miscsearch: implement ->newsgroup_matches

This may be used to speed up newsgroup searches down-the-line,
but the grep perlop isn't too shabby, at the moment.

diff --git a/lib/PublicInbox/MiscSearch.pm b/lib/PublicInbox/MiscSearch.pm
index 48ef6914fe8be2d6ab82ab5498ac2a9a0f556462..f2e3144303d39fdc02c1cfbed172529ed955078b 100644 (file)
--- a/lib/PublicInbox/MiscSearch.pm
+++ b/lib/PublicInbox/MiscSearch.pm
@@ -76,6 +76,46 @@ sub mset {
        retry_reopen($self, \&misc_enquire_once, $qr, $opt);
 }
 
+sub ibx_matches_once { # retry_reopen callback
+       my ($self, $qr, $by_newsgroup) = @_;
+       # double in case no newsgroups are configured:
+       my $limit = scalar(keys %$by_newsgroup) * 2;
+       my $opt = { limit => $limit, offset => 0, relevance => -1 };
+       my $ret = {}; # newsgroup => $ibx of matches
+       while (1) {
+               my $mset = misc_enquire_once($self, $qr, $opt);
+               for my $mi ($mset->items) {
+                       my $doc = $mi->get_document;
+                       my $end = $doc->termlist_end;
+                       my $cur = $doc->termlist_begin;
+                       $cur->skip_to('Q');
+                       if ($cur != $end) {
+                               my $ng = $cur->get_termname; # eidx_key
+                               $ng =~ s/\AQ// or warn "BUG: no `Q': $ng";
+                               if (my $ibx = $by_newsgroup->{$ng}) {
+                                       $ret->{$ng} = $ibx;
+                               }
+                       } else {
+                               warn <<EOF;
+W: docid=${\$mi->get_docid} has no `Q' (eidx_key) term
+EOF
+                       }
+               }
+               my $nr = $mset->size;
+               return $ret if $nr < $limit;
+               $opt->{offset} += $nr;
+       }
+}
+
+# returns a newsgroup => PublicInbox::Inbox mapping
+sub newsgroup_matches {
+       my ($self, $qs, $pi_cfg) = @_;
+       my $qp = $self->{qp} //= mi_qp_new($self);
+       $qs .= ' type:inbox';
+       my $qr = $qp->parse_query($qs, $PublicInbox::Search::QP_FLAGS);
+       retry_reopen($self, \&ibx_matches_once, $qr, $pi_cfg->{-by_newsgroup});
+}
+
 sub ibx_data_once {
        my ($self, $ibx) = @_;
        my $xdb = $self->{xdb};

diff --git a/t/extsearch.t b/t/extsearch.t
index 0045294b446b38584d28f0bb5bb8a97d552b7cb0..85cdf74a783af7a0d38ced396fea781d7ad32f8a 100644 (file)
--- a/t/extsearch.t
+++ b/t/extsearch.t
@@ -79,5 +79,9 @@ my @it = $misc->mset('')->items;
 is(scalar(@it), 2, 'two inboxes');
 like($it[0]->get_document->get_data, qr/v2test/, 'docdata matched v2');
 like($it[1]->get_document->get_data, qr/v1test/, 'docdata matched v1');
+my $pi_cfg = PublicInbox::Config->new;
+$pi_cfg->fill_all;
+my $ret = $misc->newsgroup_matches('', $pi_cfg);
+is_deeply($pi_cfg->{-by_newsgroup}, $ret, '->newsgroup_matches');
 
 done_testing;