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package App::BorgRestore::DB;
use v5.14;
use strict;
use warnings;
use App::BorgRestore::Helper;
use DBI;
use Function::Parameters;
use Log::Any qw($log);
method new($class: $db_path, $cache_size) {
my $self = {};
bless $self, $class;
if (! -f $db_path) {
my $db = $self->_open_db($db_path, $cache_size);
$self->initialize_db();
} else {
$self->_open_db($db_path, $cache_size);
}
return $self;
}
method _open_db($dbfile, $cache_size) {
$log->debugf("Opening database at %s", $dbfile);
$self->{dbh} = DBI->connect("dbi:SQLite:dbname=$dbfile","","", {RaiseError => 1, Taint => 1});
$self->{dbh}->do("PRAGMA cache_size=-".$cache_size);
$self->{dbh}->do("PRAGMA strict=ON");
}
method initialize_db() {
$log->debug("Creating initial database");
$self->{dbh}->do('create table `files` (`path` text, primary key (`path`)) without rowid;');
$self->{dbh}->do('create table `archives` (`archive_name` text unique);');
}
method get_archive_names() {
my @ret;
my $st = $self->{dbh}->prepare("select `archive_name` from `archives`;");
$st->execute();
while (my $result = $st->fetchrow_hashref) {
push @ret, $result->{archive_name};
}
return \@ret;
}
method get_archive_row_count() {
my $st = $self->{dbh}->prepare("select count(*) count from `files`;");
$st->execute();
my $result = $st->fetchrow_hashref;
return $result->{count};
}
method add_archive_name($archive) {
$archive = App::BorgRestore::Helper::untaint_archive_name($archive);
my $st = $self->{dbh}->prepare('insert into `archives` (`archive_name`) values (?);');
$st->execute($archive);
$self->_add_column_to_table("files", $archive);
}
method _add_column_to_table($table, $column) {
my $st = $self->{dbh}->prepare('alter table `'.$table.'` add column `'._prefix_archive_id($column).'` integer;');
$st->execute();
}
method remove_archive($archive) {
$archive = App::BorgRestore::Helper::untaint_archive_name($archive);
my $archive_id = $self->get_archive_id($archive);
my @keep_archives = grep {$_ ne $archive;} @{$self->get_archive_names()};
$self->{dbh}->do('create table `files_new` (`path` text, primary key (`path`)) without rowid;');
for my $archive (@keep_archives) {
$self->_add_column_to_table("files_new", $archive);
}
my @columns_to_copy = map {'`'._prefix_archive_id($_).'`'} @keep_archives;
@columns_to_copy = ('`path`', @columns_to_copy);
$self->{dbh}->do('insert into `files_new` select '.join(',', @columns_to_copy).' from files');
$self->{dbh}->do('drop table `files`');
$self->{dbh}->do('alter table `files_new` rename to `files`');
my $sql = 'delete from `files` where ';
$sql .= join(' is null and ', grep {$_ ne '`path`' } @columns_to_copy);
$sql .= " is null";
my $st = $self->{dbh}->prepare($sql);
my $rows = $st->execute();
$st = $self->{dbh}->prepare('delete from `archives` where `archive_name` = ?;');
$st->execute($archive);
}
fun _prefix_archive_id($archive) {
$archive = App::BorgRestore::Helper::untaint_archive_name($archive);
return 'timestamp-'.$archive;
}
method get_archive_id($archive) {
return _prefix_archive_id($archive);
}
method get_archives_for_path($path) {
my $st = $self->{dbh}->prepare('select * from `files` where `path` = ?;');
$st->execute(App::BorgRestore::Helper::untaint($path, qr(.*)));
my @ret;
my $result = $st->fetchrow_hashref;
my $archives = $self->get_archive_names();
for my $archive (@$archives) {
my $archive_id = $self->get_archive_id($archive);
my $timestamp = $result->{$archive_id};
push @ret, {
modification_time => $timestamp,
archive => $archive,
};
}
return \@ret;
}
method add_path($archive_id, $path, $time) {
my $st = $self->{dbh}->prepare_cached('insert or ignore into `files` (`path`, `'.$archive_id.'`)
values(?, ?)');
$st->execute($path, $time);
$st = $self->{dbh}->prepare_cached('update files set `'.$archive_id.'` = ? where `path` = ?');
$st->execute($time, $path);
}
method begin_work() {
$self->{dbh}->begin_work();
}
method commit() {
$self->{dbh}->commit();
}
method vacuum() {
$self->{dbh}->do("vacuum");
}
1;
__END__
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