git.gag.com Git - fw/altos/blob - map-server/altos-mapd/AltosMapd.java

   1 /*
   2  * Copyright © 2018 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 package altosmapd;
  16
  17 import java.net.*;
  18 import java.io.*;
  19 import java.text.*;
  20 import java.util.*;
  21 import java.util.concurrent.*;
  22
  23 import org.altusmetrum.altoslib_13.*;
  24
  25 public class AltosMapd implements AltosLaunchSiteListener {
  26
  27         public static int port = 16717;
  28
  29         public final static int maptype = AltosMap.maptype_hybrid;
  30
  31         public final static int px_size = 512;
  32
  33         public final static int scale = 1;
  34
  35         public static double valid_radius = 17000;      /* 17km */
  36
  37         public String map_dir = null;
  38         public String launch_sites_file = null;
  39         public String key_file = null;
  40
  41         public void usage() {
  42                 System.out.printf("usage: altos-mapd [--mapdir <map-directory] [--launch-sites <launch-sites-file>]\n" +
  43                                   "                  [--radius <valid-radius-m> [--port <port>] [--key <key-file>]\n");
  44                 System.exit(1);
  45         }
  46
  47         private static Semaphore launch_sites_ready;
  48
  49         private static List<AltosLaunchSite> launch_sites;
  50
  51         public void notify_launch_sites(List<AltosLaunchSite> sites) {
  52                 synchronized (launch_sites_ready) {
  53                         if (sites != null) {
  54                                 launch_sites = sites;
  55                                 launch_sites_ready.release();
  56                         }
  57                 }
  58         }
  59
  60         private static boolean west_of(double a, double b) {
  61                 double  diff = b - a;
  62
  63                 while (diff >= 360.0)
  64                         diff -= 360.0;
  65                 while (diff <= -360.0)
  66                         diff += 360.0;
  67
  68                 return diff >= 0;
  69         }
  70
  71         public static boolean check_lat_lon(double lat, double lon, int zoom) {
  72                 AltosMapTransform       transform = new AltosMapTransform(px_size, px_size, zoom, new AltosLatLon(lat, lon));
  73
  74                 AltosLatLon             upper_left = transform.screen_lat_lon(new AltosPointInt(0, 0));
  75                 AltosLatLon             lower_right = transform.screen_lat_lon(new AltosPointInt(px_size, px_size));
  76
  77                 synchronized (launch_sites_ready) {
  78                         if (launch_sites == null) {
  79                                 try {
  80                                         launch_sites_ready.acquire();
  81                                 } catch (InterruptedException ie) {
  82                                         return false;
  83                                 }
  84                         }
  85                 }
  86                 if (launch_sites == null) {
  87                         System.out.printf("No launch site data available, refusing all requests\n");
  88                         return false;
  89                 }
  90
  91                 for (AltosLaunchSite site : launch_sites) {
  92
  93                         /* Figure out which point in the tile to
  94                          * measure to the site That's one of the edges
  95                          * or the site location depend on where the
  96                          * site is in relation to the tile
  97                          */
  98
  99                         double          check_lon;
 100
 101                         if (west_of(site.longitude, upper_left.lon))
 102                                 check_lon = upper_left.lon;
 103                         else if (west_of(lower_right.lon, site.longitude))
 104                                 check_lon = lower_right.lon;
 105                         else
 106                                 check_lon = site.longitude;
 107
 108                         double          check_lat;
 109
 110                         if (site.latitude < lower_right.lat)
 111                                 check_lat = lower_right.lat;
 112                         else if (upper_left.lat < site.latitude)
 113                                 check_lat = upper_left.lat;
 114                         else
 115                                 check_lat = site.latitude;
 116
 117                         AltosGreatCircle gc = new AltosGreatCircle(site.latitude, site.longitude,
 118                                                                    check_lat, check_lon);
 119
 120                         if (gc.distance <= valid_radius)
 121                                 return true;
 122                 }
 123
 124                 return false;
 125         }
 126
 127         AltosMapdServer server;
 128
 129         public void process(String[] args) {
 130
 131                 AltosPreferences.init(new AltosMapdPreferences());
 132
 133                 int skip = 1;
 134                 for (int i = 0; i < args.length; i += skip) {
 135                         skip = 1;
 136                         if (args[i].equals("--mapdir") && i < args.length-1) {
 137                                 map_dir = args[i+1];
 138                                 skip = 2;
 139                         } else if (args[i].equals("--launch-sites") && i < args.length-1) {
 140                                 launch_sites_file = args[i+1];
 141                                 skip = 2;
 142                         } else if (args[i].equals("--radius") && i < args.length-1) {
 143                                 try {
 144                                         valid_radius = AltosParse.parse_double_locale(args[i+1]);
 145                                 } catch (ParseException pe) {
 146                                         usage();
 147                                 }
 148                                 skip = 2;
 149                         } else if (args[i].equals("--port") && i < args.length-1) {
 150                                 try {
 151                                         port = AltosParse.parse_int(args[i+1]);
 152                                 } catch (ParseException pe) {
 153                                         usage();
 154                                 }
 155                                 skip = 2;
 156                         } else if (args[i].equals("--key") && i < args.length-1) {
 157                                 key_file = args[i+1];
 158                                 skip = 2;
 159                         } else {
 160                                 usage();
 161                         }
 162                 }
 163
 164                 if (map_dir == null)
 165                         usage();
 166
 167                 if (key_file != null) {
 168                         try {
 169                                 BufferedReader key_reader = new BufferedReader(new FileReader(key_file));
 170
 171                                 String line = key_reader.readLine();
 172                                 if (line == null || line.length() != 39) {
 173                                         System.out.printf("%s: invalid contents %d \"%s\"\n",
 174                                                           key_file, line.length(), line);
 175                                         usage();
 176                                 }
 177                                 key_reader.close();
 178                                 AltosMapStore.google_maps_api_key = line;
 179                         } catch (Exception e) {
 180                                 System.out.printf("%s: %s\n", key_file, e.toString());
 181                                 usage();
 182                         }
 183                 }
 184
 185                 AltosPreferences.mapdir = new File(map_dir);
 186
 187                 if (launch_sites_file != null)
 188                         AltosLaunchSites.launch_sites_url = "file://" + launch_sites_file;
 189
 190                 launch_sites_ready = new Semaphore(0);
 191
 192                 new AltosLaunchSites(this);
 193
 194                 try {
 195                         server = new AltosMapdServer(port);
 196                 } catch (IOException ie) {
 197                         System.out.printf("Cannot bind to port %d: %s\n", port, ie.toString());
 198                         usage();
 199                 }
 200
 201                 for (;;) {
 202                         try {
 203                                 Socket client = server.accept();
 204                                 if (client == null) {
 205                                         System.out.printf("accept failed\n");
 206                                         continue;
 207                                 }
 208                                 new AltosMapdClient(client);
 209                         } catch (Exception e) {
 210                                 System.out.printf("Exception %s\n", e.toString());
 211                         }
 212                 }
 213         }
 214
 215         public void AltosMapd() {
 216         }
 217
 218         public static void main(final String[] args) {
 219                 new AltosMapd().process(args);
 220         }
 221 }