| 1 |
<?php |
| 2 |
/** |
| 3 |
* WCPOS sync read surface. |
| 4 |
* |
| 5 |
* @package WCPOS\WooCommercePOS\Sync |
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*/ |
| 7 |
|
| 8 |
namespace WCPOS\WooCommercePOS\Sync; |
| 9 |
|
| 10 |
use Exception; |
| 11 |
use Ramsey\Uuid\Uuid; |
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use WC_Customer; |
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use WC_Order_Item; |
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use WCPOS\WooCommercePOS\Logger; |
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|
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// phpcs:disable Squiz.Commenting, Generic.Commenting -- Ported lab documentation is preserved verbatim. |
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// phpcs:disable WordPress.DB.PreparedSQL.NotPrepared -- Queries are prepared before execution. |
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|
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/** |
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* Uniform record identity on the server side — the sole authority that stamps, |
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* validates, deduplicates, and checks ownership of `_woocommerce_pos_uuid`. |
| 22 |
* Legacy API callers delegate here (ADR 0021, decision c). |
| 23 |
* |
| 24 |
* The client uses this uuid as the stable RxDB primary key (ADR 0008, guardrail |
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* G1): a record carries the SAME identity on the server and the client, may be |
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* born on either side, and is NEVER re-keyed. This is the server half of that |
| 27 |
* contract — a record pulled from the lab namespace arrives WITH its uuid, so the |
| 28 |
* client never has to mint a divergent one for a server-born record. Multisite |
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* customer first-stamps are serialized while adopting legacy per-blog values. |
| 30 |
* |
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* Reads an existing valid uuid from the record's meta; if absent/invalid it |
| 32 |
* generates one and PERSISTS it (so it is stable across pulls), then mirrors it |
| 33 |
* into the serialized payload's `meta_data`. Duck-typed on the WC_Data methods so |
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* it stays unit-testable without WooCommerce loaded. UUID convergence does not |
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* use an object-cache lock; sync writes are serialized by their record lock, |
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* while stamping deterministically converges duplicate meta rows. |
| 37 |
*/ |
| 38 |
class Pos_Uuid { |
| 39 |
public const META_KEY = Api::UUID_META_KEY; |
| 40 |
/** Meta key carrying the freshly-recomputed variable-product price range (P2-2). */ |
| 41 |
|
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/** |
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* A standard 8-4-4-4-12 uuid shape (any version), case-insensitive. |
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*/ |
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public static function is_uuid( $value ): bool { |
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return \is_string( $value ) |
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&& (bool) preg_match( '/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i', $value ); |
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} |
| 49 |
|
| 50 |
/** |
| 51 |
* The first VALID uuid among a record's meta entries (WC_Meta_Data objects |
| 52 |
* with ->key/->value, or arrays), or '' if none. Skips blank / invalid / a |
| 53 |
* blank duplicate in favour of a later valid one. |
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*/ |
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public static function read_valid_uuid_from_meta( array $meta_data ): string { |
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foreach ( $meta_data as $meta ) { |
| 57 |
$key = Meta_Entry::key( $meta ); |
| 58 |
if ( self::META_KEY !== $key ) { |
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continue; |
| 60 |
} |
| 61 |
$value = Meta_Entry::value( $meta ); |
| 62 |
if ( self::is_uuid( $value ) ) { |
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return $value; |
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} |
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} |
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|
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return ''; |
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} |
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|
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/** |
| 71 |
* Ensure the record carries a stable, UNIQUELY-OWNED uuid: reuse a valid |
| 72 |
* existing one, else generate + persist a new one. Returns the uuid (or '' if |
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* the object can't carry meta). Duck-typed on get_meta_data / update_meta_data |
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* / save_meta_data. |
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* |
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* $opts['collides'] is an optional callable (uuid, object) => bool: when it |
| 77 |
* reports the existing uuid is already owned by ANOTHER record (a clone/import |
| 78 |
* that copied the meta), we treat it as needing a fresh one rather than serving |
| 79 |
* a duplicate RxDB key. Injected so the branching stays unit-testable; the live |
| 80 |
* wiring uses the $wpdb-backed self::uuid_owned_by_other. |
| 81 |
* |
| 82 |
* @param mixed $object |
| 83 |
*/ |
| 84 |
public static function ensure_uuid( $object, array $opts = array() ): string { |
| 85 |
if ( ! \is_object( $object ) || ! method_exists( $object, 'get_meta_data' ) ) { |
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return ''; |
| 87 |
} |
| 88 |
if ( |
| 89 |
$object instanceof WC_Customer |
| 90 |
&& \function_exists( 'is_multisite' ) |
| 91 |
&& is_multisite() |
| 92 |
&& '' === self::read_valid_uuid_from_meta( (array) $object->get_meta_data() ) |
| 93 |
) { |
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return self::ensure_multisite_customer_uuid( $object, $opts ); |
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} |
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|
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return self::ensure_uuid_without_user_lock( $object, $opts ); |
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} |
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|
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/** |
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* Ensure a UUID after any customer-specific coordination has completed. |
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* |
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* @param mixed $object |
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*/ |
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private static function ensure_uuid_without_user_lock( $object, array $opts ): string { |
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$collides = $opts['collides'] ?? null; |
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$persist = $opts['persist'] ?? true; |
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$existing = self::read_valid_uuid_from_meta( (array) $object->get_meta_data() ); |
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if ( '' !== $existing && ! ( \is_callable( $collides ) && $collides( $existing, $object ) ) ) { |
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// Converge any duplicate uuid metas (e.g. a concurrent first-stamp) to |
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// the single canonical value — deterministic regardless of object-cache |
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// backend, so no cross-request lock is required for correctness. |
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self::prune_duplicate_uuid_meta( $object, $persist ); |
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|
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return $existing; |
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} |
| 117 |
if ( ! method_exists( $object, 'update_meta_data' ) ) { |
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return ''; |
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} |
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// Minting persists by default: a freshly-generated uuid that isn't written |
| 121 |
// back would differ on the next pull, making identity unstable — worse than |
| 122 |
// none. persist:false is for a BEFORE-save hook, where the in-progress save |
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// writes the meta, so we add it but skip a redundant second save. |
| 124 |
if ( $persist && ! method_exists( $object, 'save_meta_data' ) ) { |
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return ''; |
| 126 |
} |
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$uuid = self::generate_uuid(); |
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$object->update_meta_data( self::META_KEY, $uuid ); |
| 129 |
if ( $persist ) { |
| 130 |
call_user_func( array( $object, 'save_meta_data' ) ); |
| 131 |
// A concurrent first-stamp may have persisted its own uuid between our |
| 132 |
// read and save. Re-read and converge on the first-valid row so every |
| 133 |
// racer returns the SAME winner instead of each serving its own mint. |
| 134 |
if ( $object instanceof \WC_Data ) { |
| 135 |
$object->read_meta_data( true ); |
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self::prune_duplicate_uuid_meta( $object, true ); |
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$stored = self::read_valid_uuid_from_meta( (array) $object->get_meta_data() ); |
| 138 |
if ( self::is_uuid( $stored ) ) { |
| 139 |
return $stored; |
| 140 |
} |
| 141 |
} |
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} |
| 143 |
|
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return $uuid; |
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} |
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|
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/** |
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* Legacy WP_User adapter for the shared WC_Data identity path (ADR 0021). |
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* |
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* @param mixed $user WP_User-like object or numeric user id. |
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*/ |
| 152 |
public static function ensure_user_uuid( $user ): string { |
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$user_id = \is_object( $user ) && isset( $user->ID ) ? (int) $user->ID : (int) $user; |
| 154 |
if ( $user_id <= 0 || ! class_exists( WC_Customer::class ) ) { |
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return ''; |
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} |
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|
| 158 |
try { |
| 159 |
$customer = new WC_Customer( $user_id ); |
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} catch ( Exception $e ) { |
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Logger::log( 'Unable to load customer for UUID stamping: ' . $e->getMessage() ); |
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return ''; |
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} |
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|
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if ( ! method_exists( $customer, 'get_id' ) || $user_id !== (int) $customer->get_id() ) { |
| 166 |
return ''; |
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} |
| 168 |
|
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return self::ensure_uuid( |
| 170 |
$customer, |
| 171 |
array( 'collides' => array( __CLASS__, 'uuid_owned_by_other_user' ) ) |
| 172 |
); |
| 173 |
} |
| 174 |
|
| 175 |
/** |
| 176 |
* Ensure the WC_Order_Item has a valid UUID. |
| 177 |
* |
| 178 |
* @param WC_Order_Item $item The order item object. |
| 179 |
* @return void |
| 180 |
*/ |
| 181 |
public static function ensure_order_item_uuid( WC_Order_Item $item ): void { |
| 182 |
global $wpdb; |
| 183 |
|
| 184 |
if ( self::is_uuid( $item->get_meta( self::META_KEY ) ) ) { |
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return; |
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} |
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|
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$lock_key = 'wc_pos_uuid_order_item_' . $item->get_id(); |
| 189 |
$acquired = $wpdb->get_var( $wpdb->prepare( 'SELECT GET_LOCK(%s, %d)', $lock_key, 10 ) ); |
| 190 |
if ( '1' !== (string) $acquired ) { |
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Logger::log( 'Unable to acquire lock for order item UUID update for order item id ' . $item->get_id() ); |
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return; |
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} |
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try { |
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// Persist any pending meta, then check the STORED uuid directly — |
| 196 |
// a full read_meta_data(true) reload would clobber sibling in-memory |
| 197 |
// meta on lanes where the datastore cache lags (HPOS misc `_sku`). |
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$item->save_meta_data(); |
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$uuid = wc_get_order_item_meta( $item->get_id(), self::META_KEY, true ); |
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if ( ! self::is_uuid( $uuid ) ) { |
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$uuid = Uuid::uuid4()->toString(); |
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$item->update_meta_data( self::META_KEY, $uuid ); |
| 203 |
$item->save_meta_data(); |
| 204 |
} elseif ( $uuid !== $item->get_meta( self::META_KEY ) ) { |
| 205 |
// A concurrent request minted first; converge the stale in-memory |
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// item on the stored winner so the served payload carries it. |
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$item->update_meta_data( self::META_KEY, $uuid ); |
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} |
| 209 |
} finally { |
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$wpdb->get_var( $wpdb->prepare( 'SELECT RELEASE_LOCK(%s)', $lock_key ) ); |
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} |
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} |
| 213 |
|
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/** |
| 215 |
* Promote a legacy per-blog cashier uuid to the network-wide key. |
| 216 |
* |
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* Before identity consolidated here, the cashier endpoint minted |
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* `_woocommerce_pos_uuid_{blog_id}` on multisite while every other reader used |
| 219 |
* the plain network-wide key — forking one user into two RxDB identities. When |
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* the plain key holds no valid uuid yet, adopt the current blog's legacy value |
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* so existing multisite cashiers keep their identity regardless of which |
| 222 |
* endpoint reads them first. An existing valid plain uuid wins, because it is |
| 223 |
* what /customers has already served to clients. Legacy rows are left in place |
| 224 |
* (harmless, rollback-safe). A legacy value owned by ANOTHER user — under the |
| 225 |
* network key or the current blog's legacy key — is never adopted: the first |
| 226 |
* reader must not claim a shared legacy uuid as their network identity |
| 227 |
* (#1465). When two users share the same legacy value, neither adopts it and |
| 228 |
* both are minted fresh; the 1.10.0 migration resolves the ambiguity for |
| 229 |
* users it reaches first. |
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* |
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* @param WC_Customer $customer Customer being stamped. |
| 232 |
*/ |
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private static function adopt_legacy_multisite_user_uuid( WC_Customer $customer ): void { |
| 234 |
$existing = self::read_valid_uuid_from_meta( (array) $customer->get_meta_data() ); |
| 235 |
if ( self::is_uuid( $existing ) ) { |
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return; |
| 237 |
} |
| 238 |
|
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$user_id = (int) $customer->get_id(); |
| 240 |
$legacy = get_user_meta( $user_id, self::META_KEY . '_' . get_current_blog_id(), true ); |
| 241 |
if ( self::is_uuid( $legacy ) && ! self::legacy_uuid_owned_by_other_user( $legacy, $customer ) ) { |
| 242 |
// Never clobber a uuid another request persisted concurrently — its |
| 243 |
// client is already keyed on it. A unique add when no row exists; a |
| 244 |
// compare-and-swap against the OBSERVED invalid value otherwise, so a |
| 245 |
// lock-timeout fallback that replaced the corrupt row between our |
| 246 |
// read and this write survives (the CAS no-ops and ensure_uuid then |
| 247 |
// serves the concurrent winner). |
| 248 |
$stored_rows = get_user_meta( $user_id, self::META_KEY, false ); |
| 249 |
if ( array() === $stored_rows ) { |
| 250 |
add_user_meta( $user_id, self::META_KEY, $legacy, true ); |
| 251 |
} elseif ( ! self::is_uuid( $stored_rows[0] ) ) { |
| 252 |
update_user_meta( $user_id, self::META_KEY, $legacy, $stored_rows[0] ); |
| 253 |
} |
| 254 |
} |
| 255 |
} |
| 256 |
|
| 257 |
/** |
| 258 |
* Serialize first-stamp and legacy adoption for one multisite customer. |
| 259 |
*/ |
| 260 |
private static function ensure_multisite_customer_uuid( WC_Customer $customer, array $opts ): string { |
| 261 |
global $wpdb; |
| 262 |
|
| 263 |
$user_id = (int) $customer->get_id(); |
| 264 |
$lock_name = 'wcpos_user_uuid_' . $user_id; |
| 265 |
$acquired = $wpdb->get_var( $wpdb->prepare( 'SELECT GET_LOCK(%s, %d)', $lock_name, 5 ) ); |
| 266 |
if ( '1' !== (string) $acquired ) { |
| 267 |
// The lock holder is (or was) stamping this user. This uuid is the |
| 268 |
// client's RxDB primary key, so never serve '' — and when a legacy |
| 269 |
// identity may be mid-adoption, serve it read-only rather than writing |
| 270 |
// anything that would pre-empt the adoption and fork the user. |
| 271 |
$customer->read_meta_data( true ); |
| 272 |
$persisted = self::read_valid_uuid_from_meta( (array) $customer->get_meta_data() ); |
| 273 |
if ( self::is_uuid( $persisted ) ) { |
| 274 |
return $persisted; |
| 275 |
} |
| 276 |
|
| 277 |
// An adoptable legacy uuid is what the holder will promote — serve the |
| 278 |
// same value read-only so this response and the adoption agree. |
| 279 |
$legacy = get_user_meta( $user_id, self::META_KEY . '_' . get_current_blog_id(), true ); |
| 280 |
if ( self::is_uuid( $legacy ) && ! self::legacy_uuid_owned_by_other_user( $legacy, $customer ) ) { |
| 281 |
return $legacy; |
| 282 |
} |
| 283 |
|
| 284 |
// First stamp under contention: persist a fallback without clobbering a |
| 285 |
// concurrent winner — a unique add when no row exists, a compare-and-swap |
| 286 |
// against the (invalid) first row otherwise — then serve whichever row |
| 287 |
// stuck so every racer converges on one persisted identity. |
| 288 |
$fallback = self::generate_uuid(); |
| 289 |
$stored_rows = get_user_meta( $user_id, self::META_KEY, false ); |
| 290 |
if ( array() === $stored_rows ) { |
| 291 |
add_user_meta( $user_id, self::META_KEY, $fallback, true ); |
| 292 |
} elseif ( ! self::is_uuid( $stored_rows[0] ) ) { |
| 293 |
update_user_meta( $user_id, self::META_KEY, $fallback, $stored_rows[0] ); |
| 294 |
} |
| 295 |
$stored = get_user_meta( $user_id, self::META_KEY, true ); |
| 296 |
|
| 297 |
return self::is_uuid( $stored ) ? $stored : $fallback; |
| 298 |
} |
| 299 |
|
| 300 |
try { |
| 301 |
$customer->read_meta_data( true ); |
| 302 |
self::adopt_legacy_multisite_user_uuid( $customer ); |
| 303 |
$customer->read_meta_data( true ); |
| 304 |
|
| 305 |
return self::ensure_uuid_without_user_lock( $customer, $opts ); |
| 306 |
} finally { |
| 307 |
$wpdb->get_var( $wpdb->prepare( 'SELECT RELEASE_LOCK(%s)', $lock_name ) ); |
| 308 |
} |
| 309 |
} |
| 310 |
|
| 311 |
/** |
| 312 |
* Legacy WP_Term adapter for the shared identity path (ADR 0021). |
| 313 |
* |
| 314 |
* @param mixed $term WP_Term-like object or numeric term id. |
| 315 |
*/ |
| 316 |
public static function ensure_term_uuid( $term ): string { |
| 317 |
$term_id = \is_object( $term ) && isset( $term->term_id ) ? (int) $term->term_id : (int) $term; |
| 318 |
if ( $term_id <= 0 ) { |
| 319 |
return ''; |
| 320 |
} |
| 321 |
|
| 322 |
$adapter = new Term_Meta_Adapter( $term_id ); |
| 323 |
|
| 324 |
return self::ensure_uuid( |
| 325 |
$adapter, |
| 326 |
array( 'collides' => array( __CLASS__, 'uuid_owned_by_other_term' ) ) |
| 327 |
); |
| 328 |
} |
| 329 |
|
| 330 |
/** |
| 331 |
* Return a copy of the SERIALIZED payload whose `meta_data` mirrors `$uuid` |
| 332 |
* exactly once (entries here are arrays: ['id'=>,'key'=>,'value'=>]). Drops |
| 333 |
* blank / duplicate / mismatched `_woocommerce_pos_uuid` entries so the served |
| 334 |
* record always carries one canonical identity. |
| 335 |
*/ |
| 336 |
public static function ensure_in_payload( array $payload, string $uuid ): array { |
| 337 |
$meta = ( isset( $payload['meta_data'] ) && \is_array( $payload['meta_data'] ) ) ? $payload['meta_data'] : array(); |
| 338 |
$others = array(); |
| 339 |
foreach ( $meta as $entry ) { |
| 340 |
$key = Meta_Entry::key( $entry ); |
| 341 |
if ( self::META_KEY !== $key ) { |
| 342 |
$others[] = $entry; |
| 343 |
} |
| 344 |
} |
| 345 |
$others[] = array( |
| 346 |
'key' => self::META_KEY, |
| 347 |
'value' => $uuid, |
| 348 |
); |
| 349 |
$payload['meta_data'] = array_values( $others ); |
| 350 |
|
| 351 |
return $payload; |
| 352 |
} |
| 353 |
|
| 354 |
/** |
| 355 |
* Hook for the per-collection `woocommerce_pos_sync_serialized_*` filters (product, |
| 356 |
* order, …): stamp the served record's stable uuid (persisting a new one if |
| 357 |
* needed) and mirror it into the payload, so EVERY read carries the identity the |
| 358 |
* client keys on — regardless of how the record was born. A non-array payload or |
| 359 |
* an object that can't carry meta passes through unchanged. |
| 360 |
* |
| 361 |
* Collection-agnostic: `ensure_uuid` only needs the WC_Data meta API |
| 362 |
* (get/update/save_meta_data), which orders (HPOS-safe), customers, and terms all |
| 363 |
* provide. Collision detection IS storage-specific: orders live in HPOS tables |
| 364 |
* (not `wp_postmeta`), so they get the order-aware detector; products/variations |
| 365 |
* keep the post-scoped one. Customers and terms use their storage-specific |
| 366 |
* adapters and detectors. |
| 367 |
* |
| 368 |
* @param mixed $payload |
| 369 |
* @param mixed $object |
| 370 |
* @param null|mixed $request |
| 371 |
*/ |
| 372 |
public static function stamp_serialized_record( $payload, $object, $request = null ) { |
| 373 |
if ( ! \is_array( $payload ) ) { |
| 374 |
return $payload; |
| 375 |
} |
| 376 |
$collides = is_a( $object, 'WC_Abstract_Order' ) |
| 377 |
? array( __CLASS__, 'uuid_owned_by_other_order' ) |
| 378 |
: array( __CLASS__, 'uuid_owned_by_other' ); |
| 379 |
$uuid = self::ensure_uuid( $object, array( 'collides' => $collides ) ); |
| 380 |
|
| 381 |
return '' === $uuid ? $payload : self::ensure_in_payload( $payload, $uuid ); |
| 382 |
} |
| 383 |
|
| 384 |
/** |
| 385 |
* Order-aware variant of {@see uuid_owned_by_other}. HPOS order meta does NOT live |
| 386 |
* in `wp_postmeta`, so the post-scoped detector can't see an order that already owns |
| 387 |
* `$uuid` — a duplicated/imported order with a copied uuid would slip through and two |
| 388 |
* orders would share one RxDB key. Query the orders store (HPOS-safe via |
| 389 |
* `wc_get_orders`) for the uuid; a match on a DIFFERENT order id is a real collision. |
| 390 |
* |
| 391 |
* @param mixed $uuid |
| 392 |
* @param mixed $object |
| 393 |
*/ |
| 394 |
public static function uuid_owned_by_other_order( $uuid, $object ): bool { |
| 395 |
if ( ! \is_object( $object ) || ! method_exists( $object, 'get_id' ) || ! \function_exists( 'wc_get_orders' ) ) { |
| 396 |
return false; |
| 397 |
} |
| 398 |
$order_id = (int) $object->get_id(); |
| 399 |
foreach ( self::get_order_ids_by_uuid( (string) $uuid ) as $other_id ) { |
| 400 |
if ( (int) $other_id !== $order_id ) { |
| 401 |
return true; |
| 402 |
} |
| 403 |
} |
| 404 |
|
| 405 |
return false; |
| 406 |
} |
| 407 |
|
| 408 |
/** |
| 409 |
* Return at most two order ids carrying a UUID. The legacy create controller |
| 410 |
* treats two results as an ambiguous identity and fails closed. |
| 411 |
* |
| 412 |
* Datastore-aware direct meta lookup: under HPOS the uuid lives in |
| 413 |
* `wc_orders_meta`, otherwise in `wp_postmeta`. `wc_get_orders()` with a |
| 414 |
* `meta_query` is NOT supported on the CPT order datastore (it fires a |
| 415 |
* `doing_it_wrong` and returns unfiltered results), so we query the meta table |
| 416 |
* directly — the same shape the plugin's other order-uuid lookups use. |
| 417 |
*/ |
| 418 |
public static function get_order_ids_by_uuid( string $uuid ): array { |
| 419 |
global $wpdb; |
| 420 |
if ( ! isset( $wpdb ) ) { |
| 421 |
return array(); |
| 422 |
} |
| 423 |
|
| 424 |
$order_util = '\\Automattic\\WooCommerce\\Utilities\\OrderUtil'; |
| 425 |
$hpos = class_exists( $order_util ) |
| 426 |
&& method_exists( $order_util, 'custom_orders_table_usage_is_enabled' ) |
| 427 |
&& call_user_func( array( $order_util, 'custom_orders_table_usage_is_enabled' ) ); |
| 428 |
|
| 429 |
if ( $hpos ) { |
| 430 |
$ids = $wpdb->get_col( |
| 431 |
$wpdb->prepare( |
| 432 |
"SELECT DISTINCT m.order_id FROM {$wpdb->prefix}wc_orders_meta m" |
| 433 |
. " JOIN {$wpdb->prefix}wc_orders o ON o.id = m.order_id AND o.type = 'shop_order'" |
| 434 |
. ' WHERE m.meta_key = %s AND m.meta_value = %s' |
| 435 |
. " AND o.status NOT IN ('trash','auto-draft')" |
| 436 |
. ' ORDER BY m.order_id ASC LIMIT 2', |
| 437 |
self::META_KEY, |
| 438 |
$uuid |
| 439 |
) |
| 440 |
); |
| 441 |
} else { |
| 442 |
$ids = $wpdb->get_col( |
| 443 |
$wpdb->prepare( |
| 444 |
"SELECT DISTINCT m.post_id FROM {$wpdb->postmeta} m" |
| 445 |
. " JOIN {$wpdb->posts} p ON p.ID = m.post_id AND p.post_type = 'shop_order'" |
| 446 |
. ' WHERE m.meta_key = %s AND m.meta_value = %s' |
| 447 |
. " AND p.post_status NOT IN ('trash','auto-draft')" |
| 448 |
. ' ORDER BY m.post_id ASC LIMIT 2', |
| 449 |
self::META_KEY, |
| 450 |
$uuid |
| 451 |
) |
| 452 |
); |
| 453 |
} |
| 454 |
|
| 455 |
return \is_array( $ids ) ? array_values( $ids ) : array(); |
| 456 |
} |
| 457 |
|
| 458 |
/** |
| 459 |
* Register WRITE-time stamping: a record gets its uuid the moment it is saved, |
| 460 |
* so every read path (catalog proxy, change-signal hydration) then serves it |
| 461 |
* straight from postmeta with no per-path stamping copy. Hooked BEFORE the data |
| 462 |
* store writes, so the uuid lands in the SAME save — no second write, no |
| 463 |
* change-log cascade, and no concurrent-first-READ race (stamping is per-save, |
| 464 |
* not per-reader). The read-time filter remains as a fallback for records that |
| 465 |
* predate these hooks until the backfill runs. |
| 466 |
*/ |
| 467 |
public static function register_hooks(): void { |
| 468 |
if ( ! \function_exists( 'add_action' ) ) { |
| 469 |
return; |
| 470 |
} |
| 471 |
add_action( 'woocommerce_before_product_object_save', array( __CLASS__, 'stamp_on_save' ), 10, 1 ); |
| 472 |
add_action( 'woocommerce_before_product_variation_object_save', array( __CLASS__, 'stamp_on_save' ), 10, 1 ); |
| 473 |
} |
| 474 |
|
| 475 |
/** |
| 476 |
* Before-save hook: ensure the WC object carries a unique uuid as part of the |
| 477 |
* in-progress save (persist:false — the save itself writes it). |
| 478 |
* |
| 479 |
* @param mixed $object |
| 480 |
*/ |
| 481 |
public static function stamp_on_save( $object ): void { |
| 482 |
self::ensure_uuid( |
| 483 |
$object, |
| 484 |
array( |
| 485 |
'collides' => array( __CLASS__, 'uuid_owned_by_other' ), |
| 486 |
'persist' => false, |
| 487 |
) |
| 488 |
); |
| 489 |
} |
| 490 |
|
| 491 |
/** |
| 492 |
* True when $uuid is already stored as `_woocommerce_pos_uuid` on a DIFFERENT |
| 493 |
* post (a cloned/imported record that copied the meta). Post-scoped (products |
| 494 |
* + variations); terms/customers live in their own meta tables and get their |
| 495 |
* own detector when those seams land. Returns false when $wpdb or the object's |
| 496 |
* id is unavailable (e.g. unit tests inject a fake detector instead). |
| 497 |
* |
| 498 |
* @param mixed $uuid |
| 499 |
* @param mixed $object |
| 500 |
*/ |
| 501 |
public static function uuid_owned_by_other( $uuid, $object ): bool { |
| 502 |
global $wpdb; |
| 503 |
if ( ! isset( $wpdb ) || ! \is_object( $object ) || ! method_exists( $object, 'get_id' ) ) { |
| 504 |
return false; |
| 505 |
} |
| 506 |
// Only an ACTIVE post counts as a live owner — a trashed/auto-draft record |
| 507 |
// sharing the uuid is not a real collision (it will never be served), so it |
| 508 |
// must not force a needless regeneration on the active record. |
| 509 |
$sql = $wpdb->prepare( |
| 510 |
"SELECT COUNT(*) FROM {$wpdb->postmeta} m |
| 511 |
JOIN {$wpdb->posts} p ON p.ID = m.post_id |
| 512 |
WHERE m.meta_key = %s AND m.meta_value = %s AND m.post_id <> %d |
| 513 |
AND p.post_status NOT IN ('trash','auto-draft')", |
| 514 |
self::META_KEY, |
| 515 |
$uuid, |
| 516 |
(int) $object->get_id() |
| 517 |
); |
| 518 |
|
| 519 |
return (int) $wpdb->get_var( $sql ) > 0; |
| 520 |
} |
| 521 |
|
| 522 |
/** |
| 523 |
* User-table twin of uuid_owned_by_other for CUSTOMERS (WC_Customer over |
| 524 |
* wp_usermeta). DELIBERATE asymmetry: WP users have no post_status / trash, so |
| 525 |
* every user row carrying the uuid is a live owner — there is NO status |
| 526 |
* exclusion (a status filter here would reference a non-existent column). |
| 527 |
* |
| 528 |
* @param mixed $uuid |
| 529 |
* @param mixed $object |
| 530 |
*/ |
| 531 |
public static function uuid_owned_by_other_user( $uuid, $object ): bool { |
| 532 |
global $wpdb; |
| 533 |
if ( ! isset( $wpdb ) || ! \is_object( $object ) || ! method_exists( $object, 'get_id' ) ) { |
| 534 |
return false; |
| 535 |
} |
| 536 |
$sql = $wpdb->prepare( |
| 537 |
"SELECT COUNT(*) FROM {$wpdb->usermeta} m |
| 538 |
JOIN {$wpdb->users} u ON u.ID = m.user_id |
| 539 |
WHERE m.meta_key = %s AND m.meta_value = %s AND m.user_id <> %d", |
| 540 |
self::META_KEY, |
| 541 |
$uuid, |
| 542 |
(int) $object->get_id() |
| 543 |
); |
| 544 |
|
| 545 |
return (int) $wpdb->get_var( $sql ) > 0; |
| 546 |
} |
| 547 |
|
| 548 |
/** |
| 549 |
* Adoption-gate twin of uuid_owned_by_other_user(): also checks the CURRENT |
| 550 |
* blog's legacy per-blog key (`_woocommerce_pos_uuid_{blog}`), because a |
| 551 |
* value another user still holds under that legacy key is the same RxDB |
| 552 |
* primary key, and adopting it would fork that user's identity (#1465). |
| 553 |
* |
| 554 |
* Deliberately NOT used for the live-identity collision check: a stale |
| 555 |
* duplicated legacy row must never discard an already-served network uuid, |
| 556 |
* so `collides` stays scoped to the network key. |
| 557 |
* |
| 558 |
* @param mixed $uuid Candidate legacy uuid. |
| 559 |
* @param WC_Customer $customer Customer being stamped. |
| 560 |
*/ |
| 561 |
private static function legacy_uuid_owned_by_other_user( $uuid, WC_Customer $customer ): bool { |
| 562 |
global $wpdb; |
| 563 |
if ( self::uuid_owned_by_other_user( $uuid, $customer ) ) { |
| 564 |
return true; |
| 565 |
} |
| 566 |
if ( ! isset( $wpdb ) ) { |
| 567 |
return false; |
| 568 |
} |
| 569 |
$sql = $wpdb->prepare( |
| 570 |
"SELECT COUNT(*) FROM {$wpdb->usermeta} m |
| 571 |
JOIN {$wpdb->users} u ON u.ID = m.user_id |
| 572 |
WHERE m.meta_key = %s AND m.meta_value = %s AND m.user_id <> %d", |
| 573 |
self::META_KEY . '_' . get_current_blog_id(), |
| 574 |
$uuid, |
| 575 |
(int) $customer->get_id() |
| 576 |
); |
| 577 |
|
| 578 |
return (int) $wpdb->get_var( $sql ) > 0; |
| 579 |
} |
| 580 |
|
| 581 |
/** |
| 582 |
* Term-table twin for CATEGORIES + BRANDS. CROSS-TAXONOMY by design: product_cat |
| 583 |
* and product_brand SHARE wp_termmeta, so a uuid on a different term in EITHER |
| 584 |
* taxonomy is a real RxDB-primary-key clash — match on term_id across ALL |
| 585 |
* taxonomies (NO taxonomy scoping). Terms have no trash/status, so no status |
| 586 |
* exclusion (like users, unlike posts). |
| 587 |
* |
| 588 |
* @param mixed $uuid |
| 589 |
* @param mixed $object |
| 590 |
*/ |
| 591 |
public static function uuid_owned_by_other_term( $uuid, $object ): bool { |
| 592 |
global $wpdb; |
| 593 |
if ( ! isset( $wpdb ) || ! \is_object( $object ) || ! method_exists( $object, 'get_id' ) ) { |
| 594 |
return false; |
| 595 |
} |
| 596 |
$sql = $wpdb->prepare( |
| 597 |
"SELECT COUNT(*) FROM {$wpdb->termmeta} WHERE meta_key = %s AND meta_value = %s AND term_id <> %d", |
| 598 |
self::META_KEY, |
| 599 |
$uuid, |
| 600 |
(int) $object->get_id() |
| 601 |
); |
| 602 |
|
| 603 |
return (int) $wpdb->get_var( $sql ) > 0; |
| 604 |
} |
| 605 |
|
| 606 |
/** |
| 607 |
* A v4 uuid — `wp_generate_uuid4()` under WordPress, else a local fallback. |
| 608 |
*/ |
| 609 |
public static function generate_uuid(): string { |
| 610 |
if ( \function_exists( 'wp_generate_uuid4' ) ) { |
| 611 |
return wp_generate_uuid4(); |
| 612 |
} |
| 613 |
$data = random_bytes( 16 ); |
| 614 |
$data[6] = \chr( ( \ord( $data[6] ) & 0x0f ) | 0x40 ); // version 4 |
| 615 |
$data[8] = \chr( ( \ord( $data[8] ) & 0x3f ) | 0x80 ); // variant 10xx |
| 616 |
|
| 617 |
return vsprintf( '%s%s-%s-%s-%s-%s%s%s', str_split( bin2hex( $data ), 4 ) ); |
| 618 |
} |
| 619 |
|
| 620 |
/** |
| 621 |
* Collapse duplicate `_woocommerce_pos_uuid` metas to ONE canonical entry — |
| 622 |
* keep the first valid uuid, delete every other uuid meta (a concurrent-stamp |
| 623 |
* duplicate, or a blank/invalid straggler). Only persisted metas (with a meta |
| 624 |
* id) are deleted; a freshly-added unsaved one is left for the in-progress save. |
| 625 |
* When $persist, the cleanup is saved immediately; otherwise the ongoing save |
| 626 |
* (before-save hook) applies the deletions. Mirrors production's dedup, and is |
| 627 |
* what makes the concurrent-first-stamp outcome correct without a lock. |
| 628 |
* |
| 629 |
* @param mixed $object |
| 630 |
*/ |
| 631 |
private static function prune_duplicate_uuid_meta( $object, bool $persist ): void { |
| 632 |
if ( ! \is_object( $object ) || ! method_exists( $object, 'get_meta_data' ) || ! method_exists( $object, 'delete_meta_data_by_mid' ) ) { |
| 633 |
return; |
| 634 |
} |
| 635 |
$kept_valid = false; |
| 636 |
$deleted = false; |
| 637 |
foreach ( (array) $object->get_meta_data() as $meta ) { |
| 638 |
if ( ! \is_object( $meta ) || self::META_KEY !== Meta_Entry::key( $meta ) ) { |
| 639 |
continue; |
| 640 |
} |
| 641 |
if ( ! $kept_valid && self::is_uuid( Meta_Entry::value( $meta ) ) ) { |
| 642 |
$kept_valid = true; // keep the first valid uuid meta |
| 643 |
|
| 644 |
continue; |
| 645 |
} |
| 646 |
$mid = $meta->id ?? null; |
| 647 |
if ( null !== $mid ) { |
| 648 |
$object->delete_meta_data_by_mid( $mid ); |
| 649 |
$deleted = true; |
| 650 |
} |
| 651 |
} |
| 652 |
if ( $deleted && $persist && method_exists( $object, 'save_meta_data' ) ) { |
| 653 |
$object->save_meta_data(); |
| 654 |
} |
| 655 |
} |
| 656 |
} |
| 657 |
|
