# Copyright (C) 2015 all contributors <meta@public-inbox.org>
# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
-# bidirectional Message-ID <-> Article Number mapping
+
+# bidirectional Message-ID <-> Article Number mapping for the NNTP
+# and web interfaces. This is required for implementing stable article
+# numbers for NNTP and allows prefix lookups for partial Message-IDs
+# in case URLs get truncated from copy-n-paste errors by users.
+#
+# This is maintained by ::SearchIdx
package PublicInbox::Msgmap;
use strict;
use warnings;
-use fields qw(dbh mid_insert mid_for num_for num_minmax);
use DBI;
use DBD::SQLite;
my $err = $!;
-d $d or die "$d not created: $err";
}
- my $f = "$d/msgmap.sqlite3";
+ new_file($class, "$d/msgmap.sqlite3", $writable);
+}
+
+sub new_file {
+ my ($class, $f, $writable) = @_;
+
my $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
AutoCommit => 1,
RaiseError => 1,
PrintError => 0,
+ ReadOnly => !$writable,
sqlite_use_immediate_transaction => 1,
});
$dbh->do('PRAGMA case_sensitive_like = ON');
- my $self = fields::new($class);
- $self->{dbh} = $dbh;
+ my $self = bless { dbh => $dbh }, $class;
if ($writable) {
create_tables($dbh);
+ $dbh->begin_work;
$self->created_at(time) unless $self->created_at;
+ $dbh->commit;
}
$self;
}
+# n.b. invoked directly by scripts/xhdr-num2mid
sub meta_accessor {
my ($self, $key, $value) = @_;
- use constant {
- meta_select => 'SELECT val FROM meta WHERE key = ? LIMIT 1',
- meta_update => 'UPDATE meta SET val = ? WHERE key = ? LIMIT 1',
- meta_insert => 'INSERT INTO meta (key,val) VALUES (?,?)',
- };
+ my $sql = 'SELECT val FROM meta WHERE key = ? LIMIT 1';
my $dbh = $self->{dbh};
my $prev;
- defined $value or
- return $dbh->selectrow_array(meta_select, undef, $key);
-
- $dbh->begin_work;
- eval {
- $prev = $dbh->selectrow_array(meta_select, undef, $key);
-
- if (defined $prev) {
- $dbh->do(meta_update, undef, $value, $key);
- } else {
- $dbh->do(meta_insert, undef, $key, $value);
- }
- $dbh->commit;
- };
- my $err = $@;
- return $prev unless $err;
+ defined $value or return $dbh->selectrow_array($sql, undef, $key);
+
+ $prev = $dbh->selectrow_array($sql, undef, $key);
- $dbh->rollback;
- die $err;
+ if (defined $prev) {
+ $sql = 'UPDATE meta SET val = ? WHERE key = ? LIMIT 1';
+ $dbh->do($sql, undef, $value, $key);
+ } else {
+ $sql = 'INSERT INTO meta (key,val) VALUES (?,?)';
+ $dbh->do($sql, undef, $key, $value);
+ }
+ $prev;
}
sub last_commit {
sub mid_insert {
my ($self, $mid) = @_;
my $dbh = $self->{dbh};
- use constant MID_INSERT => 'INSERT INTO msgmap (mid) VALUES (?)';
- my $sth = $self->{mid_insert} ||= $dbh->prepare(MID_INSERT);
+ my $sql = 'INSERT OR IGNORE INTO msgmap (mid) VALUES (?)';
+ my $sth = $self->{mid_insert} ||= $dbh->prepare($sql);
$sth->bind_param(1, $mid);
- $sth->execute;
+ return if $sth->execute == 0;
$dbh->last_insert_id(undef, undef, 'msgmap', 'num');
}
-use constant MID_FOR => 'SELECT mid FROM msgmap WHERE num = ? LIMIT 1';
sub mid_for {
my ($self, $num) = @_;
my $dbh = $self->{dbh};
- my $sth = $self->{mid_for} ||= $dbh->prepare(MID_FOR);
+ my $sth = $self->{mid_for} ||=
+ $dbh->prepare('SELECT mid FROM msgmap WHERE num = ? LIMIT 1');
$sth->bind_param(1, $num);
$sth->execute;
$sth->fetchrow_array;
sub num_for {
my ($self, $mid) = @_;
my $dbh = $self->{dbh};
- use constant NUM_FOR => 'SELECT num FROM msgmap WHERE mid = ? LIMIT 1';
- my $sth = $self->{num_for} ||= $dbh->prepare(NUM_FOR);
+ my $sth = $self->{num_for} ||=
+ $dbh->prepare('SELECT num FROM msgmap WHERE mid = ? LIMIT 1');
$sth->bind_param(1, $mid);
$sth->execute;
$sth->fetchrow_array;
sub minmax {
my ($self) = @_;
my $dbh = $self->{dbh};
- use constant NUM_MINMAX => 'SELECT MIN(num),MAX(num) FROM msgmap';
- my $sth = $self->{num_minmax} ||= $dbh->prepare(NUM_MINMAX);
+ my $sth = $self->{num_minmax} ||=
+ $dbh->prepare('SELECT MIN(num),MAX(num) FROM msgmap');
$sth->execute;
$sth->fetchrow_array;
}
sub mid_delete {
my ($self, $mid) = @_;
my $dbh = $self->{dbh};
- use constant MID_DELETE => 'DELETE FROM msgmap WHERE mid = ?';
- my $sth = $dbh->prepare(MID_DELETE);
+ my $sth = $dbh->prepare('DELETE FROM msgmap WHERE mid = ?');
$sth->bind_param(1, $mid);
$sth->execute;
}
'val VARCHAR(255) NOT NULL)');
}
+# used by NNTP.pm
sub id_batch {
my ($self, $num, $cb) = @_;
my $dbh = $self->{dbh};
$nr;
}
+# only used for mapping external serial numbers (e.g. articles from gmane)
+# see scripts/xhdr-num2mid or PublicInbox::Filter::RubyLang for usage
+sub mid_set {
+ my ($self, $num, $mid) = @_;
+ my $sth = $self->{mid_set} ||= do {
+ $self->{dbh}->prepare(
+ 'INSERT OR IGNORE INTO msgmap (num,mid) VALUES (?,?)');
+ };
+ $sth->execute($num, $mid);
+}
+
1;