GreatCircle.js

'use strict';

module.exports = function(Agrirouter) {
  Agrirouter.closestRouter = function(fieldid, lat, long, cb) {
  	var response;
    Agrirouter.find({"where":{"fieldid":fieldid}},function (err, ret) {
    	for (var i = 0; i >= ret.length - 1; i++) {
    		var delPhi = ret[i]["lat"] - lat;
			var delLambda = ret[i]["long"] - long;
			var R = 6371000;
			var rad = R * Math.sqrt(delPhi * delPhi + delLambda * delLambda);
    		ret[i]["distance"] = rad;
    	}
    	response = ret.sort(function(a, b) {
		    return parseFloat(a.distance) - parseFloat(b.distance);
		})[0];
    	cb(null, response);
    });
  };
  Agrirouter.remoteMethod(
    'closestRouter', {
      http: {
        path: '/getClosestRouter',
        verb: 'get'
      },
      accepts: [
      	  {
	      	arg: 'fieldid',
	      	type: 'string'
	      },
	      {
	      	arg: 'lat',
	      	type: 'number'
	      },{
	      	arg: 'long',
	      	type: 'number'
	      }
      ],
      returns: {
        arg: 'router',
        type: 'string'
      }
    }
  );
};