Ticket #44321: 44321.1.diff

src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php

@@ -1664 +1664 @@
                 }
 
                 if ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'revisions' ) ) {
+                        $revisions = wp_get_post_revisions( $post->ID );
+                        $revisions_count = count( $revisions );
+
                         $links['version-history'] = array(
-                                'href' => rest_url( trailingslashit( $base ) . $post->ID . '/revisions' ),
+                                'href'  => rest_url( trailingslashit( $base ) . $post->ID . '/revisions' ),
+                                'count' => $revisions_count,
                         );
+
+                        if ( 0 < $revisions_count ) {
+                                $last_revision = array_shift( $revisions );
+
+                                $links['predecessor'] = array(
+                                        'href' => rest_url( trailingslashit( $base ) . $post->ID . '/revisions/' . $last_revision->ID ),
+                                );
+                        }
                 }
 
                 $post_type_obj = get_post_type_object( $post->post_type );