1 files changed, 19 insertions, 0 deletions
diff --git a/lib/PublicInbox/NetReader.pm b/lib/PublicInbox/NetReader.pm
index 058f4313..2795a9d4 100644
--- a/lib/PublicInbox/NetReader.pm
+++ b/lib/PublicInbox/NetReader.pm
@@ -747,4 +747,23 @@ sub nntp_each {
  
  sub new { bless {}, shift };
  
+# updates $uri with UIDVALIDITY
+sub mic_for_folder {
+        my ($self, $uri) = @_;
+        my $mic = $self->mic_get($uri) or die "E: not connected: $@";
+        my $m = $self->isa('PublicInbox::NetWriter') ? 'select' : 'examine';
+        $mic->$m($uri->mailbox) or return;
+        my $uidval;
+        for ($mic->Results) {
+                /^\* OK \[UIDVALIDITY ([0-9]+)\].*/ or next;
+                $uidval = $1;
+                last;
+        }
+        $uidval //= $mic->uidvalidity($uri->mailbox) or
+                die "E: failed to get uidvalidity from <$uri>: $@";
+        $uri->uidvalidity($uidval);
+        $mic;
+}
+
+
  1;