Preserve Raw ML values in Yoast indexables

src/modules/wp-seo/wp-seo-admin.php

@@ -21,3 +21,176 @@ function qtranxf_wpseo_load_admin_page_config( array $page_configs ): array {
 
     return $page_configs;
 }
+
+/**
+ * Store Raw ML values in Yoast indexables.
+ *
+ * Explicit Yoast fields are stored as Raw ML.
+ * Empty fields remain null so Yoast templates and fallbacks keep working.
+ * Breadcrumb title falls back to the Raw ML object title.
+ */
+function qtranxf_wpseo_save_raw_indexable_fields( $indexable ): void {
+    if (
+        ! is_object( $indexable ) ||
+        empty( $indexable->object_id )
+    ) {
+        return;
+    }
+
+    $values = array();
+    $changed = false;
+
+    switch ( $indexable->object_type ) {
+        case 'post':
+            $post_id = (int) $indexable->object_id;
+            $post    = get_post( $post_id );
+
+            if ( ! $post instanceof WP_Post ) {
+                return;
+            }
+
+            $meta_map = array(
+                '_yoast_wpseo_title'
+                    => 'title',
+
+                '_yoast_wpseo_metadesc'
+                    => 'description',
+
+                '_yoast_wpseo_bctitle'
+                    => 'breadcrumb_title',
+
+                '_yoast_wpseo_opengraph-title'
+                    => 'open_graph_title',
+
+                '_yoast_wpseo_opengraph-description'
+                    => 'open_graph_description',
+
+                '_yoast_wpseo_twitter-title'
+                    => 'twitter_title',
+
+                '_yoast_wpseo_twitter-description'
+                    => 'twitter_description',
+            );
+
+            foreach ( $meta_map as $meta_key => $field ) {
+                $value = get_post_meta(
+                    $post_id,
+                    $meta_key,
+                    true
+                );
+
+                $values[ $field ] = (
+                    is_string( $value ) &&
+                    $value !== ''
+                ) ? $value : null;
+            }
+
+            /*
+             * Breadcrumb title is the only field that must fall
+             * back to the untranslated database object title.
+             *
+             * Other empty fields remain null so Yoast can use its
+             * templates and normal fallback hierarchy.
+             */
+            if ( $values['breadcrumb_title'] === null ) {
+                $values['breadcrumb_title'] = wp_strip_all_tags(
+                    $post->post_title,
+                    true
+                );
+            }
+            break;
+
+        case 'term':
+            $term_id  = (int) $indexable->object_id;
+            $taxonomy = $indexable->object_sub_type;
+            $term     = get_term( $term_id, $taxonomy );
+
+            if ( ! $term instanceof WP_Term ) {
+                return;
+            }
+
+            $term_meta = array();
+
+            if ( class_exists( 'WPSEO_Taxonomy_Meta' ) ) {
+                $loaded_meta = WPSEO_Taxonomy_Meta::get_term_meta(
+                    $term,
+                    $taxonomy,
+                    null
+                );
+
+                if ( is_array( $loaded_meta ) ) {
+                    $term_meta = $loaded_meta;
+                }
+            }
+
+            $meta_map = array(
+                'wpseo_title'
+                    => 'title',
+
+                'wpseo_desc'
+                    => 'description',
+
+                'wpseo_bctitle'
+                    => 'breadcrumb_title',
+
+                'wpseo_opengraph-title'
+                    => 'open_graph_title',
+
+                'wpseo_opengraph-description'
+                    => 'open_graph_description',
+
+                'wpseo_twitter-title'
+                    => 'twitter_title',
+
+                'wpseo_twitter-description'
+                    => 'twitter_description',
+            );
+
+            foreach ( $meta_map as $meta_key => $field ) {
+                $value = $term_meta[ $meta_key ] ?? null;
+
+                $values[ $field ] = (
+                    is_string( $value ) &&
+                    $value !== ''
+                ) ? $value : null;
+            }
+
+            if ( $values['breadcrumb_title'] === null ) {
+                if ( function_exists( 'qtranxf_get_term_joined' ) ) {
+                    $term = qtranxf_get_term_joined(
+                        $term,
+                        $taxonomy
+                    );
+                }
+
+                $values['breadcrumb_title'] = $term->name;
+            }
+            break;
+
+        default:
+            return;
+    }
+
+    foreach ( $values as $field => $value ) {
+        if ( $indexable->{$field} === $value ) {
+            continue;
+        }
+
+        $indexable->{$field} = $value;
+        $changed = true;
+    }
+
+    if ( $changed ) {
+        /*
+         * Direct model save does not trigger the
+         * wpseo_saved_indexable action recursively.
+         */
+        $indexable->save();
+    }
+}
+
+add_action(
+    'wpseo_saved_indexable',
+    'qtranxf_wpseo_save_raw_indexable_fields',
+    10
+);