gistfile1.js

define(["moment"], function(moment) {
  function PrognosisTimeKeeper(prognosisTime) {
    var initialPrognosisTime = function() {
      //this == Window
      var currentTime = moment(this.lastPrognosisTime, "DD.MM.YYYY HH:MM");
      return currentTime.add("h", 4).format("YYYY-MM-DD HH\\0\\0");
    };
    var setNewPrognosisTime = function() {
      this.lastPrognosisTime = prognosisTime.get("lastPrognosisProductionTime");
    };
    var updatePrognosisTime = function() {
      prognosisTime.fetch();
    };

    //this == PrognosisTimeKeeper
    this.lastPrognosisTime = prognosisTime.get("lastPrognosisProductionTime");
    this.selectedPrognosisTime = initialPrognosisTime(); 

    prognosisTime.on("change", setNewPrognosisTime, this);
    setInterval(updatePrognosisTime, 60000);

  };
  return ( PrognosisTimeKeeper );
});