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lib/Aion/Query.pm  view on Meta::CPAN

use Exporter qw/import/;
our @EXPORT = our @EXPORT_OK = grep {
	ref \$Aion::Query::{$_} eq "GLOB"
		&& *{$Aion::Query::{$_}}{CODE} && !/^(_|(NaN|import)\z)/n
} keys %Aion::Query::;

use config {
	DSN  => undef,
    DRV  => 'mysql',
    BASE => 'BASE',
    HOST => undef,
    PORT => undef,
    SOCK => undef,
    USER => 'root',
    PASS => 123,
    CONN => undef,
    DEBUG => 0,
	MAX_QUERY_ERROR => 1000,
	BQ => 1,
};

# Формирует DSN на основе конфига
our $DEFAULT_DSN;
sub default_dsn() {
	$DEFAULT_DSN //= do {
		if(defined DSN) {DSN}
		elsif(DRV =~ /mysql|mariadb/i) {
			my $sock = SOCK;
			$sock //= "/var/run/mysqld/mysqld.sock" if !defined HOST;

			"DBI:${\ DRV}:database=${\ BASE};${\
				(defined(HOST)?
					'host=' . HOST
					. (defined(PORT)? ':' . PORT: ())
					. ';': ()
				)
			}${\ (defined($sock)? 'mysql_socket=' . $sock: ()) }"
		}
		elsif(DRV =~ /sqlite/i) { "DBI:${\ DRV}:dbname=${\ BASE}" }
		else { die "Using DSN! DRV: ${\ DRV} is'nt supported." }
	}
}

my $CONN;
sub default_connect_options() {
    return default_dsn, USER, PASS, $CONN //= CONN // do {
		if(DRV =~ /mysql|mariadb/i) {[
			"SET NAMES utf8",
			"SET sql_mode='NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'",
   		]}
		else {[]}
	};
}

# Коннект к базе и id коннекта
sub base_connect {
	my ($dsn, $user, $password, $conn) = @_;
	my $base = DBI->connect($dsn, $user, $password, {
		RaiseError => 1,
		PrintError => 0,
		$dsn =~ /^DBI:mysql/i ? (mysql_enable_utf8 => 1): (),
	}) or die "Connect to db failed";

	$base->do($_) for @$conn;
	return $base unless wantarray;
	my ($base_connection_id) = $dsn =~ /^DBI:(mysql|mariadb)/i
		? $base->selectrow_array("SELECT connection_id()")
		: -1;
	return $base, $base_connection_id;
}

# Проверка коннекта и переконнект
sub connect_respavn {
	my ($base) = @_;
	$base->disconnect, undef $base if $base and !$base->ping;
	($_[0], $_[1]) = base_connect(default_connect_options) if !$base;
	return;
}

# Рестарт коннекта
sub connect_restart {
	my ($base, $base_connection_id) = @_;
	$base->disconnect if $base;
	($_[0], $_[1]) = base_connect(default_connect_options());
	return;
}


# Инициализация БД
our $base; our $base_connection_id;

END {
	$base->disconnect if $base;
}

# возможно выполняется запрос - нужно его убить
sub query_stop {
	return if $base_connection_id == -1;
	# вспомогательное подключение
	my $signal = base_connect(default_connect_options());
	$signal->do("KILL HARD " . ($base_connection_id + 0));
	$signal->disconnect;
	return;
}

# Запросы к базе

our @DEBUG;
sub sql_debug(@) {
	my ($fn, $query) = @_;
	my $msg = "$fn: " . (ref $query? np($query): $query);
	push @DEBUG, $msg;
	print STDERR $msg, "\n" if DEBUG;
}

# sub debug_html {
# 	join "", map { ("<p class='debug'>", to_html($_), "</p>\n") } @DEBUG;
# }

# sub debug_text {
# 	return "" if !@DEBUG;