[PATCH 2/2] www: omit [thread overview] link for unindexed v1

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

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.
---
 lib/PublicInbox/View.pm | 8 +++++++-
 t/plack.t               | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

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);
diff --git a/t/plack.t b/t/plack.t
index 3ba2e6fb..1cee286d 100644
--- a/t/plack.t
+++ b/t/plack.t
@@ -158,6 +158,8 @@ my $c1 = sub {
 	like($html, qr!<title>hihi - Me</title>!, 'HTML returned');
 	like($html, qr!<a\nhref=raw!s, 'raw link present');
 	like($html, qr!&gt; quoted text!s, 'quoted text inline');
+	unlike($html, qr!thread overview!,
+		'thread overview not shown w/o ->over');
 
 	$path .= 'f/';
 	$res = $cb->(GET($pfx . $path));