fix: entityExtant()

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

lib/Service/Remote/RemoteMailService.php

@@ -298,6 +298,25 @@ class RemoteMailService
         return $this->entityApplyRange($uids, $range);
     }
 
+    /**
+     * Determine which of the given UIDs exist in a mailbox.
+     *
+     * @return int[]  the subset of the given UIDs that exist
+     */
+    public function entityExtant(string $collection, int ...$uids): array
+    {
+        if ($uids === []) {
+            return [];
+        }
+
+        $this->imapClient()->perform(new SelectCommand($collection, true));
+
+        return $this->imapClient()->perform(new SearchCommand(
+            SearchCriteriaBuilder::create()->uid(SequenceSet::items(...$uids)),
+            IdentifierMode::Uid,
+        ))->matches();
+    }
+
     /**
      * Retrieve a list of messages in a mailbox matching the given filter, sorted and paginated as requested.
      *