local vreme preko reverse geo.js

// Vreme local search
(function() {
  function Vreme() {
    this.init(this);    
  }

  Vreme.prototype = {
    init: function(self){
      self.osvezi(self);
      $('#dodaj').bind('click', function() {self.dodajKraj(self)});
    },
    _request: function (query, callback) {
      var url = "http://query.yahooapis.com/v1/public/yql?q="+encodeURIComponent(query)+"&format=json&callback="
      var data = this._getCache(url);
      var self = this;
      if(data){
        callback(data);
      }
      else{
          var xhr = new XMLHttpRequest();
          xhr.onreadystatechange = function () {
            if (this.readyState == 4) {
              if (this.status == 200) {
                var data = JSON.parse(this.responseText);
                self._setCache(url, data);
                callback(data);
              }
            }
          };
          xhr.open("GET", url);
          xhr.send();
      }
    },
    _getCache: function (hash) {
      if (sessionStorage [murmurhash3_32_gc(hash, 1)]) {
        return JSON.parse(sessionStorage [murmurhash3_32_gc(hash, 1)]);
      } else {
        return false;
      }
    },
    _delCache: function (hash, callback) {
      delete sessionStorage[murmurhash3_32_gc(hash, 1)];
    },
    _setCache: function (hash, data) {
      hash = murmurhash3_32_gc(hash, 1);
      sessionStorage [hash] = JSON.stringify(data);
      setTimeout(function () {
        delete sessionStorage [hash];
      }, 1000 *60 *10);
    },
    getVreme: function(callback, self){
      var query = 'select two_day_history_url, metData.domain_altitude, metData.rh, metData.t, metData.tsValid_issued, metData.domain_meteosiId, metData.domain_longTitle, metData.domain_lat, metData.domain_lon from xml where url in (select title from atom where url="http://spreadsheets.google.com/feeds/list/0AvY_vCMQloRXdE5HajQxUGF5ZEZYUjhKNG9EeVl2bFE/od6/public/basic")'
      self._request(query, function (json) {
       self.addKraj(json, self, function() {
         self.lokacije.sort(function(a, b) {
           return a.oddaljenost-b.oddaljenost;
         });
         callback(self);
       });
      });
    },
    addKraj: function(json, self, callback){
      if (json.query.count) {
        if ( Array.isArray(json.query.results.data) ) {
          //več krajev v json
          json.query.results.data.forEach(function(kraj) {
            self.parseKraj(kraj, self);
          });
        }
      };
      callback(self);
    },
    parseKraj: function(kraj, self){
      if (kraj.metData) {
        var x = 69.1 * (kraj.metData.domain_lat - self.lat);
        var y = 69.1 * (kraj.metData.domain_lon - self.lon) * Math.cos(kraj.metData.domain_lat/57.3);
        var oddaljenost = Math.round( Math.sqrt(x * x + y * y)*1.609344*10)/10;

        self.lokacije.push({
          ime: kraj.metData.domain_longTitle.replace(/\s\(.*\)/img,""),
          lat: kraj.metData.domain_lat,
          lon: kraj.metData.domain_lon,
          id: kraj.metData.domain_meteosiId,
          temp: kraj.metData.t,
          pocutje:self.dewPoint( kraj.metData.t, kraj.metData.rh ), 
          visina: kraj.metData.domain_altitude,
          zgodovina: kraj.two_day_history_url,
          posodobljeno: kraj.metData.tsValid_issued,
          oddaljenost: oddaljenost
        });
      };
    },
    dewPoint: function(T, RH){
      var dew_numer = 237.7*(Math.log(RH/100)+((17.27*T)/(T+237.7)));
      var dew_denom = 17.27-Math.log(RH/100)-((17.27*T)/(T+237.7));
      return Math.round( dew_numer/dew_denom *10)/10;
      
    },
    getLocation: function (self, callback) {
      if (sessionStorage["lat"] && sessionStorage["lon"]) {
        self.lat = sessionStorage["lat"];
        self.lon = sessionStorage["lon"];  
        callback(true);
      }else{
        if (navigator.geolocation) {
          navigator.geolocation.getCurrentPosition(function (position) {
            sessionStorage["lat"] = self.lat = position.coords.latitude;
            sessionStorage["lon"] = self.lon = position.coords.longitude;
            callback(true);
          },callback(false))
        }else{
          callback(false);
        }
      }
    },
    posodobi: function(self){
      if(self.lokacije.length){
        var lokacija = self.lokacije[0];
        $("#temperatura").attr("class", "center");
        $("#kraj").attr("title", "Nadmorska višina "+lokacija.visina+"m");
        $("#kraj").text(lokacija.ime);
        $("#temperatura").text(lokacija.temp + " °C");
        document.title = lokacija.ime + " " + lokacija.temp + "°C";
        //http://shrey27.wordpress.com/2010/09/30/facebook-smileys-utf-8-codes/
        if (lokacija.pocutje > 10 && lokacija.pocutje < 22) {
          $("#pocutje").text("☺");
        }else{
          $("#pocutje").text("☹");
        }
        
      }
    },
    osvezi: function(self){
      clearTimeout(self.refresh);
      self.lokacije = [];
      self.getLocation(self, function(gotLocation) {
        if (gotLocation) {
          self.getVreme(function(event) {
            self.refresh = setTimeout(function() {self.osvezi(self)},1000*60*30)
            self.posodobi(self);
          }, self);
        }
      });
    },
    dodajKraj: function(){
      
    }
  }
  //SamoUNIČENJE (tm)
  return new Vreme();
})();