package Win32::NetResource;

require Exporter;
require DynaLoader;
require AutoLoader;

$VERSION = '0.02';

@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.
@EXPORT = qw(
    RESOURCEDISPLAYTYPE_DOMAIN
    RESOURCEDISPLAYTYPE_FILE
    RESOURCEDISPLAYTYPE_GENERIC
    RESOURCEDISPLAYTYPE_GROUP
    RESOURCEDISPLAYTYPE_SERVER
    RESOURCEDISPLAYTYPE_SHARE
    RESOURCEDISPLAYTYPE_TREE
    RESOURCETYPE_ANY
    RESOURCETYPE_DISK
    RESOURCETYPE_PRINT
    RESOURCETYPE_UNKNOWN
    RESOURCEUSAGE_CONNECTABLE
    RESOURCEUSAGE_CONTAINER
    RESOURCEUSAGE_RESERVED
    RESOURCE_CONNECTED
    RESOURCE_GLOBALNET
    RESOURCE_REMEMBERED
);

=head1 NAME

Win32::NetResource - manage network resources in perl

=head1 SYNOPSIS

    use Win32::NetResource;

    $ShareInfo = {
                    'path' => "C:\\MyShareDir",
                    'netname' => "MyShare",
                    'remark' => "It is good to share",
                    'passwd' => "",
                    'current-users' =>0,
                    'permissions' => 0,
                    'maxusers' => -1,
                    'type'  => 0,
                    };
    
    Win32::NetResource::NetShareAdd( $ShareInfo,$parm )
        or die "unable to add share";


=head1 DESCRIPTION

This module offers control over the network resources of Win32.Disks,
printers etc can be shared over a network.

=head1 DATA TYPES

There are two main data types required to control network resources.
In Perl these are represented by hash types.

=over 10

=item %NETRESOURCE

        KEY                    VALUE
        
        'Scope'         =>  Scope of an Enumeration
                            RESOURCE_CONNECTED,
                            RESOURCE_GLOBALNET,
                            RESOURCE_REMEMBERED.
        
        'Type'          =>  The type of resource to Enum
                            RESOURCETYPE_ANY    All resources
                            RESOURCETYPE_DISK    Disk resources
                            RESOURCETYPE_PRINT    Print resources
        
        'DisplayType'   =>  The way the resource should be displayed.
                            RESOURCEDISPLAYTYPE_DOMAIN    
                            The object should be displayed as a domain.
                            RESOURCEDISPLAYTYPE_GENERIC    
                            The method used to display the object does not matter.
                            RESOURCEDISPLAYTYPE_SERVER    
                            The object should be displayed as a server.
                            RESOURCEDISPLAYTYPE_SHARE    
                            The object should be displayed as a sharepoint.
        
        'Usage'         =>  Specifies the Resources usage:
                            RESOURCEUSAGE_CONNECTABLE
                            RESOURCEUSAGE_CONTAINER.
        
        'LocalName'     =>  Name of the local device the resource is 
                            connected to.
        
        'RemoteName'    =>  The network name of the resource.
        
        'Comment'       =>  A string comment.
        
        'Provider'      =>  Name of the provider of the resource.

=back    

=item %SHARE_INFO

This hash represents the SHARE_INFO_502 struct.

=over 10

        KEY                    VALUE
        'netname'        =>    Name of the share.
        'type'           =>    type of share.
        'remark'         =>    A string comment.
        'permissions'    =>    Permissions value
        'maxusers'       =>    the max # of users.
        'current-users'  =>    the current # of users.
        'path'           =>    The path of the share.
        'passwd'         =>    A password if one is req'd

=back

=head1 FUNCTIONS

=head2 NOTE

All of the functions return FALSE (0) if they fail.

=over 10

=item GetSharedResources(\@Resources,dwType)

Creates a list in @Resources of %NETRESOURCE hash references.

=item AddConnection(\%NETRESOURCE,$Password,$UserName,$Connection)

Makes a connection to a network resource specified by %NETRESOURCE

=item CancelConnection($Name,$Connection,$Force)

Cancels a connection to a network resource connected to local device 
$name.$Connection is either 1 - persistent connection or 0, non-persistent.

=item WNetGetLastError($ErrorCode,$Description,$Name)

Gets the Extended Network Error.

=item GetError( $ErrorCode )

Gets the last Error for a Win32::NetResource call.

=item GetUNCName( $UNCName, $LocalPath );

Returns the UNC name of the disk share connected to $LocalPath in $UNCName.

=head2 NOTE

$servername is optional for all the calls below. (if not given the
local machine is assumed.)

=item NetShareAdd(\%SHARE,$parm_err,$servername = NULL )

Add a share for sharing.

=item NetShareCheck($device,$type,$servername = NULL )

Check if a share is available for connection.

=item NetShareDel( $netname, $servername = NULL )

Remove a share from a machines list of shares.

=item NetShareGetInfo( $netname, \%SHARE,$servername=NULL )

Get the %SHARE_INFO information about the share $netname on the
server $servername.

=item NetShareSetInfo( $netname,\%SHARE,$parm_err,$servername=NULL)

Set the information for share $netname.

=item AUTHOR

Jesse Dougherty for Hip Communications.
Gurusamy Sarathy <gsar@umich.edu> had to clean up the horrendous code
and the bugs.

=back

=cut

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($constname);
    ($constname = $AUTOLOAD) =~ s/.*:://;
    #reset $! to zero to reset any current errors.
    $!=0;
    my $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
        if ($! =~ /Invalid/) {
            $AutoLoader::AUTOLOAD = $AUTOLOAD;
            goto &AutoLoader::AUTOLOAD;
        }
        else {
            ($pack,$file,$line) = caller;
            die "Your vendor has not defined Win32::NetResource macro $constname, used at $file line $line.
";
        }
    }
    eval "sub $AUTOLOAD { $val }";
    goto &$AUTOLOAD;
}

sub AddConnection
{
    my $h = $_[0];
    die "AddConnection: HASH reference required" unless ref($h) eq "HASH";

    #
    # The last four items *must* not be deallocated until the
    # _AddConnection() completes (since the packed structure is
    # pointing into these values.
    #
    my $netres = pack( 'i4 p4', $h->{Scope},
    				$h->{Type},
				$h->{DisplayType},
				$h->{Usage},
				$h->{LocalName},
				$h->{RemoteName},
				$h->{Comment},
				$h->{Provider});
    _AddConnection($netres,$_[1],$_[2],$_[3]);
}

#use Data::Dumper;

sub GetSharedResources
{
    die "GetSharedResources: ARRAY reference required"
	unless ref($_[0]) eq "ARRAY";

    my $aref = [];

    # Get the shared resources.

    my $ret = _GetSharedResources( $aref ,$_[1] );
    
    # build the array of hashes in $_[0]
#   print Dumper($aref);    
    foreach ( @$aref ) {
	my %hash;
	@hash{'Scope',
              'Type',
	      'DisplayType',
	      'Usage',
	      'LocalName',
	      'RemoteName',
	      'Comment',
	      'Provider'} = split /\001/, $_;
        push @{$_[0]}, \%hash;
    }

    $ret;
}

sub NetShareAdd
{
    my $shareinfo = _hash2SHARE( $_[0] );
    _NetShareAdd($shareinfo,$_[1], $_[2] || "");
}

sub NetShareGetInfo
{
    my ($netinfo,$val);
    $val = _NetShareGetInfo( $_[0],$netinfo,$_[2] || "");
    $_[1] = _SHARE2hash( $netinfo );    
    $val;
}

sub NetShareSetInfo
{
    my $shareinfo = _hash2SHARE( $_[1] );
    _NetShareSetInfo( $_[0],$shareinfo,$_[2],$_[3] || "");
}


# These are private functions to work with the ShareInfo structure.
# please note that the implementation of these calls requires the
# SHARE_INFO_502 level of information.

sub _SHARE2hash
{
    my %hash = ();
    @hash{'type',
          'permissions',
          'maxusers',
          'current-users',
          'remark',
          'netname',
          'path',
          'passwd'} = unpack('i4 A257 A81 A257 A257',$_[0]);

    return \%hash;
}

sub _hash2SHARE
{
    my $h = $_[0];
    die "Argument must be a HASH reference" unless ref($h) eq "HASH";

    return pack 'i4 a257 a81 a257 a257',
		 @$h{'type',
		    'permissions',
		    'maxusers',
		    'current-users',
		    'remark',
		    'netname',
		    'path',
		    'passwd'};
}


bootstrap Win32::NetResource;

1;
__END__
