[PATCH 1/2] over: re-sort Subject matches for WWW /T/ endpoint

[Eric Wong <e@80x24.org>]

When retrieving loose (Subject) matches for a thread, we wanted
the most recent matches in reverse chronological order.
However, when displaying the /T/ endpoint generating the thread
skeleton, we prefer ascending chronological order to match the
flow of the conversation.

Reported-by: Askar Safin <safinaskar@gmail.com>
Link: https://public-inbox.org/meta/CAPnZJGAqsh8ZhPaCAy5M2NZVNcWrr_Hr94t32VXiyiTXwD9jRQ@mail.gmail.com/
---
 lib/PublicInbox/Over.pm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/PublicInbox/Over.pm b/lib/PublicInbox/Over.pm
index 4eed4f46..3b7d49f5 100644
--- a/lib/PublicInbox/Over.pm
+++ b/lib/PublicInbox/Over.pm
@@ -200,6 +200,11 @@ ORDER BY $sort_col DESC
 		# TODO separate strict and loose matches here once --reindex
 		# is fixed to preserve `tid' properly
 		push @$msgs, @$loose;
+
+		# we wanted to retrieve the latest loose messages; but preserve
+		# chronological ordering for threading /$INBOX/$MSGID/[tT]/
+		$sort_col eq 'ds' and
+			@$msgs = sort { $a->{ds} <=> $b->{ds} } @$msgs;
 	}
 	($nr, $msgs);
 }