Ticket #5344: 5344-limit-topic-creation.patch

sites/trunk/wordpress.org/public_html/wp-content/plugins/support-forums/inc/class-hooks.php

@@ -21 +21 @@
                 add_action( 'template_redirect',               array( $this, 'redirect_legacy_user_structure' ) );
                 add_filter( 'wp_insert_post_data',             array( $this, 'set_post_date_gmt_for_pending_posts' ) );
                 add_action( 'wp_print_footer_scripts',         array( $this, 'replace_quicktags_blockquote_button' ) );
+                add_filter( 'pre_insert_term',                 array( $this, 'limit_topic_tag_creation' ), 10, 2 );
 
                 // Add bbPress support to the WordPress.org SEO plugin.
                 add_filter( 'wporg_canonical_base_url', array( $this, 'wporg_canonical_base_url' ) );
@@ -128 +129 @@
                 add_filter( 'bbp_subscription_mail_message', array( $this, 'bbp_subscription_mail_message'), 5, 3 );
         }
 
+        /**
+         * Limit the creation of new tags to moderators or above.
+         *
+         * This curates the list of tags, keeping the tag list short and relevant.
+         *
+         * @param string $term     The new tag to add.
+         * @param string $taxonomy Taxonomy to add a new tag to.
+         *
+         * @return \WP_Error|string The term if capabilities allow, otherwise a `WP_Error`.
+         */
+        public function limit_topic_tag_creation( $term, $taxonomy ) {
+                if ( 'topic-tag' !== $taxonomy ) {
+                        return $term;
+                }
+
+                if ( ! current_user_can( 'moderate' ) ) {
+                        return new \WP_Error( 'limit_topic_tag_creation' );
+                }
+
+                return $term;
+        }
+
         /**
          * Check "Notify me of follow-up replies via email" box for new topics by default.
          *