1 # Copyright (C) 2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # for XOVER, OVER in NNTP, and feeds/homepage/threads in PSGI
5 # Unlike Msgmap, this is an _UNSTABLE_ database which can be
6 # tweaked/updated over time and rebuilt.
7 package PublicInbox::Over;
12 use PublicInbox::SearchMsg;
13 use Compress::Zlib qw(uncompress);
17 my $ro = ref($self) eq 'PublicInbox::Over';
18 my $dbh = DBI->connect("dbi:SQLite:dbname=$self->{filename}",'','', {
23 sqlite_use_immediate_transaction => 1,
25 $dbh->{sqlite_unicode} = 1;
31 bless { filename => $f }, $class;
34 sub disconnect { $_[0]->{dbh} = undef }
36 sub connect { $_[0]->{dbh} ||= $_[0]->dbh_new }
40 bless $smsg, 'PublicInbox::SearchMsg';
41 if (defined(my $data = delete $smsg->{ddd})) {
42 $data = uncompress($data);
44 $smsg->load_from_data($data);
50 my ($self, $sql, $opts, @args) = @_;
51 my $dbh = $self->connect;
52 my $lim = (($opts->{limit} || 0) + 0) || 1000;
53 my $off = (($opts->{offset} || 0) + 0) || 0;
55 $sql .= " OFFSET $off" if $off > 0;
56 my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
57 load_from_row($_) for @$msgs;
62 my ($self, $beg, $end) = @_;
63 do_get($self, <<'', {}, $beg, $end);
64 SELECT * FROM over WHERE num >= ? AND num <= ?
70 my ($self, $ts, $prev) = @_;
71 do_get($self, <<'', {}, $ts, $prev);
72 SELECT num,ddd FROM over WHERE ts >= ? AND num > ?
77 sub nothing () { wantarray ? (0, []) : [] };
80 my ($self, $mid, $opts) = @_;
81 my $dbh = $self->connect;
83 my $id = $dbh->selectrow_array(<<'', undef, $mid);
84 SELECT id FROM msgid WHERE mid = ? LIMIT 1
86 defined $id or return nothing;
88 my $num = $dbh->selectrow_array(<<'', undef, $id);
89 SELECT num FROM id2num WHERE id = ? AND num > 0
90 ORDER BY num ASC LIMIT 1
92 defined $num or return nothing;
94 my ($tid, $sid) = $dbh->selectrow_array(<<'', undef, $num);
95 SELECT tid,sid FROM over WHERE num = ? LIMIT 1
97 defined $tid or return nothing; # $sid may be undef
99 my $cond = 'FROM over WHERE (tid = ? OR sid = ?) AND num > 0';
100 my $msgs = do_get($self, <<"", $opts, $tid, $sid);
101 SELECT * $cond ORDER BY ts ASC
103 return $msgs unless wantarray;
105 my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid);
106 SELECT COUNT(num) $cond
112 my ($self, $opts, $after, $before) = @_;
114 if (defined($before)) {
115 if (defined($after)) {
116 $s = 'num > 0 AND ts >= ? AND ts <= ? ORDER BY ts DESC';
117 @v = ($after, $before);
119 $s = 'num > 0 AND ts <= ? ORDER BY ts DESC';
123 if (defined($after)) {
124 $s = 'num > 0 AND ts >= ? ORDER BY ts ASC';
127 $s = 'num > 0 ORDER BY ts DESC';
130 my $msgs = do_get($self, <<"", $opts, @v);
131 SELECT * FROM over WHERE $s
133 return $msgs unless wantarray;
135 my $nr = $self->{dbh}->selectrow_array(<<'');
136 SELECT COUNT(num) FROM over WHERE num > 0
142 my ($self, $num) = @_;
143 my $dbh = $self->connect;
144 my $smsg = $dbh->selectrow_hashref(<<'', undef, $num);
145 SELECT * from OVER where num = ? LIMIT 1
147 return load_from_row($smsg) if $smsg;