biergarten.js

"use strict";

var makeBiergarten = function (pwd) {
    var API_KEY = '5MJYmI4aFb4akUO-_G5ew8BPHqlfvc2g_GvOq_nlGPaDwmuM0MUKtrNuCHVmQeKGaNzYSJ-tiwP1UupqIBbIdX6u2wIVw7tjxN2T6TJBRjuzo9fCpH2JJ42sMJl-eKeSduWmckdVCMIiOpxfb7isdPaJRFT4Jd1XSZaRRKPPBx-7skFfhH-6mh0in8rTpbb7FY_Lxld6rCUc2i_oQ9iAJkRC7ZNiNMCgtcKQq_bO1Lx4_Ql4ZhF42d9oYvUhdif4tXpCzJ-mA_hVKTvPuHtxhQFVf9HBSotsM1KOUj8fL0ZXSytk543oMUlpXVdPI5TesmVqMqdih9Z79xvbN1BP1GE28DpkyroAy-Sxij6qvOiL0nQfDVf-tEZjMODdHd1OeQmzsd2KBHCZoZV4tbMu2AmKg9dJSb1nFYpP2342T9t7wtATZ8XAj5_ooImt4_TzHmbWatWGogjcmbVc2AULfiFMpjnI_rkgNVMOkQfO8gk0By1PLIaKawNCsyfekqFvaesLvX0rKW7a-sjoVpm6QxfueG1nv55Svpd0YQZVAjk'

    var LOGIN_URI = "http://tourism.opendatahub.bz.it/api/LoginApi?api_key=" + API_KEY;
    var BIERGARTEN_URI = "http://tourism.opendatahub.bz.it/api/GastronomyLocalized?api_key" + API_KEY;
    var USER_ID = "tourism@hackthealps.it";
    var PWD = pwd;
    var BEARER_TOKEN = 0;
    var gastro_list = [];

    function get_token(userid, password, callback) {
  //       var payload = {
  //           "username": userid,
  //           "pswd": password
  //       };

		// BEARER_TOKEN = localStorage.getItem("bearerToken");
		// if (BEARER_TOKEN === null)
		// {
		// 	$.ajax(
		// 		LOGIN_URI, {
		// 			method: 'POST',
		// 			data: payload,
		// 			success: function (result) {
		// 				set_bearer_token( result);
		// 				callback();
		// 			}
		// 		});
		// } else {
  //           callback();
  //       }

        callback();;
    }

    function set_bearer_token(token) {
        BEARER_TOKEN = token.access_token;
		localStorage.setItem("bearerToken", BEARER_TOKEN);
    }

    function store_biergarten_list( lat, lon, rad)  {
        return function() {
       /*   Problem Same Origin Policy
                $.ajax(BIERGARTEN_URI+"&pagesize=1024&categorycodefilter=524297&latitude="+ lat + "&longitude=" + lon + "&radius=" + rad, {
                headers: { "Authorization": "Bearer " + BEARER_TOKEN},
                success: consume_list,
            }); */
            $.ajax("bier.json", {
                 success: consume_list,
                 error: function(a,b,c) {
                     alert(a);
                     alert(c);
                 }});
        }
    }

    function consume_list(result, status) {
        alert( result.TotalResults)
        console.log(status);
        for (var i = 0; i < result.TotalResults; i++) {
            var gastro = result.Items[i];
			if (gastro !== undefined)
			{
				console.log(gastro.Latitude, gastro.Longitude, gastro.Shortname)
				gastro_list.push( { lat: gastro.Latitude, lon: gastro.Longitude, sn: gastro.Shortname, visited: false });
			}
		}
    }

	function coordinateDistance(cord1, cord2) {
		// https://www.movable-type.co.uk/scripts/latlong.html
		var R = 6371e3; // metres
		var φ1 = cord1.latitude * Math.PI / 180;
		var φ2 = cord2.latitude* Math.PI / 180;
		var Δφ = (cord2.latitude-cord1.latitude) * Math.PI / 180;
		var Δλ = (cord2.longitude-cord1.longitude) * Math.PI / 180;

		var a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
			Math.cos(φ1) * Math.cos(φ2) *
			Math.sin(Δλ/2) * Math.sin(Δλ/2);
		var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

		var d = R * c;

		return d;
}
	var numberOfPois = 0;
    var my_callback;
	
    var thus = {
        init: function (lat, lon, rad) {
            get_token(USER_ID, PWD, store_biergarten_list( lat, lon, rad))
        },
		
		subscribe: function(callback) {
            my_callback = callback;
        },

        unsubscribe: function(callback) {
            my_callback = undefined;
        },
		
        add_position: function( lat, lon) {
            for (var i = 0; i < gastro_list.length; i++) {
                var d = coordinateDistance( { 'latitude': lat, 'longitude' : lon},
                                    { 'latitude': gastro_list[i].lat, 'longitude' : gastro_list[i].lon })

				if ((d < 100) && (gastro_list[i].visited === false))
				{
					numberOfPois += 1;
					gastro_list[i].visited = true;
					var value = { numberOfPois : numberOfPois, lastPoi : gastro_list[i].sn};
					my_callback(value);
				}				
            }
        }
    };
    return thus;
}