From 4f9defb0a1b9a69f4eb7dde4bdf9334bee4d0c79 Mon Sep 17 00:00:00 2001
From: Robin Qu <robinqu@gmail.com>
Date: Mon, 13 Aug 2012 13:16:53 +0800
Subject: [PATCH] support sequence set for search

---
 lib/imap.utilities.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/imap.utilities.js b/lib/imap.utilities.js
index b8bf7e0..ff51f56 100644
--- a/lib/imap.utilities.js
+++ b/lib/imap.utilities.js
@@ -365,7 +365,14 @@ exports.buildSearchQuery = function(options, extensions, isOrChild) {
           searchargs += modifier + criteria + ' ' + args[0];
         break;
         default:
-          throw new Error('Unexpected search option: ' + criteria);
+          try {
+            // last hope it's a seqno set
+            // http://tools.ietf.org/html/rfc3501#section-6.4.4
+            exports.validateUIDList([criteria]);
+            searchargs += modifier + criteria;
+          } catch(e) {
+            throw new Error('Unexpected search option: ' + criteria);
+          }
       }
     }
     if (isOrChild)