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get_emails_by_id(); foreach ( $eligible as $row ) { try { $post_id = (int) $row->ID; $email_id = (string) $posts_manager->get_email_type_from_post_id( $post_id ); if ( '' === $email_id || ! isset( $registry[ $email_id ] ) ) { continue; } $email = $emails_by_id[ $email_id ] ?? null; if ( ! $email instanceof \WC_Email ) { continue; } $canonical_post_content = WCTransactionalEmailPostsGenerator::compute_canonical_post_content( $email ); $current_core_hash = sha1( $canonical_post_content ); $case_id = self::classify( $row, $current_core_hash ); self::apply_case_to_post( $post_id, $case_id, $canonical_post_content, $current_core_hash, $email ); } catch ( \Throwable $e ) { self::get_logger()->error( sprintf( 'Email template sync backfill failed for post %d: %s', (int) $row->ID, $e->getMessage() ), array( 'post_id' => (int) $row->ID, 'context' => 'email_template_sync_backfill', ) ); continue; }//end try }//end foreach self::finalize(); return false; } /** * Whether the backfill is currently rewriting post content. * * Future save_post listeners that differentiate merchant edits from * system-initiated writes should consult this flag. * * @return bool * * @since 10.8.0 */ public static function is_backfilling(): bool { return self::$is_backfilling; } /** * Override the logger implementation. Intended for tests only. * * @internal * * @param Email_Editor_Logger_Interface|null $logger The logger implementation, or null to restore the default. */ public static function set_logger( ?Email_Editor_Logger_Interface $logger ): void { self::$logger = $logger; } /** * Classify a post into one of the three backfill cases. * * Pure function: given identical inputs, always returns the same case. * * @param \stdClass $row Row with `post_content`, `post_date`, * `post_modified`, `post_date_gmt`, * `post_modified_gmt`. * @param string $current_core_hash `sha1()` of the canonical core render for the post's email. * @return string One of self::CASE_A, self::CASE_B, self::CASE_C. */ private static function classify( \stdClass $row, string $current_core_hash ): string { $current_post_hash = sha1( (string) ( $row->post_content ?? '' ) ); if ( $current_post_hash === $current_core_hash ) { return self::CASE_A; } return self::was_never_edited( $row ) ? self::CASE_B : self::CASE_C; } /** * Decide whether a row represents a post that has never been edited since * creation, using the timestamp pair available. * * Returns true when *either* the GMT pair or the local pair compare equal. * The OR makes the classifier resilient to legacy insert paths that left * one pair blank or sentinel-valued, which is the common case we've * observed in the wild. * * Known limitation: when *both* pairs independently compare equal for * reasons unrelated to edit state (e.g. both `_gmt` columns are the * `'0000-00-00 00:00:00'` sentinel *and* the local pair happens to match), * the function can report "never edited" for a post that has in fact been * edited, which would cause Case B to rewrite the merchant's content. We * accept that trade-off because the population of rows where every * timestamp pair is simultaneously corrupt is effectively empty in * practice; the simpler predicate is worth the theoretical exposure. * * @param \stdClass $row Row with `post_date`, `post_modified`, `post_date_gmt`, `post_modified_gmt`. * @return bool True if at least one timestamp pair matches. */ private static function was_never_edited( \stdClass $row ): bool { $post_date_gmt = (string) ( $row->post_date_gmt ?? '' ); $post_modified_gmt = (string) ( $row->post_modified_gmt ?? '' ); $post_date = (string) ( $row->post_date ?? '' ); $post_modified = (string) ( $row->post_modified ?? '' ); return $post_date_gmt === $post_modified_gmt || $post_date === $post_modified; } /** * Apply the chosen case to the post: rewrite content for Case B, then stamp * the four sync meta keys plus the initial status. * * All case-specific branching is confined to this method; callers only * need to pass the pre-computed canonical content and core hash. * * @param int $post_id The target post ID. * @param string $case_id One of self::CASE_A/B/C. * @param string $canonical_post_content The canonical core render (used by Case B). * @param string $current_core_hash `sha1( $canonical_post_content )`. * @param \WC_Email $email The registered email instance (used to resolve template path for the version stamp). */ private static function apply_case_to_post( int $post_id, string $case_id, string $canonical_post_content, string $current_core_hash, \WC_Email $email ): void { $version = self::resolve_version_for_email( $email ); $status_for_stamp = self::status_for_case( $case_id ); if ( self::CASE_B === $case_id ) { self::$is_backfilling = true; try { $updated = wp_update_post( array( 'ID' => $post_id, 'post_content' => $canonical_post_content, ), true ); } finally { self::$is_backfilling = false; } // With `$wp_error = true`, every `wp_update_post()` / `wp_insert_post()` // failure path returns `WP_Error` (the `0` return is reserved for the // `$wp_error = false` path). The outer `\Throwable` catch in `run()` // can't see a returned `WP_Error`, so we handle it here. This // migration is one-shot (the `woocommerce_db_version` fence flips on // completion), so an unstamped post would be orphaned — the detector // skips posts without a source hash with a recurring warning. Instead, // fall back to Case C semantics: stamp with the canonical hash but // flag the post as `core_updated_customized` so it surfaces for // merchant review. if ( is_wp_error( $updated ) ) { $status_for_stamp = WCEmailTemplateDivergenceDetector::STATUS_CORE_UPDATED_CUSTOMIZED; self::get_logger()->warning( sprintf( 'Email template sync backfill: Case B content rewrite failed for post %d (%s); stamping as core_updated_customized so the post surfaces for merchant review.', $post_id, $updated->get_error_message() ), array( 'post_id' => $post_id, 'context' => 'email_template_sync_backfill', ) ); } }//end if update_post_meta( $post_id, WCEmailTemplateDivergenceDetector::VERSION_META_KEY, $version ); update_post_meta( $post_id, WCEmailTemplateDivergenceDetector::SOURCE_HASH_META_KEY, $current_core_hash ); update_post_meta( $post_id, WCEmailTemplateDivergenceDetector::LAST_SYNCED_AT_META_KEY, gmdate( 'Y-m-d H:i:s' ) ); update_post_meta( $post_id, WCEmailTemplateDivergenceDetector::STATUS_META_KEY, $status_for_stamp ); // Seed the three-way base with the current canonical render. We don't know the // original generation-time render for pre-existing posts; the alternative — empty // meta, falling back to 2-way's inversion-guard heuristic — is strictly worse. update_post_meta( $post_id, WCEmailTemplateDivergenceDetector::LAST_CORE_RENDER_META_KEY, $canonical_post_content ); } /** * Map a case to the initial status meta value. * * Cases A and B produce `in_sync` (both result in post content matching * the canonical core render, so the stamp and the content agree). Case C * deliberately seeds `core_updated_customized` — see class docblock. * * @param string $case_id One of self::CASE_A/B/C. * @return string One of the WCEmailTemplateDivergenceDetector::STATUS_* constants. */ private static function status_for_case( string $case_id ): string { if ( self::CASE_C === $case_id ) { return WCEmailTemplateDivergenceDetector::STATUS_CORE_UPDATED_CUSTOMIZED; } return WCEmailTemplateDivergenceDetector::STATUS_IN_SYNC; } /** * Resolve the version string for an email by parsing the `@version` tag * from its block template file. Falls back to the registry's cached * version if the direct parse returns empty. * * @param \WC_Email $email The registered email instance. * @return string The parsed version, or an empty string if none can be resolved. */ private static function resolve_version_for_email( \WC_Email $email ): string { $sync_config = WCEmailTemplateSyncRegistry::get_email_sync_config( (string) $email->id ); if ( is_array( $sync_config ) && isset( $sync_config['template_path'] ) ) { $parsed = WCEmailTemplateSyncRegistry::parse_version_header( (string) $sync_config['template_path'] ); if ( '' !== $parsed ) { return $parsed; } return (string) ( $sync_config['version'] ?? '' ); } return ''; } /** * Fetch every `woo_email` post that has not yet been stamped with a * source hash. * * The `NOT EXISTS` clause is what makes the callback retry-safe: posts * stamped by RSM-137 (new installs) or by a previous invocation of this * migration are filtered out, so an Action Scheduler retry converges on * exactly the posts that still need work. * * @return \stdClass[] Rows with `ID`, `post_content`, `post_date_gmt`, `post_modified_gmt`. */ private static function fetch_eligible_posts(): array { global $wpdb; // phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching $rows = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_content, post_date, post_modified, post_date_gmt, post_modified_gmt FROM {$wpdb->posts} WHERE post_type = %s AND post_status <> 'trash' AND NOT EXISTS ( SELECT 1 FROM {$wpdb->postmeta} pm WHERE pm.post_id = {$wpdb->posts}.ID AND pm.meta_key = %s ) ORDER BY ID ASC", Integration::EMAIL_POST_TYPE, WCEmailTemplateDivergenceDetector::SOURCE_HASH_META_KEY ) ); // phpcs:enable WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching return is_array( $rows ) ? $rows : array(); } /** * Flip the backfill-complete option and fire the completion action. * * Order matters: the option is updated first so any listener that * inspects it inside the action sees the final state. */ private static function finalize(): void { update_option( WCEmailTemplateDivergenceDetector::BACKFILL_COMPLETE_OPTION, 'yes' ); /** * Fires once, immediately after the RSM-149 sync-meta backfill * finalizes for this site. * * Hooked by {@see WCEmailTemplateDivergenceDetector::run_sweep()} so the * first real divergence sweep runs with a fully-stamped post set. * * @since 10.8.0 */ do_action( self::BACKFILL_COMPLETE_ACTION ); } /** * Return the logger instance, lazily creating it the first time. * * @return Email_Editor_Logger_Interface */ private static function get_logger(): Email_Editor_Logger_Interface { if ( null === self::$logger ) { self::$logger = new Logger( wc_get_logger() ); } return self::$logger; } }