miscsearch: index UIDVALIDITY, use as startup cache

[public-inbox.git] / lib / PublicInbox / MiscSearch.pm

diff --git a/lib/PublicInbox/MiscSearch.pm b/lib/PublicInbox/MiscSearch.pm
index de587d352ca77f6bf0bfc60cda4a24bd661a3b9d..c6ce255fc90ffebe94aba7d2de4619d28ad7ae3c 100644 (file)
--- a/lib/PublicInbox/MiscSearch.pm
+++ b/lib/PublicInbox/MiscSearch.pm
@@ -5,10 +5,12 @@
 package PublicInbox::MiscSearch;
 use strict;
 use v5.10.1;
-use PublicInbox::Search qw(retry_reopen);
+use PublicInbox::Search qw(retry_reopen int_val);
+my $json;
 
 # Xapian value columns:
 our $MODIFIED = 0;
+our $UIDVALIDITY = 1; # (created time)
 
 # avoid conflicting with message Search::prob_prefix for UI/UX reasons
 my %PROB_PREFIX = (
@@ -24,6 +26,7 @@ my %PROB_PREFIX = (
 sub new {
        my ($class, $dir) = @_;
        PublicInbox::Search::load_xapian();
+       $json //= PublicInbox::Config::json();
        bless {
                xdb => $PublicInbox::Search::X{Database}->new($dir)
        }, $class;
@@ -120,11 +123,13 @@ sub newsgroup_matches {
 sub ibx_data_once {
        my ($self, $ibx) = @_;
        my $xdb = $self->{xdb};
-       my $eidx_key = $ibx->eidx_key; # may be {inboxdir}, so private
-       my $head = $xdb->postlist_begin('Q'.$eidx_key);
-       my $tail = $xdb->postlist_end('Q'.$eidx_key);
+       my $term = 'Q'.$ibx->eidx_key; # may be {inboxdir}, so private
+       my $head = $xdb->postlist_begin($term);
+       my $tail = $xdb->postlist_end($term);
        if ($head != $tail) {
                my $doc = $xdb->get_document($head->get_docid);
+               $ibx->{uidvalidity} //= int_val($doc, $UIDVALIDITY);
+               $ibx->{-modified} = int_val($doc, $MODIFIED);
                $doc->get_data;
        } else {
                undef;
@@ -136,4 +141,47 @@ sub inbox_data {
        retry_reopen($self, \&ibx_data_once, $ibx);
 }
 
+sub ibx_cache_load {
+       my ($doc, $cache) = @_;
+       my $end = $doc->termlist_end;
+       my $cur = $doc->termlist_begin;
+       $cur->skip_to('Q');
+       return if $cur == $end;
+       my $eidx_key = $cur->get_termname;
+       $eidx_key =~ s/\AQ// or return; # expired
+       my $ce = $cache->{$eidx_key} = {};
+       $ce->{uidvalidity} = int_val($doc, $UIDVALIDITY);
+       $ce->{-modified} = int_val($doc, $MODIFIED);
+       $ce->{description} = do {
+               # extract description from manifest.js.gz epoch description
+               my $d;
+               my $data = $json->decode($doc->get_data);
+               for (values %$data) {
+                       $d = $_->{description} // next;
+                       $d =~ s/ \[epoch [0-9]+\]\z// or next;
+                       last;
+               }
+               $d;
+       }
+}
+
+sub _nntpd_cache_load { # retry_reopen callback
+       my ($self) = @_;
+       my $opt = { limit => $self->{xdb}->get_doccount * 10, relevance => -1 };
+       my $mset = mset($self, 'type:newsgroup type:inbox', $opt);
+       my $cache = {};
+       for my $it ($mset->items) {
+               ibx_cache_load($it->get_document, $cache);
+       }
+       $cache
+}
+
+# returns { newsgroup => $cache_entry } mapping, $cache_entry contains
+# anything which may trigger seeks at startup, currently: description,
+# -modified, and uidvalidity.
+sub nntpd_cache_load {
+       my ($self) = @_;
+       retry_reopen($self, \&_nntpd_cache_load);
+}
+
 1;