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# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# Used for generating Atom feeds for web-accessible mailing list archives.
package PublicInbox::Feed;
use strict;
use v5.10.1;
use PublicInbox::View;
use PublicInbox::WwwAtomStream;
use PublicInbox::Smsg; # this loads w/o Search::Xapian
sub generate_i {
my ($ctx) = @_;
shift @{$ctx->{msgs}};
}
# main function
sub generate {
my ($ctx) = @_;
my $msgs = $ctx->{msgs} = recent_msgs($ctx);
return _no_thread() unless @$msgs;
PublicInbox::WwwAtomStream->response($ctx, 200, \&generate_i);
}
sub generate_thread_atom {
my ($ctx) = @_;
my $msgs = $ctx->{msgs} = $ctx->{ibx}->over->get_thread($ctx->{mid});
return _no_thread() unless @$msgs;
PublicInbox::WwwAtomStream->response($ctx, 200, \&generate_i);
}
sub generate_html_index {
my ($ctx) = @_;
# if the 'r' query parameter is given, it is a legacy permalink
# which we must continue supporting:
my $qp = $ctx->{qp};
my $ibx = $ctx->{ibx};
if ($qp && !$qp->{r} && $ibx->over) {
return PublicInbox::View::index_topics($ctx);
}
my $env = $ctx->{env};
my $url = $ibx->base_url($env) . 'new.html';
my $qs = $env->{QUERY_STRING};
$url .= "?$qs" if $qs ne '';
[302, [ 'Location', $url, 'Content-Type', 'text/plain'],
[ "Redirecting to $url\n" ] ];
}
sub new_html_i {
my ($ctx, $eml) = @_;
$ctx->zmore($ctx->html_top) if exists $ctx->{-html_tip};
$eml and return PublicInbox::View::eml_entry($ctx, $eml);
my $smsg = shift @{$ctx->{msgs}} or
$ctx->zmore(PublicInbox::View::pagination_footer(
$ctx, './new.html'));
$smsg;
}
sub new_html {
my ($ctx) = @_;
my $msgs = $ctx->{msgs} = recent_msgs($ctx);
if (!@$msgs) {
return [404, ['Content-Type', 'text/plain'],
["No messages, yet\n"] ];
}
$ctx->{-html_tip} = '<pre>';
$ctx->{-upfx} = '';
$ctx->{-hr} = 1;
PublicInbox::WwwStream::aresponse($ctx, 200, \&new_html_i);
}
# private subs
sub _no_thread () {
[404, ['Content-Type', 'text/plain'], ["No feed found for thread\n"]];
}
sub recent_msgs {
my ($ctx) = @_;
my $ibx = $ctx->{ibx};
my $max = $ibx->{feedmax} // 25;
return PublicInbox::View::paginate_recent($ctx, $max) if $ibx->over;
# only for rare v1 inboxes which aren't indexed at all
my $qp = $ctx->{qp};
my $hex = '[a-f0-9]';
my $addmsg = qr!^:000000 100644 \S+ (\S+) A\t${hex}{2}/${hex}{38}$!;
my $delmsg = qr!^:100644 000000 (\S+) \S+ D\t(${hex}{2}/${hex}{38})$!;
my $refhex = qr/(?:HEAD|${hex}{4,})(?:~[0-9]+)?/;
# revision ranges may be specified
my $range = 'HEAD';
my $r = $qp->{r} if $qp;
if ($r && ($r =~ /\A(?:$refhex\.\.)?$refhex\z/o)) {
$range = $r;
}
# get recent messages
# we could use git log -z, but, we already know ssoma will not
# leave us with filenames with spaces in them..
my $log = $ibx->git->popen(qw/log
--no-notes --no-color --raw -r
--no-abbrev --abbrev-commit/,
"--format=%H", $range);
my %deleted; # only an optimization at this point
my $last;
my $last_commit;
local $/ = "\n";
my @ret;
while (defined(my $line = <$log>)) {
if ($line =~ /$addmsg/o) {
my $add = $1;
next if $deleted{$add}; # optimization-only
push(@ret, bless { blob => $add }, 'PublicInbox::Smsg');
if (scalar(@ret) >= $max) {
$last = 1;
last;
}
} elsif ($line =~ /$delmsg/o) {
$deleted{$1} = 1;
}
}
if ($last) {
local $/ = "\n";
while (my $line = <$log>) {
if ($line =~ /^(${hex}{7,})/) {
$last_commit = $1;
last;
}
}
}
$last_commit and
$ctx->{next_page} = qq[<a\nhref="?r=$last_commit"\nrel=next>] .
'next (older)</a>';
\@ret;
}
1;
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