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;
54 my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
55 load_from_row($_) for @$msgs;
60 my ($self, $beg, $end) = @_;
61 do_get($self, <<'', {}, $beg, $end);
62 SELECT num,ts,ds,ddd FROM over WHERE num >= ? AND num <= ?
68 my ($self, $ts, $prev) = @_;
69 do_get($self, <<'', {}, $ts, $prev);
70 SELECT num,ddd FROM over WHERE ts >= ? AND num > ?
75 sub nothing () { wantarray ? (0, []) : [] };
78 my ($self, $mid, $prev) = @_;
79 my $dbh = $self->connect;
81 my $id = $dbh->selectrow_array(<<'', undef, $mid);
82 SELECT id FROM msgid WHERE mid = ? LIMIT 1
84 defined $id or return nothing;
86 my $num = $dbh->selectrow_array(<<'', undef, $id);
87 SELECT num FROM id2num WHERE id = ? AND num > 0
88 ORDER BY num ASC LIMIT 1
90 defined $num or return nothing;
92 my ($tid, $sid) = $dbh->selectrow_array(<<'', undef, $num);
93 SELECT tid,sid FROM over WHERE num = ? LIMIT 1
95 defined $tid or return nothing; # $sid may be undef
99 $num = $prev->{num} || 0;
102 my $cond = '(tid = ? OR sid = ?) AND num > ?';
103 my $msgs = do_get($self, <<"", {}, $tid, $sid, $num);
104 SELECT num,ts,ds,ddd FROM over WHERE $cond ORDER BY $sort_col ASC
106 return $msgs unless wantarray;
108 my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid, $num);
109 SELECT COUNT(num) FROM over WHERE $cond
115 my ($self, $opts, $after, $before) = @_;
117 if (defined($before)) {
118 if (defined($after)) {
119 $s = 'num > 0 AND ts >= ? AND ts <= ? ORDER BY ts DESC';
120 @v = ($after, $before);
122 $s = 'num > 0 AND ts <= ? ORDER BY ts DESC';
126 if (defined($after)) {
127 $s = 'num > 0 AND ts >= ? ORDER BY ts ASC';
130 $s = 'num > 0 ORDER BY ts DESC';
133 my $msgs = do_get($self, <<"", $opts, @v);
134 SELECT ts,ds,ddd FROM over WHERE $s
136 return $msgs unless wantarray;
138 my $nr = $self->{dbh}->selectrow_array(<<'');
139 SELECT COUNT(num) FROM over WHERE num > 0
145 my ($self, $num) = @_;
146 my $dbh = $self->connect;
147 my $smsg = $dbh->selectrow_hashref(<<'', undef, $num);
148 SELECT num,ds,ts,ddd FROM over WHERE num = ? LIMIT 1
150 return load_from_row($smsg) if $smsg;
155 my ($self, $mid, $id, $prev) = @_;
156 my $dbh = $self->connect;
158 unless (defined $$id) {
159 my $sth = $dbh->prepare_cached(<<'', undef, 1);
160 SELECT id FROM msgid WHERE mid = ? LIMIT 1
163 $$id = $sth->fetchrow_array;
164 defined $$id or return;
166 my $sth = $dbh->prepare_cached(<<"", undef, 1);
167 SELECT num FROM id2num WHERE id = ? AND num > ?
168 ORDER BY num ASC LIMIT 1
171 $sth->execute($$id, $$prev);
172 my $num = $sth->fetchrow_array or return;
175 $sth = $dbh->prepare_cached(<<"", undef, 1);
176 SELECT num,ts,ds,ddd FROM over WHERE num = ? LIMIT 1
179 my $smsg = $sth->fetchrow_hashref or return;
180 load_from_row($smsg);