Open in github.dev
Open in a new github.dev tab
Open in codespace
Collapse file tree
Files
Search this repository(forward slash) forward slash/
tT
/
Copy pathkandy-mcp-acting-user.php
More file actions
More file actions
1643 lines (1471 loc) · 55.3 KB
/
Copy pathkandy-mcp-acting-user.php
File metadata and controls
1643 lines (1471 loc) · 55.3 KB
Open symbols panel
Edit and raw actions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
/**
* Plugin Name: Kandy MCP Acting User
* Description: Switches effective WP user based on signed gateway header. Provides the kandy-mcp/v1 REST namespace (SEO endpoint, self-update).
* Version: 2.1.0
* Author: Kadabra Innovation & Technology
*/
defined( 'ABSPATH' ) || exit;
define( 'KANDY_MCP_PLUGIN_VERSION', '2.1.0' );
add_action( 'init', function () {
// Kept for backward compatibility: lets core REST read the raw postmeta.
// Writes go through the kandy-mcp/v1/seo endpoint since v2.0.0.
$yoast_meta_keys = array(
'_yoast_wpseo_title',
'_yoast_wpseo_metadesc',
'_yoast_wpseo_focuskw',
'_yoast_wpseo_opengraph-title',
'_yoast_wpseo_opengraph-description',
);
foreach ( array( 'post', 'page' ) as $post_type ) {
foreach ( $yoast_meta_keys as $meta_key ) {
register_post_meta(
$post_type,
$meta_key,
array(
'show_in_rest' => true,
'single' => true,
'type' => 'string',
'auth_callback' => function ( $allowed, $meta_key, $post_id ) {
return current_user_can( 'edit_post', $post_id );
},
)
);
}
}
} );
/**
* Verify a Kandy gateway HMAC signature.
* Shared by the REST auth hook and the self-update endpoint.
*
* @param string $method HTTP method (upper-case).
* @param string $target Path + query string as signed by the gateway.
* @param string $acting_user Email of the acting user.
* @param string $timestamp Unix timestamp string from X-Kandy-Ts header.
* @param string $raw_body Raw request body (empty string if no body).
* @param string $signature Hex HMAC-SHA256 from X-Kandy-Sig header.
* @return bool|WP_Error True on success, WP_Error on failure.
*/
function kandy_mcp_verify_signature( $method, $target, $acting_user, $timestamp, $raw_body, $signature ) {
if ( ! defined( 'KANDY_MCP_SECRET' ) || ! KANDY_MCP_SECRET ) {
return new WP_Error(
'kandy_mcp_misconfigured',
'KANDY_MCP_SECRET not defined in wp-config.php',
array( 'status' => 500 )
);
}
if ( ! preg_match( '/^[0-9a-f]{64}$/i', $signature ) ) {
return new WP_Error(
'kandy_mcp_bad_sig',
'Acting-user signature malformed',
array( 'status' => 401 )
);
}
if ( ! ctype_digit( $timestamp ) || abs( time() - (int) $timestamp ) > 300 ) {
return new WP_Error(
'kandy_mcp_stale_sig',
'Acting-user signature timestamp is stale',
array( 'status' => 401 )
);
}
$body_sha = hash( 'sha256', $raw_body );
$canonical = $method . "\n" . $target . "\n" . $acting_user . "\n" . $timestamp . "\n" . $body_sha;
$expected = hash_hmac( 'sha256', $canonical, KANDY_MCP_SECRET );
if ( ! hash_equals( $expected, $signature ) ) {
return new WP_Error(
'kandy_mcp_bad_sig',
'Acting-user signature invalid',
array( 'status' => 401 )
);
}
return true;
}
/**
* Whether the current request carried a valid gateway HMAC signature.
* Set by the rest_authentication_errors hook below; consumed by the
* kandy-mcp/v1 permission callbacks.
*
* The permission callbacks must NOT re-verify against WP_REST_Request::get_route()
* — that returns "/kandy-mcp/v1/..." without the "/wp-json" prefix or trailing
* slash, which never matches the REQUEST_URI path the gateway signs. (v1.1.0's
* self-update permission check had exactly that bug.)
*
* @var bool
*/
$GLOBALS['kandy_mcp_request_verified'] = false;
function kandy_mcp_request_verified() {
return ! empty( $GLOBALS['kandy_mcp_request_verified'] );
}
add_action( 'rest_authentication_errors', function ( $result ) {
// Only act if the acting-user header is present and basic auth has already succeeded.
if ( ! empty( $result ) && is_wp_error( $result ) ) {
return $result;
}
$acting_user = isset( $_SERVER['HTTP_X_KANDY_ACTING_USER'] )
? sanitize_email( wp_unslash( $_SERVER['HTTP_X_KANDY_ACTING_USER'] ) )
: null;
$signature = isset( $_SERVER['HTTP_X_KANDY_SIG'] )
? sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_KANDY_SIG'] ) )
: null;
$timestamp = isset( $_SERVER['HTTP_X_KANDY_TS'] )
? sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_KANDY_TS'] ) )
: null;
if ( ! $acting_user || ! $signature || ! $timestamp ) {
return $result;
}
if ( ! is_user_logged_in() ) {
return new WP_Error(
'kandy_mcp_service_auth_required',
'WordPress service authentication required',
array( 'status' => 401 )
);
}
if ( ! is_email( $acting_user ) ) {
return new WP_Error(
'kandy_mcp_bad_user',
'Acting-user email is invalid',
array( 'status' => 400 )
);
}
// Canonical request: METHOD + "\n" + PATH_AND_QUERY + "\n" + ACTING_USER + "\n" + TIMESTAMP + "\n" + BODY_SHA256
// Must match exactly what src/lib/hmac.ts computes.
$raw_body = file_get_contents( 'php://input' );
$raw_body = $raw_body !== false ? $raw_body : '';
$request_uri = isset( $_SERVER['REQUEST_URI'] )
? wp_unslash( $_SERVER['REQUEST_URI'] )
: '';
$uri_path = wp_parse_url( $request_uri, PHP_URL_PATH );
$uri_query = wp_parse_url( $request_uri, PHP_URL_QUERY );
$target = $uri_path ? $uri_path : '';
if ( $uri_query ) {
$target .= '?' . $uri_query;
}
$method = isset( $_SERVER['REQUEST_METHOD'] )
? strtoupper( wp_unslash( $_SERVER['REQUEST_METHOD'] ) )
: 'GET';
$verify = kandy_mcp_verify_signature( $method, $target, $acting_user, $timestamp, $raw_body, $signature );
if ( is_wp_error( $verify ) ) {
return $verify;
}
$GLOBALS['kandy_mcp_request_verified'] = true;
// Emit plugin version so the gateway can track which sites need updates.
header( 'X-Kandy-Plugin-Version: ' . KANDY_MCP_PLUGIN_VERSION );
$user = get_user_by( 'email', $acting_user );
if ( ! $user ) {
// No local WP user for this email — stay as service user but log it.
// This is intentional: the gateway verified the user is allowed; the
// WP site just hasn't created a matching local account yet.
error_log( "[kandy-mcp] no local WP user for {$acting_user}; staying as service user" ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
return $result;
}
wp_set_current_user( $user->ID );
// The HMAC signature above proves this is an authenticated gateway request.
// Grant the capabilities the gateway's tools need so WordPress doesn't
// block the acting user solely because their WP role isn't admin:
// SEO meta editing (Yoast), site settings (/wp/v2/settings requires
// manage_options), widgets/menu locations (edit_theme_options).
// Gateway-level access control governs which users may call which tools.
add_filter( 'user_has_cap', function ( $allcaps ) {
$allcaps['wpseo_edit_advanced_metadata'] = true;
$allcaps['wpseo_manage_options'] = true;
$allcaps['manage_options'] = true;
$allcaps['edit_theme_options'] = true;
return $allcaps;
} );
return $result;
}, 99 );
/**
* Permission check for all kandy-mcp/v1 endpoints: the request must carry a
* valid gateway HMAC signature (verified once in rest_authentication_errors
* against the exact REQUEST_URI path the gateway signed).
*/
function kandy_mcp_rest_permission( WP_REST_Request $request ) {
if ( ! is_user_logged_in() ) {
return new WP_Error(
'kandy_mcp_service_auth_required',
'WordPress service authentication required',
array( 'status' => 401 )
);
}
if ( ! kandy_mcp_request_verified() ) {
return new WP_Error(
'kandy_mcp_missing_headers',
'Valid gateway authentication headers required',
array( 'status' => 401 )
);
}
return true;
}
// ── REST routes ────────────────────────────────────────────────────────────────
add_action( 'rest_api_init', function () {
register_rest_route(
'kandy-mcp/v1',
'/self-update',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_handle_self_update',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/seo/(?P<id>\d+)',
array(
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_seo_get',
'permission_callback' => 'kandy_mcp_rest_permission',
),
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_seo_update',
'permission_callback' => 'kandy_mcp_rest_permission',
),
)
);
// Site-control endpoints (v2.1.0): capabilities core REST has no write
// surface for. GET/POST pairs so the gateway can verify every write.
$site_control = array(
'/site-control/menu-locations' => array( 'kandy_mcp_menu_locations_get', 'kandy_mcp_menu_locations_set' ),
'/site-control/permalinks' => array( 'kandy_mcp_permalinks_get', 'kandy_mcp_permalinks_set' ),
'/site-control/search-visibility' => array( 'kandy_mcp_search_visibility_get', 'kandy_mcp_search_visibility_set' ),
'/site-control/theme-mods' => array( 'kandy_mcp_theme_mods_get', 'kandy_mcp_theme_mods_set' ),
'/site-control/robots-txt' => array( 'kandy_mcp_robots_txt_get', 'kandy_mcp_robots_txt_set' ),
);
foreach ( $site_control as $route => $callbacks ) {
register_rest_route(
'kandy-mcp/v1',
$route,
array(
array(
'methods' => 'GET',
'callback' => $callbacks[0],
'permission_callback' => 'kandy_mcp_rest_permission',
),
array(
'methods' => 'POST',
'callback' => $callbacks[1],
'permission_callback' => 'kandy_mcp_rest_permission',
),
)
);
}
register_rest_route(
'kandy-mcp/v1',
'/site-control/site-url',
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_site_url_get',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/site-control/site-url/https-upgrade',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_site_url_https_upgrade',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/site-control/cache-purge',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_cache_purge',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/languages',
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_languages_get',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/languages/post/(?P<id>\d+)',
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_post_translations_get',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/languages/post/(?P<id>\d+)/set-language',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_post_language_set',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/languages/link',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_translations_link',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/yoast/site-options',
array(
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_yoast_options_get',
'permission_callback' => 'kandy_mcp_rest_permission',
),
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_yoast_options_set',
'permission_callback' => 'kandy_mcp_rest_permission',
),
)
);
register_rest_route(
'kandy-mcp/v1',
'/yoast/flush-sitemap-cache',
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_yoast_flush_sitemap_cache',
'permission_callback' => 'kandy_mcp_rest_permission',
)
);
register_rest_route(
'kandy-mcp/v1',
'/site-control/option/(?P<name>[A-Za-z0-9_.\-]+)',
array(
array(
'methods' => 'GET',
'callback' => 'kandy_mcp_option_get',
'permission_callback' => 'kandy_mcp_rest_permission',
),
array(
'methods' => 'POST',
'callback' => 'kandy_mcp_option_set',
'permission_callback' => 'kandy_mcp_rest_permission',
),
)
);
} );
// ── SEO endpoint ───────────────────────────────────────────────────────────────
//
// Writes go through the SEO plugin's own storage layer (WPSEO_Meta for Yoast,
// postmeta for Rank Math), never through core REST meta: core REST silently
// drops unregistered keys, and it writes meta *after* the save hooks Yoast
// uses to rebuild its indexables, so the rendered <head> would stay stale.
function kandy_mcp_yoast_active() {
return class_exists( 'WPSEO_Meta' );
}
function kandy_mcp_rank_math_active() {
return class_exists( 'RankMath' ) || defined( 'RANK_MATH_VERSION' );
}
/**
* Canonical field map shared with the gateway (src/sites/seo-meta.ts).
* Keys are the wire names; values are the per-plugin storage keys
* (Yoast key is passed to WPSEO_Meta::set_value/get_value without the
* `_yoast_wpseo_` prefix; Rank Math key is a raw postmeta key).
* `noindex` and `nofollow` are handled specially below.
*/
function kandy_mcp_seo_field_map() {
return array(
'title' => array( 'yoast' => 'title', 'rank_math' => 'rank_math_title' ),
'metadesc' => array( 'yoast' => 'metadesc', 'rank_math' => 'rank_math_description' ),
'focuskw' => array( 'yoast' => 'focuskw', 'rank_math' => 'rank_math_focus_keyword' ),
'canonical' => array( 'yoast' => 'canonical', 'rank_math' => 'rank_math_canonical_url' ),
'og_title' => array( 'yoast' => 'opengraph-title', 'rank_math' => 'rank_math_facebook_title' ),
'og_description' => array( 'yoast' => 'opengraph-description', 'rank_math' => 'rank_math_facebook_description' ),
'og_image' => array( 'yoast' => 'opengraph-image', 'rank_math' => 'rank_math_facebook_image' ),
'twitter_title' => array( 'yoast' => 'twitter-title', 'rank_math' => 'rank_math_twitter_title' ),
'twitter_description' => array( 'yoast' => 'twitter-description', 'rank_math' => 'rank_math_twitter_description' ),
'breadcrumb_title' => array( 'yoast' => 'bctitle', 'rank_math' => 'rank_math_breadcrumb_title' ),
'schema_page_type' => array( 'yoast' => 'schema_page_type', 'rank_math' => null ),
'schema_article_type' => array( 'yoast' => 'schema_article_type', 'rank_math' => null ),
);
}
/**
* Read the stored (editable) SEO values for one plugin, in wire-field form.
*
* @param int $post_id Post ID.
* @param string $plugin 'yoast' | 'rank_math'.
* @return array<string, mixed>
*/
function kandy_mcp_seo_read_stored( $post_id, $plugin ) {
$stored = array();
foreach ( kandy_mcp_seo_field_map() as $field => $keys ) {
$key = $keys[ $plugin ];
if ( null === $key ) {
continue;
}
if ( 'yoast' === $plugin ) {
$stored[ $field ] = WPSEO_Meta::get_value( $key, $post_id );
} else {
$value = get_post_meta( $post_id, $key, true );
$stored[ $field ] = is_string( $value ) ? $value : ( '' === $value ? '' : $value );
}
}
if ( 'yoast' === $plugin ) {
$noindex = WPSEO_Meta::get_value( 'meta-robots-noindex', $post_id );
$stored['noindex'] = '1' === (string) $noindex ? 'noindex' : ( '2' === (string) $noindex ? 'index' : 'default' );
$nofollow = WPSEO_Meta::get_value( 'meta-robots-nofollow', $post_id );
$stored['nofollow'] = '1' === (string) $nofollow;
} else {
$robots = get_post_meta( $post_id, 'rank_math_robots', true );
$robots = is_array( $robots ) ? $robots : array();
$stored['noindex'] = in_array( 'noindex', $robots, true ) ? 'noindex' : ( in_array( 'index', $robots, true ) ? 'index' : 'default' );
$stored['nofollow'] = in_array( 'nofollow', $robots, true );
}
return $stored;
}
/**
* Best-effort read of one property off Yoast's Meta surface object.
*
* @param object $meta Meta surface object.
* @param string|array $names Property name(s) to try in order.
* @return mixed|null
*/
function kandy_mcp_meta_prop( $meta, $names ) {
foreach ( (array) $names as $name ) {
try {
$value = $meta->$name;
if ( null !== $value && '' !== $value ) {
return $value;
}
} catch ( Throwable $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch
// Property not supported by this Yoast version — try the next name.
}
}
return null;
}
/**
* The *effective* head values Yoast will actually render for this post,
* including Search Appearance template fallbacks — so a page whose SEO title
* comes from a template no longer reads as "null".
*
* @param int $post_id Post ID.
* @return array|null
*/
function kandy_mcp_seo_effective( $post_id ) {
if ( ! function_exists( 'YoastSEO' ) ) {
return null;
}
try {
$meta = YoastSEO()->meta->for_post( $post_id );
if ( ! $meta ) {
return null;
}
$og_image = null;
$og_images = kandy_mcp_meta_prop( $meta, 'open_graph_images' );
if ( is_array( $og_images ) ) {
$first = reset( $og_images );
if ( is_array( $first ) && ! empty( $first['url'] ) ) {
$og_image = $first['url'];
}
}
return array(
'title' => kandy_mcp_meta_prop( $meta, 'title' ),
'description' => kandy_mcp_meta_prop( $meta, array( 'meta_description', 'description' ) ),
'canonical' => kandy_mcp_meta_prop( $meta, 'canonical' ),
'robots' => kandy_mcp_meta_prop( $meta, 'robots' ),
'og_title' => kandy_mcp_meta_prop( $meta, 'open_graph_title' ),
'og_description' => kandy_mcp_meta_prop( $meta, 'open_graph_description' ),
'og_image' => $og_image,
'twitter_title' => kandy_mcp_meta_prop( $meta, 'twitter_title' ),
'twitter_description' => kandy_mcp_meta_prop( $meta, 'twitter_description' ),
'breadcrumb_title' => kandy_mcp_meta_prop( $meta, 'breadcrumb_title' ),
);
} catch ( Throwable $e ) {
return array( 'error' => $e->getMessage() );
}
}
/**
* Rebuild (or at minimum invalidate) the Yoast indexable for a post so the
* rendered <head> reflects the values just written, instead of waiting for
* some later save to refresh it.
*
* @param int $post_id Post ID.
* @return string Status: rebuilt | invalidated | unavailable | yoast_inactive | error:<msg>
*/
function kandy_mcp_rebuild_indexable( $post_id ) {
if ( ! function_exists( 'YoastSEO' ) ) {
return 'yoast_inactive';
}
try {
$classes = YoastSEO()->classes;
$builder = $classes->get( 'Yoast\WP\SEO\Builders\Indexable_Builder' );
if ( $builder && method_exists( $builder, 'build_for_id_and_type' ) ) {
$builder->build_for_id_and_type( $post_id, 'post' );
return 'rebuilt';
}
// Fallback for Yoast versions without build_for_id_and_type: delete the
// indexable row so Yoast lazily rebuilds it on the next front-end request.
$repository = $classes->get( 'Yoast\WP\SEO\Repositories\Indexable_Repository' );
if ( $repository ) {
$indexable = $repository->find_by_id_and_type( $post_id, 'post', false );
if ( $indexable && method_exists( $indexable, 'delete' ) ) {
$indexable->delete();
return 'invalidated';
}
}
return 'unavailable';
} catch ( Throwable $e ) {
return 'error: ' . $e->getMessage();
}
}
/**
* Apply noindex/nofollow to Rank Math's robots array meta.
*
* @param int $post_id Post ID.
* @param string|null $noindex 'default' | 'noindex' | 'index' | null (leave unchanged).
* @param bool|null $nofollow true/false | null (leave unchanged).
*/
function kandy_mcp_rank_math_set_robots( $post_id, $noindex, $nofollow ) {
$robots = get_post_meta( $post_id, 'rank_math_robots', true );
$robots = is_array( $robots ) ? $robots : array();
if ( null !== $noindex ) {
$robots = array_diff( $robots, array( 'index', 'noindex' ) );
if ( 'noindex' === $noindex ) {
$robots[] = 'noindex';
} elseif ( 'index' === $noindex ) {
$robots[] = 'index';
}
}
if ( null !== $nofollow ) {
$robots = array_diff( $robots, array( 'nofollow' ) );
if ( $nofollow ) {
$robots[] = 'nofollow';
}
}
update_post_meta( $post_id, 'rank_math_robots', array_values( array_unique( $robots ) ) );
}
/**
* Build the common response body for GET and POST.
*/
function kandy_mcp_seo_response_base( $post ) {
$yoast_active = kandy_mcp_yoast_active();
$rank_math_active = kandy_mcp_rank_math_active();
return array(
'ok' => true,
'post_id' => $post->ID,
'post_type' => $post->post_type,
'plugin_version' => KANDY_MCP_PLUGIN_VERSION,
'yoast_active' => $yoast_active,
'rank_math_active' => $rank_math_active,
'stored' => array(
'yoast' => $yoast_active ? kandy_mcp_seo_read_stored( $post->ID, 'yoast' ) : null,
'rank_math' => $rank_math_active ? kandy_mcp_seo_read_stored( $post->ID, 'rank_math' ) : null,
),
'effective' => $yoast_active ? kandy_mcp_seo_effective( $post->ID ) : null,
);
}
function kandy_mcp_seo_load_post( WP_REST_Request $request ) {
$post_id = (int) $request['id'];
$post = get_post( $post_id );
if ( ! $post ) {
return new WP_Error(
'kandy_mcp_post_not_found',
"Post {$post_id} not found",
array( 'status' => 404 )
);
}
if ( ! current_user_can( 'edit_post', $post->ID ) ) {
return new WP_Error(
'kandy_mcp_forbidden',
'Acting user cannot edit this post',
array( 'status' => 403 )
);
}
return $post;
}
function kandy_mcp_seo_get( WP_REST_Request $request ) {
$post = kandy_mcp_seo_load_post( $request );
if ( is_wp_error( $post ) ) {
return $post;
}
return rest_ensure_response( kandy_mcp_seo_response_base( $post ) );
}
/**
* POST /kandy-mcp/v1/seo/<id>
*
* Body: {
* "fields": { <wire field>: <value>, ... } // applied to every active SEO plugin
* "yoast_fields": { ... } // applied only if Yoast is active
* "rank_math_fields": { ... } // applied only if Rank Math is active
* }
*
* Values are strings, except `nofollow` (bool) and `noindex`
* ('default' | 'noindex' | 'index'). Empty string clears a field.
* The response echoes back the freshly re-read stored values so the gateway
* can verify the write actually persisted.
*/
function kandy_mcp_seo_update( WP_REST_Request $request ) {
$post = kandy_mcp_seo_load_post( $request );
if ( is_wp_error( $post ) ) {
return $post;
}
$body = $request->get_json_params();
if ( ! is_array( $body ) ) {
return new WP_Error(
'kandy_mcp_bad_request',
'Request body must be a JSON object',
array( 'status' => 400 )
);
}
$groups = array();
foreach ( array( 'fields', 'yoast_fields', 'rank_math_fields' ) as $group ) {
$groups[ $group ] = isset( $body[ $group ] ) && is_array( $body[ $group ] ) ? $body[ $group ] : array();
}
if ( ! $groups['fields'] && ! $groups['yoast_fields'] && ! $groups['rank_math_fields'] ) {
return new WP_Error(
'kandy_mcp_bad_request',
'No SEO fields supplied',
array( 'status' => 400 )
);
}
$yoast_active = kandy_mcp_yoast_active();
$rank_math_active = kandy_mcp_rank_math_active();
if ( ! $yoast_active && ! $rank_math_active ) {
return new WP_Error(
'kandy_mcp_no_seo_plugin',
'Neither Yoast SEO nor Rank Math is active on this site',
array( 'status' => 422 )
);
}
$field_map = kandy_mcp_seo_field_map();
$special = array( 'noindex', 'nofollow' );
// Validate every supplied field before writing anything.
foreach ( $groups as $group => $fields ) {
foreach ( $fields as $field => $value ) {
if ( ! isset( $field_map[ $field ] ) && ! in_array( $field, $special, true ) ) {
return new WP_Error(
'kandy_mcp_bad_request',
"Unknown SEO field '{$field}' in {$group}",
array( 'status' => 400 )
);
}
if ( 'nofollow' === $field ) {
if ( ! is_bool( $value ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "'nofollow' must be a boolean", array( 'status' => 400 ) );
}
} elseif ( 'noindex' === $field ) {
if ( ! in_array( $value, array( 'default', 'noindex', 'index' ), true ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "'noindex' must be one of default|noindex|index", array( 'status' => 400 ) );
}
} elseif ( ! is_string( $value ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "'{$field}' must be a string", array( 'status' => 400 ) );
}
}
}
$written = array(
'yoast' => array(),
'rank_math' => array(),
);
$skipped = array();
$plugin_targets = array(
'yoast' => array( 'active' => $yoast_active, 'own_group' => 'yoast_fields' ),
'rank_math' => array( 'active' => $rank_math_active, 'own_group' => 'rank_math_fields' ),
);
foreach ( $plugin_targets as $plugin => $target ) {
// Plugin-specific group first, shared `fields` on top of it only where
// not already set (explicit per-plugin values win).
$merged = array_merge( $groups['fields'], $groups[ $target['own_group'] ] );
if ( ! $merged ) {
continue;
}
if ( ! $target['active'] ) {
// Shared fields silently go to whichever plugin *is* active; only
// explicitly targeted fields are worth reporting as skipped.
foreach ( array_keys( $groups[ $target['own_group'] ] ) as $field ) {
$skipped[] = array(
'field' => $field,
'target' => $plugin,
'reason' => $plugin . '_inactive',
);
}
continue;
}
$noindex = array_key_exists( 'noindex', $merged ) ? $merged['noindex'] : null;
$nofollow = array_key_exists( 'nofollow', $merged ) ? $merged['nofollow'] : null;
unset( $merged['noindex'], $merged['nofollow'] );
foreach ( $merged as $field => $value ) {
$key = $field_map[ $field ][ $plugin ];
if ( null === $key ) {
$skipped[] = array(
'field' => $field,
'target' => $plugin,
'reason' => 'unsupported_by_' . $plugin,
);
continue;
}
if ( 'yoast' === $plugin ) {
// Yoast's own storage layer: per-field sanitization included.
WPSEO_Meta::set_value( $key, $value, $post->ID );
} else {
$sanitized = in_array( $field, array( 'canonical', 'og_image' ), true )
? esc_url_raw( $value )
: sanitize_text_field( $value );
if ( '' === $sanitized ) {
delete_post_meta( $post->ID, $key );
} else {
update_post_meta( $post->ID, $key, $sanitized );
}
// Rank Math shows Facebook values on Twitter unless told otherwise.
if ( in_array( $field, array( 'twitter_title', 'twitter_description' ), true ) ) {
update_post_meta( $post->ID, 'rank_math_twitter_use_facebook', 'off' );
}
}
$written[ $plugin ][] = $field;
}
if ( null !== $noindex || null !== $nofollow ) {
if ( 'yoast' === $plugin ) {
if ( null !== $noindex ) {
$yoast_noindex = 'noindex' === $noindex ? '1' : ( 'index' === $noindex ? '2' : '0' );
WPSEO_Meta::set_value( 'meta-robots-noindex', $yoast_noindex, $post->ID );
$written['yoast'][] = 'noindex';
}
if ( null !== $nofollow ) {
WPSEO_Meta::set_value( 'meta-robots-nofollow', $nofollow ? '1' : '0', $post->ID );
$written['yoast'][] = 'nofollow';
}
} else {
kandy_mcp_rank_math_set_robots( $post->ID, $noindex, $nofollow );
if ( null !== $noindex ) {
$written['rank_math'][] = 'noindex';
}
if ( null !== $nofollow ) {
$written['rank_math'][] = 'nofollow';
}
}
}
}
$indexable_status = null;
if ( $written['yoast'] ) {
$indexable_status = kandy_mcp_rebuild_indexable( $post->ID );
}
$response = kandy_mcp_seo_response_base( $post );
$response['written'] = $written;
$response['skipped'] = $skipped;
$response['indexable'] = $indexable_status;
return rest_ensure_response( $response );
}
// ── Site-control endpoints ─────────────────────────────────────────────────────
/** Menu theme-locations: core REST exposes /menu-locations read-only. */
function kandy_mcp_menu_locations_get() {
$registered = get_registered_nav_menus();
$assigned = get_nav_menu_locations();
$menus = array();
foreach ( wp_get_nav_menus() as $menu ) {
$menus[] = array( 'id' => $menu->term_id, 'name' => $menu->name, 'slug' => $menu->slug );
}
$locations = array();
foreach ( $registered as $location => $description ) {
$locations[ $location ] = array(
'description' => $description,
'menu_id' => isset( $assigned[ $location ] ) ? (int) $assigned[ $location ] : 0,
);
}
return rest_ensure_response( array( 'ok' => true, 'locations' => $locations, 'menus' => $menus ) );
}
function kandy_mcp_menu_locations_set( WP_REST_Request $request ) {
$body = $request->get_json_params();
$requested = isset( $body['locations'] ) && is_array( $body['locations'] ) ? $body['locations'] : null;
if ( ! $requested ) {
return new WP_Error( 'kandy_mcp_bad_request', 'Body must include locations: { <location>: <menu_id|0> }', array( 'status' => 400 ) );
}
$registered = get_registered_nav_menus();
foreach ( $requested as $location => $menu_id ) {
if ( ! isset( $registered[ $location ] ) ) {
return new WP_Error( 'kandy_mcp_unknown_location', "Theme location '{$location}' is not registered by the active theme", array( 'status' => 422 ) );
}
if ( ! is_int( $menu_id ) && ! ctype_digit( (string) $menu_id ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "menu_id for '{$location}' must be an integer (0 unassigns)", array( 'status' => 400 ) );
}
if ( (int) $menu_id !== 0 && ! wp_get_nav_menu_object( (int) $menu_id ) ) {
return new WP_Error( 'kandy_mcp_unknown_menu', "Menu {$menu_id} does not exist", array( 'status' => 422 ) );
}
}
$assigned = get_nav_menu_locations();
foreach ( $requested as $location => $menu_id ) {
if ( 0 === (int) $menu_id ) {
unset( $assigned[ $location ] );
} else {
$assigned[ $location ] = (int) $menu_id;
}
}
set_theme_mod( 'nav_menu_locations', $assigned );
return kandy_mcp_menu_locations_get();
}
/** Permalink structure. */
function kandy_mcp_permalinks_get() {
return rest_ensure_response(
array(
'ok' => true,
'structure' => (string) get_option( 'permalink_structure' ),
)
);
}
function kandy_mcp_permalinks_set( WP_REST_Request $request ) {
$body = $request->get_json_params();
if ( ! is_array( $body ) || ! array_key_exists( 'structure', $body ) || ! is_string( $body['structure'] ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "Body must include structure (string; '' = plain)", array( 'status' => 400 ) );
}
$structure = trim( $body['structure'] );
if ( '' !== $structure && ! preg_match( '#^/[A-Za-z0-9%_/.\-]*$#', $structure ) ) {
return new WP_Error( 'kandy_mcp_bad_request', "structure must be '' or start with '/' and contain only letters, digits, %tags%, '/', '-', '_', '.'", array( 'status' => 400 ) );
}
$old = (string) get_option( 'permalink_structure' );
update_option( 'permalink_structure', $structure );
flush_rewrite_rules();
return rest_ensure_response( array( 'ok' => true, 'old_structure' => $old, 'structure' => $structure ) );
}
/** Site URL: read both URLs; the only supported write is the http→https flip. */
function kandy_mcp_site_url_get() {
$home = (string) get_option( 'home' );
$siteurl = (string) get_option( 'siteurl' );
return rest_ensure_response(
array(
'ok' => true,
'home' => $home,
'siteurl' => $siteurl,
'https' => 0 === strpos( $home, 'https://' ) && 0 === strpos( $siteurl, 'https://' ),
)
);
}
function kandy_mcp_site_url_https_upgrade() {
$old_home = (string) get_option( 'home' );
$old_siteurl = (string) get_option( 'siteurl' );
if ( 0 === strpos( $old_home, 'https://' ) && 0 === strpos( $old_siteurl, 'https://' ) ) {
return rest_ensure_response(
array( 'ok' => true, 'already_https' => true, 'home' => $old_home, 'siteurl' => $old_siteurl )
);
}
// Scheme flip only — host and path are never changed by this endpoint.
$new_home = set_url_scheme( $old_home, 'https' );
$new_siteurl = set_url_scheme( $old_siteurl, 'https' );
update_option( 'home', $new_home );
update_option( 'siteurl', $new_siteurl );
return rest_ensure_response(
array(
'ok' => true,
'already_https' => false,
'old_home' => $old_home,
'old_siteurl' => $old_siteurl,
'home' => $new_home,
'siteurl' => $new_siteurl,
)
);
}
/** Search-engine visibility (the "Discourage search engines" toggle). */
function kandy_mcp_search_visibility_get() {
return rest_ensure_response(
array( 'ok' => true, 'visible_to_search_engines' => '1' === (string) get_option( 'blog_public', '1' ) )
);
}
function kandy_mcp_search_visibility_set( WP_REST_Request $request ) {
$body = $request->get_json_params();
if ( ! is_array( $body ) || ! array_key_exists( 'visible', $body ) || ! is_bool( $body['visible'] ) ) {
return new WP_Error( 'kandy_mcp_bad_request', 'Body must include visible (boolean)', array( 'status' => 400 ) );
}
update_option( 'blog_public', $body['visible'] ? '1' : '0' );
return kandy_mcp_search_visibility_get();
}
/** Theme mods: site logo (theme mod) + site icon (option) + read-only mod list. */
function kandy_mcp_theme_mods_get() {
$mods = get_theme_mods();
$logo_id = (int) get_theme_mod( 'custom_logo', 0 );
$icon_id = (int) get_option( 'site_icon', 0 );
return rest_ensure_response(
array(
'ok' => true,
'theme' => get_stylesheet(),
'custom_logo' => $logo_id,
'custom_logo_url' => $logo_id ? ( wp_get_attachment_url( $logo_id ) ?: null ) : null,
'site_icon' => $icon_id,
'site_icon_url' => $icon_id ? ( wp_get_attachment_url( $icon_id ) ?: null ) : null,
'mod_keys' => is_array( $mods ) ? array_values( array_map( 'strval', array_keys( $mods ) ) ) : array(),
)
);
}
function kandy_mcp_theme_mods_set( WP_REST_Request $request ) {
$body = $request->get_json_params();