#!/usr/bin/perl
#
# Copyright (c) 2006 Zmanda Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
#
# Contact information: Zmanda Inc, 505 N Mathlida Ave, Suite 120
# Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
#
#


use strict;
use warnings;
use File::Spec::Functions;
use lib "/usr/local/lib/mysql-zrm";
use ZRM::Common;


#usage strings
my $USAGE_EXTRACT_BACKUP_STRING=
		"\t\t[--source-directory <directory name>]\n".
		"\t\t[--cleanup]\n";

my @EXTRACTOPT = qw/source-directory=s
                    cleanup/;

sub doUncompressBackup()
{
	if( !$inputs{"source-directory"} ) {
		if( !$lastBackupDir ){
			&printWarning( "Nothing to do\n" );
			return;
		}
		$inputs{"source-directory"}=$lastBackupDir;
	}
	if( !-d $inputs{"source-directory"} ) {
		&printAndDie( "Cannot find source directory ".$inputs{"source-directory"}."\n" );
	}

	my $dir = $inputs{"source-directory"};

	my $fn = catfile( $dir, ".checksum_pending" );
	if( -f $fn ){
		&printAndDie( "Checksum creation in progress. Please run the extract backup after the checksum creation is done\n" );
	}

	my $filename = catfile( $dir, $INDEX_FILENAME );
        my $r = &parseIndexFile( $filename );
	if( $r == 0 ){
		print "ERROR: Looks like backup data for $dir is not available\n";
		return;
	}
	my $f = catfile( $inputs{"source-directory"}, $EXTRACTED_FILENAME );
	if( defined $indexdata{"compress"} || defined $indexdata{"encrypt"} ){
		if( !defined $inputs{cleanup} ){
			$r = &uncompressBackup( $inputs{"source-directory"} );
			if( $r == 0 ){
				&printAndDie( "Unable to uncompress backup\n" );
			}else{
				if( ! open H, ">$f" ){
					&printError( "Unable to open extract file\n" );
				}
				close H;
			}
		}else{
			unlink( $f );
			&removeUncompressedBackup($inputs{"source-directory"}, \%indexdata);
		}

	}else{
		&printLog( "$dir does not contain compressed or encrypted data\n" );
	}
}

#Sets up defaults for backup
sub setupDefaults()
{
        $action = "extract-backup";
        $USAGE_STRING = $USAGE_EXTRACT_BACKUP_STRING.$USAGE_COMMON_OPTIONS_STRING;
}

sub main()
{
	if ($onWindows ) {
        	&printLog( "Extract Backup is not supported in Windows\n" );
        	return;
	}
        &setupDefaults();
        &initCommon(@EXTRACTOPT);
	&createConfigFile();
        &doUncompressBackup();
        &my_exit();
}

&main();


