X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FOver.pm;h=b9b02f967b324173fe66caf5e02fbb9df864e892;hb=95bdac7f09c69036efed537a4d03d5bdd2ae4eb6;hp=b2f68835a42738cce7613c6b544e6d93a9b0123d;hpb=c33472811331a6134b796f1889d87f7decf4c831;p=public-inbox.git

diff --git a/lib/PublicInbox/Over.pm b/lib/PublicInbox/Over.pm
index b2f68835..b9b02f96 100644
--- a/lib/PublicInbox/Over.pm
+++ b/lib/PublicInbox/Over.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2018 all contributors <meta@public-inbox.org>
+# Copyright (C) 2018-2020 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # for XOVER, OVER in NNTP, and feeds/homepage/threads in PSGI
@@ -11,19 +11,19 @@ use DBI;
 use DBD::SQLite;
 use PublicInbox::SearchMsg;
 use Compress::Zlib qw(uncompress);
+use constant DEFAULT_LIMIT => 1000;
 
 sub dbh_new {
-	my ($self) = @_;
-	my $ro = ref($self) eq 'PublicInbox::Over';
+	my ($self, $rw) = @_;
 	my $f = $self->{filename};
-	if (!$ro && !-f $f) { # SQLite defaults mode to 0644, we want 0666
+	if ($rw && !-f $f) { # SQLite defaults mode to 0644, we want 0666
 		open my $fh, '+>>', $f or die "failed to open $f: $!";
 	}
 	my $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
 		AutoCommit => 1,
 		RaiseError => 1,
 		PrintError => 0,
-		ReadOnly => $ro,
+		ReadOnly => !$rw,
 		sqlite_use_immediate_transaction => 1,
 	});
 	$dbh->{sqlite_unicode} = 1;
@@ -39,13 +39,16 @@ sub disconnect { $_[0]->{dbh} = undef }
 
 sub connect { $_[0]->{dbh} ||= $_[0]->dbh_new }
 
-sub load_from_row {
-	my ($smsg) = @_;
+sub load_from_row ($;$) {
+	my ($smsg, $cull) = @_;
 	bless $smsg, 'PublicInbox::SearchMsg';
 	if (defined(my $data = delete $smsg->{ddd})) {
 		$data = uncompress($data);
 		utf8::decode($data);
-		$smsg->load_from_data($data);
+		PublicInbox::SearchMsg::load_from_data($smsg, $data);
+
+		# saves over 600K for 1000+ message threads
+		PublicInbox::SearchMsg::psgi_cull($smsg) if $cull;
 	}
 	$smsg
 }
@@ -53,10 +56,11 @@ sub load_from_row {
 sub do_get {
 	my ($self, $sql, $opts, @args) = @_;
 	my $dbh = $self->connect;
-	my $lim = (($opts->{limit} || 0) + 0) || 1000;
+	my $lim = (($opts->{limit} || 0) + 0) || DEFAULT_LIMIT;
 	$sql .= "LIMIT $lim";
 	my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
-	load_from_row($_) for @$msgs;
+	my $cull = $opts->{cull};
+	load_from_row($_, $cull) for @$msgs;
 	$msgs
 }
 
@@ -81,6 +85,7 @@ sub nothing () { wantarray ? (0, []) : [] };
 sub get_thread {
 	my ($self, $mid, $prev) = @_;
 	my $dbh = $self->connect;
+	my $opts = { cull => 1 };
 
 	my $id = $dbh->selectrow_array(<<'', undef, $mid);
 SELECT id FROM msgid WHERE mid = ? LIMIT 1
@@ -97,21 +102,47 @@ ORDER BY num ASC LIMIT 1
 SELECT tid,sid FROM over WHERE num = ? LIMIT 1
 
 	defined $tid or return nothing; # $sid may be undef
+
+	my $cond_all = '(tid = ? OR sid = ?) AND num > ?';
 	my $sort_col = 'ds';
 	$num = 0;
-	if ($prev) {
+	if ($prev) { # mboxrd stream, only
 		$num = $prev->{num} || 0;
 		$sort_col = 'num';
 	}
-	my $cond = '(tid = ? OR sid = ?) AND num > ?';
-	my $msgs = do_get($self, <<"", {}, $tid, $sid, $num);
-SELECT num,ts,ds,ddd FROM over WHERE $cond ORDER BY $sort_col ASC
 
-	return $msgs unless wantarray;
+	my $cols = 'num,ts,ds,ddd';
+	unless (wantarray) {
+		return do_get($self, <<"", $opts, $tid, $sid, $num);
+SELECT $cols FROM over WHERE $cond_all
+ORDER BY $sort_col ASC
 
-	my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid, $num);
-SELECT COUNT(num) FROM over WHERE $cond
+	}
 
+	# HTML view always wants an array and never uses $prev,
+	# but the mbox stream never wants an array and always has $prev
+	die '$prev not supported with wantarray' if $prev;
+	my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid, $num);
+SELECT COUNT(num) FROM over WHERE $cond_all
+
+	# giant thread, prioritize strict (tid) matches and throw
+	# in the loose (sid) matches at the end
+	my $msgs = do_get($self, <<"", $opts, $tid, $num);
+SELECT $cols FROM over WHERE tid = ? AND num > ?
+ORDER BY $sort_col ASC
+
+	# do we have room for loose matches? get the most recent ones, first:
+	my $lim = DEFAULT_LIMIT - scalar(@$msgs);
+	if ($lim > 0) {
+		$opts->{limit} = $lim;
+		my $loose = do_get($self, <<"", $opts, $tid, $sid, $num);
+SELECT $cols FROM over WHERE tid != ? AND sid = ? AND num > ?
+ORDER BY $sort_col DESC
+
+		# TODO separate strict and loose matches here once --reindex
+		# is fixed to preserve `tid' properly
+		push @$msgs, @$loose;
+	}
 	($nr, $msgs);
 }