Notify about new mailbox

Changelog.md

@@ -6,6 +6,7 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 
 ### Added
 * IMAP extension MOVE with UIDPLUS support
+* IMAP mailbox info update when new mailbox is created
 * IMAP extension Unselect
 * More logs about event loop activity
 

internal/store/address_mailbox.go

@@ -78,6 +78,7 @@ func (storeAddress *Address) createOrUpdateMailboxEvent(label *pmapi.Label) erro
 			return err
 		}
 		storeAddress.mailboxes[label.ID] = mailbox
+		mailbox.store.imapMailboxCreated(storeAddress.address, mailbox.labelName)
 	} else {
 		mailbox.labelName = prefix + label.Name
 		mailbox.color = label.Color

internal/store/change.go

@@ -76,6 +76,20 @@ func (store *Store) imapDeleteMessage(address, mailboxName string, sequenceNumbe
 	store.imapSendUpdate(update)
 }
 
+func (store *Store) imapMailboxCreated(address, mailboxName string) {
+	store.log.WithFields(logrus.Fields{
+		"address": address,
+	}).Trace("IDLE mailbox info")
+	update := new(imapBackend.MailboxInfoUpdate)
+	update.Update = imapBackend.NewUpdate(address, "")
+	update.MailboxInfo = &imap.MailboxInfo{
+		Attributes: []string{imap.NoInferiorsAttr},
+		Delimiter:  PathDelimiter,
+		Name:       mailboxName,
+	}
+	store.imapSendUpdate(update)
+}
+
 func (store *Store) imapMailboxStatus(address, mailboxName string, total, unread, unreadSeqNum uint) {
 	store.log.WithFields(logrus.Fields{
 		"address":      address,