[geary/wip/unread-status-714865: 7/10] Check for is_no_select

[Charles Lindsay <clindsay src gnome org>]

commit d292fb47a77bfaa80d478ea7604178911275dace
Author: Charles Lindsay <chaz yorba org>
Date:   Thu Feb 20 16:20:25 2014 -0800

    Check for is_no_select

 src/engine/imap/api/imap-account.vala |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/engine/imap/api/imap-account.vala b/src/engine/imap/api/imap-account.vala
index 976a9ba..d8940c1 100644
--- a/src/engine/imap/api/imap-account.vala
+++ b/src/engine/imap/api/imap-account.vala
@@ -199,7 +199,12 @@ private class Geary.Imap.Account : BaseObject {
         throws Error {
         check_open();
         
-        // TODO: check mailbox_info.attrs.is_no_select first?
+        MailboxInformation? mailbox_info = path_to_mailbox.get(path);
+        if (mailbox_info == null)
+            throw_not_found(path);
+        if (mailbox_info.attrs.is_no_select)
+            throw new EngineError.UNSUPPORTED("Can't fetch unseen count for unselectable folder %s", path);
+        
         StatusData data = yield fetch_status_async(path, { StatusDataType.UNSEEN }, cancellable);
         return data.unseen;
     }