+# single pass linkification of <Message-ID@example.com> within $str
+# with $pfx being the URL prefix
+sub linkify_mids {
+ my ($self, $pfx, $str, $raw) = @_;
+ $$str =~ s!<([^>]+)>!
+ my $msgid = PublicInbox::Hval->new_msgid($1);
+ my $html = $msgid->as_html;
+ my $href = $msgid->{href};
+ $href = ascii_html($href); # for IDN
+
+ # salt this, as this could be exploited to show
+ # links in the HTML which don't show up in the raw mail.
+ my $key = sha1_hex($html . $SALT);
+ my $repl = qq(<<a\nhref="$pfx/$href/">$html</a>>);
+ $repl .= qq{ (<a\nhref="$pfx/$href/raw">raw</a>)} if $raw;
+ $self->{$key} = $repl;
+ 'PI-LINK-'. $key;
+ !ge;
+ $$str = ascii_html($$str);
+ $$str =~ s!\bPI-LINK-([a-f0-9]{40})\b!
+ my $key = $1;
+ my $repl = $_[0]->{$key};
+ if (defined $repl) {
+ $repl;
+ } else {
+ # false positive or somebody tried to mess with us
+ $key;
+ }
+ !ge;
+}
+
+sub to_html { linkify_2($_[0], ascii_html(linkify_1(@_))) }
+