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| | # Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# read-only counterpart to MiscIdx
package PublicInbox::MiscSearch;
use strict;
use v5.10.1;
use PublicInbox::Search qw(retry_reopen int_val xap_terms);
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 = (
description => 'S', # $INBOX_DIR/description
address => 'A',
listid => 'XLISTID',
url => 'XURL',
infourl => 'XINFOURL',
name => 'XNAME',
'' => 'S A XLISTID XNAME XURL XINFOURL'
);
sub new {
my ($class, $dir) = @_;
PublicInbox::Search::load_xapian();
$json //= PublicInbox::Config::json();
bless {
xdb => $PublicInbox::Search::X{Database}->new($dir)
}, $class;
}
# read-only
sub mi_qp_new ($) {
my ($self) = @_;
my $xdb = $self->{xdb};
my $qp = $PublicInbox::Search::X{QueryParser}->new;
$qp->set_default_op(PublicInbox::Search::OP_AND());
$qp->set_database($xdb);
$qp->set_stemmer(PublicInbox::Search::stemmer($self));
$qp->set_stemming_strategy(PublicInbox::Search::STEM_SOME());
my $cb = $qp->can('set_max_wildcard_expansion') //
$qp->can('set_max_expansion'); # Xapian 1.5.0+
$cb->($qp, 100);
$cb = $qp->can('add_valuerangeprocessor') //
$qp->can('add_rangeprocessor'); # Xapian 1.5.0+
while (my ($name, $prefix) = each %PROB_PREFIX) {
$qp->add_prefix($name, $_) for split(/ /, $prefix);
}
$qp->add_boolean_prefix('type', 'T');
$qp;
}
sub misc_enquire_once { # retry_reopen callback
my ($self, $qr, $opt) = @_;
my $eq = $PublicInbox::Search::X{Enquire}->new($self->{xdb});
$eq->set_query($qr);
my $desc = !$opt->{asc};
my $rel = $opt->{relevance} // 0;
if ($rel == -1) { # ORDER BY docid
$eq->set_docid_order($PublicInbox::Search::ENQ_ASCENDING);
$eq->set_weighting_scheme($PublicInbox::Search::X{BoolWeight}->new);
} elsif ($rel) {
$eq->set_sort_by_relevance_then_value($MODIFIED, $desc);
} else {
$eq->set_sort_by_value_then_relevance($MODIFIED, $desc);
}
$eq->get_mset($opt->{offset} || 0, $opt->{limit} || 200);
}
sub mset {
my ($self, $qs, $opt) = @_;
$opt ||= {};
reopen($self);
my $qp = $self->{qp} //= mi_qp_new($self);
$qs = 'type:inbox' if $qs eq '';
my $qr = $qp->parse_query($qs, $PublicInbox::Search::QP_FLAGS);
$opt->{relevance} = 1 unless exists $opt->{relevance};
retry_reopen($self, \&misc_enquire_once, $qr, $opt);
}
sub ibx_data_once {
my ($self, $ibx) = @_;
my $xdb = $self->{xdb};
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);
$doc->get_data;
} else {
undef;
}
}
sub doc2ibx_cache_ent { # @_ == ($self, $doc) OR ($doc)
my ($doc) = $_[-1];
my $d;
my $data = $json->decode($doc->get_data);
for (values %$data) {
$d = $_->{description} // next;
$d =~ s/ \[epoch [0-9]+\]\z// or next;
last;
}
{
uidvalidity => int_val($doc, $UIDVALIDITY),
-modified => int_val($doc, $MODIFIED),
# extract description from manifest.js.gz epoch description
description => $d
};
}
sub inbox_data {
my ($self, $ibx) = @_;
retry_reopen($self, \&ibx_data_once, $ibx);
}
sub ibx_cache_load {
my ($doc, $cache) = @_;
my ($eidx_key) = xap_terms('Q', $doc);
return unless defined($eidx_key); # expired
$cache->{$eidx_key} = doc2ibx_cache_ent($doc);
}
sub _nntpd_cache_load { # retry_reopen callback
my ($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);
}
no warnings 'once';
*reopen = \&PublicInbox::Search::reopen;
1;
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