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/*
* Copyright © 2018 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
package altosmapd;
import java.net.*;
import java.io.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import org.altusmetrum.altoslib_13.*;
public class AltosMapd implements AltosLaunchSiteListener {
public static int port = 16717;
public final static int maptype = AltosMap.maptype_hybrid;
public final static int px_size = 512;
public final static int scale = 1;
public static int max_zoom = 17;
public static double valid_radius = 17000; /* 17km */
public String map_dir = null;
public String launch_sites_file = null;
public String key_file = null;
public void usage() {
System.out.printf("usage: altos-mapd [--mapdir <map-directory] [--launch-sites <launch-sites-file>]\n" +
" [--radius <valid-radius-m> [--port <port>] [--key <key-file>]\n" +
" [--max-zoom <max-zoom-level>\n");
System.exit(1);
}
private static Semaphore launch_sites_ready;
private static List<AltosLaunchSite> launch_sites;
public void notify_launch_sites(List<AltosLaunchSite> sites) {
synchronized (launch_sites_ready) {
if (sites != null) {
launch_sites = sites;
launch_sites_ready.release();
}
}
}
private static boolean west_of(double a, double b) {
double diff = b - a;
while (diff >= 360.0)
diff -= 360.0;
while (diff <= -360.0)
diff += 360.0;
return diff >= 0;
}
public static boolean check_lat_lon(double lat, double lon, int zoom) {
if (zoom > max_zoom)
return false;
AltosMapTransform transform = new AltosMapTransform(px_size, px_size, zoom, new AltosLatLon(lat, lon));
AltosLatLon upper_left = transform.screen_lat_lon(new AltosPointInt(0, 0));
AltosLatLon lower_right = transform.screen_lat_lon(new AltosPointInt(px_size, px_size));
synchronized (launch_sites_ready) {
if (launch_sites == null) {
try {
launch_sites_ready.acquire();
} catch (InterruptedException ie) {
return false;
}
}
}
if (launch_sites == null) {
System.out.printf("No launch site data available, refusing all requests\n");
return false;
}
for (AltosLaunchSite site : launch_sites) {
/* Figure out which point in the tile to
* measure to the site That's one of the edges
* or the site location depend on where the
* site is in relation to the tile
*/
double check_lon;
if (west_of(site.longitude, upper_left.lon))
check_lon = upper_left.lon;
else if (west_of(lower_right.lon, site.longitude))
check_lon = lower_right.lon;
else
check_lon = site.longitude;
double check_lat;
if (site.latitude < lower_right.lat)
check_lat = lower_right.lat;
else if (upper_left.lat < site.latitude)
check_lat = upper_left.lat;
else
check_lat = site.latitude;
AltosGreatCircle gc = new AltosGreatCircle(site.latitude, site.longitude,
check_lat, check_lon);
if (gc.distance <= valid_radius)
return true;
}
return false;
}
AltosMapdServer server;
public void process(String[] args) {
AltosPreferences.init(new AltosMapdPreferences());
int skip = 1;
for (int i = 0; i < args.length; i += skip) {
skip = 1;
if (args[i].equals("--mapdir") && i < args.length-1) {
map_dir = args[i+1];
skip = 2;
} else if (args[i].equals("--launch-sites") && i < args.length-1) {
launch_sites_file = args[i+1];
skip = 2;
} else if (args[i].equals("--radius") && i < args.length-1) {
try {
valid_radius = AltosParse.parse_double_locale(args[i+1]);
} catch (ParseException pe) {
usage();
}
skip = 2;
} else if (args[i].equals("--port") && i < args.length-1) {
try {
port = AltosParse.parse_int(args[i+1]);
} catch (ParseException pe) {
usage();
}
skip = 2;
} else if (args[i].equals("--key") && i < args.length-1) {
key_file = args[i+1];
skip = 2;
} else if (args[i].equals("--max-zoom") && i < args.length-1) {
try {
max_zoom = AltosParse.parse_int(args[i+1]);
} catch (ParseException pe) {
usage();
}
skip = 2;
} else {
usage();
}
}
if (map_dir == null)
usage();
if (key_file != null) {
try {
BufferedReader key_reader = new BufferedReader(new FileReader(key_file));
String line = key_reader.readLine();
if (line == null || line.length() != 39) {
System.out.printf("%s: invalid contents %d \"%s\"\n",
key_file, line.length(), line);
usage();
}
key_reader.close();
AltosMapStore.google_maps_api_key = line;
} catch (Exception e) {
System.out.printf("%s: %s\n", key_file, e.toString());
usage();
}
}
AltosPreferences.mapdir = new File(map_dir);
if (launch_sites_file != null)
AltosLaunchSites.launch_sites_url = "file://" + launch_sites_file;
launch_sites_ready = new Semaphore(0);
new AltosLaunchSites(this);
try {
server = new AltosMapdServer(port);
} catch (IOException ie) {
System.out.printf("Cannot bind to port %d: %s\n", port, ie.toString());
usage();
}
for (;;) {
try {
Socket client = server.accept();
if (client == null) {
System.out.printf("accept failed\n");
continue;
}
new AltosMapdClient(client);
} catch (Exception e) {
System.out.printf("Exception %s\n", e.toString());
}
}
}
public void AltosMapd() {
}
public static void main(final String[] args) {
new AltosMapd().process(args);
}
}
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