X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FSearch.pm;h=b739faf1a50c7eae1ae781078a0621fa71e648c4;hb=6e0659d2ae455fb28d433fd8c71b563210a3997a;hp=c18e19d4d4b45a3804c2d6f779ba5c8adcfe48d0;hpb=5301a9d1b07ad5af1b62df870b7181461603f460;p=public-inbox.git

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index c18e19d4..b739faf1 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -18,9 +18,9 @@ use constant {
 	# added for public-inbox 1.6.0+
 	BYTES => 3, # IMAP RFC822.SIZE
 	UID => 4, # IMAP UID == NNTP article number == Xapian docid
+	THREADID => 5, # RFC 8474, RFC 8621
 
 	# TODO
-	# THREADID => ?
 	# REPLYCNT => ?, # IMAP ANSWERED
 
 	# SCHEMA_VERSION history
@@ -47,26 +47,40 @@ use constant {
 	#      public-inbox v1.5.0 adds (still SCHEMA_VERSION=15):
 	#      * "lid:" and "l:" for List-Id searches
 	#
-	#      v1.6.0 adds BYTES and UID values
+	#      v1.6.0 adds BYTES, UID and THREADID values
 	SCHEMA_VERSION => 15,
 };
 
 use PublicInbox::Smsg;
 use PublicInbox::Over;
 my $QP_FLAGS;
-our %X = map { $_ => 0 } qw(BoolWeight Database Enquire
-			NumberValueRangeProcessor QueryParser Stem);
+our %X = map { $_ => 0 } qw(BoolWeight Database Enquire QueryParser Stem);
 our $Xap; # 'Search::Xapian' or 'Xapian'
+my $NVRP; # '$Xap::'.('NumberValueRangeProcessor' or 'NumberRangeProcessor')
 my $ENQ_ASCENDING;
 
 sub load_xapian () {
 	return 1 if defined $Xap;
-	for my $x (qw(Search::Xapian Xapian)) {
+	# n.b. PI_XAPIAN is intended for development use only.  We still
+	# favor Search::Xapian since that's what's available in current
+	# Debian stable (10.x) and derived distros.
+	for my $x (($ENV{PI_XAPIAN} // 'Search::Xapian'), 'Xapian') {
 		eval "require $x";
 		next if $@;
 
 		$x->import(qw(:standard));
 		$Xap = $x;
+
+		# `version_string' was added in Xapian 1.1
+		my $xver = eval('v'.eval($x.'::version_string()')) //
+				eval('v'.eval($x.'::xapian_version_string()'));
+
+		# NumberRangeProcessor was added in Xapian 1.3.6,
+		# NumberValueRangeProcessor was removed for 1.5.0+,
+		# favor the older /Value/ variant since that's what our
+		# (currently) preferred Search::Xapian supports
+		$NVRP = $x.'::'.($x eq 'Xapian' && $xver ge v1.5 ?
+			'NumberRangeProcessor' : 'NumberValueRangeProcessor');
 		$X{$_} = $Xap.'::'.$_ for (keys %X);
 
 		# ENQ_ASCENDING doesn't seem exported by SWIG Xapian.pm,
@@ -311,6 +325,12 @@ sub _do_enquire {
 	retry_reopen($self, \&_enquire_once, [ $self, $query, $opts ]);
 }
 
+# returns true if all docs have the THREADID value
+sub has_threadid ($) {
+	my ($self) = @_;
+	(xdb($self)->get_metadata('has_threadid') // '') eq '1';
+}
+
 sub _enquire_once { # retry_reopen callback
 	my ($self, $query, $opts) = @{$_[0]};
 	my $xdb = xdb($self);
@@ -326,6 +346,12 @@ sub _enquire_once { # retry_reopen callback
 	} else {
 		$enquire->set_sort_by_value_then_relevance(TS, $desc);
 	}
+
+	# `mairix -t / --threads' or JMAP collapseThreads
+	if ($opts->{thread} && has_threadid($self)) {
+		$enquire->set_collapse_key(THREADID);
+	}
+
 	my $offset = $opts->{offset} || 0;
 	my $limit = $opts->{limit} || 50;
 	my $mset = $enquire->get_mset($offset, $limit);
@@ -352,15 +378,18 @@ sub qparse_new ($) {
 	$qp->set_database($xdb);
 	$qp->set_stemmer(stemmer($self));
 	$qp->set_stemming_strategy(STEM_SOME());
-	$qp->set_max_wildcard_expansion(100);
-	my $nvrp = $X{NumberValueRangeProcessor};
-	$qp->add_valuerangeprocessor($nvrp->new(YYYYMMDD, 'd:'));
-	$qp->add_valuerangeprocessor($nvrp->new(DT, 'dt:'));
+	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+
+	$cb->($qp, $NVRP->new(YYYYMMDD, 'd:'));
+	$cb->($qp, $NVRP->new(DT, 'dt:'));
 
 	# for IMAP, undocumented for WWW and may be split off go away
-	$qp->add_valuerangeprocessor($nvrp->new(BYTES, 'bytes:'));
-	$qp->add_valuerangeprocessor($nvrp->new(TS, 'ts:'));
-	$qp->add_valuerangeprocessor($nvrp->new(UID, 'uid:'));
+	$cb->($qp, $NVRP->new(BYTES, 'bytes:'));
+	$cb->($qp, $NVRP->new(TS, 'ts:'));
+	$cb->($qp, $NVRP->new(UID, 'uid:'));
 
 	while (my ($name, $prefix) = each %bool_pfx_external) {
 		$qp->add_boolean_prefix($name, $_) foreach split(/ /, $prefix);