PluginProbe
xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN / 1.3.6
xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN v1.3.6
1.3.6 1.3.5 1.3.4 1.3.3 1.3.2 1.3.1 1.3.0 1.2.4 trunk 1.0.0 1.0.1 1.0.2 1.0.3 1.0.4 1.0.5 1.0.6 1.0.7 1.0.8 1.0.9 1.1.0 1.1.1 1.1.2 1.1.3 1.1.4 1.1.5 All 32 releases
xspeed / includes / class-migration.php

class-migration.php in xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN 1.3.6, at includes/class-migration.php

1,560 lines 63.8 KB
No matching file
Up and down to move Enter to open Esc to close
Raw Download Zip
1 <?php
2 /**
3 * Migration — read settings from other popular caching plugins and
4 * translate them into xSpeed equivalents.
5 *
6 * Each source plugin has its own importer that returns a single
7 * normalized patch shape:
8 *
9 * array<string,array> // module-slug → settings patch
10 *
11 * which feeds straight into update_option('xspeed_module_<slug>')
12 * via the same write path the Recommendations module uses.
13 *
14 * Importers are pure: detect() reads the options table, returns
15 * what it found (or null if the source plugin's options aren't
16 * present). plan() turns that raw read into the patch. apply()
17 * writes it. preview() returns plan() without writing — used by
18 * the React panel for the "what would import" diff view.
19 *
20 * Adding a new source = adding a private detect_*() + plan_*()
21 * pair, then wiring them in `sources()`.
22 *
23 * @package XSpeed
24 */
25
26 declare(strict_types=1);
27
28 namespace XSpeed;
29
30 defined( 'ABSPATH' ) || exit;
31
32 final class Migration {
33
34 /**
35 * Public list of source plugins with metadata for the UI:
36 * [ id => [ label, detect_cb, plan_cb ] ]
37 */
38 public static function sources(): array {
39 return array(
40 'wp-rocket' => array(
41 'label' => 'WP Rocket',
42 'detect' => array( __CLASS__, 'detect_wp_rocket' ),
43 'plan' => array( __CLASS__, 'plan_wp_rocket' ),
44 ),
45 'w3-total-cache' => array(
46 'label' => 'W3 Total Cache',
47 'detect' => array( __CLASS__, 'detect_w3tc' ),
48 'plan' => array( __CLASS__, 'plan_w3tc' ),
49 ),
50 'wp-super-cache' => array(
51 'label' => 'WP Super Cache',
52 'detect' => array( __CLASS__, 'detect_wpsc' ),
53 'plan' => array( __CLASS__, 'plan_wpsc' ),
54 ),
55 'litespeed-cache' => array(
56 'label' => 'LiteSpeed Cache',
57 'detect' => array( __CLASS__, 'detect_litespeed' ),
58 'plan' => array( __CLASS__, 'plan_litespeed' ),
59 ),
60 );
61 }
62
63 /** Site option holding the list of source ids already imported. */
64 private const IMPORTED_OPTION = 'xspeed_migration_imported';
65
66 /**
67 * Source id → plugin file. The ONE home for this map.
68 *
69 * Public because MigrationModule needs the same mapping to deactivate a
70 * source, and it used to keep a private copy. The two were identical, but
71 * a drift would have been silent and destructive: this map drives the
72 * `active` flag that decides whether the panel shows its confirmation, and
73 * the module's copy drove the actual deactivation. Diverge them and
74 * status() reports active:false, the panel skips the confirm, and the
75 * plugin is deactivated anyway — a genuinely silent deactivation, one edit
76 * away. (#189)
77 */
78 public const PLUGIN_FILE = array(
79 'wp-rocket' => 'wp-rocket/wp-rocket.php',
80 'w3-total-cache' => 'w3-total-cache/w3-total-cache.php',
81 'wp-super-cache' => 'wp-super-cache/wp-cache.php',
82 'litespeed-cache' => 'litespeed-cache/litespeed-cache.php',
83 );
84
85 /** The plugin file for a source id, or '' when the id is unknown. */
86 public static function plugin_file( string $source ): string {
87 return self::PLUGIN_FILE[ $source ] ?? '';
88 }
89
90 /**
91 * Site option recording a source that was imported but LEFT RUNNING.
92 *
93 * Holds `{ id, label }` for the last such import, or is absent. Not a
94 * history — the risk is "a second page cache is live right now", which is
95 * a single present-tense fact, not a log. (#189 AC4)
96 */
97 private const ACTIVE_SOURCE_OPTION = 'xspeed_migration_source_active';
98
99 /**
100 * Remember that an import finished with the source plugin still on, so the
101 * warning can outlive the import screen.
102 *
103 * Self-clearing rather than sticky: it stores only while the plugin is
104 * genuinely still active, and drops the record as soon as it is not. A
105 * user who deactivates the old plugin by hand from the Plugins screen
106 * never told us — so a stored flag we only cleared on OUR own deactivation
107 * path would nag forever about a plugin that is already off.
108 *
109 * @param string $source Source id.
110 * @param string $label Human label for the source.
111 */
112 public static function remember_active_source( string $source, string $label ): void {
113 $file = self::plugin_file( $source );
114 if ( '' === $file ) {
115 return;
116 }
117
118 require_once ABSPATH . 'wp-admin/includes/plugin.php';
119 if ( ! is_plugin_active( $file ) ) {
120 self::forget_active_source( $source );
121 return;
122 }
123
124 update_option(
125 self::ACTIVE_SOURCE_OPTION,
126 array(
127 'id' => $source,
128 'label' => '' !== $label ? $label : $source,
129 )
130 );
131 }
132
133 /** Drop the record — the source is off, or was never on. */
134 public static function forget_active_source( string $source = '' ): void {
135 if ( '' !== $source ) {
136 $stored = get_option( self::ACTIVE_SOURCE_OPTION, array() );
137 if ( is_array( $stored ) && ( $stored['id'] ?? '' ) !== $source ) {
138 return;
139 }
140 }
141 delete_option( self::ACTIVE_SOURCE_OPTION );
142 }
143
144 /**
145 * The imported-but-still-running source, or null.
146 *
147 * Re-checks the plugin's live state on every read, so the warning
148 * disappears by itself the moment the user deactivates the plugin —
149 * whether they did it through us or from the Plugins screen.
150 *
151 * @return array{id:string,label:string}|null
152 */
153 public static function pending_source(): ?array {
154 $stored = get_option( self::ACTIVE_SOURCE_OPTION, array() );
155 if ( ! is_array( $stored ) || empty( $stored['id'] ) ) {
156 return null;
157 }
158
159 $file = self::plugin_file( (string) $stored['id'] );
160 if ( '' === $file ) {
161 return null;
162 }
163
164 require_once ABSPATH . 'wp-admin/includes/plugin.php';
165 if ( ! is_plugin_active( $file ) ) {
166 // Resolved itself — stop warning, and stop re-checking.
167 delete_option( self::ACTIVE_SOURCE_OPTION );
168 return null;
169 }
170
171 return array(
172 'id' => (string) $stored['id'],
173 'label' => (string) ( $stored['label'] ?? $stored['id'] ),
174 );
175 }
176
177 /** Record a source as imported (idempotent). */
178 public static function mark_imported( string $id ): void {
179 $done = (array) get_option( self::IMPORTED_OPTION, array() );
180 if ( ! in_array( $id, $done, true ) ) {
181 $done[] = $id;
182 update_option( self::IMPORTED_OPTION, array_values( $done ) );
183 }
184 }
185
186 /**
187 * For each source, return { id, label, detected, value_count, mapped_count,
188 * imported, active }.
189 * - `detected` true when the source plugin's settings are present.
190 * - `value_count` raw number of keys in the source's own config — NOT
191 * how many we import; kept for diagnostics only.
192 * - `mapped_count` how many settings the importer ACTUALLY writes into
193 * xSpeed (the honest number to show users).
194 * - `imported` true once this source has been imported (so the panel
195 * shows it as done, not as a fresh Import target).
196 * - `active` whether the source plugin is still active.
197 */
198 public static function status(): array {
199 $imported = (array) get_option( self::IMPORTED_OPTION, array() );
200 if ( ! function_exists( 'is_plugin_active' ) ) {
201 require_once ABSPATH . 'wp-admin/includes/plugin.php';
202 }
203 $out = array();
204 foreach ( self::sources() as $id => $spec ) {
205 $raw = call_user_func( $spec['detect'] );
206 $detected = is_array( $raw );
207 $mapped = 0;
208 if ( $detected ) {
209 $patch = call_user_func( $spec['plan'], $raw );
210 if ( is_array( $patch ) ) {
211 $mapped = self::count_meaningful( $patch );
212 }
213 }
214 $file = self::PLUGIN_FILE[ $id ] ?? '';
215 $out[] = array(
216 'id' => $id,
217 'label' => $spec['label'],
218 'detected' => $detected,
219 'value_count' => $detected ? count( $raw ) : 0,
220 'mapped_count' => $mapped,
221 'imported' => in_array( $id, $imported, true ),
222 'active' => '' !== $file && is_plugin_active( $file ),
223 );
224 }
225 return $out;
226 }
227
228 /**
229 * Count the settings in a plan patch that will MEANINGFULLY change the
230 * config — i.e. the ones actually enabled / non-empty in the source.
231 *
232 * A `plan_*` patch always emits every mapped field, including the ones the
233 * source has turned OFF (`false`) or left empty. Counting those inflated
234 * the "settings available to migrate" number — a source with 2 settings on
235 * still reported ~12 because the importer listed every false mapping.
236 * Disabled (`false`) booleans and empty arrays/strings/zeros contribute
237 * nothing on import, so they're excluded from the count. (FBS-82449)
238 *
239 * @param array<string,mixed> $patch Plan patch (module slug => values).
240 * @return int Number of enabled / non-empty settings.
241 */
242 private static function count_meaningful( array $patch ): int {
243 $count = 0;
244 foreach ( $patch as $vals ) {
245 if ( is_array( $vals ) ) {
246 $count += count( self::meaningful_values( $vals ) );
247 }
248 }
249 return $count;
250 }
251
252 /**
253 * Filter one module's plan values down to the ones that meaningfully change
254 * the config: enabled (`true`) booleans, non-empty arrays, and non-empty
255 * scalars. Disabled toggles, empty lists, and zero/empty scalars are
256 * dropped — they represent "nothing to import" for that setting. Shared by
257 * the count (status) and the write (apply) so both agree. (FBS-82449)
258 *
259 * @param array<string,mixed> $values One module's mapped values.
260 * @return array<string,mixed> Only the meaningful entries.
261 */
262 private static function meaningful_values( array $values ): array {
263 $out = array();
264 foreach ( $values as $key => $value ) {
265 if ( is_bool( $value ) ) {
266 if ( $value ) {
267 $out[ $key ] = $value; // Only an enabled toggle imports.
268 }
269 } elseif ( is_array( $value ) ) {
270 if ( ! empty( $value ) ) {
271 $out[ $key ] = $value; // Non-empty list (e.g. excluded_urls).
272 }
273 } elseif ( '' !== $value && null !== $value && 0 !== $value && '0' !== $value ) {
274 $out[ $key ] = $value; // Non-empty scalar (e.g. cache_expiry).
275 }
276 // NOTE: a scalar 0 is deliberately dropped — for the numeric
277 // settings we import (cache_expiry, timeouts, db index) it means
278 // "unset" in every source, and emitting it would put a
279 // meaningless value in the plan the user is asked to confirm.
280 // The trap: this also swallows a legitimate 0 from a TRI-STATE
281 // key. WP Super Cache's `wp_cache_not_logged_in` is 0/1/2, where
282 // 0 means "cache everyone" — a real choice. read_wpsc_config_file()
283 // already preserves it as an int, but any future mapping of that
284 // key must bypass this helper or the user's choice is discarded
285 // silently. (#222 F4)
286 }
287 return $out;
288 }
289
290 /**
291 * Convert a source plugin's seconds-based lifetime to xSpeed's
292 * hour-granular `cache_expiry`, rounding to nearest within our 1–720
293 * bounds. See the call site for why flooring was wrong. (#218)
294 */
295 private static function seconds_to_hours( int $seconds ): int {
296 if ( $seconds <= 0 ) {
297 return 24;
298 }
299 return (int) max( 1, min( 720, (int) round( $seconds / 3600 ) ) );
300 }
301
302 /**
303 * Map a source plugin's preload interval (seconds) onto xSpeed's
304 * schedule enum. Anything under a day rounds to `hourly` — our finest
305 * grain — rather than being dropped for not matching exactly. (#218)
306 */
307 private static function seconds_to_schedule( int $seconds ): string {
308 if ( $seconds <= 0 ) {
309 return 'manual';
310 }
311 // Literal seconds rather than WEEK_IN_SECONDS / DAY_IN_SECONDS: this
312 // planner is a pure function and is unit-tested without a WP bootstrap.
313 if ( $seconds >= 604800 ) {
314 return 'weekly';
315 }
316 if ( $seconds >= 86400 ) {
317 return 'daily';
318 }
319 return 'hourly';
320 }
321
322 /**
323 * Human-readable notes about values this import cannot carry across
324 * exactly, for the preview panel. Empty when everything maps cleanly.
325 *
326 * A silent lossy conversion is the thing the user cannot audit: a
327 * 15-minute page-cache lifetime arriving as 1 hour looks deliberate.
328 * (#218)
329 *
330 * @param string $source_id Source plugin id.
331 * @param array $raw Source plugin's own config.
332 * @return string[] One note per lossy conversion.
333 */
334 public static function preview_notes( string $source_id, array $raw ): array {
335 $notes = array();
336
337 if ( 'w3-total-cache' === $source_id && isset( $raw['pgcache.lifetime'] ) ) {
338 $seconds = (int) $raw['pgcache.lifetime'];
339 $hours = self::seconds_to_hours( $seconds );
340 if ( $seconds > 0 && $seconds !== $hours * 3600 ) {
341 $notes[] = sprintf(
342 /* translators: 1: source lifetime in seconds, 2: imported lifetime in hours. */
343 __( 'Page cache lifetime %1$ds cannot be expressed in whole hours — importing as %2$dh.', 'xspeed' ),
344 $seconds,
345 $hours
346 );
347 }
348 }
349
350 // A value we deliberately DROP needs saying too. Rounding a lifetime
351 // was announced while a skipped secret was not, and skipping is the
352 // more consequential of the two: the object cache silently fails to
353 // connect afterwards and nothing on screen explains why. Only fires
354 // when the source really has a secret we cannot read — an empty
355 // password is not a loss. (#218 F3)
356 if ( 'w3-total-cache' === $source_id ) {
357 foreach ( array(
358 'objectcache.redis.password' => __( 'Redis password', 'xspeed' ),
359 'dbcache.redis.password' => __( 'Database-cache Redis password', 'xspeed' ),
360 'pgcache.redis.password' => __( 'Page-cache Redis password', 'xspeed' ),
361 ) as $key => $label ) {
362 if ( empty( $raw[ $key ] ) || ! is_string( $raw[ $key ] ) ) {
363 continue;
364 }
365 if ( null !== self::decrypt_w3tc_secret( $raw[ $key ] ) ) {
366 continue; // readable — it will be imported.
367 }
368 $notes[] = sprintf(
369 /* translators: %s: human label for the secret that could not be read. */
370 __( '%s is encrypted and could not be read — it will not be imported. Enter it again in xSpeed after importing.', 'xspeed' ),
371 $label
372 );
373 }
374 }
375
376
377 // A TLS endpoint imports its host and port, but NOT its transport:
378 // xSpeed has no TLS option in the object-cache schema and
379 // Redis_Client::connect() only ever builds "tcp://{$host}:{$port}".
380 // Keeping the scheme in the host made that failure silent AND
381 // unconditional — `tcp://tls://cache.internal:6380` fails to resolve
382 // the literal host "tls" — so the scheme is stripped and the loss is
383 // announced instead, the same way an unreadable secret is. The import
384 // then connects wherever plain TCP is also open, and says so where it
385 // cannot. (#224)
386 if ( 'w3-total-cache' === $source_id ) {
387 foreach ( array( 'redis', 'memcached' ) as $engine ) {
388 $servers = $raw[ 'objectcache.' . $engine . '.servers' ] ?? null;
389 if ( empty( $servers ) || ! is_array( $servers ) ) {
390 continue;
391 }
392 $first = (string) ( $servers[0] ?? '' );
393 if ( ! preg_match( '#^([a-z][a-z0-9+.-]*)://#i', $first, $m ) ) {
394 continue;
395 }
396 $notes[] = sprintf(
397 /* translators: 1: endpoint scheme, e.g. tls. 2: the endpoint as configured in the source plugin. */
398 __( 'Object-cache endpoint %2$s uses %1$s, which xSpeed does not support — importing the host and port only. The cache will connect only if the server also accepts a plain connection.', 'xspeed' ),
399 strtoupper( $m[1] ),
400 $first
401 );
402 }
403 }
404 return $notes;
405 }
406
407 /**
408 * Map a source plugin's "separate mobile cache" flag onto the cache patch
409 * WITHOUT enabling xSpeed's mobile_separate. The xSpeed static-file fast
410 * path is device-blind, so mobile_separate=ON disables it — and a source
411 * site that had the flag on very often serves identical HTML to every
412 * device (it was on by habit). Rather than silently kill the fast path on
413 * import, we keep mobile_separate off and, when the source had it on, set
414 * `mobile_separate_review` so the dashboard can prompt the user to turn it
415 * back on only if their site really differs per device.
416 * (FBS-83144 / FBS-83145)
417 *
418 * @param array $patch The plan patch (modified by reference).
419 * @param bool $source_on Whether the source plugin had mobile-separate on.
420 */
421 private static function map_mobile_separate( array &$patch, bool $source_on ): void {
422 if ( ! isset( $patch['cache'] ) || ! is_array( $patch['cache'] ) ) {
423 $patch['cache'] = array();
424 }
425 // Never import as ON; leave the fast path intact.
426 $patch['cache']['mobile_separate'] = false;
427 if ( $source_on ) {
428 $patch['cache']['mobile_separate_review'] = true;
429 }
430 }
431
432 /**
433 * Return the patch that `apply()` would write, without writing.
434 */
435 public static function preview( string $source_id ): ?array {
436 $full = self::preview_with_notes( $source_id );
437
438 return null === $full ? null : $full['patch'];
439 }
440
441 /**
442 * The preview plan together with the notes that explain it.
443 *
444 * preview_notes() exists to tell the user when a source value could not
445 * be carried over exactly — e.g. a 15-minute W3TC lifetime that xSpeed
446 * can only express in whole hours. It was written but never called, so
447 * the panel showed the rounded number as plain fact and the user had no
448 * way to know their setting had changed. Returning both from one detect
449 * pass keeps them in lockstep. (#224 F2)
450 *
451 * @param string $source_id Source plugin id.
452 * @return array{patch:array,notes:string[]}|null Null when undetected.
453 */
454 public static function preview_with_notes( string $source_id ): ?array {
455 $src = self::sources()[ $source_id ] ?? null;
456 if ( null === $src ) {
457 return null;
458 }
459 $raw = call_user_func( $src['detect'] );
460 if ( ! is_array( $raw ) ) {
461 return null;
462 }
463
464 return array(
465 'patch' => call_user_func( $src['plan'], $raw ),
466 'notes' => self::preview_notes( $source_id, $raw ),
467 );
468 }
469
470 /**
471 * Read source settings + write the translated patch. Returns the
472 * per-module write results, same shape as Recommendations::apply.
473 */
474 public static function apply( string $source_id ): array {
475 $patch = self::preview( $source_id );
476 if ( null === $patch ) {
477 return array();
478 }
479 $results = array();
480 foreach ( $patch as $slug => $values ) {
481 if ( ! is_string( $slug ) || ! is_array( $values ) ) {
482 continue;
483 }
484 // Import only the settings that are actually enabled / non-empty in
485 // the source. A plan patch emits every mapped field including the
486 // ones the source turned OFF; merging those `false`/empty values
487 // would silently DISABLE settings the user already had on in xSpeed.
488 // Migration is additive — it never clobbers existing config with a
489 // source's disabled value. (FBS-82449)
490 $meaningful = self::meaningful_values( $values );
491 if ( empty( $meaningful ) ) {
492 continue;
493 }
494
495 // The page-cache switch is NOT a module setting. It lives in the
496 // `xspeed_options` blob, and turning it on means installing the
497 // drop-in, setting WP_CACHE and installing the rewrite — work only
498 // Cache::toggle() does. Writing it to xspeed_module_cache['enabled']
499 // put it in a key that is not in CacheModule::settings_schema() and
500 // that nothing reads, so every importer's `cache.enabled` was a
501 // dead destination: the import reported success and the site came
502 // out of it with caching still off. (#219)
503 $applied_enable = null;
504 if ( 'cache' === $slug && array_key_exists( 'enabled', $meaningful ) ) {
505 $applied_enable = (bool) $meaningful['enabled'];
506 unset( $meaningful['enabled'] );
507 }
508
509 // Union list values with what is already in EFFECT rather than
510 // overwriting them.
511 //
512 // A source's exclusion list is what IT needed; ours covers cases it
513 // handled with separate settings we don't read (W3TC has
514 // pgcache.cache.feed, pgcache.reject.request_head, …). Assigning
515 // the mapped array straight over ours dropped every xSpeed-specific
516 // safety rule — /wp-json/, /xmlrpc.php, ~wp-.*\.php, /feed/ and
517 // ~sitemap(_index)?\.xml among them — and feeds and sitemaps
518 // started being served from the page cache.
519 //
520 // Merge against Settings_Manager::get(), not the raw option: module
521 // defaults live in the SCHEMA, so on a fresh install the stored
522 // option is empty and a union with it would still lose all of them.
523 // The class comment above already promised migration is additive;
524 // before this that only held for scalars. (#218)
525 $effective = (array) Settings_Manager::get( $slug );
526 foreach ( $meaningful as $key => $value ) {
527 if ( ! is_array( $value ) ) {
528 continue;
529 }
530 $existing = $effective[ $key ] ?? array();
531 if ( ! is_array( $existing ) || empty( $existing ) ) {
532 continue;
533 }
534 $meaningful[ $key ] = array_values( array_unique( array_merge( $existing, $value ) ) );
535 }
536
537 // Write through Settings_Manager::update(), not a raw
538 // update_option().
539 //
540 // The raw write skipped everything that makes a settings write
541 // safe: schema coercion, per-field range/type validation, secret
542 // encryption at rest, `_version` maintenance, and log_changes() —
543 // so imported values landed unvalidated and no per-module change
544 // ever reached the activity log, only the single "Imported
545 // settings from…" line. It also means a bad value from a source
546 // plugin could be stored where the UI could never have set it.
547 //
548 // update() returns the module's public view, which is also the
549 // honest success signal: it reflects what is actually stored,
550 // where update_option()'s return value conflates "no change
551 // needed" with "write failed". (#218)
552 $stored = Settings_Manager::update( $slug, $meaningful );
553
554 // Did the intent land? Not "is the stored value identical" — for a
555 // list we deliberately UNION with the existing rules, so the stored
556 // array is legitimately bigger than what we passed in. Assert each
557 // imported value is PRESENT instead, which is what "applied" means
558 // and what a lossy or rejected write would fail.
559 //
560 // Secrets come back masked in the public view, so they are taken on
561 // trust rather than compared against plaintext.
562 $ok = ! empty( $stored );
563 foreach ( $meaningful as $key => $value ) {
564 if ( ! array_key_exists( $key, $stored ) ) {
565 // A key the module deliberately owns elsewhere (cache.enabled
566 // lives in xspeed_options and is applied via Cache::toggle)
567 // is not a failed write.
568 continue;
569 }
570 if ( is_string( $stored[ $key ] ) && Settings_Manager::is_masked_secret( $stored[ $key ] ) ) {
571 continue;
572 }
573 if ( is_array( $value ) ) {
574 if ( array_diff( $value, (array) $stored[ $key ] ) ) {
575 $ok = false;
576 break;
577 }
578 continue;
579 }
580 if ( $stored[ $key ] != $value ) { // phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison -- values round-trip through the DB and schema coercion, so a stored "1" must still count as an applied true.
581 $ok = false;
582 break;
583 }
584 }
585
586 $applied = array_keys( $meaningful );
587
588 if ( null !== $applied_enable ) {
589 $state = Cache::toggle( $applied_enable );
590 $applied[] = 'enabled';
591 // Enabling is only real if the transaction went through. The
592 // drop-in alone is not the test: a refusal reports the
593 // artifacts already on disk, so a site whose xSpeed drop-in
594 // was still installed read a refused write as success.
595 if ( ! empty( $state['blocked'] ) ) {
596 $ok = false;
597 } elseif ( $applied_enable && empty( $state['dropin_installed'] ) ) {
598 $ok = false;
599 }
600 }
601
602 if ( empty( $applied ) ) {
603 continue;
604 }
605
606 $results[ $slug ] = array(
607 'ok' => $ok,
608 'applied' => $applied,
609 );
610
611 // Importing an object-cache backend has to actually turn it on.
612 //
613 // Writing `backend = redis` only records an intention: the drop-in
614 // is what makes WordPress use it. Migration never installed one,
615 // and on a LiteSpeed/W3TC source it also deactivates the source
616 // plugin, which REMOVES that plugin's drop-in — so a site with a
617 // working Redis object cache came out of a "successful" import with
618 // no persistent object cache at all, and nothing said so.
619 //
620 // Object_Cache::enable() tests the connection before writing
621 // anything, so an unreachable server degrades to a reported
622 // failure rather than a broken drop-in. (#218 / #217)
623 if ( 'object-cache' === $slug && $ok && ! empty( $meaningful['backend'] ) ) {
624 $results[ $slug ] = self::enable_object_cache( $results[ $slug ] );
625 }
626 }
627 // Mark the source imported on the same terms the handover uses.
628 // Gating this on completed_successfully() meant a host without Redis
629 // — where the object cache can never enable — never recorded the
630 // import at all, so the migration notice came straight back after a
631 // migration that had worked. (#189)
632 if ( self::safe_to_hand_over( $results ) ) {
633 self::mark_imported( $source_id );
634 }
635 return $results;
636 }
637
638 /**
639 * Whether an apply result represents a complete, retry-free import.
640 *
641 * A non-empty applied list proves only that a group was attempted. The
642 * source must stay actionable when any attempted group reports failure.
643 *
644 * @param array $results Per-module apply results.
645 */
646 public static function completed_successfully( array $results ): bool {
647 if ( empty( $results ) ) {
648 return false;
649 }
650
651 $applied = false;
652 foreach ( $results as $result ) {
653 if ( ! is_array( $result ) || empty( $result['ok'] ) ) {
654 return false;
655 }
656 if ( ! empty( $result['applied'] ) ) {
657 $applied = true;
658 }
659 }
660
661 return $applied;
662 }
663
664 /**
665 * Modules whose failure must NOT block switching the old plugin off.
666 *
667 * `completed_successfully()` is all-or-nothing, which is right for
668 * reporting but wrong as a deactivation gate: it made one optional module
669 * veto the whole handover. The object cache is the case that bites —
670 * enabling it needs a running Redis or Memcached, so on a host without
671 * one it ALWAYS fails, and a site that migrated perfectly was left with
672 * both cache plugins active while the notice had promised otherwise.
673 *
674 * These are additive extras: the site is no worse off without them than
675 * it was before the migration. Page caching is deliberately absent — if
676 * THAT did not take, the old plugin has to stay on. (#189)
677 */
678 private const OPTIONAL_FOR_HANDOVER = array(
679 'object-cache',
680 'cdn',
681 'preloader',
682 /*
683 * `cache` is optional for the HANDOVER decision specifically, and it
684 * has to be, because the source itself is usually why it failed: the
685 * source holds advanced-cache.php, so page cache cannot apply, so we
686 * refuse to deactivate the source, so it keeps holding the drop-in.
687 * That loop is what left sites with no cache at all (#391).
688 *
689 * Deactivating first and enabling after is the resolution -- see
690 * MigrationModule::restore_own_environment(), which now turns caching
691 * on once the field is free. A cache failure is still reported to the
692 * user either way; it just no longer vetoes the switch-off the notice
693 * already promised.
694 */
695 'cache',
696 );
697
698 /**
699 * Is it safe to switch the source plugin off?
700 *
701 * Stricter than "did anything import" and looser than "did everything":
702 * every module that is not an optional extra must have applied cleanly,
703 * and at least one must have applied at all. A failure in an optional
704 * module is reported to the user either way — it just does not veto the
705 * handover the notice already promised.
706 *
707 * @param array<string,array<string,mixed>> $results apply() output.
708 */
709 public static function safe_to_hand_over( array $results ): bool {
710 if ( empty( $results ) ) {
711 return false;
712 }
713
714 $applied = false;
715 foreach ( $results as $slug => $result ) {
716 if ( ! is_array( $result ) ) {
717 return false;
718 }
719 if ( empty( $result['ok'] ) ) {
720 if ( ! in_array( (string) $slug, self::OPTIONAL_FOR_HANDOVER, true ) ) {
721 return false;
722 }
723 continue;
724 }
725 if ( ! empty( $result['applied'] ) ) {
726 $applied = true;
727 }
728 }
729
730 return $applied;
731 }
732
733 /**
734 * Install the object-cache drop-in for a just-imported backend, and fold
735 * the outcome into that module's result row.
736 *
737 * A failure here is reported, never silent: the import has already told
738 * the user their object cache came across.
739 *
740 * @param array $result The module's result row so far.
741 * @return array The row, with ok/message reflecting the drop-in install.
742 */
743 private static function enable_object_cache( array $result ): array {
744 if ( ! class_exists( __NAMESPACE__ . '\\Object_Cache' ) ) {
745 return $result;
746 }
747
748 $opts = (array) Settings_Manager::get( 'object-cache' );
749 $state = Object_Cache::enable( $opts );
750
751 $result['ok'] = ! empty( $state['ok'] );
752 $result['object_cache_ready'] = ! empty( $state['ok'] );
753 if ( empty( $state['ok'] ) ) {
754 // Surfaced by the panel instead of a green "imported" message.
755 $result['message'] = (string) ( $state['message'] ?? 'Could not enable the object cache.' );
756 }
757
758 return $result;
759 }
760
761 // ─────────────────────────── WP Rocket ───────────────────────────
762
763 public static function detect_wp_rocket(): ?array {
764 $opt = get_option( 'wp_rocket_settings', null );
765 return is_array( $opt ) ? $opt : null;
766 }
767
768 /**
769 * Translate WP Rocket's `wp_rocket_settings` array into our module
770 * settings. Only safe-to-port booleans + counts; behaviorally
771 * different toggles (Critical CSS, RUCSS) skip — Pro handles those.
772 *
773 * @param array $r raw wp_rocket_settings.
774 */
775 public static function plan_wp_rocket( array $r ): array {
776 $patch = array();
777 // Page caching.
778 // WP Rocket has no master on/off switch — installing and activating it
779 // IS enabling page caching, so a detected settings blob means the
780 // source site was caching. `cache_logged_user` is NOT that switch: it
781 // controls whether LOGGED-IN users get cached pages. Reading it as the
782 // master meant the most ordinary WP Rocket configuration of all —
783 // caching on, but not for logged-in users (`cache_logged_user = 0`) —
784 // imported as caching OFF, the exact inverse of the user's intent. The
785 // `! isset` fallback then made a missing key mean ON, so the result was
786 // right only by accident. (#222 F2)
787 $patch['cache'] = array(
788 'enabled' => true,
789 // The Cache module's TTL setting is `cache_expiry` (hours), NOT
790 // `expiry_hours` — the latter is a dead key nothing reads, so the
791 // imported lifetime was silently dropped. Clamp to the same 1–720h
792 // range the Cache schema + LiteSpeed importer use. (FBS-83144)
793 'cache_expiry' => isset( $r['purge_cron_interval'] ) ? max( 1, min( 720, (int) ( (int) $r['purge_cron_interval'] / 3600 ) ) ) : 24,
794 );
795 // Excluded URLs / cookies — both are arrays of strings in WP Rocket.
796 if ( ! empty( $r['cache_reject_uri'] ) && is_array( $r['cache_reject_uri'] ) ) {
797 $patch['cache']['excluded_urls'] = array_values( array_filter( array_map( 'strval', $r['cache_reject_uri'] ) ) );
798 }
799 if ( ! empty( $r['cache_reject_cookies'] ) && is_array( $r['cache_reject_cookies'] ) ) {
800 $patch['cache']['excluded_cookies'] = array_values( array_filter( array_map( 'strval', $r['cache_reject_cookies'] ) ) );
801 }
802
803 // Minify.
804 $patch['minify'] = array(
805 'minify_html' => ! empty( $r['minify_html'] ),
806 'minify_css' => ! empty( $r['minify_css'] ),
807 'minify_js' => ! empty( $r['minify_js'] ),
808 'combine_css' => ! empty( $r['minify_concatenate_css'] ),
809 'combine_js' => ! empty( $r['minify_concatenate_js'] ),
810 'defer_js' => ! empty( $r['defer_all_js'] ),
811 );
812
813 // Lazy load.
814 $patch['lazy'] = array(
815 'lazy_images' => ! empty( $r['lazyload'] ),
816 'lazy_iframes' => ! empty( $r['lazyload_iframes'] ),
817 'lazy_videos' => ! empty( $r['lazyload_youtube'] ),
818 );
819 if ( ! empty( $r['lazyload_css_bg_img'] ) ) {
820 $patch['lazy']['lazy_background_images'] = true;
821 }
822
823 // Separate Mobile Cache — do NOT import this as ON. WP Rocket's
824 // "separate cache files for mobile" is frequently left on by habit even
825 // when the site serves identical HTML to every device, and xSpeed's
826 // static-file fast path is device-blind — enabling mobile_separate
827 // DISABLES it, silently dropping the site from HIT (nginx) to HIT (php).
828 // Instead, keep the fast path (mobile_separate stays false) and flag it
829 // for review so the dashboard can prompt the user to re-enable it only
830 // if their site really differs per device. (FBS-83144 / FBS-83145)
831 self::map_mobile_separate( $patch, ! empty( $r['do_caching_mobile_files'] ) );
832
833 // Preloader.
834 if ( ! empty( $r['manual_preload'] ) || ! empty( $r['sitemap_preload'] ) ) {
835 $patch['preloader'] = array(
836 'enabled' => true,
837 'schedule' => 'daily',
838 );
839 if ( ! empty( $r['sitemap_preload_url'] ) && is_array( $r['sitemap_preload_url'] ) ) {
840 $patch['preloader']['sitemap_urls'] = array_values( array_filter( array_map( 'strval', $r['sitemap_preload_url'] ) ) );
841 }
842 }
843
844 // Bloat — WP Rocket's "Disable Emoji" and "Disable WordPress embeds".
845 $bloat = array_filter(
846 array(
847 'disable_emojis' => ! empty( $r['emoji'] ),
848 'disable_oembed' => ! empty( $r['embeds'] ),
849 )
850 );
851 if ( $bloat ) {
852 $patch['bloat'] = $bloat;
853 }
854
855 // CDN — WP Rocket stores CDN hosts in cdn_cnames (array).
856 if ( ! empty( $r['cdn'] ) && ! empty( $r['cdn_cnames'] ) && is_array( $r['cdn_cnames'] ) ) {
857 $first = (string) ( $r['cdn_cnames'][0] ?? '' );
858 if ( '' !== $first ) {
859 $patch['cdn'] = array(
860 'enabled' => true,
861 'cdn_url' => $first,
862 );
863 }
864 }
865
866 return $patch;
867 }
868
869 // ─────────────────────────── W3 Total Cache ──────────────────────
870
871 public static function detect_w3tc(): ?array {
872 // W3 Total Cache does NOT store its config in the options table — it
873 // writes a PHP file at wp-content/w3tc-config/master.php whose body
874 // is a short PHP guard followed by a JSON blob of dotted-key settings
875 // (pgcache.enabled, minify.html.enable, …). Reading w3tc_config /
876 // w3tc_master_settings options always returned null, so detection
877 // failed on every install. Read + parse the config file instead.
878 $cfg = self::read_w3tc_config_file();
879 if ( is_array( $cfg ) && ! empty( $cfg ) ) {
880 return $cfg;
881 }
882 // Defensive fallback for any build that did persist an options blob.
883 $opt = get_option( 'w3tc_config', null );
884 if ( ! is_array( $opt ) ) {
885 $opt = get_option( 'w3tc_master_settings', null );
886 }
887 return is_array( $opt ) ? $opt : null;
888 }
889
890 /**
891 * Parse W3TC's master config file into a flat dotted-key array.
892 * Format: a short PHP guard (a php-open, exit, php-close) immediately
893 * followed by a JSON object. We strip everything up to and including the
894 * PHP closing tag, then JSON-decode the remainder.
895 *
896 * @return array|null parsed config, or null if the file is missing/unreadable.
897 */
898 private static function read_w3tc_config_file(): ?array {
899 if ( ! defined( 'WP_CONTENT_DIR' ) ) {
900 return null;
901 }
902 $path = WP_CONTENT_DIR . '/w3tc-config/master.php';
903 if ( ! is_readable( $path ) ) {
904 return null;
905 }
906 $raw = file_get_contents( $path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- reading another plugin's local config file; WP_Filesystem is overkill for a one-shot read.
907 if ( false === $raw || '' === $raw ) {
908 return null;
909 }
910 // Drop the leading PHP guard and decode the JSON tail. The pattern
911 // matches up to the first PHP closing tag; built from a char-code so
912 // no literal close tag appears in this source file.
913 $close_tag = '?' . '>';
914 $json = preg_replace( '/^.*?' . preg_quote( $close_tag, '/' ) . '/s', '', $raw );
915 $cfg = json_decode( trim( (string) $json ), true );
916 return is_array( $cfg ) ? $cfg : null;
917 }
918
919 public static function plan_w3tc( array $r ): array {
920 $patch = array();
921 $patch['cache'] = array(
922 'enabled' => ! empty( $r['pgcache.enabled'] ),
923 // Cache module reads `cache_expiry` (hours), not the dead
924 // `expiry_hours` key — see plan_wp_rocket. (FBS-83144)
925 // W3TC stores this in SECONDS and sub-hour values are common (900 /
926 // 1800 are its own defaults). Integer division floored those to 0
927 // and max(1, …) then bumped them to a full hour, so a 5-minute
928 // lifetime silently became 12x longer. xSpeed's cache_expiry is
929 // hour-granular, so the closest honest answer is to round to
930 // nearest and keep the 1-hour floor for anything under 30 minutes.
931 // preview_notes() tells the user when the source value could not be
932 // represented exactly. (#218)
933 'cache_expiry' => isset( $r['pgcache.lifetime'] ) ? self::seconds_to_hours( (int) $r['pgcache.lifetime'] ) : 24,
934 );
935 $w3_list = static function ( $key ) use ( $r ): array {
936 $v = $r[ $key ] ?? null;
937 return is_array( $v ) ? array_values( array_filter( array_map( 'strval', $v ) ) ) : array();
938 };
939
940 foreach ( array(
941 'pgcache.reject.uri' => 'excluded_urls',
942 'pgcache.reject.cookie' => 'excluded_cookies',
943 'pgcache.reject.ua' => 'bypass_user_agents',
944 ) as $src => $dest ) {
945 $vals = $w3_list( $src );
946 if ( $vals ) {
947 $patch['cache'][ $dest ] = $vals;
948 }
949 }
950
951 // `pgcache.accept.qs` is deliberately NOT imported. W3TC ships ~100
952 // tracking parameters in it by default, so importing it wholesale
953 // would bury the user's own additions under a stock list — and
954 // apply() unions lists, which would make that permanent. Our own
955 // ignored_query_params default already covers the same ground.
956 // (#218)
957
958 self::map_mobile_separate( $patch, ! empty( $r['mobile.enabled'] ) );
959
960 // W3TC's minify "method" encodes BOTH operations in one value:
961 // 'minify' | 'combine' | 'both'. Combining is on for the latter two.
962 $method_combines = static function ( $key ) use ( $r ): bool {
963 $m = isset( $r[ $key ] ) ? (string) $r[ $key ] : '';
964 return 'combine' === $m || 'both' === $m;
965 };
966
967 // The master switch gates every child mapping.
968 //
969 // W3TC keeps its child defaults POPULATED while `minify.enabled` is
970 // off — `minify.css.enable`, `minify.js.enable` and the method fields
971 // all read as truthy on a site that has minification deliberately
972 // switched off. Reading the children alone therefore imported Minify
973 // CSS/JS and Combine CSS/JS as ON for a user who had turned the whole
974 // feature off, which can change front-end output and introduce the
975 // exact CSS/JS regressions migration is supposed to avoid.
976 //
977 // Every other W3TC block here already gates this way — pgcache on
978 // `pgcache.enabled`, lazy load on `lazyload.enabled`, browser cache on
979 // `browsercache.enabled`, object cache on `objectcache.enabled`.
980 // Minify was the one that did not. (#218)
981 $minify_on = ! empty( $r['minify.enabled'] );
982
983 $patch['minify'] = array(
984 'minify_html' => $minify_on && ! empty( $r['minify.html.enable'] ),
985 'minify_css' => $minify_on && ! empty( $r['minify.css.enable'] ),
986 'minify_js' => $minify_on && ! empty( $r['minify.js.enable'] ),
987 // There is no `minify.css.combine`; CSS combining lives in the
988 // method. JS splits its combine flag across three placements, and
989 // any one of them means the user wanted combining.
990 'combine_css' => $minify_on && $method_combines( 'minify.css.method' ),
991 'combine_js' => $minify_on && (
992 $method_combines( 'minify.js.method' )
993 || ! empty( $r['minify.js.combine.header'] )
994 || ! empty( $r['minify.js.combine.body'] )
995 || ! empty( $r['minify.js.combine.footer'] )
996 ),
997 );
998
999 // ── Lazy load ────────────────────────────────────────────────────
1000 if ( ! empty( $r['lazyload.enabled'] ) ) {
1001 $patch['lazy'] = array( 'lazy_images' => true );
1002 $excluded = $w3_list( 'lazyload.exclude' );
1003 if ( $excluded ) {
1004 $patch['lazy']['excluded_images'] = $excluded;
1005 }
1006 }
1007
1008 // ── Browser cache + compression ──────────────────────────────────
1009 if ( ! empty( $r['browsercache.enabled'] ) ) {
1010 $patch['browser-cache'] = array( 'enabled' => true );
1011 foreach ( array(
1012 'browsercache.cssjs.lifetime' => 'asset_ttl',
1013 'browsercache.html.lifetime' => 'html_ttl',
1014 ) as $src => $dest ) {
1015 if ( ! empty( $r[ $src ] ) ) {
1016 $patch['browser-cache'][ $dest ] = (int) $r[ $src ];
1017 }
1018 }
1019 // W3TC has a compression toggle per content type; xSpeed has one
1020 // switch, so any of them being on means the user wanted GZIP.
1021 if ( ! empty( $r['browsercache.html.compression'] ) || ! empty( $r['browsercache.cssjs.compression'] ) || ! empty( $r['browsercache.other.compression'] ) ) {
1022 $patch['gzip'] = array( 'gzip_enabled' => true );
1023 }
1024 }
1025
1026 // ── Preloader (W3TC calls it "cache priming") ────────────────────
1027 if ( ! empty( $r['pgcache.prime.enabled'] ) ) {
1028 $patch['preloader'] = array( 'enabled' => true );
1029 if ( ! empty( $r['pgcache.prime.sitemap'] ) ) {
1030 $patch['preloader']['sitemap_url'] = (string) $r['pgcache.prime.sitemap'];
1031 }
1032 if ( ! empty( $r['pgcache.prime.interval'] ) ) {
1033 $patch['preloader']['schedule'] = self::seconds_to_schedule( (int) $r['pgcache.prime.interval'] );
1034 }
1035 if ( ! empty( $r['pgcache.prime.post.update.enabled'] ) ) {
1036 $patch['preloader']['warm_on_publish'] = true;
1037 }
1038 }
1039
1040 // ── Bloat ────────────────────────────────────────────────────────
1041 if ( ! empty( $r['jquerymigrate.disabled'] ) ) {
1042 $patch['bloat'] = array( 'strip_jquery_migrate' => true );
1043 }
1044
1045 if ( ! empty( $r['objectcache.enabled'] ) && ! empty( $r['objectcache.engine'] ) ) {
1046 $is_memcached = 'memcached' === $r['objectcache.engine'];
1047 $engine = $is_memcached ? 'memcached' : 'redis';
1048
1049 $patch['object-cache'] = array( 'backend' => $engine );
1050
1051 // W3TC namespaces these by engine — `objectcache.redis.servers` /
1052 // `objectcache.memcached.servers`. There is no bare
1053 // `objectcache.servers`, so the host/port branch here could never
1054 // run for a W3TC source: a site with Redis on a non-default host or
1055 // port silently fell back to 127.0.0.1:6379. (#218)
1056 $servers = $r[ 'objectcache.' . $engine . '.servers' ] ?? null;
1057 if ( ! empty( $servers ) && is_array( $servers ) ) {
1058 $first = (string) ( $servers[0] ?? '' );
1059
1060 // A scheme says HOW to connect, not WHERE. Left in place it
1061 // becomes the hostname: Redis_Client::connect() builds
1062 // "tcp://{$host}:{$port}", so `tls://redis.example` produces
1063 // `tcp://tls://redis.example:6380` and resolution fails on the
1064 // literal host "tls". The same string is also written into the
1065 // drop-in's WP_REDIS_HOST, so the imported object cache could
1066 // never connect. A managed Redis on TLS is the common case.
1067 // Bracketed IPv6 is left alone — stream_socket_client() wants
1068 // the brackets. (#224)
1069 $first = (string) preg_replace( '#^[a-z][a-z0-9+.-]*://#i', '', $first );
1070 $separator = strrpos( $first, ':' );
1071 if ( false !== $separator ) {
1072 $host = substr( $first, 0, $separator );
1073 $port = substr( $first, $separator + 1 );
1074 $patch['object-cache'][ $engine . '_host' ] = $host;
1075 $patch['object-cache'][ $engine . '_port' ] = (int) $port;
1076 }
1077 }
1078
1079 // Everything else that has a destination in ObjectCacheModule and
1080 // was previously dropped. A non-zero Redis DB index matters most:
1081 // the connection would succeed while pointing at the wrong dataset.
1082 $copy = $is_memcached
1083 ? array( 'objectcache.memcached.persistent' => 'persistent' )
1084 : array(
1085 'objectcache.redis.dbid' => 'redis_database',
1086 'objectcache.redis.password' => 'redis_password',
1087 'objectcache.redis.persistent' => 'persistent',
1088 'objectcache.redis.timeout' => 'connection_timeout',
1089 );
1090 $numeric_dests = array( 'redis_database', 'connection_timeout' );
1091 foreach ( $copy as $src => $dest ) {
1092 if ( ! isset( $r[ $src ] ) || '' === $r[ $src ] ) {
1093 continue;
1094 }
1095 // W3TC stores an unset timeout / db index as 0, which carries no
1096 // intent — emitting it would put a meaningless value in the plan
1097 // preview the user is asked to confirm. Only the numeric fields
1098 // get that treatment: casting a password to int would read
1099 // "s3cret" as 0 and silently drop it.
1100 $is_numeric_dest = in_array( $dest, $numeric_dests, true );
1101 if ( $is_numeric_dest && 0 === (int) $r[ $src ] ) {
1102 continue;
1103 }
1104 // W3 Total Cache 2.8+ encrypts secrets in its config file
1105 // (Util_Crypto, `enc:v1:` prefix). Copying the ciphertext
1106 // through would hand Redis a password that can never
1107 // authenticate — and it is exactly the password-protected
1108 // sources this mapping exists to serve. Decrypt with W3TC's
1109 // own helper; if that is unavailable (no crypto key, plugin
1110 // files already gone), SKIP the field rather than import an
1111 // unusable value: a missing password is something the user
1112 // can fix in one edit, a silently wrong one is not. (#224 F1)
1113 if ( 'redis_password' === $dest ) {
1114 $secret = self::decrypt_w3tc_secret( (string) $r[ $src ] );
1115 if ( null === $secret ) {
1116 continue;
1117 }
1118 $patch['object-cache'][ $dest ] = $secret;
1119 continue;
1120 }
1121 $patch['object-cache'][ $dest ] = $is_numeric_dest
1122 ? (int) $r[ $src ]
1123 : $r[ $src ];
1124 }
1125 // W3TC's Cache_Redis only ever calls auth( $password ) — it has no
1126 // ACL username support — so a W3TC source never carries one and we
1127 // must not invent a redis_user here.
1128 }
1129
1130 return $patch;
1131 }
1132
1133 /**
1134 * Resolve a W3 Total Cache secret to plaintext.
1135 *
1136 * W3TC 2.8+ stores secrets encrypted with its own `Util_Crypto`, marked
1137 * by an `enc:v1:` prefix. A plaintext value (older W3TC, or a config
1138 * written before encryption landed) is returned unchanged.
1139 *
1140 * Returns null when the value is encrypted but cannot be decrypted —
1141 * W3TC's classes are not loadable, or its crypto key is gone. Callers
1142 * MUST treat null as "skip this field", never as an empty password:
1143 * importing the ciphertext guarantees an auth failure, and importing an
1144 * empty string would silently drop a password the source really had.
1145 *
1146 * @param string $value Raw value from the W3TC config.
1147 * @return string|null Plaintext, or null when it cannot be resolved.
1148 */
1149 private static function decrypt_w3tc_secret( string $value ): ?string {
1150 if ( 0 !== strpos( $value, 'enc:' ) ) {
1151 return $value;
1152 }
1153
1154 if ( ! class_exists( '\\W3TC\\Util_Crypto' ) ) {
1155 return null;
1156 }
1157
1158 // W3TC's method is envelope_decrypt(), NOT decrypt(). Guarding on the
1159 // wrong name meant method_exists() was false on every install, the
1160 // helper returned null before it ever ran, and the password was
1161 // silently dropped from every import — the exact users the decrypt
1162 // support was written for. Verified against W3TC 2.10.5:
1163 //
1164 // ::decrypt() MISSING
1165 // ::envelope_decrypt() EXISTS
1166 // ::is_envelope() EXISTS
1167 //
1168 // Kept as a list so an older/newer W3TC that renames it again
1169 // degrades to "skip the field" rather than to a fatal. (#218 F1)
1170 $method = null;
1171 foreach ( array( 'envelope_decrypt', 'decrypt' ) as $candidate ) {
1172 if ( method_exists( '\\W3TC\\Util_Crypto', $candidate ) ) {
1173 $method = $candidate;
1174 break;
1175 }
1176 }
1177 if ( null === $method ) {
1178 return null;
1179 }
1180
1181 try {
1182 $plain = \W3TC\Util_Crypto::$method( $value );
1183 } catch ( \Throwable $e ) {
1184 return null;
1185 }
1186
1187 // A failed decrypt can come back as false/null/'' or as the
1188 // untouched ciphertext depending on the failure mode. None of those
1189 // are a usable password.
1190 if ( ! is_string( $plain ) || '' === $plain || 0 === strpos( $plain, 'enc:' ) ) {
1191 return null;
1192 }
1193
1194 return $plain;
1195 }
1196
1197 // ─────────────────────────── WP Super Cache ──────────────────────
1198
1199 public static function detect_wpsc(): ?array {
1200 // WP Super Cache stores its settings as PHP globals in
1201 // wp-content/wp-cache-config.php (NOT the options table — the old
1202 // get_option('wp_cache_enabled') reads always returned null). Parse
1203 // the config file for the globals plan_wpsc() needs. If the file
1204 // doesn't exist yet (plugin active but never configured), fall back
1205 // to a minimal "active" marker so the source still appears in the UI
1206 // and a default import is possible.
1207 $cfg = self::read_wpsc_config_file();
1208 if ( is_array( $cfg ) && ! empty( $cfg ) ) {
1209 return $cfg;
1210 }
1211 if ( self::plugin_active( 'wp-super-cache/wp-cache.php' ) ) {
1212 // Active but unconfigured — expose the on/off intent only.
1213 return array( 'cache_enabled' => defined( 'WPCACHEHOME' ) );
1214 }
1215 return null;
1216 }
1217
1218 /**
1219 * Parse the WP Super Cache config file for the globals we map. The file
1220 * is plain PHP assigning `$wp_cache_* = …;` lines; we extract them with a
1221 * regex rather than including the file (including it would define
1222 * constants / run code in our request).
1223 *
1224 * @return array|null name => value for the recognised globals, or null.
1225 */
1226 private static function read_wpsc_config_file(): ?array {
1227 if ( ! defined( 'WP_CONTENT_DIR' ) ) {
1228 return null;
1229 }
1230 $path = WP_CONTENT_DIR . '/wp-cache-config.php';
1231 if ( ! is_readable( $path ) ) {
1232 return null;
1233 }
1234 $raw = file_get_contents( $path ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- one-shot read of another plugin's config file.
1235 if ( false === $raw || '' === $raw ) {
1236 return null;
1237 }
1238 $out = array();
1239
1240 // `$cache_enabled` is the master switch and `$super_cache_enabled`
1241 // selects mod_rewrite mode. WP Super Cache does NOT define
1242 // `$wp_cache_enabled` — reading that name meant the on/off intent was
1243 // never populated, plan_wpsc() computed `enabled => false`, and
1244 // meaningful_values() then dropped the false boolean entirely. A site
1245 // actively serving cached HTML migrated to caching OFF, silently. (#219)
1246 $keys = array( 'cache_enabled', 'super_cache_enabled', 'wp_cache_mod_rewrite', 'wp_cache_mobile_enabled', 'wp_cache_make_known_anon' );
1247 foreach ( $keys as $key ) {
1248 // Match `$key = 1;` / `$key = '1';` / `$key = true;` etc.
1249 if ( preg_match( '/\$' . preg_quote( $key, '/' ) . '\s*=\s*([^;]+);/', $raw, $m ) ) {
1250 $val = trim( $m[1], " \t'\"" );
1251 $out[ $key ] = in_array( strtolower( $val ), array( '1', 'true' ), true );
1252 }
1253 }
1254
1255 // Tri-state, so it cannot go through the boolean cast above:
1256 // 0 = cache everyone, 1 = skip visitors carrying any cookie,
1257 // 2 = skip logged-in visitors (WPSC's own recommended setting).
1258 // Casting collapsed 2 to false — the exact inverse of the user's
1259 // intent — which is harmless only while nothing maps the key. (#219)
1260 if ( preg_match( '/\$wp_cache_not_logged_in\s*=\s*([^;]+);/', $raw, $m ) ) {
1261 $out['wp_cache_not_logged_in'] = (int) trim( $m[1], " \t'\"" );
1262 }
1263
1264 return ! empty( $out ) ? $out : null;
1265 }
1266
1267 /** Thin wrapper so detection works before admin plugin.php is loaded. */
1268 private static function plugin_active( string $plugin ): bool {
1269 $active = (array) get_option( 'active_plugins', array() );
1270 if ( in_array( $plugin, $active, true ) ) {
1271 return true;
1272 }
1273 // Network-activated (multisite).
1274 $network = (array) get_site_option( 'active_sitewide_plugins', array() );
1275 return isset( $network[ $plugin ] );
1276 }
1277
1278 public static function plan_wpsc( array $r ): array {
1279 $plan = array(
1280 'cache' => array(
1281 // Either flag means WP Super Cache was serving: `cache_enabled`
1282 // is the master switch, `super_cache_enabled` only picks
1283 // mod_rewrite over PHP delivery.
1284 'enabled' => ! empty( $r['cache_enabled'] ) || ! empty( $r['super_cache_enabled'] ),
1285 ),
1286 );
1287 // See plan_wp_rocket: never import Separate Mobile Cache as ON — it
1288 // disables the device-blind static fast path. Flag for review instead.
1289 self::map_mobile_separate( $plan, ! empty( $r['wp_cache_mobile_enabled'] ) );
1290 return $plan;
1291 }
1292
1293 // ─────────────────────────── LiteSpeed Cache ─────────────────────
1294
1295 /**
1296 * Read LiteSpeed Cache settings into a flat `name => value` array keyed
1297 * by LiteSpeed's dotted setting names (cache, cache-mobile, optm-*,
1298 * media-*, object-*, cdn-*, …) — the shape plan_litespeed() expects.
1299 *
1300 * Storage has changed across LiteSpeed versions:
1301 * - v4+ (current): ONE option PER setting, named `litespeed.conf.<name>`
1302 * (e.g. litespeed.conf.cache, litespeed.conf.cache-mobile). There is
1303 * NO single `litespeed.conf` blob — reading that key returns null,
1304 * which is why detection used to fail on every modern install.
1305 * - v3 and earlier: a single serialized array under `litespeed.conf`
1306 * (or the legacy `litespeed-cache-conf`).
1307 * We handle all three: try the per-option family first (the common case
1308 * today), then fall back to the legacy single-blob options.
1309 *
1310 * @return array|null raw conf (name => value), or null when absent.
1311 */
1312 public static function detect_litespeed(): ?array {
1313 global $wpdb;
1314
1315 // v4+: individual `litespeed.conf.<name>` options. Pull them all and
1316 // strip the prefix so keys match what plan_litespeed() reads.
1317 // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- one-time settings-import scan of another plugin's option rows by name prefix; no WP API bulk-reads by option_name LIKE, and caching a single migration-time read is pointless.
1318 $rows = $wpdb->get_results(
1319 "SELECT option_name, option_value FROM {$wpdb->options} WHERE option_name LIKE 'litespeed.conf.%'",
1320 ARRAY_A
1321 );
1322 if ( ! empty( $rows ) ) {
1323 $conf = array();
1324 foreach ( $rows as $row ) {
1325 $name = substr( (string) $row['option_name'], strlen( 'litespeed.conf.' ) );
1326 if ( '' === $name || '_version' === $name ) {
1327 continue;
1328 }
1329 $conf[ $name ] = self::decode_litespeed_value( (string) $row['option_value'] );
1330 }
1331 if ( ! empty( $conf ) ) {
1332 return $conf;
1333 }
1334 }
1335
1336 // v3 / legacy: a single serialized array.
1337 $opt = get_option( 'litespeed.conf', null );
1338 if ( ! is_array( $opt ) ) {
1339 $opt = get_option( 'litespeed-cache-conf', null );
1340 }
1341 return is_array( $opt ) && ! empty( $opt ) ? $opt : null;
1342 }
1343
1344 /**
1345 * Decode one `litespeed.conf.*` option value.
1346 *
1347 * LiteSpeed v4+ stores its list settings as JSON strings, not
1348 * PHP-serialized arrays, so maybe_unserialize() hands the JSON straight
1349 * back as a string. plan_litespeed()'s $list() helper then splits it on
1350 * newlines — which JSON has none of — producing a ONE-element array
1351 * holding the entire blob. Every exclusion rule imported that way is
1352 * dead: the list no longer matches anything, so cart, checkout and
1353 * account pages become publicly cacheable while the import reports
1354 * success. (#217)
1355 *
1356 * Try JSON first for anything shaped like it, and fall back to
1357 * maybe_unserialize() so v3 / legacy installs keep working.
1358 */
1359 private static function decode_litespeed_value( string $raw ) {
1360 $trimmed = trim( $raw );
1361 if ( '' !== $trimmed && ( '[' === $trimmed[0] || '{' === $trimmed[0] ) ) {
1362 $decoded = json_decode( $trimmed, true );
1363 if ( JSON_ERROR_NONE === json_last_error() && is_array( $decoded ) ) {
1364 return $decoded;
1365 }
1366 }
1367 return maybe_unserialize( $raw );
1368 }
1369
1370 /**
1371 * Translate LiteSpeed's `litespeed.conf` into xSpeed module patches.
1372 * LiteSpeed uses dotted keys; values are mostly bool-ish (1/0/'1').
1373 * We map only the settings that have a clean xSpeed equivalent and
1374 * leave the rest untouched so nothing is silently mis-imported.
1375 *
1376 * @param array $r raw litespeed.conf.
1377 */
1378 public static function plan_litespeed( array $r ): array {
1379 $on = static function ( $key ) use ( $r ): bool {
1380 return isset( $r[ $key ] ) && ! empty( $r[ $key ] );
1381 };
1382 // LiteSpeed list fields are stored as either a newline-delimited
1383 // string or an array. Normalize to a clean string[] either way.
1384 $list = static function ( $key ) use ( $r ): array {
1385 $v = $r[ $key ] ?? null;
1386 if ( is_string( $v ) ) {
1387 $v = preg_split( '/\r\n|\r|\n/', $v );
1388 }
1389 if ( ! is_array( $v ) ) {
1390 return array();
1391 }
1392 return array_values( array_filter( array_map( 'trim', array_map( 'strval', $v ) ) ) );
1393 };
1394 // LiteSpeed writes a regex rule bare (`^/secret-.*`); xSpeed marks one
1395 // with a leading `~` (see CacheModule's own `~wp-.*\.php` default) and
1396 // treats anything else as a literal/glob. Imported unchanged, a
1397 // LiteSpeed regex became a literal that matches nothing — the same
1398 // silent loss of protection as the JSON bug above, just narrower. Only
1399 // rules carrying an unmistakable regex metacharacter are converted, so
1400 // a plain path like `/cart` stays the literal it already is. (#217)
1401 $to_xspeed_pattern = static function ( string $rule ): string {
1402 if ( '' === $rule || '~' === $rule[0] ) {
1403 return $rule;
1404 }
1405 return preg_match( '/[\^$|]|\.\*|\.\+|\[.+\]|\\\\[dwsb]/', $rule ) ? '~' . $rule : $rule;
1406 };
1407 $set_list = static function ( array &$dest, string $dest_key, array $vals ) use ( $to_xspeed_pattern ): void {
1408 if ( in_array( $dest_key, array( 'excluded_urls', 'excluded_patterns' ), true ) ) {
1409 $vals = array_map( $to_xspeed_pattern, $vals );
1410 }
1411 if ( $vals ) {
1412 $dest[ $dest_key ] = $vals;
1413 }
1414 };
1415
1416 $patch = array();
1417
1418 // ── Page cache ────────────────────────────────────────────────
1419 $patch['cache'] = array(
1420 'enabled' => $on( 'cache' ) || $on( 'cache-priv' ),
1421 );
1422 // See plan_wp_rocket: never import Separate Mobile Cache as ON — it
1423 // disables the device-blind static fast path. Flag for review instead.
1424 self::map_mobile_separate( $patch, $on( 'cache-mobile' ) );
1425 // TTL: LiteSpeed stores cache-ttl_pub in seconds → xSpeed wants hours.
1426 if ( isset( $r['cache-ttl_pub'] ) && (int) $r['cache-ttl_pub'] > 0 ) {
1427 $patch['cache']['cache_expiry'] = max( 1, min( 720, (int) ( (int) $r['cache-ttl_pub'] / 3600 ) ) );
1428 }
1429 // Excluded URIs / cookies / user-agents / dropped query strings.
1430 $set_list( $patch['cache'], 'excluded_urls', $list( 'cache-exc' ) );
1431 $set_list( $patch['cache'], 'excluded_cookies', $list( 'cache-exc_cookies' ) );
1432 // `cache-exc_useragents`, plural — LiteSpeed's O_CACHE_EXC_USERAGENTS.
1433 // The singular spelling matched nothing, so the list always imported
1434 // empty, and an empty field looks "not configured" rather than lost. (#217)
1435 $set_list( $patch['cache'], 'bypass_user_agents', $list( 'cache-exc_useragents' ) );
1436 // LiteSpeed "drop query string" list ≈ xSpeed ignored_query_params.
1437 $set_list( $patch['cache'], 'ignored_query_params', $list( 'cache-drop_qs' ) );
1438
1439 // ── Minify / optimization ─────────────────────────────────────
1440 $patch['minify'] = array(
1441 'minify_html' => $on( 'optm-html_min' ),
1442 'minify_css' => $on( 'optm-css_min' ),
1443 'minify_js' => $on( 'optm-js_min' ),
1444 'combine_css' => $on( 'optm-css_comb' ),
1445 'combine_js' => $on( 'optm-js_comb' ),
1446 // optm-js_defer is a THREE-WAY switch, not a boolean:
1447 // 0 = OFF, 1 = Deferred, 2 = Delayed (LiteSpeed's own UI labels,
1448 // tpl/page_optm/settings_js.tpl.php). The modes replace each other,
1449 // so 2 must set delay_js INSTEAD of defer_js — the old mapping set
1450 // both, turning one LiteSpeed choice into two xSpeed transforms
1451 // that fight each other. (#217)
1452 'defer_js' => isset( $r['optm-js_defer'] ) && 1 === (int) $r['optm-js_defer'],
1453 'delay_js' => isset( $r['optm-js_defer'] ) && 2 === (int) $r['optm-js_defer'],
1454 // Async/“load CSS asynchronously” — LiteSpeed CCSS async.
1455 'async_css' => $on( 'optm-css_async' ),
1456 // Remove query strings from static resources.
1457 'remove_query_strings' => $on( 'optm-qs_rm' ),
1458 );
1459 // Defer/delay exclusion list — merge LiteSpeed's JS defer + delay
1460 // exclude lists into xSpeed's single defer_js_excluded.
1461 // `optm-js_delay_exc` does not exist in LiteSpeed. Its delay list is
1462 // optm-js_delay_inc (O_OPTM_JS_DELAY_INC) — an INCLUDE list naming the
1463 // scripts to delay, which is xSpeed's delay_js_targets, not an
1464 // exclusion. Merging it into defer_js_excluded would have inverted the
1465 // user's intent, so it maps to its own destination below. (#217)
1466 $defer_exc = $list( 'optm-js_defer_exc' );
1467 $set_list( $patch['minify'], 'defer_js_excluded', $defer_exc );
1468 $set_list( $patch['minify'], 'delay_js_targets', $list( 'optm-js_delay_inc' ) );
1469
1470 // ── Lazy load (media) ─────────────────────────────────────────
1471 $patch['lazy'] = array(
1472 'lazy_images' => $on( 'media-lazy' ),
1473 'lazy_iframes' => $on( 'media-iframe_lazy' ),
1474 // LiteSpeed has no separate HTML5-video lazy toggle; mirror the
1475 // image setting so video preload follows the same intent.
1476 'lazy_videos' => $on( 'media-lazy' ),
1477 // "Add Missing Sizes" → add_missing_dimensions (anti-CLS).
1478 'add_missing_dimensions' => $on( 'media-add_missing_sizes' ),
1479 );
1480 $set_list( $patch['lazy'], 'excluded_images', $list( 'media-lazy_exc' ) );
1481
1482 // ── Fonts ─────────────────────────────────────────────────────
1483 // LiteSpeed "Font Display Optimization" (optm-localize_style /
1484 // optm-css_font_display) → xSpeed font-display: swap.
1485 if ( $on( 'optm-css_font_display' ) || $on( 'optm-localize' ) ) {
1486 $patch['fonts'] = array( 'font_display_swap' => true );
1487 }
1488
1489 // ── Disable bloat ─────────────────────────────────────────────
1490 // optm-emoji_rm is LiteSpeed's only bloat toggle. It used to map to
1491 // disable_oembed, which turned oEmbed off unasked and left emojis on
1492 // (#217, #532). jQuery-migrate / dashicons / XML-RPC / RSS / REST
1493 // aren't LiteSpeed-managed, so we don't guess at them.
1494 if ( $on( 'optm-emoji_rm' ) ) {
1495 $patch['bloat'] = array( 'disable_emojis' => true );
1496 }
1497
1498 // ── Browser cache (LiteSpeed: cache-browser) ──────────────────
1499 if ( $on( 'cache-browser' ) ) {
1500 $patch['browser-cache'] = array( 'enabled' => true );
1501 if ( isset( $r['cache-ttl_browser'] ) && (int) $r['cache-ttl_browser'] > 0 ) {
1502 $patch['browser-cache']['asset_ttl'] = (int) $r['cache-ttl_browser'];
1503 }
1504 }
1505
1506 // ── Object cache ──────────────────────────────────────────────
1507 if ( $on( 'object' ) ) {
1508 $kind = isset( $r['object-kind'] ) && (int) $r['object-kind'] === 1 ? 'redis' : 'memcached';
1509 $patch['object-cache'] = array( 'backend' => $kind );
1510 if ( ! empty( $r['object-host'] ) ) {
1511 $host_key = 'redis' === $kind ? 'redis_host' : 'memcached_host';
1512 $patch['object-cache'][ $host_key ] = (string) $r['object-host'];
1513 }
1514 if ( ! empty( $r['object-port'] ) ) {
1515 $port_key = 'redis' === $kind ? 'redis_port' : 'memcached_port';
1516 $patch['object-cache'][ $port_key ] = (int) $r['object-port'];
1517 }
1518 if ( 'redis' === $kind && isset( $r['object-db_id'] ) ) {
1519 $patch['object-cache']['redis_database'] = max( 0, min( 15, (int) $r['object-db_id'] ) );
1520 }
1521 if ( ! empty( $r['object-pswd'] ) && 'redis' === $kind ) {
1522 $patch['object-cache']['redis_password'] = (string) $r['object-pswd'];
1523 }
1524 if ( ! empty( $r['object-global_groups'] ) || ! empty( $r['object-persistent'] ) ) {
1525 $patch['object-cache']['persistent'] = $on( 'object-persistent' );
1526 }
1527 }
1528
1529 // ── Image conversion (Pro Images module) ──────────────────────
1530 // LiteSpeed media-webp / next-gen image generation → xSpeed Images.
1531 if ( $on( 'img_optm-webp' ) || $on( 'media-webp' ) || $on( 'img_optm-auto' ) ) {
1532 $patch['images'] = array(
1533 'webp' => $on( 'img_optm-webp' ) || $on( 'media-webp' ),
1534 'avif' => $on( 'img_optm-avif' ),
1535 );
1536 }
1537
1538 // ── CDN ───────────────────────────────────────────────────────
1539 if ( $on( 'cdn' ) ) {
1540 $cdn_url = '';
1541 if ( ! empty( $r['cdn-mapping'] ) && is_array( $r['cdn-mapping'] ) ) {
1542 $first = $r['cdn-mapping'][0] ?? array();
1543 // LiteSpeed cdn-mapping rows use the 'url' sub-key (array form)
1544 // or a bare URL string (legacy).
1545 $cdn_url = is_array( $first ) ? (string) ( $first['url'] ?? ( $first['cdn_url'] ?? '' ) ) : (string) $first;
1546 }
1547 if ( '' !== $cdn_url ) {
1548 $patch['cdn'] = array(
1549 'enabled' => true,
1550 'cdn_url' => $cdn_url,
1551 );
1552 // LiteSpeed's O_CDN_EXC is `cdn-exc`, not `cdn-exclude`. (#217)
1553 $set_list( $patch['cdn'], 'excluded_patterns', $list( 'cdn-exc' ) );
1554 }
1555 }
1556
1557 return $patch;
1558 }
1559 }
1560