www: omit [thread overview] link for unindexed v1

Unindexed v1 inboxes do not have the thread overview skeleton
at the bottom of /$MSGID/ pages, so do not link to it.
And for rare messages without a Date: header (or any headers!),
this also ensures the [thread overview] is shown regardless.

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 11a94ba9..2b8e220b 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -717,7 +717,13 @@ sub _msg_page_prepare_obuf {
         for my $v ($eml->header('Date')) {
                 $v = ascii_html($v);
                 obfuscate_addrs($obfs_ibx, $v) if $obfs_ibx; # possible :P
-                $rv .= qq{Date: $v\t<a\nhref="#r">[thread overview]</a>\n};
+                $rv .= qq{Date: $v\n};
+        }
+        # [thread overview] link is typically added after Date,
+        # but added after Subject, or even nothing.
+        if ($have_over) {
+                chop $rv; # drop "\n", or noop if $rv eq ''
+                $rv .= qq{\t<a\nhref="#r">[thread overview]</a>\n};
         }
         if (!$nr) { # first (and only) message, common case
                 $ctx->{-title_html} = join(' - ', @title);