# Copyright (C) 2020-2021 all contributors
# License: AGPL-3.0+
# Read-only external (detached) index for cross inbox search.
# This is a read-only counterpart to PublicInbox::ExtSearchIdx
# and behaves like PublicInbox::Inbox AND PublicInbox::Search
package PublicInbox::ExtSearch;
use strict;
use v5.10.1;
use PublicInbox::Over;
use PublicInbox::Inbox;
use PublicInbox::MiscSearch;
use DBI qw(:sql_types); # SQL_BLOB
# for ->reopen, ->mset, ->mset_to_artnums
use parent qw(PublicInbox::Search);
sub new {
my ($class, $topdir) = @_;
bless {
topdir => $topdir,
-primary_address => 'unknown@example.com',
# xpfx => 'ei15'
xpfx => "$topdir/ei".PublicInbox::Search::SCHEMA_VERSION
}, $class;
}
sub misc {
my ($self) = @_;
$self->{misc} //= PublicInbox::MiscSearch->new("$self->{xpfx}/misc");
}
# same as per-inbox ->over, for now...
sub over {
my ($self) = @_;
$self->{over} //= do {
PublicInbox::Inbox::_cleanup_later($self);
PublicInbox::Over->new("$self->{xpfx}/over.sqlite3");
};
}
sub git {
my ($self) = @_;
$self->{git} //= do {
PublicInbox::Inbox::_cleanup_later($self);
PublicInbox::Git->new("$self->{topdir}/ALL.git");
};
}
# returns a hashref of { $NEWSGROUP_NAME => $ART_NO } using the `xref3' table
sub nntp_xref_for { # NNTP only
my ($self, $xibx, $xsmsg) = @_;
my $dbh = over($self)->dbh;
my $sth = $dbh->prepare_cached(<<'', undef, 1);
SELECT ibx_id FROM inboxes WHERE eidx_key = ? LIMIT 1
$sth->execute($xibx->{newsgroup});
my $xibx_id = $sth->fetchrow_array // do {
warn "W: `$xibx->{newsgroup}' not found in $self->{topdir}\n";
return;
};
$sth = $dbh->prepare_cached(<<'', undef, 1);
SELECT docid FROM xref3 WHERE oidbin = ? AND xnum = ? AND ibx_id = ? LIMIT 1
$sth->bind_param(1, $xsmsg->oidbin, SQL_BLOB);
# NNTP::cmd_over can set {num} to zero according to RFC 3977 8.3.2
$sth->bind_param(2, $xsmsg->{num} || $xsmsg->{-orig_num});
$sth->bind_param(3, $xibx_id);
$sth->execute;
my $docid = $sth->fetchrow_array // do {
warn <{newsgroup}:$xsmsg->{num}' not found in $self->{topdir}"
EOF
return;
};
# LIMIT is number of newsgroups on server:
$sth = $dbh->prepare_cached(<<'', undef, 1);
SELECT ibx_id,xnum FROM xref3 WHERE docid = ? AND ibx_id != ?
$sth->execute($docid, $xibx_id);
my $rows = $sth->fetchall_arrayref;
my $eidx_key_sth = $dbh->prepare_cached(<<'', undef, 1);
SELECT eidx_key FROM inboxes WHERE ibx_id = ? LIMIT 1
my %xref = map {
my ($ibx_id, $xnum) = @$_;
$eidx_key_sth->execute($ibx_id);
my $eidx_key = $eidx_key_sth->fetchrow_array;
# only include if there's a newsgroup name
$eidx_key && index($eidx_key, '/') >= 0 ?
() : ($eidx_key => $xnum)
} @$rows;
$xref{$xibx->{newsgroup}} = $xsmsg->{num};
\%xref;
}
sub mm { undef }
sub altid_map { {} }
sub description {
my ($self) = @_;
($self->{description} //=
PublicInbox::Inbox::cat_desc("$self->{topdir}/description")) //
'$EXTINDEX_DIR/description missing';
}
sub search {
PublicInbox::Inbox::_cleanup_later($_[0]);
$_[0];
}
no warnings 'once';
*base_url = \&PublicInbox::Inbox::base_url;
*smsg_eml = \&PublicInbox::Inbox::smsg_eml;
*smsg_by_mid = \&PublicInbox::Inbox::smsg_by_mid;
*msg_by_mid = \&PublicInbox::Inbox::msg_by_mid;
*modified = \&PublicInbox::Inbox::modified;
*recent = \&PublicInbox::Inbox::recent;
*max_git_epoch = *nntp_usable = *msg_by_path = \&mm; # undef
*isrch = \&search;
1;