Ticket #23665: 23665-post-preview.patch

wp-admin/includes/post.php

@@ -1383 +1383 @@
         if ( is_wp_error($id) )
                 wp_die( $id->get_error_message() );
 
-        if ( $_POST['post_status'] == 'draft' && $user_id == $post->post_author ) {
-                $url = add_query_arg( 'preview', 'true', get_permalink($id) );
+        // Get post-request post-status-object to check if public/private/protected
+        $post_request_status_obj = get_post_status_object( $_POST['post_status'] );
+
+        // This tricky bit determines if the post-status-object for the post-request
+        // is public, or one that only the current user can see, so that the proper
+        // preview link is generated (with or without a preview nonce.)
+        if ( true === $post_request_status_obj->public || ( $user_id == $post->post_author && ( true === $post_request_status_obj->private ) || ( true === $post_request_status_obj->protected ) )  ) {
+                $url = add_query_arg( 'preview', 'true', get_permalink( $id ) );
         } else {
                 $nonce = wp_create_nonce('post_preview_' . $id);
                 $url = add_query_arg( array( 'preview' => 'true', 'preview_id' => $id, 'preview_nonce' => $nonce ), get_permalink($id) );