+# Copyright (C) 2019 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# Provide an HTTP-accessible listing of inboxes.
+# Used by PublicInbox::WWW
+package PublicInbox::WwwListing;
+use strict;
+use warnings;
+use PublicInbox::Hval qw(ascii_html);
+use PublicInbox::Linkify;
+use PublicInbox::View;
+
+sub list_all ($$) {
+ my ($self, undef) = @_;
+ my @list;
+ $self->{pi_config}->each_inbox(sub {
+ my ($ibx) = @_;
+ push @list, $ibx unless $ibx->{-hide}->{www};
+ });
+ \@list;
+}
+
+sub list_match_domain ($$) {
+ my ($self, $env) = @_;
+ my @list;
+ my $host = $env->{HTTP_HOST} // $env->{SERVER_NAME};
+ $host =~ s/:\d+\z//;
+ my $re = qr!\A(?:https?:)?//\Q$host\E(?::\d+)?/!i;
+ $self->{pi_config}->each_inbox(sub {
+ my ($ibx) = @_;
+ push @list, $ibx if !$ibx->{-hide}->{www} && $ibx->{url} =~ $re;
+ });
+ \@list;
+}
+
+sub list_404 ($$) { [] }
+
+# TODO: +cgit
+my %VALID = (
+ all => *list_all,
+ 'match=domain' => *list_match_domain,
+ 404 => *list_404,
+);
+
+sub new {
+ my ($class, $www) = @_;
+ my $k = 'publicinbox.wwwListing';
+ my $pi_config = $www->{pi_config};
+ my $v = $pi_config->{lc($k)} // 404;
+ bless {
+ pi_config => $pi_config,
+ style => $www->style("\0"),
+ list_cb => $VALID{$v} || do {
+ warn <<"";
+`$v' is not a valid value for `$k'
+$k be one of `all', `match=domain', or `404'
+
+ *list_404;
+ },
+ }, $class;
+}
+
+sub ibx_entry {
+ my ($mtime, $ibx, $env) = @_;
+ my $ts = PublicInbox::View::fmt_ts($mtime);
+ my $url = PublicInbox::Hval::prurl($env, $ibx->{url});
+ my $tmp = <<"";
+* $ts - $url
+ ${\$ibx->description}
+
+ if (defined(my $info_url = $ibx->{info_url})) {
+ $tmp .= "\n$info_url";
+ }
+ $tmp;
+}
+
+# not really a stand-alone PSGI app, but maybe it could be...
+sub call {
+ my ($self, $env) = @_;
+ my $h = [ 'Content-Type', 'text/html; charset=UTF-8' ];
+ my $list = $self->{list_cb}->($self, $env);
+ my $code = 404;
+ my $title = 'public-inbox';
+ my $out = '';
+ if (@$list) {
+ # Swartzian transform since ->modified is expensive
+ @$list = sort {
+ $b->[0] <=> $a->[0]
+ } map { [ $_->modified, $_ ] } @$list;
+
+ $code = 200;
+ $title .= ' - listing';
+ my $tmp = join("\n", map { ibx_entry(@$_, $env) } @$list);
+ my $l = PublicInbox::Linkify->new;
+ $l->linkify_1($tmp);
+ $out = '<pre>'.$l->linkify_2(ascii_html($tmp)).'</pre><hr>';
+ }
+ $out = "<html><head><title>$title</title></head><body>" . $out;
+ $out .= '<pre>'. PublicInbox::WwwStream::code_footer($env) .
+ '</pre></body></html>';
+ [ $code, $h, [ $out ] ]
+}
+
+1;