# Copyright (C) 2020-2021 all contributors
# License: AGPL-3.0+
# read-only counterpart for PublicInbox::LeiStore
package PublicInbox::LeiSearch;
use strict;
use v5.10.1;
use parent qw(PublicInbox::ExtSearch);
use PublicInbox::Search qw(xap_terms);
use PublicInbox::ContentHash qw(content_digest content_hash);
use PublicInbox::MID qw(mids mids_in);
# get combined docid from over.num:
# (not generic Xapian, only works with our sharding scheme)
sub num2docid ($$) {
my ($self, $num) = @_;
my $nshard = $self->{nshard};
($num - 1) * $nshard + $num % $nshard + 1;
}
sub msg_keywords {
my ($self, $num) = @_; # num_or_mitem
my $xdb = $self->xdb; # set {nshard};
my $docid = ref($num) ? $num->get_docid : num2docid($self, $num);
my $kw = xap_terms('K', $xdb, $docid);
warn "E: #$docid ($num): $@\n" if $@;
wantarray ? sort(keys(%$kw)) : $kw;
}
# when a message has no Message-IDs at all, this is needed for
# unsent Draft messages, at least
sub content_key ($) {
my ($eml) = @_;
my $dig = content_digest($eml);
my $chash = $dig->clone->digest;
my $mids = mids_in($eml,
qw(Message-ID X-Alt-Message-ID Resent-Message-ID));
unless (@$mids) {
$eml->{-lei_fake_mid} = $mids->[0] =
PublicInbox::Import::digest2mid($dig, $eml);
}
($chash, $mids);
}
sub _cmp_1st { # git->cat_async callback
my ($bref, $oid, $type, $size, $cmp) = @_; # cmp: [chash, found, smsg]
return if defined($cmp->[1]->[0]); # $found->[0]
if (content_hash(PublicInbox::Eml->new($bref)) eq $cmp->[0]) {
push @{$cmp->[1]}, $cmp->[2]->{num};
}
}
# returns true if $eml is indexed by lei/store and keywords don't match
sub kw_changed {
my ($self, $eml, $new_kw_sorted) = @_;
my ($chash, $mids) = content_key($eml);
my $over = $self->over;
my $git = $self->git;
my $found = [];
for my $mid (@$mids) {
my ($id, $prev);
while (my $cur = $over->next_by_mid($mid, \$id, \$prev)) {
$git->cat_async($cur->{blob}, \&_cmp_1st,
[ $chash, $found, $cur ]);
last if scalar(@$found);
}
}
$git->cat_async_wait;
my $num = $found->[0] // return;
my @cur_kw = msg_keywords($self, $num);
join("\0", @$new_kw_sorted) eq join("\0", @cur_kw) ? 0 : 1;
}
1;