Ticket #10786: 10786.patch

wp-includes/link-template.php

@@ -78 +78 @@
  * @return string
  */
 function get_permalink($id = 0, $leavename = false) {
+        global $wp_taxonomies;
+
         $rewritecode = array(
                 '%year%',
                 '%monthnum%',
@@ -150 +152 @@
                         $author,
                         $post->post_name,
                 );
+
+                foreach ( $wp_taxonomies as $taxonomy ) {
+                        if ( in_array( $taxonomy->name, array( 'category', 'post_tag', 'link_tag' ) ) or ( 'post' != $taxonomy->object_type ) )
+                                continue;
+                        if ( strpos($permalink, "%{$taxonomy->rewrite['slug']}%") !== false ) {
+                                $rewritecode[] = "%{$taxonomy->rewrite['slug']}%";
+                                $terms = wp_get_object_terms( $post->ID, $taxonomy->name );
+                                if ( $terms ) {
+                                        usort($terms, '_usort_terms_by_ID');
+                                        $rewritereplace[] = $terms[0]->slug;
+                                }
+                                if ( empty($terms) ) {
+                                        $default_term = get_term( get_option( "default_{$taxonomy->name}" ), $taxonomy->name );
+                                        $rewritereplace[] = is_wp_error( $default_term ) ? '' : $default_term->slug;
+                                }
+                        }
+
+                }
+
                 $permalink = get_option('home') . str_replace($rewritecode, $rewritereplace, $permalink);
                 $permalink = user_trailingslashit($permalink, 'single');
                 return apply_filters('post_link', $permalink, $post, $leavename);