#
# The contents of this file are subject to the Netscape Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/NPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is mozilla.org code.
#
# The Initial Developer of the Original Code is Netscape
# Communications Corporation.  Portions created by Netscape are
# Copyright (C) 1998-2000 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s): 
#

package mozBDate;

use strict;
use IO::File;

BEGIN {
    use Exporter ();
    use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

    $VERSION = 1.00;
    @ISA = qw(Exporter);
    @EXPORT = qw(&UpdateBuildNumber &SubstituteBuildNumber);
    %EXPORT_TAGS = ( );
    @EXPORT_OK = qw();
}

sub write_number($) {
    my ($file, $num) = @_;
    unlink($file);
    open(OUT, ">$file") || die "$file: $!\n";
    print OUT "$num\n";
    close(OUT);
}

sub UpdateBuildNumber($$) {

    my ($outfile, $official) = @_;
    my $given_date = $ENV{"MOZ_BUILD_DATE"};
    my $build_number;

    if ($given_date eq "") {
	# XP way of doing the build date.
	# 1998091509 = 1998, September, 15th, 9am local time zone
	my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
	    localtime(time);

	# localtime returns year minus 1900
	$year = $year + 1900;
	$build_number = sprintf("%04d%02d%02d%02d", $year, 1+$mon,
				$mday, $hour);
    }
    else {
	$build_number = $given_date;
    }

    if ("$outfile" eq "") {
        print "$build_number\n";
        return;
    }

    if ($official) {
        &write_number($outfile, $build_number);
    } else {

        my $old_num = -1;
        
        # Only overwrite file if contents are not already set to 0
        if ( -e $outfile ) {
            open(OLD, "<$outfile") || die "$outfile: $!\n";
            $old_num = <OLD>;
            chomp($old_num);
            close(OLD);
        }
    
        if ($old_num != 0) {
            &write_number($outfile, "0000000000");
        }
    }
    return;
}

sub SubstituteBuildNumber($$$) {

    my ($outfile, $build_num, $infile) = @_;
    my $INFILE = new IO::File;
    my $OUTFILE = new IO::File;
    
    open $INFILE, "<$build_num";
    my $build = <$INFILE>;
    close $INFILE;
    chomp $build;
    
    if ($infile ne "") {
        open($INFILE, "< $infile") || die "$infile: $!\n";
    } else {
        open($INFILE, "< $outfile") || die "$outfile: $!\n";
    }
    open $OUTFILE, ">${outfile}.old" || die;
    
    while (<$INFILE>) {
    
    my $id = $_;
    my $temp;
    if ($id =~ "Build ID:") {
        $temp = "Build ID: " . $build;
        $id =~ s/Build ID:\s\d+/$temp/;
        print $OUTFILE $id;
    }
    elsif ($id =~ "NS_BUILD_ID") {
        $temp = "NS_BUILD_ID " . $build;
        $id =~ s/NS_BUILD_ID\s\d+/$temp/;
        print $OUTFILE $id;
    }
    else {
        print $OUTFILE $_;
    }
    }

    close $INFILE;
    close $OUTFILE;

    unlink $outfile;
    rename "${outfile}.old", "$outfile";
}

END {};

1;