Tile cache: Reduce falkenstein (tabaluga) to 43Mb (just large enough for .de) + restr...

[dns.git] / bin / mkgeo

diff --git a/bin/mkgeo b/bin/mkgeo
index a47ea816a0dc39510a87a0ec595160706c41943e..b2c1d4f62b128341be2fab9246fa700c7a9bf153 100755 (executable)
--- a/bin/mkgeo
+++ b/bin/mkgeo
@@ -7,7 +7,6 @@ use IO::File;
 use Math::Trig qw(deg2rad pip2 great_circle_distance);
 use JSON::XS;
 use LWP::UserAgent;
-use XML::Writer;
 use XML::TreeBuilder;
 use YAML;
 
@@ -19,7 +18,8 @@ my $servers = YAML::LoadFile("src/${source}");
 while (my($name,$server) = each %$servers)
 {
     $server->{name} = $name;
-    $server->{bandwidth} = $server->{bandwidth} * 1024 * 1024;
+    $server->{bandwidth_limit} = $server->{bandwidth} * 1024 * 1024;
+    $server->{bandwidth_used} = 0;
 
     if ($ENV{PINGDOM_USERNAME} && $ENV{PINGDOM_PASSWORD})
     {
@@ -107,39 +107,37 @@ foreach my $country ($countries->look_down("_tag" => "country"))
 # Discard the parsed country database
 $countries->delete;
 
-# Loop over the mappings, trying to assign each country to the
-# nearest server, but subject to the bandwidth limits;
-foreach my $mapping (sort {  $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @mappings)
-{
-    my $country = $mapping->{country};
-    my $server = $mapping->{server};
+# Allocate each country to a server
+allocate_servers(\@mappings);
 
-    if ($country->{bandwidth} <= $server->{bandwidth} && !exists($country->{server}))
+# If we failed to allocate every country then loop, increasing
+# the bandwidth for each server by a little and retrying until
+# we manage to allocate everything
+while (grep { !exists($_->{server}) } values %countries)
+{
+    # Clear any existing mappings of countries to servers
+    foreach my $country (values %countries)
     {
-        $country->{server} = $server;
-        $server->{bandwidth} = $server->{bandwidth} - $country->{bandwidth};
+        delete $country->{server};
     }
-}
 
-# Loop over the mappings again, assigning anything that is left
-# as best we can, and allowing bandwidth limits to be exeeded
-foreach my $mapping (sort {  $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @mappings)
-{
-    my $country = $mapping->{country};
-    my $server = $mapping->{server};
+    # Reset bandwidth usage for servers and increase limits by 10%
+    foreach my $server (values %$servers)
+    {
+        $server->{bandwidth_used} = 0;
+        $server->{bandwidth_limit} = $server->{bandwidth_limit} * 1.1;
+    }
 
-    $country->{server} = $server unless exists($country->{server});
+    # Try the allocate again
+    allocate_servers(\@mappings);
 }
 
+# Create JSON collection object
+my @json;
+
 # Open output files
 my $zonefile = IO::File->new("> data/${zone}") || die "$!";
-my $kmlfile = IO::File->new("> kml/${zone}.kml") || die "$!";
-my $kmlwriter = XML::Writer->new(OUTPUT => $kmlfile, ENCODING => 'utf-8');
-
-# Output the KML header
-$kmlwriter->xmlDecl();
-$kmlwriter->startTag("kml", "xmlns" => "http://www.opengis.net/kml/2.2");
-$kmlwriter->startTag("Document");
+my $jsonfile = IO::File->new("> json/${zone}.json") || die "$!";
 
 # Output details for each country
 foreach my $country (values %countries)
@@ -152,21 +150,28 @@ foreach my $country (values %countries)
 
     if ($clon > 0 && $slon < 0 && 360 + $slon - $clon < $clon - $slon)
     {
-        $clon = $clon - 360;
+        $slon = $slon + 360;
     }
     elsif ($slon > 0 && $clon < 0 && 360 + $clon - $slon < $slon - $clon)
     {
-        $slon = $slon - 360;
+        $clon = $clon + 360;
     }
 
+    $zonefile->print("# $country->{name}\n");
     $zonefile->print("C\L$country->{code}\E.${zone}:$server->{name}.${zone}:600\n");
 
-    $kmlwriter->startTag("Placemark");
-    $kmlwriter->dataElement("name", $country->{name});
-    $kmlwriter->startTag("LineString");
-    $kmlwriter->dataElement("coordinates", "$clon,$clat $slon,$slat");
-    $kmlwriter->endTag("LineString");
-    $kmlwriter->endTag("Placemark");
+    push @json, {
+        type => "Feature",
+        geometry => {
+            type => "LineString",
+            coordinates => [ [ $clon, $clat ], [ $slon, $slat ] ]
+        },
+        properties => {
+            country => $country->{name},
+            server => $server->{name},
+            colour => $server->{colour}
+        }
+    };
 }
 
 # Output default records for IPs that can't be mapped to a country
@@ -175,13 +180,11 @@ foreach my $server (grep { $servers->{$_}->{default} } keys %$servers)
     $zonefile->print("Cxx.${zone}:${server}.${zone}:600\n");
 }
 
-# End the KML file
-$kmlwriter->endTag("Document");
-$kmlwriter->endTag("kml");
-$kmlwriter->end();
+# Output the GeoJSON text
+$jsonfile->print(encode_json(\@json));
 
 # Close the output files
-$kmlfile->close();
+$jsonfile->close();
 $zonefile->close();
 
 exit 0;
@@ -290,3 +293,28 @@ sub distance
 
     return great_circle_distance($lon1, pip2 - $lat1, $lon2, pip2 - $lat2);
 }
+
+#
+# Allocate each country to a server
+#
+sub allocate_servers
+{
+    my $mappings = shift;
+
+    # Loop over the mappings, trying to assign each country to the
+    # nearest server, but subject to the bandwidth limits
+    foreach my $mapping (sort {  $b->{priority} <=> $a->{priority} || $a->{distance} <=> $b->{distance} } @$mappings)
+    {
+        my $country = $mapping->{country};
+        my $server = $mapping->{server};
+
+        if (!exists($country->{server}) &&
+            $server->{bandwidth_used} + $country->{bandwidth} <= $server->{bandwidth_limit})
+        {
+            $country->{server} = $server;
+            $server->{bandwidth_used} = $server->{bandwidth_used} + $country->{bandwidth};
+        }
+    }
+
+    return;
+}