From e51c8899d67e5d86a868e1adced55a6c72113daa Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Sat, 5 Mar 2016 18:36:07 +0100
Subject: pullimap: add support for IMAP IDLE (RFC 2177).

---
 lib/Net/IMAP/InterIMAP.pm | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'lib')

diff --git a/lib/Net/IMAP/InterIMAP.pm b/lib/Net/IMAP/InterIMAP.pm
index 15682b3..2898905 100644
--- a/lib/Net/IMAP/InterIMAP.pm
+++ b/lib/Net/IMAP/InterIMAP.pm
@@ -968,6 +968,35 @@ sub slurp($;$$) {
 }
 
 
+# $self->idle([$timeout, $stopwhen])
+#   Enter IDLE (RFC 2177) for $timout seconds (by default 29 mins), or
+#   when the callback $stopwhen returns true.
+#   Return false if the timeout was reached, and true if IDLE was
+#   stopped due the callback.
+sub idle($$$) {
+    my ($self, $timeout, $stopwhen) = @_;
+    $timeout //= 1740; # 29 mins
+
+    $self->fail("Server did not advertise IDLE (RFC 2177) capability.")
+        unless $self->_capable('IDLE');
+
+    my $tag = $self->_cmd_init('IDLE');
+    $self->_cmd_flush();
+
+    for (; $timeout > 0; $timeout--) {
+        $self->slurp('IDLE', sub() {$timeout = -1 if $stopwhen->()});
+        sleep 1 if $timeout > 0;
+    }
+
+    # done idling
+    $self->_cmd_extend('DONE');
+    $self->_cmd_flush();
+    $self->_recv($tag);
+
+    return $timeout < 0 ? 1 : 0;
+}
+
+
 # $self->set_cache( $mailbox, STATE )
 #   Initialize or update the persistent cache, that is, associate a
 #   known $mailbox with the last known (synced) state:
@@ -2294,6 +2323,7 @@ sub _resp($$;$$$) {
     else {
         $self->panic("Unexpected response: ", $_);
     }
+    $callback->() if defined $callback and $cmd eq 'IDLE';
 }
 
 
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