#!/usr/bin/perl -w
#
# Make an attempt to "guess" at the latitude and longitude of this machine by 
# checking a few public SOAP services.
#
# 1) Look up the public facing IP address of this machine
# 2) Get the zip code (and a not very good guess latitude and longitude)
# 3) Look up the latitude and longitude for that zipcode
# 4) Replace the default in the code (Cambridge, MA) with the new info
#

use SOAP::Lite;

sub searchandreplace {
    #
    # Several files in the ephem package have the latitude and longitude
    # for Boston, MA hardcoded.  This script changes that data.
    #
    my ($lat,$lon,$tz,$dir,$file) = @_;
    my $filename = substr($dir,length($dir)-1,1) eq "/" ? $dir.$file : $dir."/".$file;
    print STDERR  "cannot find $filename" if ! -f $filename && return 0;
    print STDERR "illegal latitude: $lat" if $lat !~ /^\s*\-?\d+\.\d+\s*$/ && return 0;
    print STDERR "illegal longitude: $lon" if $lon !~ /^\s*\-?\d+\.\d+\s*$/ && return 0;

    rename($filename,$filename . '.bak');
    open(FILENAMEOUT,">$filename");
    open(FILENAMEIN,"<$filename".".bak");
    while (my $line = <FILENAMEIN>) {
	$line =~ s/42.377834/$lat/;
	$line =~ s/-71.106323/$lon/;
	$line =~ s/(timezone\s*=\s*)-5(\.0+)?/${1}${tz}/;
	$line =~ s/(TOFF\s*=\s*)-5(\.0+)?/${1}${tz}/;
	print(FILENAMEOUT $line);
    };
    close FILENAMEOUT;
    close FILENAMEIN;

    # no need to delete, since this is removed after a clean install anyway
    # unlink($filename.".bak");

    1;
};

my $DEBUG = 0;

my @latitude = ();
my @longitude = ();

my $ip = SOAP::Lite                                             
		  -> service('http://www.showmyip.com/soap/server.php?wsdl')
		  -> showmyip();

print STDERR "Found IP = " . $ip->{'IP'}."\n" if $DEBUG;

my $loc = SOAP::Lite                                             
		  -> service('http://www.showmyip.com/soap/lookupserver.php?wsdl')
		  -> showmyip_lookup($ip->{'IP'});

push(@latitude,$loc->{'LATITUDE'});
push(@longitude,$loc->{'LONGITUDE'});
my $timezone = -5.00;
if ($loc->{'TIMEZONE'} =~ /^([-+]?)(\d+):(\d+)$/) {
    # Change timezone from HOURS:MINUTES to Decimal hours
    #
    my ($sign,$hours,$minutes) = ($1,$2,$3);
    $sign = "" if $sign eq "+";
    $hours =~  s/^0+//;
    $minutes /= 60;
    my $num = ($sign.$hours) + $minutes;
    $timezone = sprintf("%4.2f",$num);
};

if ($loc->{'COUNTRY_CODE3'} eq "USA") {
    print STDERR "Found zip code = ".$loc->{'POSTAL_ZIP_CODE'}."\n" if $DEBUG;
	 
    my @q = [$loc->{'CITY'}." ".$loc->{'STATE'},
	     $loc->{'POSTAL_ZIP_CODE'}];
    my $loc2 = SOAP::Lite
				-> service('http://www.ontok.com/geocode/soap?wsdl')
				-> geocode(SOAP::Data->name(key => ""),
							  SOAP::Data->name(q => @q));
	 
    foreach my $idx (0..scalar(@$loc2)-1) {
		  push(@latitude,@{$loc2}[$idx]->{'lat'});
		  push(@longitude,@{$loc2}[$idx]->{'long'});
    };
};

print STDERR join(" ",@latitude)."\n" if $DEBUG;
print STDERR join(" ",@longitude)."\n" if $DEBUG;

#
#
#

my $lat = pop(@latitude);
my $lon = pop(@longitude);

searchandreplace($lat,$lon,$timezone,$ARGV[0],"x10events.sh");
searchandreplace($lat,$lon,$timezone,$ARGV[0],"year.sh");
searchandreplace($lat,$lon,$timezone,$ARGV[0],"ephem.cc");
searchandreplace($lat,$lon,$timezone,$ARGV[0],"today.cc");
searchandreplace($lat,$lon,$timezone,$ARGV[0],"year.cc");
searchandreplace($lat,$lon,$timezone,$ARGV[0],"x10events.cc");