1 # Copyright (C) 2014-2015 all contributors <meta@public-inbox.org>
2 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
4 # Used for displaying the HTML web interface.
5 # See Documentation/design_www.txt for this.
6 package PublicInbox::View;
9 use URI::Escape qw/uri_escape_utf8/;
10 use Date::Parse qw/str2time/;
11 use Encode qw/find_encoding/;
12 use Encode::MIME::Header;
13 use Email::MIME::ContentType qw/parse_content_type/;
14 use PublicInbox::Hval;
15 use PublicInbox::MID qw/mid_clean id_compress mid2path/;
16 use Digest::SHA qw/sha1_hex/;
20 # TODO: make these constants tunable
21 use constant MAX_INLINE_QUOTED => 12; # half an 80x24 terminal
22 use constant MAX_TRUNC_LEN => 72;
23 use constant T_ANCHOR => '#u';
24 use constant INDENT => ' ';
26 *ascii_html = *PublicInbox::Hval::ascii_html;
28 my $enc_utf8 = find_encoding('UTF-8');
32 my ($ctx, $mime, $full_pfx, $footer) = @_;
33 if (defined $footer) {
34 $footer = "\n" . $footer;
38 my $hdr = $mime->header_obj;
39 headers_to_html_header($hdr, $full_pfx, $ctx) .
40 multipart_text_as_html($mime, $full_pfx) .
42 html_footer($hdr, 1, $full_pfx, $ctx) .
44 '</pre></body></html>';
48 my ($class, $mime, $full_pfx) = @_;
50 # no <head> here for <style>...
51 PublicInbox::Hval::PRE .
52 multipart_text_as_html($mime, $full_pfx) . '</pre>';
57 my $irt = $hdr->header('In-Reply-To');
59 return mid_clean($irt) if (defined $irt);
61 my $refs = $hdr->header('References');
62 if ($refs && $refs =~ /<([^>]+)>\s*\z/s) {
68 # this is already inside a <pre>
70 my ($fh, $mime, $level, $state) = @_;
71 my $midx = $state->{anchor_idx}++;
72 my $ctx = $state->{ctx};
73 my $srch = $ctx->{srch};
74 my ($prev, $next) = ($midx - 1, $midx + 1);
76 my $hdr = $mime->header_obj;
77 my $enc = enc_for($hdr->header("Content-Type"));
78 my $subj = $hdr->header('Subject');
80 my $mid_raw = mid_clean($hdr->header('Message-ID'));
81 my $id = anchor_for($mid_raw);
82 my $seen = $state->{seen};
83 $seen->{$id} = "#$id"; # save the anchor for children, later
85 my $mid = PublicInbox::Hval->new_msgid($mid_raw);
86 my $from = PublicInbox::Hval->new_oneline($hdr->header('From'))->raw;
87 my @from = Email::Address->parse($from);
88 $from = $from[0]->name;
90 $from = PublicInbox::Hval->new_oneline($from)->as_html;
91 $subj = PublicInbox::Hval->new_oneline($subj)->as_html;
92 my $root_anchor = $state->{root_anchor} || '';
93 my $path = $root_anchor ? '../../' : '';
94 my $href = $mid->as_href;
95 my $irt = in_reply_to($hdr);
96 my $parent_anchor = $seen->{anchor_for($irt)} if defined $irt;
99 my $t = $ctx->{flat} ? 'T' : 't';
100 $subj = "<a\nhref=\"${path}$href/$t/#u\">$subj</a>";
102 if ($root_anchor eq $id) {
103 $subj = "<u\nid=u>$subj</u>";
106 my $ts = _msg_date($hdr);
107 my $rv = "<pre\nid=s$midx>";
108 $rv .= "<b\nid=$id>$subj</b>\n";
109 $rv .= "- $from @ $ts UTC - ";
110 $rv .= "<a\nhref=\"#s$next\">next</a>";
112 $rv .= "/<a\nhref=\"#s$prev\">prev</a>";
114 $fh->write($rv .= "\n\n");
116 my ($fhref, $more_ref);
117 my $mhref = "${path}$href/";
118 my $more = 'permalink';
120 # show full message if it's our root message
121 my $neq = $root_anchor ne $id;
122 if ($neq || ($neq && $level != 0 && !$ctx->{flat})) {
123 $fhref = "${path}$href/f/";
126 # scan through all parts, looking for displayable text
127 $mime->walk_parts(sub {
128 index_walk($fh, $_[0], $enc, \$part_nr, $fhref, $more_ref);
132 my $txt = "${path}$href/raw";
133 $rv = "\n<a\nhref=\"$mhref\">$more</a> <a\nhref=\"$txt\">raw</a> ";
134 $rv .= html_footer($hdr, 0, undef, $ctx);
137 unless (defined $parent_anchor) {
138 my $v = PublicInbox::Hval->new_msgid($irt, 1);
140 $parent_anchor = "${path}$v/";
142 $rv .= " <a\nhref=\"$parent_anchor\">parent</a>";
144 if (my $pct = $state->{pct}) { # used by SearchView.pm
145 $rv .= " [relevance $pct->{$mid_raw}%]";
148 $rv .= " [<a\nhref=\"${path}$href/t/#u\">threaded</a>" .
151 $rv .= " [<b>threaded</b>|" .
152 "<a\nhref=\"${path}$href/T/#u\">flat</a>]";
155 $fh->write($rv .= '</pre>');
159 my ($ctx, $foot, $srch) = @_;
160 sub { emit_thread_html($_[0], $ctx, $foot, $srch) }
163 # only private functions below.
165 sub emit_thread_html {
166 my ($cb, $ctx, $foot, $srch) = @_;
167 my $mid = $ctx->{mid};
168 my $res = $srch->get_thread($mid);
169 my $msgs = load_results($res);
170 my $nr = scalar @$msgs;
171 return missing_thread($cb, $ctx) if $nr == 0;
172 my $flat = $ctx->{flat};
178 root_anchor => anchor_for($mid),
183 require PublicInbox::Git;
184 my $git = $ctx->{git} ||= PublicInbox::Git->new($ctx->{git_dir});
186 pre_anchor_entry($seen, $_) for (@$msgs);
187 __thread_entry(\$cb, $git, $state, $_, 0) for (@$msgs);
189 my $th = thread_results($msgs);
190 thread_entry(\$cb, $git, $state, $_, 0) for $th->rootset;
191 if (my $max = $state->{cur_level}) {
192 $cb->write(('</ul></li>' x ($max - 1)) . '</ul>');
196 Email::Address->purge_cache;
198 # there could be a race due to a message being deleted in git
199 # but still being in the Xapian index:
200 return missing_thread($cb, $ctx) if ($orig_cb eq $cb);
202 my $final_anchor = $state->{anchor_idx};
203 my $next = "<a\nid=s$final_anchor>";
204 $next .= $final_anchor == 1 ? 'only message in' : 'end of';
205 $next .= " thread</a>, back to <a\nhref=\"../../\">index</a>";
206 $next .= "\ndownload thread: ";
207 $next .= "<a\nhref=\"../t.mbox.gz\">mbox.gz</a>";
208 $next .= " / follow: <a\nhref=\"../t.atom\">Atom feed</a>";
209 $cb->write('<hr /><pre>' . $next . "\n\n".
210 $foot . '</pre></body></html>');
215 my ($fh, $part, $enc, $part_nr, $fhref, $more) = @_;
216 my $s = add_text_body($enc, $part, $part_nr, $fhref);
220 # drop the remainder of git patches, they're usually better
221 # to review when the full message is viewed
222 $s =~ s!^---+\n.*\z!!ms and $m = 1;
225 $s =~ s/^-- \n.*\z//ms and $m = 1;
226 $$more = "<b>More...</b>\n\n$$more" if $m;
229 # kill any leading or trailing whitespace lines
234 # kill per-line trailing whitespace
235 $s =~ s/[ \t]+$//sgm;
236 $s .= "\n" unless $s =~ /\n\z/s;
242 my ($ct, $default) = @_;
243 $default ||= $enc_utf8;
244 defined $ct or return $default;
245 my $ct_parsed = parse_content_type($ct);
247 if (my $charset = $ct_parsed->{attributes}->{charset}) {
248 my $enc = find_encoding($charset);
255 sub multipart_text_as_html {
256 my ($mime, $full_pfx, $srch) = @_;
259 my $enc = enc_for($mime->header("Content-Type"));
261 # scan through all parts, looking for displayable text
262 $mime->walk_parts(sub {
264 $rv .= add_text_body($enc, $part, \$part_nr, $full_pfx, 1);
270 sub add_filename_line {
274 $fn = $enc->decode($fn);
276 $pad x= ($len/2) if ($len > 0);
277 "$pad " . ascii_html($fn) . " $pad\n";
280 my $LINK_RE = qr!\b((?:ftp|https?|nntp)://
282 ?[\@\w\+\&\?\.\%\;/#=-]*)!x;
285 my ($link_map, $s) = @_;
288 # salt this, as this could be exploited to show
289 # links in the HTML which don't show up in the raw mail.
290 my $key = sha1_hex($url . $SALT);
291 $link_map->{$key} = $url;
298 my ($link_map, $s) = @_;
300 # Added "PI-LINK-" prefix to avoid false-positives on git commits
301 $s =~ s!\bPI-LINK-([a-f0-9]{40})\b!
303 my $url = $link_map->{$key};
305 $url = ascii_html($url);
306 "<a\nhref=\"$url\">$url</a>";
308 # false positive or somebody tried to mess with us
316 my ($quot, $n, $part_nr, $full_pfx, $final, $do_anchor) = @_;
318 # n.b.: do not use <blockquote> since it screws up alignment
319 # w.r.t. unquoted text. Repliers may rely on pre-formatted
320 # alignment to point out a certain word in quoted text.
322 if (!$final && scalar(@$quot) <= MAX_INLINE_QUOTED) {
325 my $rv = join('', map { linkify_1(\%l, $_) } @$quot);
327 $rv = ascii_html($rv);
328 return linkify_2(\%l, $rv);
331 # show a short snippet of quoted text and link to full version:
332 @$quot = map { s/^(?:>\s*)+//gm; $_ } @$quot;
333 my $cur = join(' ', @$quot);
334 @$quot = split(/\s+/, $cur);
337 my $tmp = shift(@$quot);
338 my $len = length($tmp) + length($cur);
339 if ($len > MAX_TRUNC_LEN) {
344 } while (@$quot && length($cur) < MAX_TRUNC_LEN);
346 $cur =~ s/ \z/ .../s;
347 $cur = ascii_html($cur);
349 "> [<a\nhref=\"$full_pfx#q${part_nr}_$nr\">$cur</a>]\n";
351 # show everything in the full version with anchor from
352 # short version (see above)
354 my $rv .= join('', map { linkify_1(\%l, $_) } @$quot);
356 $rv = ascii_html($rv);
357 return linkify_2(\%l, $rv) unless $do_anchor;
359 "<a\nid=q${part_nr}_$nr></a>" . linkify_2(\%l, $rv);
364 my ($enc_msg, $part, $part_nr, $full_pfx, $do_anchor) = @_;
365 return '' if $part->subparts;
367 my $ct = $part->content_type;
368 # account for filter bugs...
369 if (defined $ct && $ct =~ m!\btext/x?html\b!i) {
373 my $enc = enc_for($ct, $enc_msg);
378 $s = $enc->decode($s);
379 my @lines = split(/^/m, $s);
383 my $fn = $part->filename;
384 defined($fn) or $fn = "part #" . ($$part_nr + 1);
385 $s .= add_filename_line($enc, $fn);
389 while (defined(my $cur = shift @lines)) {
391 # show the previously buffered quote inline
393 $s .= flush_quote(\@quot, \$n, $$part_nr,
394 $full_pfx, 0, $do_anchor);
399 $cur = linkify_1(\%l, $cur);
400 $cur = ascii_html($cur);
401 $s .= linkify_2(\%l, $cur);
407 $s .= flush_quote(\@quot, \$n, $$part_nr, $full_pfx, 1,
410 $s .= "\n" unless $s =~ /\n\z/s;
415 sub headers_to_html_header {
416 my ($hdr, $full_pfx, $ctx) = @_;
417 my $srch = $ctx->{srch} if $ctx;
420 my $mid = $hdr->header('Message-ID');
421 $mid = PublicInbox::Hval->new_msgid($mid);
422 foreach my $h (qw(From To Cc Subject Date)) {
423 my $v = $hdr->header($h);
424 defined($v) && ($v ne '') or next;
425 $v = PublicInbox::Hval->new_oneline($v);
428 my @from = Email::Address->parse($v->raw);
429 $title[1] = ascii_html($from[0]->name);
430 } elsif ($h eq 'Subject') {
431 $title[0] = $v->as_html;
433 $rv .= "$h: <b\nid=t>";
434 $rv .= $v->as_html . "</b>\n";
438 $rv .= "$h: " . $v->as_html . "\n";
441 $rv .= 'Message-ID: <' . $mid->as_html . '> ';
442 my $upfx = $full_pfx ? '' : '../';
443 $rv .= "(<a\nhref=\"${upfx}raw\">raw</a>)\n";
446 thread_inline(\$rv, $ctx, $hdr, $upfx);
448 $atom = qq{<link\nrel=alternate\ntitle="Atom feed"\n} .
449 qq!href="${upfx}t.atom"\ntype="application/atom+xml"/>!;
451 $rv .= _parent_headers_nosrch($hdr);
456 ("<html><head><title>". join(' - ', @title) . "</title>$atom".
457 PublicInbox::Hval::STYLE . "</head><body><pre>" . $rv);
461 my ($dst, $ctx, $hdr, $upfx) = @_;
462 my $srch = $ctx->{srch};
463 my $mid = mid_clean($hdr->header('Message-ID'));
464 my $res = $srch->get_thread($mid);
465 my $nr = $res->{total};
466 my $expand = "<a\nhref=\"${upfx}t/#u\">expand</a> " .
467 "/ <a\nhref=\"${upfx}t.mbox.gz\">mbox.gz</a>";
470 my $parent = in_reply_to($hdr);
472 if (defined $parent) {
473 $$dst .= "($expand)\n ";
474 $$dst .= ghost_parent("$upfx../", $parent) . "\n";
476 $$dst .= "[no followups, yet] ($expand)\n";
478 $ctx->{next_msg} = undef;
479 $ctx->{parent_msg} = $parent;
483 $$dst .= "~$nr messages ($expand";
484 if ($nr > MAX_INLINE_QUOTED) {
485 $$dst .= qq! / <a\nhref="#b">[scroll down]</a>!;
489 my $subj = $srch->subject_path($hdr->header('Subject'));
491 seen => { $subj => 1 },
494 parent_cmp => defined $parent ? $parent : '',
499 for (thread_results(load_results($res))->rootset) {
500 inline_dump($dst, $state, $upfx, $_, 0);
502 $$dst .= "<a\nid=b></a>"; # anchor for body start
503 $ctx->{next_msg} = $state->{next_msg};
504 $ctx->{parent_msg} = $state->{parent};
507 sub _parent_headers_nosrch {
511 my $irt = in_reply_to($hdr);
513 my $v = PublicInbox::Hval->new_msgid($irt, 1);
514 my $html = $v->as_html;
515 my $href = $v->as_href;
516 $rv .= "In-Reply-To: <";
517 $rv .= "<a\nhref=\"../$href/\">$html</a>>\n";
520 my $refs = $hdr->header('References');
522 # avoid redundant URLs wasting bandwidth
524 $seen{$irt} = 1 if defined $irt;
526 my @raw_refs = ($refs =~ /<([^>]+)>/g);
527 foreach my $ref (@raw_refs) {
530 push @refs, linkify_ref_nosrch($ref);
534 $rv .= 'References: '. join(' ', @refs) . "\n";
541 my ($hdr, $standalone, $full_pfx, $ctx) = @_;
542 my %cc; # everyone else
543 my $to; # this is the From address
545 foreach my $h (qw(From To Cc)) {
546 my $v = $hdr->header($h);
547 defined($v) && ($v ne '') or next;
548 my @addrs = Email::Address->parse($v);
549 foreach my $recip (@addrs) {
550 my $address = $recip->address;
551 my $dst = lc($address);
552 $cc{$dst} ||= $address;
556 Email::Address->purge_cache if $standalone;
558 my $subj = $hdr->header('Subject') || '';
559 $subj = "Re: $subj" unless $subj =~ /\bRe:/i;
560 my $mid = $hdr->header('Message-ID');
561 my $irt = uri_escape_utf8($mid);
563 $to = uri_escape_utf8($to);
564 $subj = uri_escape_utf8($subj);
566 my $cc = uri_escape_utf8(join(',', sort values %cc));
567 my $href = "mailto:$to?In-Reply-To=$irt&Cc=${cc}&Subject=$subj";
570 my $srch = $ctx->{srch} if $ctx;
571 my $upfx = $full_pfx ? '../' : '../../';
572 my $tpfx = $full_pfx ? '' : '../';
573 my $idx = $standalone ? " <a\nhref=\"$upfx\">index</a>" : '';
575 if ($srch && $standalone) {
576 $idx .= qq{ / follow: <a\nhref="${tpfx}t.atom">Atom feed</a>\n};
579 my $p = $ctx->{parent_msg};
580 my $next = $ctx->{next_msg};
582 $p = PublicInbox::Hval->new_oneline($p);
584 $irt = "<a\nhref=\"$upfx$p/\">parent</a> ";
586 $irt = ' ' x length('parent ');
589 $irt .= "<a\nhref=\"$upfx$next/\">next</a> ";
591 $irt .= ' ' x length('next ');
594 $irt .= "<a\nhref=\"${tpfx}t/#u\">thread</a> ";
596 $irt .= ' ' x length('thread ');
602 "$irt<a\nhref=\"" . ascii_html($href) . '">reply</a>' . $idx;
605 sub linkify_ref_nosrch {
606 my $v = PublicInbox::Hval->new_msgid($_[0], 1);
607 my $html = $v->as_html;
608 my $href = $v->as_href;
609 "<<a\nhref=\"../$href/\">$html</a>>";
615 if ($id !~ /\A[a-f0-9]{40}\z/) {
616 $id = id_compress(mid_clean($id), 1);
621 sub thread_html_head {
622 my ($cb, $header, $state) = @_;
623 $$cb = $$cb->([200, ['Content-Type'=> 'text/html; charset=UTF-8']]);
625 my $s = PublicInbox::Hval->new_oneline($header->header('Subject'));
627 $$cb->write("<html><head><title>$s</title>".
628 qq{<link\nrel=alternate\ntitle="Atom feed"\n} .
629 qq!href="../t.atom"\ntype="application/atom+xml"/>! .
630 PublicInbox::Hval::STYLE .
634 sub pre_anchor_entry {
635 my ($seen, $mime) = @_;
636 my $id = anchor_for($mime->header('Message-ID'));
637 $seen->{$id} = "#$id"; # save the anchor for children, later
641 my ($upfx, $mid) = @_;
642 # 'subject dummy' is used internally by Mail::Thread
643 return '[no common parent]' if ($mid eq 'subject dummy');
645 $mid = PublicInbox::Hval->new_msgid($mid);
646 my $href = $mid->as_href;
647 my $html = $mid->as_html;
648 qq{[parent not found: <<a\nhref="$upfx$href/">$html</a>>]};
651 sub thread_adj_level {
652 my ($fh, $state, $level) = @_;
654 my $max = $state->{cur_level};
656 return '' if $max == 0; # flat output
658 # reset existing lists
659 my $x = $max > 1 ? ('</ul></li>' x ($max - 1)) : '';
660 $fh->write($x . '</ul>');
661 $state->{cur_level} = 0;
664 if ($level == $max) { # continue existing list
666 } elsif ($level < $max) {
667 my $x = $max > 1 ? ('</ul></li>' x ($max - $level)) : '';
668 $fh->write($x .= '<li>');
669 $state->{cur_level} = $level;
670 } else { # ($level > $max) # start a new level
671 $state->{cur_level} = $level;
672 $fh->write(($max ? '<li>' : '') . '<ul><li>');
678 my ($fh, $state, $upfx, $mid, $level) = @_;
680 my $end = thread_adj_level($fh, $state, $level);
681 $fh->write('<pre>'. ghost_parent($upfx, $mid) . '</pre>' . $end);
685 my ($cb, $git, $state, $mime, $level) = @_;
687 # lazy load the full message from mini_mime:
689 my $path = mid2path(mid_clean($mime->header('Message-ID')));
690 Email::MIME->new($git->cat_file('HEAD:'.$path));
693 if ($state->{anchor_idx} == 0) {
694 thread_html_head($cb, $mime, $state, $level);
697 if (my $ghost = delete $state->{ghost}) {
698 # n.b. ghost messages may only be parents, not children
699 foreach my $g (@$ghost) {
700 ghost_flush($fh, $state, '../../', @$g);
703 my $end = thread_adj_level($fh, $state, $level);
704 index_entry($fh, $mime, $level, $state);
705 $fh->write($end) if $end;
712 INDENT x ($level - 1);
715 sub __ghost_prepare {
716 my ($state, $node, $level) = @_;
717 my $ghost = $state->{ghost} ||= [];
718 push @$ghost, [ $node->messageid, $level ];
722 my ($cb, $git, $state, $node, $level) = @_;
724 if (my $mime = $node->message) {
725 unless (__thread_entry($cb, $git, $state, $mime, $level)) {
726 __ghost_prepare($state, $node, $level);
729 __ghost_prepare($state, $node, $level);
732 thread_entry($cb, $git, $state, $node->child, $level + 1);
733 thread_entry($cb, $git, $state, $node->next, $level);
739 [ map { $_->mini_mime } @{delete $res->{msgs}} ];
744 my $ts = eval { str2time($hdr->header('Date')) };
745 defined($ts) ? $ts : 0;
749 my ($msgs, $nosubject) = @_;
750 require PublicInbox::Thread;
751 my $th = PublicInbox::Thread->new(@$msgs);
753 $Mail::Thread::nosubject = $nosubject;
755 $th->order(*sort_ts);
761 require PublicInbox::ExtMsg;
763 $cb->(PublicInbox::ExtMsg::ext_msg($ctx))
768 my $ts = $hdr->header('X-PI-TS') || msg_timestamp($hdr);
772 sub fmt_ts { POSIX::strftime('%Y-%m-%d %k:%M', gmtime($_[0])) }
775 my ($dst, $state, $upfx, $hdr, $level) = @_;
776 my $dot = $level == 0 ? '' : '` ';
778 my $cur = $state->{cur};
779 my $mid = mid_clean($hdr->header('Message-ID'));
780 my $f = $hdr->header('X-PI-From');
781 my $d = _msg_date($hdr);
782 $f = PublicInbox::Hval->new_oneline($f)->as_html;
783 my $pfx = ' ' . $d . ' ' . indent_for($level);
785 $state->{first_level} ||= $level;
787 if ($attr ne $state->{prev_attr} || $state->{prev_level} > $level) {
788 $state->{prev_attr} = $attr;
792 $state->{prev_level} = $level;
796 delete $state->{cur};
797 $$dst .= "$pfx$dot<b><a\nid=r\nhref=\"#b\">".
798 "$attr [this message]</a></b>\n";
803 $state->{next_msg} ||= $mid;
806 # Subject is never undef, this mail was loaded from
807 # our Xapian which would've resulted in '' if it were
808 # really missing (and Filter rejects empty subjects)
809 my $s = $hdr->header('Subject');
810 my $h = $state->{srch}->subject_path($s);
811 if ($state->{seen}->{$h}) {
814 $state->{seen}->{$h} = 1;
815 $s = PublicInbox::Hval->new($s);
818 my $m = PublicInbox::Hval->new_msgid($mid);
819 $m = $upfx . '../' . $m->as_href . '/';
821 $$dst .= "$pfx$dot<a\nhref=\"$m\">$s</a> $attr\n";
823 $$dst .= "$pfx$dot<a\nhref=\"$m\">$f</a>\n";
828 my ($dst, $state, $upfx, $node, $level) = @_;
830 if (my $mime = $node->message) {
831 my $hdr = $mime->header_obj;
832 my $mid = mid_clean($hdr->header('Message-ID'));
833 if ($mid eq $state->{parent_cmp}) {
834 $state->{parent} = $mid;
836 _inline_header($dst, $state, $upfx, $hdr, $level);
838 my $dot = $level == 0 ? '' : '` ';
839 my $pfx = (' ' x length(' 1970-01-01 13:37 ')).
840 indent_for($level) . $dot;
842 $$dst .= ghost_parent("$upfx../", $node->messageid) . "\n";
844 inline_dump($dst, $state, $upfx, $node->child, $level+1);
845 inline_dump($dst, $state, $upfx, $node->next, $level);
850 (eval { $a->topmost->message->header('X-PI-TS') } || 0) <=>
851 (eval { $b->topmost->message->header('X-PI-TS') } || 0)
857 (eval { $b->topmost->message->header('X-PI-TS') } || 0) <=>
858 (eval { $a->topmost->message->header('X-PI-TS') } || 0)
862 # accumulate recent topics if search is supported
863 # returns 1 if done, undef if not
865 my ($state, $node, $level) = @_;
867 my $child_adjust = 1;
869 if (my $x = $node->message) {
873 $subj = $x->header('Subject');
874 $subj = $state->{srch}->subject_normalized($subj);
876 if (++$state->{subjs}->{$subj} == 1) {
877 push @{$state->{order}}, [ $level, $subj ];
880 my $mid = mid_clean($x->header('Message-ID'));
882 my $ts = $x->header('X-PI-TS');
883 my $exist = $state->{latest}->{$subj};
884 if (!$exist || $exist->[1] < $ts) {
885 $state->{latest}->{$subj} = [ $mid, $ts ];
888 # ghost message, do not bump level
892 add_topic($state, $node->child, $level + $child_adjust);
893 add_topic($state, $node->next, $level);
898 my $order = $state->{order};
899 my $subjs = $state->{subjs};
900 my $latest = $state->{latest};
901 return "\n[No topics in range]</pre>" unless (scalar @$order);
906 while (defined(my $info = shift @$order)) {
907 my ($level, $subj) = @$info;
908 my $n = delete $subjs->{$subj};
909 my ($mid, $ts) = @{delete $latest->{$subj}};
910 $mid = PublicInbox::Hval->new_msgid($mid)->as_href;
911 $subj = PublicInbox::Hval->new($subj)->as_html;
912 $pfx = indent_for($level);
913 my $nl = $level == $prev ? "\n" : '';
914 my $dot = $level == 0 ? '' : '` ';
915 $dst .= "$nl$pfx$dot<a\nhref=\"$mid/t/#u\"><b>$subj</b></a>\n";
921 # $n isn't the total number of posts on the topic,
922 # just the number of posts in the current results
923 # window, so leave it unlabeled
924 $n = $n == 1 ? '' : " ($n+ messages)";
926 if ($level == 0 || $attr ne $prev_attr) {
927 my $mbox = qq(<a\nhref="$mid/t.mbox.gz">mbox.gz</a>);
928 my $atom = qq(<a\nhref="$mid/t.atom">Atom</a>);
929 $pfx .= INDENT if $level > 0;
930 $dst .= $pfx . $attr . $n . " - $mbox / $atom\n";
937 sub emit_index_topics {
938 my ($state, $fh) = @_;
939 my $off = $state->{ctx}->{cgi}->param('o');
940 $off = 0 unless defined $off;
941 $state->{order} = [];
942 $state->{subjs} = {};
943 $state->{latest} = {};
945 my %opts = ( offset => int $off, limit => $max * 4 );
946 while (scalar @{$state->{order}} < $max) {
947 my $res = $state->{srch}->query('', \%opts);
948 my $nr = scalar @{$res->{msgs}} or last;
950 for (rsort_ts(thread_results(load_results($res), 1)->rootset)) {
951 add_topic($state, $_, 0);
953 $opts{offset} += $nr;
956 $fh->write(dump_topics($state));