1 files changed, 28 insertions, 0 deletions
diff --git a/lib/public/Comments/ICommentsManager.php b/lib/public/Comments/ICommentsManager.php
index 98169fb335f..6a32cfd803d 100644
--- a/lib/public/Comments/ICommentsManager.php
+++ b/lib/public/Comments/ICommentsManager.php
@@ -246,4 +246,32 @@ interface ICommentsManager {
 	 */
 	public function registerEventHandler(\Closure $closure);
 
+	/**
+	 * registers a method that resolves an ID to a display name for a given type
+	 *
+	 * @param string $type
+	 * @param \Closure $closure
+	 * @throws \OutOfBoundsException
+	 * @since 9.2.0
+	 *
+	 * Only one resolver shall be registered per type. Otherwise a
+	 * \OutOfBoundsException has to thrown.
+	 */
+	public function registerDisplayNameResolver($type, \Closure $closure);
+
+	/**
+	 * resolves a given ID of a given Type to a display name.
+	 *
+	 * @param string $type
+	 * @param string $id
+	 * @return string
+	 * @throws \OutOfBoundsException
+	 * @since 9.2.0
+	 *
+	 * If a provided type was not registered, an \OutOfBoundsException shall
+	 * be thrown. It is upon the resolver discretion what to return of the
+	 * provided ID is unknown. It must be ensured that a string is returned.
+	 */
+	public function resolveDisplayName($type, $id);
+
 }