+ for my $num (@$nums) { # there should only be one...
+ my $doc = $xdb->get_document($self->num2docid($num));
+ my $x = xap_terms('K', $doc);
+ %kw = (%kw, %$x);
+ }
+ \%kw;
+}
+
+# returns undef if blob is unknown
+sub oidbin_keywords {
+ my ($self, $oidbin) = @_;
+ my @num = $self->over->oidbin_exists($oidbin) or return;
+ $self->retry_reopen(\&_oid_kw, \@num);
+}
+
+sub _xsmsg_vmd { # retry_reopen
+ my ($self, $smsg, $want_label) = @_;
+ my $xdb = $self->xdb; # set {nshard};
+ my (%kw, %L, $doc, $x);
+ $kw{flagged} = 1 if delete($smsg->{lei_q_tt_flagged});
+ my @num = $self->over->blob_exists($smsg->{blob});
+ for my $num (@num) { # there should only be one...
+ $doc = $xdb->get_document($self->num2docid($num));
+ $x = xap_terms('K', $doc);
+ %kw = (%kw, %$x);
+ if ($want_label) { # JSON/JMAP only
+ $x = xap_terms('L', $doc);
+ %L = (%L, %$x);
+ }
+ }
+ $smsg->{kw} = [ sort keys %kw ] if scalar(keys(%kw));
+ $smsg->{L} = [ sort keys %L ] if scalar(keys(%L));
+}
+
+# lookup keywords+labels for external messages
+sub xsmsg_vmd {
+ my ($self, $smsg, $want_label) = @_;
+ return if $smsg->{kw}; # already set by LeiXSearch->mitem_kw
+ eval { $self->retry_reopen(\&_xsmsg_vmd, $smsg, $want_label) };
+ warn "$$ $0 (nshard=$self->{nshard}) $smsg->{blob}: $@" if $@;
+}
+
+# when a message has no Message-IDs at all, this is needed for
+# unsent Draft messages, at least
+sub content_key ($) {
+ my ($eml) = @_;
+ my $dig = content_digest($eml);
+ my $chash = $dig->clone->digest;
+ my $mids = mids_for_index($eml);
+ unless (@$mids) {
+ $eml->{-lei_fake_mid} = $mids->[0] =
+ PublicInbox::Import::digest2mid($dig, $eml, 0);
+ }
+ ($chash, $mids);
+}
+
+sub _cmp_1st { # git->cat_async callback
+ my ($bref, $oid, $type, $size, $cmp) = @_;
+ # cmp: [chash, xoids, smsg, lms]
+ $bref //= $cmp->[3] ? $cmp->[3]->local_blob($oid, 1) : undef;
+ if ($bref && content_hash(PublicInbox::Eml->new($bref)) eq $cmp->[0]) {
+ $cmp->[1]->{$oid} = $cmp->[2]->{num};
+ }
+}
+
+# returns { OID => num } mapping for $eml matches
+# The `num' hash value only makes sense from LeiSearch itself
+# and is nonsense from the PublicInbox::LeiALE subclass
+sub xoids_for {
+ my ($self, $eml, $min) = @_;
+ my ($chash, $mids) = content_key($eml);
+ my @overs = ($self->over // $self->overs_all);
+ my $git = $self->git;
+ my $xoids = {};
+ # no lms when used via {ale}:
+ my $lms = $self->{-lms_ro} //= lms($self) if defined($self->{topdir});
+ for my $mid (@$mids) {
+ for my $o (@overs) {
+ my ($id, $prev);
+ while (my $cur = $o->next_by_mid($mid, \$id, \$prev)) {
+ next if $cur->{bytes} == 0 ||
+ $xoids->{$cur->{blob}};
+ $git->cat_async($cur->{blob}, \&_cmp_1st,
+ [$chash, $xoids, $cur, $lms]);
+ if ($min && scalar(keys %$xoids) >= $min) {
+ $git->async_wait_all;
+ return $xoids;
+ }
+ }
+ }
+ }
+ $git->async_wait_all;
+
+ # it could be an 'lei index'-ed file that just got renamed
+ if (scalar(keys %$xoids) < ($min // 1) && defined($self->{topdir})) {
+ my $hex = git_sha(1, $eml)->hexdigest;
+ my @n = $overs[0]->blob_exists($hex);
+ for (@n) { $xoids->{$hex} //= $_ }
+ }
+ scalar(keys %$xoids) ? $xoids : undef;
+}
+
+# returns true if $eml is indexed by lei/store and keywords don't match
+sub kw_changed {
+ my ($self, $eml, $new_kw_sorted, $docids) = @_;
+ my $cur_kw;
+ if ($eml) {
+ my $xoids = xoids_for($self, $eml) // return;
+ $docids //= [];
+ @$docids = sort { $a <=> $b } values %$xoids;
+ if (!@$docids && $self->over) {
+ my $bin = git_sha(1, $eml)->digest;
+ @$docids = $self->over->oidbin_exists($bin);