NVD 1 kolokvium practice 2 oop

class ObjFilters {
  constructor(name) {
    this.name = name;
    this.id = hashCode(name);
    this.filters = false;
}
}
class PollutionObject extends ObjFilters {
  constructor(name, date, municipality, temperature, PM10, NO2, O3, SO2) {
    super(name);
    this.date = date;
    this.temperature = temperature;
    this.municipality = municipality;
    this.PM10 = PM10;
    this.NO2 = NO2;
    this.O3 = O3;
    this.SO2 = SO2;
  }
  rizik() {
    if(this.PM10 && this.NO2 && this.O3 && this.SO2 && this.temperature<10)
    return "The object  "+this.id+" " + this.name + " pollutes the air at high risk";
    if(this.PM10 && this.NO2 & this.O3 && this.SO2 && this.temperature>10)
    return "The object  "+this.id+" " + this.name + " pollutes the air at average risk";
    if(this.NO2 && this.SO2 && this.O3)
    return "The object  "+this.id+" " + this.name + " pollutes the air at average risk";
    if(this.PM10 && this.NO2 && this.O3)
    return "The object  "+this.id+" " + this.name + " pollutes the air at average risk";
    if(this.SO2 && this.O3)
    return "The object  "+this.id+" " + this.name + " pollutes the air at low risk"
    if(this.PM10 && this.NO2 && this.temperature>10)
    return "The object  "+this.id+" " + this.name + " pollutes the air at low risk"
    if(this.PM10 == false && this.NO2 == false && this.SO2 == false && this.O3 == false)
    return "The object  "+this.id+" " + this.name + " pollutes the air at low risk (eco friendly)"
  }
  toString () {
  var ret="Object "+this.id.toString() + " " + this.name.toString();//Object %id %name has/hasn't got  filters
  if(this.filters) ret=ret+"has got filters";
  else ret=ret+"hasn't got filters";
  return ret;
}
}
class AirPollution {
constructor() {
this.listofobj = [];
}
add_object(a) {
this.listofobj.push(a);
}
test_object(a) {
var help = a.date+"";
help = help.substring(4,7);
if(!(help == "Dec" || help == "Nov" || help == "Oct"))
a.filters = true;
}
check() {
for(var i=0; i<this.listofobj.length; i++){
  this.test_object(this.listofobj[i]);
  console.log(this.listofobj[i].rizik());
}
}
safe_zone(opstina){
var count = 0;
var fil = 0;
for(var i=0; i<this.listofobj.length; i++){
if(this.listofobj[i].municipality == opstina)
  count++;
  if(this.listofobj.filters == true)
  fil++;
}
if(fil!=0)
return "You are in a " + 100/fil + "% safe zone";
return "You are in a 100% safe zone";
}print() {
      for (var i=0;i<this.listofobj.length;i++)
      {
          console.log("PollutionObject {");
          var h = this.listofobj[i];
          var count = 0;
          for(var k in h) {
            if (k != "add_object" && k != "toString" && k!="safe_zone" && k!="check" && k!="test_object")
            count++;
          }
          var c = 0;
          for (var j in h)
          {
              if (j != "add_object" && j != "toString" && j!="safe_zone" && j!="check" && j!="test_object"){
                if(j=="name" || j == "municipality") {
                 if(c!=count-1){
                  console.log("  " + j + ": " + "'"+ h[j] + "',");
              }
                  else
                  console.log("  " + j + ": " + "'"+ h[j] + "'");
                }
                else{
               if(c!=this.count-1){
                console.log("  " + j + ": " + h[j]+",");
                }
                else
                console.log("  " + j + ": " + h[j]+",");
              }
          }
          c++;
          }
          console.log("}");
      }
  }
}
var hashCode = function(s){
return  String(s).split("").reduce(function(a,b){a=((a<<5)-a)+b.charCodeAt(0);return a&a},0);
}