1 # Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # bidirectional Message-ID <-> Article Number mapping for the NNTP
5 # and web interfaces. This is required for implementing stable article
6 # numbers for NNTP and allows prefix lookups for partial Message-IDs
7 # in case URLs get truncated from copy-n-paste errors by users.
9 # This is maintained by ::SearchIdx
10 package PublicInbox::Msgmap;
17 my ($class, $git_dir, $writable) = @_;
18 my $d = "$git_dir/public-inbox";
19 if ($writable && !-d $d && !mkdir $d) {
21 -d $d or die "$d not created: $err";
23 new_file($class, "$d/msgmap.sqlite3", $writable);
27 my ($class, $f, $writable) = @_;
29 my $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
33 ReadOnly => !$writable,
34 sqlite_use_immediate_transaction => 1,
36 $dbh->do('PRAGMA case_sensitive_like = ON');
37 my $self = bless { dbh => $dbh }, $class;
42 $self->created_at(time) unless $self->created_at;
48 # n.b. invoked directly by scripts/xhdr-num2mid
50 my ($self, $key, $value) = @_;
52 my $sql = 'SELECT val FROM meta WHERE key = ? LIMIT 1';
53 my $dbh = $self->{dbh};
55 defined $value or return $dbh->selectrow_array($sql, undef, $key);
57 $prev = $dbh->selectrow_array($sql, undef, $key);
60 $sql = 'UPDATE meta SET val = ? WHERE key = ? LIMIT 1';
61 $dbh->do($sql, undef, $value, $key);
63 $sql = 'INSERT INTO meta (key,val) VALUES (?,?)';
64 $dbh->do($sql, undef, $key, $value);
70 my ($self, $commit) = @_;
71 $self->meta_accessor('last_commit', $commit);
75 my ($self, $second) = @_;
76 $self->meta_accessor('created_at', $second);
80 my ($self, $mid) = @_;
81 my $dbh = $self->{dbh};
82 my $sql = 'INSERT OR IGNORE INTO msgmap (mid) VALUES (?)';
83 my $sth = $self->{mid_insert} ||= $dbh->prepare($sql);
84 $sth->bind_param(1, $mid);
85 return if $sth->execute == 0;
86 $dbh->last_insert_id(undef, undef, 'msgmap', 'num');
90 my ($self, $num) = @_;
91 my $dbh = $self->{dbh};
92 my $sth = $self->{mid_for} ||=
93 $dbh->prepare('SELECT mid FROM msgmap WHERE num = ? LIMIT 1');
94 $sth->bind_param(1, $num);
100 my ($self, $mid) = @_;
101 my $dbh = $self->{dbh};
102 my $sth = $self->{num_for} ||=
103 $dbh->prepare('SELECT num FROM msgmap WHERE mid = ? LIMIT 1');
104 $sth->bind_param(1, $mid);
106 $sth->fetchrow_array;
111 my $dbh = $self->{dbh};
112 my $sth = $self->{num_minmax} ||=
113 $dbh->prepare('SELECT MIN(num),MAX(num) FROM msgmap');
115 $sth->fetchrow_array;
119 my ($self, $pfx, $limit) = @_;
121 die "No prefix given" unless (defined $pfx && $pfx ne '');
122 $pfx =~ s/([%_])/\\$1/g;
126 $limit += 0; # force to integer
129 $self->{dbh}->selectcol_arrayref('SELECT mid FROM msgmap ' .
130 'WHERE mid LIKE ? ESCAPE ? ' .
131 "ORDER BY num DESC LIMIT $limit",
136 my ($self, $mid) = @_;
137 my $dbh = $self->{dbh};
138 my $sth = $dbh->prepare('DELETE FROM msgmap WHERE mid = ?');
139 $sth->bind_param(1, $mid);
144 my ($self, $num) = @_;
145 my $dbh = $self->{dbh};
146 my $sth = $dbh->prepare('DELETE FROM msgmap WHERE num = ?');
147 $sth->bind_param(1, $num);
155 $e = eval { $dbh->selectrow_array('EXPLAIN SELECT * FROM msgmap;') };
156 defined $e or $dbh->do('CREATE TABLE msgmap (' .
157 'num INTEGER PRIMARY KEY AUTOINCREMENT, '.
158 'mid VARCHAR(1000) NOT NULL, ' .
161 $e = eval { $dbh->selectrow_array('EXPLAIN SELECT * FROM meta') };
162 defined $e or $dbh->do('CREATE TABLE meta (' .
163 'key VARCHAR(32) PRIMARY KEY, '.
164 'val VARCHAR(255) NOT NULL)');
169 my ($self, $num, $cb) = @_;
170 my $dbh = $self->{dbh};
171 my $sth = $dbh->prepare('SELECT num FROM msgmap WHERE num > ? '.
172 'ORDER BY num ASC LIMIT 1000');
174 my $ary = $sth->fetchall_arrayref;
175 @$ary = map { $_->[0] } @$ary;
176 my $nr = scalar @$ary;
181 # only used for mapping external serial numbers (e.g. articles from gmane)
182 # see scripts/xhdr-num2mid or PublicInbox::Filter::RubyLang for usage
184 my ($self, $num, $mid) = @_;
185 my $sth = $self->{mid_set} ||= do {
186 $self->{dbh}->prepare(
187 'INSERT OR IGNORE INTO msgmap (num,mid) VALUES (?,?)');
189 $sth->execute($num, $mid);