jsroute/jsroute

   1 #!/bin/bash
   2 #
   3 # jsroute, a utility to route via Google Maps using Envjs.
   4 #
   5 # We take a starting point and a destination as arguments, and
   6 # pass them off to a Javascript file (route.js) which is compiled
   7 # on-the-fly using Mozilla's Rhino Javascript compiler. Then, magic
   8 # occurs, and the JSON results are output to the command line.
   9 #
  10 # Soon the output will be piped through a Python script to convert
  11 # it to (usable) KML.
  12 #
  13
  14 # Some exit codes.
  15 EXIT_MISSING_START=1
  16 EXIT_MISSING_DESTINATION=2
  17 EXIT_HELP=3
  18 EXIT_GETOPT_UNHAPPY=4
  19 EXIT_TOO_MANY_ARGS=5
  20
  21
  22 # Empty by default.
  23 ROUTENAME=""
  24
  25 # A function which just displays the usage information.
  26 function usage {
  27     echo ""
  28     echo "Usage: $0 [-h] [-n \"name\"] \"<start>\" \"<destination>\""
  29     echo ""
  30     echo "ARGUMENTS"
  31     echo "  <start>,       Your starting location. Use quotes."
  32     echo "  <destination>, Your destination. Use quotes."
  33     echo ""
  34     echo "OPTIONS"
  35     echo "  -h,            Show the usage information and bail."
  36     echo "  -n <name>,     Give the route a meaningful name. Use quotes."
  37     echo ""
  38 }
  39
  40
  41 while getopts "hn:" option; do
  42   case $option in
  43       n ) ROUTENAME="$OPTARG";
  44           # Shift the number of remaining arguments down by two,
  45           # so that the non-option parameters are accessible via
  46           # $1, $2, etc.
  47           shift $((OPTIND-1));;
  48       h ) usage;
  49           exit $EXIT_HELP;;
  50       * ) usage;
  51           exit $EXIT_GETOPT_UNHAPPY;;
  52   esac
  53 done
  54
  55
  56 # The non-option parameters.
  57 START=$1
  58 DESTINATION=$2
  59
  60 # Dollarsign-octothorpe contains the number of parameter arguments.
  61 if [ "$#" -gt 2 ]; then
  62     echo "Error: too many arguments. Maybe you forgot to place the source and destination in quotes?"
  63     usage;
  64     exit $EXIT_TOO_MANY_ARGS
  65 fi
  66
  67 if [ "$START" == "" ]; then
  68     usage;
  69     exit $EXIT_MISSING_START
  70 fi
  71
  72 if [ "$DESTINATION" == "" ]; then
  73     usage;
  74     exit $EXIT_MISSING_DESTINATION
  75 fi
  76
  77 if [ "$ROUTENAME" == "" ]; then
  78     # Set it to a default of "<start> to <destination>".
  79     ROUTENAME="$START to $DESTINATION"
  80 fi
  81
  82 java -jar ../lib/env-js/rhino/js.jar -opt -1 route.js "$1" "$2"