Make sure generated KML is correctly UTF-8 encoded
[dns.git] / bin / mkgeo
1 #!/usr/bin/perl
2
3 use strict;
4 use warnings;
5
6 use IO::File;
7 use Math::Trig qw(deg2rad pip2 great_circle_distance);
8 use XML::Writer;
9 use XML::TreeBuilder;
10 use YAML;
11
12 my $source = shift @ARGV;
13 my $zone = shift @ARGV;
14 my $servers = YAML::LoadFile("src/${source}");
15
16 my %countries = ();
17
18 my $countries = XML::TreeBuilder->new;
19
20 $countries->parsefile("lib/countries.xml");
21
22 foreach my $country ($countries->look_down("_tag" => "country"))
23 {
24     my $code = $country->look_down("_tag" => "countryCode")->as_text;
25     my $name = $country->look_down("_tag" => "countryName")->as_text;
26     my $continent = $country->look_down("_tag" => "continent")->as_text;
27     my $west = $country->look_down("_tag" => "bBoxWest")->as_text;
28     my $north = $country->look_down("_tag" => "bBoxNorth")->as_text;
29     my $east = $country->look_down("_tag" => "bBoxEast")->as_text;
30     my $south = $country->look_down("_tag" => "bBoxSouth")->as_text;
31     my $lat = centre_lat( $south, $north );
32     my $lon = centre_lon( $west, $east );
33     my @servers;
34
35     foreach my $servername (keys %$servers)
36     {
37         my $server = $servers->{$servername};
38         my $match = match_country($server, $code, $continent);
39
40         if ($match eq "preferred" || $match eq "allowed")
41         {
42             my $priority = $match eq "preferred" ? 20 : 10;
43             my $distance = distance($lat, $lon, $server->{lat}, $server->{lon});
44
45 #            print STDERR "$servername is $match for $name with distance $distance\n";
46
47             push @servers, { name => $servername, priority => $priority, distance => $distance };
48         }
49     }
50
51     $countries{$code} = {
52         code => $code, name => $name, continent => $continent,
53         lat => $lat, lon => $lon, servers => \@servers
54     };
55 }
56
57 $countries->delete;
58
59 my $zonefile = IO::File->new("> data/${zone}") || die "$!";
60 my $kmlfile = IO::File->new("> kml/${zone}.kml") || die "$!";
61 my $kmlwriter = XML::Writer->new(OUTPUT => $kmlfile, ENCODING => 'utf-8');
62
63 $kmlwriter->xmlDecl();
64 $kmlwriter->startTag("kml", "xmlns" => "http://www.opengis.net/kml/2.2");
65 $kmlwriter->startTag("Document");
66
67 foreach my $country (values %countries)
68 {
69     my @servers = sort { $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @{$country->{servers}};
70     my $server = $servers->{$servers[0]->{name}};
71
72     $zonefile->print("C\L$country->{code}\E.${zone}:$servers[0]->{name}.${zone}:600\n");
73
74     $kmlwriter->startTag("Placemark");
75     $kmlwriter->dataElement("name", $country->{name});
76     $kmlwriter->startTag("LineString");
77     $kmlwriter->startTag("coordinates");
78     $kmlwriter->characters("$country->{lon},$country->{lat}");
79     $kmlwriter->characters("$server->{lon},$server->{lat}");
80     $kmlwriter->endTag("coordinates");
81     $kmlwriter->endTag("LineString");
82     $kmlwriter->endTag("Placemark");
83 }
84
85 foreach my $server (keys %$servers)
86 {
87     $zonefile->print("Cxx.${zone}:${server}.${zone}:600\n");
88 }
89
90 $kmlwriter->endTag("Document");
91 $kmlwriter->endTag("kml");
92 $kmlwriter->end();
93
94 $kmlfile->close();
95 $zonefile->close();
96
97 exit 0;
98
99 sub centre_lat
100 {
101     my $south = shift;
102     my $north = shift;
103
104     return ( $south + $north ) / 2;
105 }
106
107 sub centre_lon
108 {
109     my $west = shift;
110     my $east = shift;
111     my $lon;
112
113     if ($west < $east)
114     {
115         $lon = ( $west + $east ) / 2;
116     }
117     else
118     {
119         $lon = ( $west + $east + 360 ) / 2;
120     }
121
122     $lon = $lon - 360 if $lon > 180;
123
124     return $lon
125 }
126
127 sub match_country
128 {
129     my $server = shift;
130     my $country = shift;
131     my $continent = shift;
132     my $match;
133
134     if ($server->{preferred} &&
135         $server->{preferred}->{countries} &&
136         grep { $_ eq $country } @{$server->{preferred}->{countries}})
137     {
138         $match = "preferred";
139     }
140     elsif ($server->{preferred} &&
141            $server->{preferred}->{continents} &&
142            grep { $_ eq $continent } @{$server->{preferred}->{continents}})
143     {
144         $match = "preferred";
145     }
146     elsif ($server->{allowed} &&
147            $server->{allowed}->{countries} &&
148            grep { $_ eq $country } @{$server->{allowed}->{countries}})
149     {
150         $match = "allowed";
151     }
152     elsif ($server->{allowed} &&
153            $server->{allowed}->{continents} &&
154            grep { $_ eq $continent } @{$server->{allowed}->{continents}})
155     {
156         $match = "allowed";
157     }
158     elsif ($server->{allowed})
159     {
160         $match = "none";
161     }
162     else
163     {
164         $match = "allowed";
165     }
166
167     return $match;
168 }
169
170 sub distance
171 {
172     my $lat1 = deg2rad(shift);
173     my $lon1 = deg2rad(shift);
174     my $lat2 = deg2rad(shift);
175     my $lon2 = deg2rad(shift);
176
177     return great_circle_distance($lon1, pip2 - $lat1, $lon2, pip2 - $lat2);
178 }