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 int max_zoom = 17;
  36
  37         public static double valid_radius = 17000;      /* 17km */
  38
  39         public String map_dir = null;
  40         public String launch_sites_file = null;
  41         public String key_file = null;
  42
  43         public void usage() {
  44                 System.out.printf("usage: altos-mapd [--mapdir <map-directory] [--launch-sites <launch-sites-file>]\n" +
  45                                   "                  [--radius <valid-radius-m> [--port <port>] [--key <key-file>]\n" +
  46                                   "                  [--max-zoom <max-zoom-level>\n");
  47                 System.exit(1);
  48         }
  49
  50         private static Semaphore launch_sites_ready;
  51
  52         private static List<AltosLaunchSite> launch_sites;
  53
  54         public void notify_launch_sites(List<AltosLaunchSite> sites) {
  55                 synchronized (launch_sites_ready) {
  56                         if (sites != null) {
  57                                 launch_sites = sites;
  58                                 launch_sites_ready.release();
  59                         }
  60                 }
  61         }
  62
  63         private static boolean west_of(double a, double b) {
  64                 double  diff = b - a;
  65
  66                 while (diff >= 360.0)
  67                         diff -= 360.0;
  68                 while (diff <= -360.0)
  69                         diff += 360.0;
  70
  71                 return diff >= 0;
  72         }
  73
  74         public static boolean check_lat_lon(double lat, double lon, int zoom) {
  75
  76                 if (zoom > max_zoom)
  77                         return false;
  78
  79                 AltosMapTransform       transform = new AltosMapTransform(px_size, px_size, zoom, new AltosLatLon(lat, lon));
  80
  81                 AltosLatLon             upper_left = transform.screen_lat_lon(new AltosPointInt(0, 0));
  82                 AltosLatLon             lower_right = transform.screen_lat_lon(new AltosPointInt(px_size, px_size));
  83
  84                 synchronized (launch_sites_ready) {
  85                         if (launch_sites == null) {
  86                                 try {
  87                                         launch_sites_ready.acquire();
  88                                 } catch (InterruptedException ie) {
  89                                         return false;
  90                                 }
  91                         }
  92                 }
  93                 if (launch_sites == null) {
  94                         System.out.printf("No launch site data available, refusing all requests\n");
  95                         return false;
  96                 }
  97
  98                 for (AltosLaunchSite site : launch_sites) {
  99
 100                         /* Figure out which point in the tile to
 101                          * measure to the site That's one of the edges
 102                          * or the site location depend on where the
 103                          * site is in relation to the tile
 104                          */
 105
 106                         double          check_lon;
 107
 108                         if (west_of(site.longitude, upper_left.lon))
 109                                 check_lon = upper_left.lon;
 110                         else if (west_of(lower_right.lon, site.longitude))
 111                                 check_lon = lower_right.lon;
 112                         else
 113                                 check_lon = site.longitude;
 114
 115                         double          check_lat;
 116
 117                         if (site.latitude < lower_right.lat)
 118                                 check_lat = lower_right.lat;
 119                         else if (upper_left.lat < site.latitude)
 120                                 check_lat = upper_left.lat;
 121                         else
 122                                 check_lat = site.latitude;
 123
 124                         AltosGreatCircle gc = new AltosGreatCircle(site.latitude, site.longitude,
 125                                                                    check_lat, check_lon);
 126
 127                         if (gc.distance <= valid_radius)
 128                                 return true;
 129                 }
 130
 131                 return false;
 132         }
 133
 134         AltosMapdServer server;
 135
 136         public void process(String[] args) {
 137
 138                 AltosPreferences.init(new AltosMapdPreferences());
 139
 140                 int skip = 1;
 141                 for (int i = 0; i < args.length; i += skip) {
 142                         skip = 1;
 143                         if (args[i].equals("--mapdir") && i < args.length-1) {
 144                                 map_dir = args[i+1];
 145                                 skip = 2;
 146                         } else if (args[i].equals("--launch-sites") && i < args.length-1) {
 147                                 launch_sites_file = args[i+1];
 148                                 skip = 2;
 149                         } else if (args[i].equals("--radius") && i < args.length-1) {
 150                                 try {
 151                                         valid_radius = AltosParse.parse_double_locale(args[i+1]);
 152                                 } catch (ParseException pe) {
 153                                         usage();
 154                                 }
 155                                 skip = 2;
 156                         } else if (args[i].equals("--port") && i < args.length-1) {
 157                                 try {
 158                                         port = AltosParse.parse_int(args[i+1]);
 159                                 } catch (ParseException pe) {
 160                                         usage();
 161                                 }
 162                                 skip = 2;
 163                         } else if (args[i].equals("--key") && i < args.length-1) {
 164                                 key_file = args[i+1];
 165                                 skip = 2;
 166                         } else if (args[i].equals("--max-zoom") && i < args.length-1) {
 167                                 try {
 168                                         max_zoom = AltosParse.parse_int(args[i+1]);
 169                                 } catch (ParseException pe) {
 170                                         usage();
 171                                 }
 172                                 skip = 2;
 173                         } else {
 174                                 usage();
 175                         }
 176                 }
 177
 178                 if (map_dir == null)
 179                         usage();
 180
 181                 if (key_file != null) {
 182                         try {
 183                                 BufferedReader key_reader = new BufferedReader(new FileReader(key_file));
 184
 185                                 String line = key_reader.readLine();
 186                                 if (line == null || line.length() != 39) {
 187                                         System.out.printf("%s: invalid contents %d \"%s\"\n",
 188                                                           key_file, line.length(), line);
 189                                         usage();
 190                                 }
 191                                 key_reader.close();
 192                                 AltosMapStore.google_maps_api_key = line;
 193                         } catch (Exception e) {
 194                                 System.out.printf("%s: %s\n", key_file, e.toString());
 195                                 usage();
 196                         }
 197                 }
 198
 199                 AltosPreferences.mapdir = new File(map_dir);
 200
 201                 if (launch_sites_file != null)
 202                         AltosLaunchSites.launch_sites_url = "file://" + launch_sites_file;
 203
 204                 launch_sites_ready = new Semaphore(0);
 205
 206                 new AltosLaunchSites(this);
 207
 208                 try {
 209                         server = new AltosMapdServer(port);
 210                 } catch (IOException ie) {
 211                         System.out.printf("Cannot bind to port %d: %s\n", port, ie.toString());
 212                         usage();
 213                 }
 214
 215                 for (;;) {
 216                         try {
 217                                 Socket client = server.accept();
 218                                 if (client == null) {
 219                                         System.out.printf("accept failed\n");
 220                                         continue;
 221                                 }
 222                                 new AltosMapdClient(client);
 223                         } catch (Exception e) {
 224                                 System.out.printf("Exception %s\n", e.toString());
 225                         }
 226                 }
 227         }
 228
 229         public void AltosMapd() {
 230         }
 231
 232         public static void main(final String[] args) {
 233                 new AltosMapd().process(args);
 234         }
 235 }