old_value_count         = is_countable( $old_value ) ? count( $old_value ) : 0;
118        $value_count             = is_countable( $value ) ? count( $value ) : 0;
119
120        if ( $old_value_count > $value_count ) {
121            // Suppress jetpack_network_disabled_themes sync action when theme is deleted.
122            $delete_theme_call = $this->get_delete_theme_call();
123            if ( ! empty( $delete_theme_call ) ) {
124                return;
125            }
126
127            $newly_disabled_theme_names = array_keys( array_diff_key( $old_value, $value ) );
128            $newly_disabled_themes      = $this->get_theme_details_for_slugs( $newly_disabled_theme_names );
129            /**
130             * Trigger action to alert $callable sync listener that network themes were disabled.
131             *
132             * @since 1.6.3
133             * @since-jetpack 5.0.0
134             *
135             * @param mixed $newly_disabled_themes, Array of info about network disabled themes
136             * @param mixed $all_enabled_theme_slugs, Array of slugs of all enabled themes
137             */
138            do_action( 'jetpack_network_disabled_themes', $newly_disabled_themes, $all_enabled_theme_slugs );
139            return;
140        }
141
142        $newly_enabled_theme_names = array_keys( array_diff_key( $value, $old_value ) );
143        $newly_enabled_themes      = $this->get_theme_details_for_slugs( $newly_enabled_theme_names );
144        /**
145         * Trigger action to alert $callable sync listener that network themes were enabled
146         *
147         * @since 1.6.3
148         * @since-jetpack 5.0.0
149         *
150         * @param mixed $newly_enabled_themes , Array of info about network enabled themes
151         * @param mixed $all_enabled_theme_slugs, Array of slugs of all enabled themes
152         */
153        do_action( 'jetpack_network_enabled_themes', $newly_enabled_themes, $all_enabled_theme_slugs );
154    }
155
156    /**
157     * Retrieve details for one or more themes by their slugs.
158     *
159     * @access private
160     *
161     * @param array $theme_slugs Theme slugs.
162     * @return array Details for the themes.
163     */
164    private function get_theme_details_for_slugs( $theme_slugs ) {
165        $theme_data = array();
166        foreach ( $theme_slugs as $slug ) {
167            $theme               = wp_get_theme( $slug );
168            $theme_data[ $slug ] = array(
169                'name'    => $theme->get( 'Name' ),
170                'version' => $theme->get( 'Version' ),
171                'uri'     => $theme->get( 'ThemeURI' ),
172                'slug'    => $slug,
173            );
174        }
175        return $theme_data;
176    }
177
178    /**
179     * Detect a theme edit during a redirect.
180     *
181     * @access public
182     *
183     * @param string $redirect_url Redirect URL.
184     * @return string Redirect URL.
185     */
186    public function detect_theme_edit( $redirect_url ) {
187        $url              = wp_parse_url( admin_url( $redirect_url ) );
188        $theme_editor_url = wp_parse_url( admin_url( 'theme-editor.php' ) );
189
190        if ( $theme_editor_url['path'] !== $url['path'] ) {
191            return $redirect_url;
192        }
193
194        $query_params = array();
195        wp_parse_str( $url['query'], $query_params );
196        if (
197            ! isset( $_POST['newcontent'] ) || // phpcs:ignore WordPress.Security.NonceVerification.Missing -- 'wp_redirect' gets fired for a lot of things. We're only using $_POST['newcontent'] to limit action to redirects from theme edits, we're not doing anything with or in response to the post itself.
198            ! isset( $query_params['file'] ) ||
199            ! isset( $query_params['theme'] ) ||
200            ! isset( $query_params['updated'] )
201        ) {
202            return $redirect_url;
203        }
204        $theme      = wp_get_theme( $query_params['theme'] );
205        $theme_data = array(
206            'name'    => $theme->get( 'Name' ),
207            'version' => $theme->get( 'Version' ),
208            'uri'     => $theme->get( 'ThemeURI' ),
209        );
210
211        /**
212         * Trigger action to alert $callable sync listener that a theme was edited.
213         *
214         * @since 1.6.3
215         * @since-jetpack 5.0.0
216         *
217         * @param string $query_params['theme'], Slug of edited theme
218         * @param string $theme_data, Information about edited them
219         */
220        do_action( 'jetpack_edited_theme', $query_params['theme'], $theme_data );
221
222        return $redirect_url;
223    }
224
225    /**
226     * Handler for AJAX theme editing.
227     *
228     * @todo Refactor to use WP_Filesystem instead of fopen()/fclose().
229     */
230    public function theme_edit_ajax() {
231        // This validation is based on wp_edit_theme_plugin_file().
232        if ( empty( $_POST['theme'] ) ) {
233            return;
234        }
235
236        if ( empty( $_POST['file'] ) ) {
237            return;
238        }
239        $file = wp_unslash( $_POST['file'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Validated manually just after.
240        if ( 0 !== validate_file( $file ) ) {
241            return;
242        }
243
244        if ( ! isset( $_POST['newcontent'] ) ) {
245            return;
246        }
247
248        if ( ! isset( $_POST['nonce'] ) ) {
249            return;
250        }
251
252        $stylesheet = wp_unslash( $_POST['theme'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Validated manually just after.
253        if ( 0 !== validate_file( $stylesheet ) ) {
254            return;
255        }
256
257        if ( ! current_user_can( 'edit_themes' ) ) {
258            return;
259        }
260
261        $theme = wp_get_theme( $stylesheet );
262        if ( ! $theme->exists() ) {
263            return;
264        }
265
266        if ( ! wp_verify_nonce( $_POST['nonce'], 'edit-theme_' . $stylesheet . '_' . $file ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- WP core doesn't pre-sanitize nonces either.
267            return;
268        }
269
270        if ( $theme->errors() && 'theme_no_stylesheet' === $theme->errors()->get_error_code() ) {
271            return;
272        }
273
274        $editable_extensions = wp_get_theme_file_editable_extensions( $theme );
275
276        $allowed_files = array();
277        foreach ( $editable_extensions as $type ) {
278            switch ( $type ) {
279                case 'php':
280                    $allowed_files = array_merge( $allowed_files, $theme->get_files( 'php', -1 ) );
281                    break;
282                case 'css':
283                    $style_files                = $theme->get_files( 'css', -1 );
284                    $allowed_files['style.css'] = $style_files['style.css'];
285                    $allowed_files              = array_merge( $allowed_files, $style_files );
286                    break;
287                default:
288                    $allowed_files = array_merge( $allowed_files, $theme->get_files( $type, -1 ) );
289                    break;
290            }
291        }
292
293        $real_file = $theme->get_stylesheet_directory() . '/' . $file;
294        if ( 0 !== validate_file( $real_file, $allowed_files ) ) {
295            return;
296        }
297
298        // Ensure file is real.
299        if ( ! is_file( $real_file ) ) {
300            return;
301        }
302
303        // Ensure file extension is allowed.
304        $extension = null;
305        if ( preg_match( '/\.([^.]+)$/', $real_file, $matches ) ) {
306            $extension = strtolower( $matches[1] );
307            if ( ! in_array( $extension, $editable_extensions, true ) ) {
308                return;
309            }
310        }
311
312        // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_is_writable
313        if ( ! is_writable( $real_file ) ) {
314            return;
315        }
316
317        // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fopen
318        $file_pointer = fopen( $real_file, 'w+' );
319        if ( false === $file_pointer ) {
320            return;
321        }
322        // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fclose
323        fclose( $file_pointer );
324
325        $theme_data = array(
326            'name'    => $theme->get( 'Name' ),
327            'version' => $theme->get( 'Version' ),
328            'uri'     => $theme->get( 'ThemeURI' ),
329        );
330
331        /**
332         * This action is documented already in this file.
333         */
334        do_action( 'jetpack_edited_theme', $stylesheet, $theme_data );
335    }
336
337    /**
338     * Detect a theme deletion.
339     *
340     * @access public
341     *
342     * @param string $stylesheet Stylesheet of the theme to delete.
343     * @param bool   $deleted    Whether the theme deletion was successful.
344     */
345    public function detect_theme_deletion( $stylesheet, $deleted ) {
346        $theme      = wp_get_theme( $stylesheet );
347        $theme_data = array(
348            'name'    => $theme->get( 'Name' ),
349            'version' => $theme->get( 'Version' ),
350            'uri'     => $theme->get( 'ThemeURI' ),
351            'slug'    => $stylesheet,
352        );
353
354        if ( $deleted ) {
355            /**
356             * Signals to the sync listener that a theme was deleted and a sync action
357             * reflecting the deletion and theme slug should be sent
358             *
359             * @since 1.6.3
360             * @since-jetpack 5.0.0
361             *
362             * @param string $stylesheet Theme slug
363             * @param array  $theme_data Theme info Since 5.3
364             */
365            do_action( 'jetpack_deleted_theme', $stylesheet, $theme_data );
366        }
367    }
368
369    /**
370     * Handle an upgrader completion action.
371     *
372     * @access public
373     *
374     * @param \WP_Upgrader $upgrader The upgrader instance.
375     * @param array        $details  Array of bulk item update data.
376     */
377    public function check_upgrader( $upgrader, $details ) {
378        if ( ! isset( $details['type'] ) ||
379            'theme' !== $details['type'] ||
380            is_wp_error( $upgrader->skin->result ) ||
381            ! method_exists( $upgrader, 'theme_info' )
382        ) {
383            return;
384        }
385
386        if ( 'install' === $details['action'] ) {
387            // @phan-suppress-next-line PhanUndeclaredMethod -- Checked above. See also https://github.com/phan/phan/issues/1204.
388            $theme = $upgrader->theme_info();
389            if ( ! $theme instanceof \WP_Theme ) {
390                return;
391            }
392            $theme_info = array(
393                'name'    => $theme->get( 'Name' ),
394                'version' => $theme->get( 'Version' ),
395                'uri'     => $theme->get( 'ThemeURI' ),
396            );
397
398            /**
399             * Signals to the sync listener that a theme was installed and a sync action
400             * reflecting the installation and the theme info should be sent
401             *
402             * @since 1.6.3
403             * @since-jetpack 4.9.0
404             *
405             * @param string $theme->theme_root Text domain of the theme
406             * @param mixed $theme_info Array of abbreviated theme info
407             */
408            do_action( 'jetpack_installed_theme', $theme->stylesheet, $theme_info );
409        }
410
411        if ( 'update' === $details['action'] ) {
412            $themes = array();
413
414            if ( empty( $details['themes'] ) && isset( $details['theme'] ) ) {
415                $details['themes'] = array( $details['theme'] );
416            }
417
418            foreach ( $details['themes'] as $theme_slug ) {
419                $theme = wp_get_theme( $theme_slug );
420
421                if ( ! $theme instanceof \WP_Theme ) {
422                    continue;
423                }
424
425                $themes[ $theme_slug ] = array(
426                    'name'       => $theme->get( 'Name' ),
427                    'version'    => $theme->get( 'Version' ),
428                    'uri'        => $theme->get( 'ThemeURI' ),
429                    'stylesheet' => $theme->stylesheet,
430                );
431            }
432
433            if ( empty( $themes ) ) {
434                return;
435            }
436
437            /**
438             * Signals to the sync listener that one or more themes was updated and a sync action
439             * reflecting the update and the theme info should be sent
440             *
441             * @since 1.6.3
442             * @since-jetpack 6.2.0
443             *
444             * @param mixed $themes Array of abbreviated theme info
445             */
446            do_action( 'jetpack_updated_themes', $themes );
447        }
448    }
449
450    /**
451     * Initialize themes action listeners for full sync.
452     *
453     * @access public
454     *
455     * @param callable $callable Action handler callable.
456     */
457    public function init_full_sync_listeners( $callable ) {
458        add_action( 'jetpack_full_sync_theme_data', $callable );
459    }
460
461    /**
462     * Handle a theme switch.
463     *
464     * @access public
465     *
466     * @param string    $new_name  Name of the new theme.
467     * @param \WP_Theme $new_theme The new theme.
468     * @param \WP_Theme $old_theme The previous theme.
469     */
470    public function sync_theme_support( $new_name, $new_theme = null, $old_theme = null ) {
471        $previous_theme = $this->get_theme_info( $old_theme );
472
473        /**
474         * Fires when the client needs to sync theme support info
475         *
476         * @since 1.6.3
477         * @since-jetpack 4.2.0
478         *
479         * @param array the theme support array
480         * @param array the previous theme since Jetpack 6.5.0
481         */
482        do_action( 'jetpack_sync_current_theme_support', $this->get_theme_info(), $previous_theme );
483    }
484
485    /**
486     * Enqueue the themes actions for full sync.
487     *
488     * @access public
489     *
490     * @param array   $config               Full sync configuration for this sync module.
491     * @param int     $max_items_to_enqueue Maximum number of items to enqueue.
492     * @param boolean $state                True if full sync has finished enqueueing this module, false otherwise.
493     * @return array  Number of actions enqueued, and next module state.
494     */
495    public function enqueue_full_sync_actions( $config, $max_items_to_enqueue, $state ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
496        /**
497         * Tells the client to sync all theme data to the server
498         *
499         * @since 1.6.3
500         * @since-jetpack 4.2.0
501         *
502         * @param boolean Whether to expand theme data (should always be true)
503         */
504        do_action( 'jetpack_full_sync_theme_data', true );
505
506        // The number of actions enqueued, and next module state (true == done).
507        return array( 1, true );
508    }
509
510    /**
511     * Send the themes actions for full sync.
512     *
513     * @access public
514     *
515     * @param array $config Full sync configuration for this sync module.
516     * @param array $status This module Full Sync status.
517     * @param int   $send_until The timestamp until the current request can send.
518     * @param int   $started The timestamp when the full sync started.
519     *
520     * @return array This module Full Sync status.
521     */
522    public function send_full_sync_actions( $config, $status, $send_until, $started ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
523        // we call this instead of do_action when sending immediately.
524        $result = $this->send_action( 'jetpack_full_sync_theme_data', array( true ) );
525
526        if ( is_wp_error( $result ) ) {
527            $status['error'] = true;
528            return $status;
529        }
530        $status['finished'] = true;
531        $status['sent']     = $status['total'];
532        return $status;
533    }
534
535    /**
536     * Retrieve an estimated number of actions that will be enqueued.
537     *
538     * @access public
539     *
540     * @param array $config Full sync configuration for this sync module.
541     * @return int Number of items yet to be enqueued.
542     */
543    public function estimate_full_sync_actions( $config ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
544        return 1;
545    }
546
547    /**
548     * Initialize the module in the sender.
549     *
550     * @access public
551     */
552    public function init_before_send() {
553        add_filter( 'jetpack_sync_before_send_jetpack_full_sync_theme_data', array( $this, 'expand_theme_data' ) );
554    }
555
556    /**
557     * Retrieve the actions that will be sent for this module during a full sync.
558     *
559     * @access public
560     *
561     * @return array Full sync actions of this module.
562     */
563    public function get_full_sync_actions() {
564        return array( 'jetpack_full_sync_theme_data' );
565    }
566
567    /**
568     * Expand the theme within a hook before it is serialized and sent to the server.
569     *
570     * @access public
571     *
572     * @return array Theme data.
573     */
574    public function expand_theme_data() {
575        return array( $this->get_theme_info() );
576    }
577
578    /**
579     * Retrieve the name of the widget by the widget ID.
580     *
581     * @access public
582     * @global $wp_registered_widgets
583     *
584     * @param string $widget_id Widget ID.
585     * @return string Name of the widget, or null if not found.
586     */
587    public function get_widget_name( $widget_id ) {
588        global $wp_registered_widgets;
589        return ( isset( $wp_registered_widgets[ $widget_id ] ) ? $wp_registered_widgets[ $widget_id ]['name'] : null );
590    }
591
592    /**
593     * Retrieve the name of the sidebar by the sidebar ID.
594     *
595     * @access public
596     * @global $wp_registered_sidebars
597     *
598     * @param string $sidebar_id Sidebar ID.
599     * @return string Name of the sidebar, or null if not found.
600     */
601    public function get_sidebar_name( $sidebar_id ) {
602        global $wp_registered_sidebars;
603        return ( isset( $wp_registered_sidebars[ $sidebar_id ] ) ? $wp_registered_sidebars[ $sidebar_id ]['name'] : null );
604    }
605
606    /**
607     * Sync addition of widgets to a sidebar.
608     *
609     * @access public
610     *
611     * @param array  $new_widgets New widgets.
612     * @param array  $old_widgets Old widgets.
613     * @param string $sidebar     Sidebar ID.
614     * @return array All widgets that have been moved to the sidebar.
615     */
616    public function sync_add_widgets_to_sidebar( $new_widgets, $old_widgets, $sidebar ) {
617        $added_widgets = array_diff( $new_widgets, $old_widgets );
618        if ( empty( $added_widgets ) ) {
619            return array();
620        }
621        $moved_to_sidebar = array();
622        $sidebar_name     = $this->get_sidebar_name( $sidebar );
623
624        // Don't sync jetpack_widget_added if theme was switched.
625        if ( $this->is_theme_switch() ) {
626            return array();
627        }
628
629        foreach ( $added_widgets as $added_widget ) {
630            $moved_to_sidebar[] = $added_widget;
631            $added_widget_name  = $this->get_widget_name( $added_widget );
632            /**
633             * Helps Sync log that a widget got added
634             *
635             * @since 1.6.3
636             * @since-jetpack 4.9.0
637             *
638             * @param string $sidebar, Sidebar id got changed
639             * @param string $added_widget, Widget id got added
640             * @param string $sidebar_name, Sidebar id got changed Since 5.0.0
641             * @param string $added_widget_name, Widget id got added Since 5.0.0
642             */
643            do_action( 'jetpack_widget_added', $sidebar, $added_widget, $sidebar_name, $added_widget_name );
644        }
645        return $moved_to_sidebar;
646    }
647
648    /**
649     * Sync removal of widgets from a sidebar.
650     *
651     * @access public
652     *
653     * @param array  $new_widgets      New widgets.
654     * @param array  $old_widgets      Old widgets.
655     * @param string $sidebar          Sidebar ID.
656     * @param array  $inactive_widgets Current inactive widgets.
657     * @return array All widgets that have been moved to inactive.
658     */
659    public function sync_remove_widgets_from_sidebar( $new_widgets, $old_widgets, $sidebar, $inactive_widgets ) {
660        $removed_widgets = array_diff( $old_widgets, $new_widgets );
661
662        if ( empty( $removed_widgets ) ) {
663            return array();
664        }
665
666        $moved_to_inactive = array();
667        $sidebar_name      = $this->get_sidebar_name( $sidebar );
668
669        foreach ( $removed_widgets as $removed_widget ) {
670            // Lets check if we didn't move the widget to in_active_widgets.
671            if ( isset( $inactive_widgets ) && ! in_array( $removed_widget, $inactive_widgets, true ) ) {
672                $removed_widget_name = $this->get_widget_name( $removed_widget );
673                /**
674                 * Helps Sync log that a widgte got removed
675                 *
676                 * @since 1.6.3
677                 * @since-jetpack 4.9.0
678                 *
679                 * @param string $sidebar, Sidebar id got changed
680                 * @param string $removed_widget, Widget id got removed
681                 * @param string $sidebar_name, Name of the sidebar that changed  Since 5.0.0
682                 * @param string $removed_widget_name, Name of the widget that got removed Since 5.0.0
683                 */
684                do_action( 'jetpack_widget_removed', $sidebar, $removed_widget, $sidebar_name, $removed_widget_name );
685            } else {
686                $moved_to_inactive[] = $removed_widget;
687            }
688        }
689        return $moved_to_inactive;
690    }
691
692    /**
693     * Sync a reorder of widgets within a sidebar.
694     *
695     * @access public
696     *
697     * @todo Refactor serialize() to a json_encode().
698     *
699     * @param array  $new_widgets New widgets.
700     * @param array  $old_widgets Old widgets.
701     * @param string $sidebar     Sidebar ID.
702     */
703    public function sync_widgets_reordered( $new_widgets, $old_widgets, $sidebar ) {
704        $added_widgets = array_diff( $new_widgets, $old_widgets );
705        if ( ! empty( $added_widgets ) ) {
706            return;
707        }
708        $removed_widgets = array_diff( $old_widgets, $new_widgets );
709        if ( ! empty( $removed_widgets ) ) {
710            return;
711        }
712
713        // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
714        if ( serialize( $old_widgets ) !== serialize( $new_widgets ) ) {
715            $sidebar_name = $this->get_sidebar_name( $sidebar );
716            /**
717             * Helps Sync log that a sidebar id got reordered
718             *
719             * @since 1.6.3
720             * @since-jetpack 4.9.0
721             *
722             * @param string $sidebar, Sidebar id got changed
723             * @param string $sidebar_name, Name of the sidebar that changed  Since 5.0.0
724             */
725            do_action( 'jetpack_widget_reordered', $sidebar, $sidebar_name );
726        }
727    }
728
729    /**
730     * Handle the update of the sidebars and widgets mapping option.
731     *
732     * @access public
733     *
734     * @param mixed $old_value The old option value.
735     * @param mixed $new_value The new option value.
736     */
737    public function sync_sidebar_widgets_actions( $old_value, $new_value ) {
738        // Don't really know how to deal with different array_values yet.
739        if (
740            ( isset( $old_value['array_version'] ) && 3 !== $old_value['array_version'] ) ||
741            ( isset( $new_value['array_version'] ) && 3 !== $new_value['array_version'] )
742        ) {
743            return;
744        }
745
746        $moved_to_inactive_ids = array();
747        $moved_to_sidebar      = array();
748        $new_inactive_widgets  = $new_value['wp_inactive_widgets'] ?? array();
749
750        foreach ( $new_value as $sidebar => $new_widgets ) {
751            if ( in_array( $sidebar, array( 'array_version', 'wp_inactive_widgets' ), true ) ) {
752                continue;
753            }
754            $old_widgets = isset( $old_value[ $sidebar ] )
755                ? $old_value[ $sidebar ]
756                : array();
757
758            if ( ! is_array( $new_widgets ) ) {
759                $new_widgets = array();
760            }
761            $moved_to_inactive_recently = $this->sync_remove_widgets_from_sidebar( $new_widgets, $old_widgets, $sidebar, $new_inactive_widgets );
762            $moved_to_inactive_ids      = array_merge( $moved_to_inactive_ids, $moved_to_inactive_recently );
763
764            $moved_to_sidebar_recently = $this->sync_add_widgets_to_sidebar( $new_widgets, $old_widgets, $sidebar );
765            $moved_to_sidebar          = array_merge( $moved_to_sidebar, $moved_to_sidebar_recently );
766
767            $this->sync_widgets_reordered( $new_widgets, $old_widgets, $sidebar );
768
769        }
770
771        // Don't sync either jetpack_widget_moved_to_inactive or jetpack_cleared_inactive_widgets if theme was switched.
772        if ( $this->is_theme_switch() ) {
773            return;
774        }
775
776        // Treat inactive sidebar a bit differently.
777        if ( ! empty( $moved_to_inactive_ids ) ) {
778            $moved_to_inactive_name = array_map( array( $this, 'get_widget_name' ), $moved_to_inactive_ids );
779            /**
780             * Helps Sync log that a widgets IDs got moved to in active
781             *
782             * @since 1.6.3
783             * @since-jetpack 4.9.0
784             *
785             * @param array $moved_to_inactive_ids, Array of widgets id that moved to inactive id got changed
786             * @param array $moved_to_inactive_names, Array of widgets names that moved to inactive id got changed Since 5.0.0
787             */
788            do_action( 'jetpack_widget_moved_to_inactive', $moved_to_inactive_ids, $moved_to_inactive_name );
789        } elseif ( empty( $moved_to_sidebar ) && empty( $new_value['wp_inactive_widgets'] ) && ! empty( $old_value['wp_inactive_widgets'] ) ) {
790            /**
791             * Helps Sync log that a got cleared from inactive.
792             *
793             * @since 1.6.3
794             * @since-jetpack 4.9.0
795             */
796            do_action( 'jetpack_cleared_inactive_widgets' );
797        }
798    }
799
800    /**
801     * Retrieve the theme data for the current or a specific theme.
802     *
803     * @access private
804     *
805     * @param \WP_Theme $theme Theme object. Optional, will default to the current theme.
806     *
807     * @return array Theme data.
808     */
809    private function get_theme_info( $theme = null ) {
810        $theme_support = array();
811
812        // We are trying to get the current theme info.
813        if ( null === $theme ) {
814            $theme = wp_get_theme();
815        }
816
817        $theme_support['name']    = $theme->get( 'Name' );
818        $theme_support['version'] = $theme->get( 'Version' );
819        $theme_support['slug']    = $theme->get_stylesheet();
820        $theme_support['uri']     = $theme->get( 'ThemeURI' );
821
822        return $theme_support;
823    }
824
825    /**
826     * Whether we've deleted a theme in the current request.
827     *
828     * @access private
829     *
830     * @return boolean True if this is a theme deletion request, false otherwise.
831     */
832    private function get_delete_theme_call() {
833        // Intentional usage of `debug_backtrace()` for production needs.
834        // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_debug_backtrace
835        $backtrace         = debug_backtrace();
836        $delete_theme_call = null;
837        foreach ( $backtrace as $call ) {
838            if ( isset( $call['function'] ) && 'delete_theme' === $call['function'] ) {
839                $delete_theme_call = $call;
840                break;
841            }
842        }
843        return $delete_theme_call;
844    }
845
846    /**
847     * Whether we've switched to another theme in the current request.
848     *
849     * @access private
850     *
851     * @return boolean True if this is a theme switch request, false otherwise.
852     */
853    private function is_theme_switch() {
854        return did_action( 'after_switch_theme' );
855    }
856
857    /**
858     * Return Total number of objects.
859     *
860     * @param array $config Full Sync config.
861     *
862     * @return int total
863     */
864    public function total( $config ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
865        return 1;
866    }
867
868    /**
869     * Retrieve a set of constants by their IDs.
870     *
871     * @access public
872     *
873     * @param string $object_type Object type.
874     * @param array  $ids         Object IDs.
875     * @return array Array of objects.
876     */
877    public function get_objects_by_id( $object_type, $ids ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
878        if ( 'theme-info' !== $object_type ) {
879            return array();
880        }
881
882        return array( $this->get_theme_info() );
883    }
884}