#!/usr/bin/perl

use warnings;
use strict;
use LWP::Simple;
use XML::Simple;
use Data::Dumper;
use Text::Table;


##### CONFIG

my @monks = qw{ };  #Add your monks here

##### END CONFIG

my $table = Text::Table->new("#Latitude", "Longitude", "Monk Name");
foreach my $monk (@monks) {
        my $node_xml = get("http://www.perlmonks.org/index.pl?type=use
+r&displaytype=xml&node=".$monk);
        unless($node_xml) {
                warn "Failed to get contents of node $monk: $!\n";
                next;
        }

        my $content = eval {XMLin($node_xml)};
        if($@) {
                warn "parsing ",$monk,"'s homenode failed: $@\n";
                next;
        }
        my $monk_location = extract_location_tag($content->{data}{fiel
+d}{doctext}{content});

        if($monk_location) {
                my $long = sprintf("%02.2f", $monk_location->{"long"})
+;
                my $lat  = sprintf("%02.2f", $monk_location->{"lat"});
                $table->load([$lat, $long, '"'.$monk.'"']);
        } else {
                warn "$monk has no location tag, or parsing failed\n";
        }
}
print $table;


#Yuck. Here be beasties.

sub extract_location_tag {
        my $input = shift;
        my $results = {};
        foreach my $line (split "\n", $input) {                 # Spli
+t HTML on newlines? Bad Idea.
                next unless($line =~ /<!--/i);
                next unless($line =~ /location\s*:/i);
                $line =~ s/-->//g;
                $results->{long} = $1 if($line =~ /longitude\s*=\s*([-
+0-9.]+)/i);
                $results->{lat}  = $1 if($line =~ /latitude\s*=\s*([-0
+-9.]+)/i);
        }
        return undef unless($results->{long} and $results->{lat});
        $results->{long} = parse_location_coord($results->{long}, "lon
+g");
        $results->{lat}  = parse_location_coord($results->{lat}, "lat"
+);
        return $results;
}

sub parse_location_coord {
        my $coord = shift;
        my $type  = shift;
        my ($deg, $min, $sec) = split '\.', $coord;
        $deg ||= 0;
        $min ||= 0;
        $sec ||= 0;
        if($type eq "long") {
                $deg = ($deg >= -180 ? $deg : -180);           #Long's
+ range is twice that
                $deg = ($deg <= 180  ? $deg : 180);
        } else {
                $deg = ($deg >= -90 ? $deg : -90);             # of la
+t.
                $deg = ($deg <= 90  ? $deg : 90);
        }
        $min = ($min >= 0   ? $min : 0);
        $sec = ($sec >= 0   ? $sec : 0);
        $min = ($min <= 59  ? $min : 59);
        $sec = ($sec <= 59  ? $sec : 59);

        if($deg =~ /^\s*-/) {             #If it starts with a '-', it
+'s /probably/ negative. Not nice.
                $min = -$min;
                $sec = -$sec;
        }

        #decimalize
        return($deg + ($min/60) + ($sec/3600));
}
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