package Win32::Process::List;

use 5.006;
use strict;
use warnings;
use Carp;
use Data::Dumper;

require Exporter;
require DynaLoader;
use AutoLoader;

our @ISA = qw(Exporter DynaLoader);

# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.

# This allows declaration	use Win32::Process::List ':all';
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK
# will save memory.
our %EXPORT_TAGS = ( 'all' => [ qw(
	
) ] );

our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );

our @EXPORT = qw(
	
);
our $VERSION = '0.05';

sub AUTOLOAD {
    # This AUTOLOAD is used to 'autoload' constants from the constant()
    # XS function.  If a constant is not found then control is passed
    # to the AUTOLOAD in AutoLoader.

    my $constname;
    our $AUTOLOAD;
    ($constname = $AUTOLOAD) =~ s/.*:://;
    croak "& not defined" if $constname eq 'constant';
    local $! = 0;
    my $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
	if ($! =~ /Invalid/ || $!{EINVAL}) {
	    $AutoLoader::AUTOLOAD = $AUTOLOAD;
	    goto &AutoLoader::AUTOLOAD;
	}
	else {
	    croak "Your vendor has not defined Win32::Process::List macro $constname";
	}
    }
    {
	no strict 'refs';
	# Fixed between 5.005_53 and 5.005_61
	if ($] >= 5.00561) {
	    *$AUTOLOAD = sub () { $val };
	}
	else {
	    *$AUTOLOAD = sub { $val };
	}
    }
    goto &$AUTOLOAD;
}

bootstrap Win32::Process::List $VERSION;

# Preloaded methods go here.

sub new
{
	my $class = shift;
	my $self = {
		nProcesses=>0,
		processes=>[],
		isError=>0,
		Error=>undef
		};
	bless $self, $class;
	my $error = undef;
	my $err = ListProcesses($error);
	if($error) { 
		$self->{isError} = 1;
		$self->{Error} = $error;
	}
	#my @arr = @{ $err };
	# $self->{processes} = [ @arr ];
	$self->{processes} = [ $err ];
	my %h = %{ $err };
	my $nProcesses = (scalar keys %h);
	$self->{nProcesses} = $nProcesses;
	return $self;
	
}

sub ProcessAlive
{
	my $self = shift;
	my $process=shift;
	my $usePID=0;
	if($process =~ /^\d*$/)	# PID
	{
		$usePID=1;
	}
	if($process !~ /\.exe/)
	{
		$process .= '.exe';
	}
	my $error = undef;
	my $y = undef;
	my $processes=ListProcesses($y, $error);
	#my %h=%{@{$processes}[0]};
	my %h=%{$processes};
	my $pid=$h{$process};
	
	return $pid if $usePID == 0;
}

sub GetNProcesses
{
	my $self = shift;
	return $self->{nProcesses};
}

sub GetProcessPid
{
	my $self = shift;
	my $pr = shift;
	$self->{isError} = 0;
	my @a = @{ $self->{processes} };
	my %h = %{ $a[0] };
	my $count = 0;
	foreach my $key (keys %h)
	{
		if(lc($key) =~ /$pr/) { 
			$a[$count] = $h{$key};
			$count++;
		}
	}
	if($count > 0) {
		return @a;
	}
	$self->{isError} = 1;
	$self->{Error} = "Error: no PID found for $pr";
	return( qw/-3/ );
}

sub GetProcesses
{
	my $self = shift;
	$self->{isError} = 0;
	my @tmp = @{ $self->{processes} };
	my %h = %{ $tmp[0] };
	return %h;
	
}

sub IsError
{
	my $self = shift;
	return $self->{isError};
}

sub GetErrorText
{
	my $self = shift;
	if($self->{isError} == 1)
	{
		return $self->{Error};
	}
	return;
}

DESTROY
{
	my $self = shift;
	#print "destroying!\n";
}

# Autoload methods go after =cut, and are processed by the autosplit program.

1;
__END__
# Below is stub documentation for your module. You better edit it!

=head1 NAME

Win32::Process::List - Perl extension to get all processes and thier PID on a Win32 system

=head1 SYNOPSIS

  use Win32::Process::List;
  my $P = Win32::Process::List->new();	constructor
  my @list = $P->GetProcesses();	returns an array of hashes
  my %h = %{ $list[0] };	get the hash with processname and pid
  foreach my $pr ( keys %h ) {
  	print "Process $pr has PID " .  $h{$pr} . "\n";
  }
  my $PID = $P->GetProcessPid("explorer"); get the PID of process explorer.exe
  my $np = $P->GetNProcesses();  returns the number of processes

=head1 DESCRIPTION

  Win32::Process::List is a module to get the running processes with their PID's from
  a Win32 System. Please look at Win32/Process/List/processes.pl.

=head2 EXPORT

None by default.


=head1 AUTHOR

Reinhard Pagitsch, E<lt>rpirpag@gmx.atE<gt>

=head1 SEE ALSO

L<perl>.

=cut