X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FSearchThread.pm;h=be29098073cab4bd1f67884750c5ee273e572336;hb=c204da04aa24e85236f82ba5a7c6c7e19c8a20d3;hp=601a84b0e263428618fafc5d74540a704f4e3bfa;hpb=c6a8fdf71e2c336f6e591c6f4005c8e922c8f2df;p=public-inbox.git

diff --git a/lib/PublicInbox/SearchThread.pm b/lib/PublicInbox/SearchThread.pm
index 601a84b0..be290980 100644
--- a/lib/PublicInbox/SearchThread.pm
+++ b/lib/PublicInbox/SearchThread.pm
@@ -7,7 +7,7 @@
 # Mail::Thread is unmaintained and unavailable on some distros.
 # We also do not want pruning or subject grouping, since we want
 # to encourage strict threading and hopefully encourage people
-# to use proper In-Reply-To.
+# to use proper In-Reply-To/References.
 #
 # This includes fixes from several open bugs for Mail::Thread
 #
@@ -21,32 +21,36 @@ package PublicInbox::SearchThread;
 use strict;
 use warnings;
 
-sub new {
-	return bless {
-		messages => $_[1],
-		id_table => {},
-		rootset  => []
-	}, $_[0];
-}
-
 sub thread {
-	my $self = shift;
-	_add_message($self, $_) foreach @{$self->{messages}};
-	my $id_table = delete $self->{id_table};
-	$self->{rootset} = [ grep {
-		!delete($_->{parent}) && $_->visible } values %$id_table ];
+	my ($msgs, $ordersub, $ibx) = @_;
+	my $id_table = {};
+
+	# Sadly, we sort here anyways since the fill-in-the-blanks References:
+	# can be shakier if somebody used In-Reply-To with multiple, disparate
+	# messages.  So, take the client Date: into account since we can't
+	# alway determine ordering when somebody uses multiple In-Reply-To.
+	# We'll trust the client Date: header here instead of the Received:
+	# time since this is for display (and not retrieval)
+	_add_message($id_table, $_) for sort { $a->{ds} <=> $b->{ds} } @$msgs;
+	my $rootset = [ grep {
+			!delete($_->{parent}) && $_->visible($ibx)
+		} values %$id_table ];
+	$id_table = undef;
+	$rootset = $ordersub->($rootset);
+	$_->order_children($ordersub, $ibx) for @$rootset;
+	$rootset;
 }
 
 sub _get_cont_for_id ($$) {
-	my ($self, $mid) = @_;
-	$self->{id_table}{$mid} ||= PublicInbox::SearchThread::Msg->new($mid);
+	my ($id_table, $mid) = @_;
+	$id_table->{$mid} ||= PublicInbox::SearchThread::Msg->new($mid);
 }
 
 sub _add_message ($$) {
-	my ($self, $smsg) = @_;
+	my ($id_table, $smsg) = @_;
 
 	# A. if id_table...
-	my $this = _get_cont_for_id($self, $smsg->{mid});
+	my $this = _get_cont_for_id($id_table, $smsg->{mid});
 	$this->{smsg} = $smsg;
 
 	# B. For each element in the message's References field:
@@ -59,7 +63,7 @@ sub _add_message ($$) {
 	my $prev;
 	foreach my $ref ($refs =~ m/<([^>]+)>/g) {
 		# Find a Container object for the given Message-ID
-		my $cont = _get_cont_for_id($self, $ref);
+		my $cont = _get_cont_for_id($id_table, $ref);
 
 		# Link the References field's Containers together in
 		# the order implied by the References header
@@ -79,14 +83,9 @@ sub _add_message ($$) {
 
 	# C. Set the parent of this message to be the last element in
 	# References.
-	$prev->add_child($this) if defined $prev;
-}
-
-sub order {
-	my ($self, $ordersub) = @_;
-	my $rootset = $ordersub->($self->{rootset});
-	$self->{rootset} = $rootset;
-	$_->order_children($ordersub) for @$rootset;
+	if (defined $prev && !$this->has_descendent($prev)) { # would loop
+		$prev->add_child($this);
+	}
 }
 
 package PublicInbox::SearchThread::Msg;
@@ -129,7 +128,7 @@ sub add_child {
 
 sub has_descendent {
 	my ($self, $child) = @_;
-	my %seen; # loop prevention XXX may not be necessary
+	my %seen; # loop prevention
 	while ($child) {
 		return 1 if $self == $child || $seen{$child}++;
 		$child = $child->{parent};
@@ -140,20 +139,21 @@ sub has_descendent {
 # Do not show/keep ghosts iff they have no children.  Sometimes
 # a ghost Message-ID is the result of a long header line
 # being folded/mangled by a MUA, and not a missing message.
-sub visible ($) {
-	my ($self) = @_;
-	$self->{smsg} || scalar values %{$self->{children}};
+sub visible ($$) {
+	my ($self, $ibx) = @_;
+	($self->{smsg} ||= eval { $ibx->smsg_by_mid($self->{id}) }) ||
+	 (scalar values %{$self->{children}});
 }
 
 sub order_children {
-	my ($cur, $ordersub) = @_;
+	my ($cur, $ordersub, $ibx) = @_;
 
 	my %seen = ($cur => 1); # self-referential loop prevention
 	my @q = ($cur);
 	while (defined($cur = shift @q)) {
 		my $c = $cur->{children}; # The hashref here...
 
-		$c = [ grep { !$seen{$_}++ && visible($_) } values %$c ];
+		$c = [ grep { !$seen{$_}++ && visible($_, $ibx) } values %$c ];
 		$c = $ordersub->($c) if scalar @$c > 1;
 		$cur->{children} = $c; # ...becomes an arrayref
 		push @q, @$c;