NVD 1 kolokvium practice 3 oop

var hashCode = function (s) {
  return String(s).split("").reduce(function (a, b) { a = ((a << 5) - a) + b.charCodeAt(0); return a & a }, 0);
}

class Patient {
  constructor(name) {
    this.name = name;
    this.id = hashCode(name);
    this.positive = true;
  }
}
class CovidPositive extends Patient {
  constructor(name, date, gender, age, municipality, symptoms, respiratory_problem,hyperglycaemia) {
    super(name);
    this.gender = gender;
    this.age = age;
    this.date = date;
    this.municipality = municipality;
    this.symptoms = symptoms;
    this.respiratory_problem = respiratory_problem;
    this.hyperglycaemia = hyperglycaemia;
  }

  riskCalc() {
    if (!this.symptoms && this.test && this.diabetes && this.respiratory_problem)
      return "Patient: " + this.id + " " + this.name + " is with high risk";
    if (this.symptoms && this.positive && (this.hyperglycaemia || this.respiratory_problem))
      return "Patient: " + this.id + " " + this.name + " is with average risk";
    if (this.symptoms && this.positive && !this.hyperglycaemia && !this.respiratory_problem)
      return "Patient: " + this.id + " " + this.name + " is with low risk";
    if (!this.symptoms && this.positive && !this.hyperglycaemia && !this.respiratory_problem)
      return "Patient: " + this.id + " " + this.name + " is with low risk (resistant to covid)";
    if (this.symptoms && this.hyperglycaemia && this.respiratory_problem && this.age > 75 || this.age > 50 && this.gender == "male")
      return "Patient: " + this.id + " " + this.name + " is with high risk";
    else return "Patient: " + this.id + " " + this.name + " is with average risk";
  }
  toString() {
    var s = "Patient " + this.id.toString() + " " + this.name.toString() + " is positive/negative";
    return s;
  }
}
class EHospital {
  constructor() {
    this.lista = [];
  }
  add_patient(pacient) {
    this.lista.push(pacient);
  }
  test_patient(pacient) {
    //console.log(pacient.date + " datumot ni treba odnosno denot 15 dena unazad ni trebat");
    var help = pacient.date+"";
    if(help.substring(4,7)=="Dec"){
    pacient.positive = false;
    }
    else pacient.positive=true;
    console.log(pacient.riskCalc());
  } // 23 dekemvri - 9 dekemvri = 14 dena
   // else if(23 - parseInt(pacient.date.substring(8,9) < 14))
    //pacient.positive = false;
  check() {
    for (var i = 0; i < this.lista.length; i++) {
      this.test_patient(this.lista[i]);
    }
  }
  safe_zone(opstina) {
    var negativnicounter = 0;
    var pozitivnicounter = 0;
    for (var i in this.lista) {
        if(this.lista[i].municipality == opstina) {
     if(this.lista[i].positive)
     pozitivnicounter++;
     else negativnicounter++;
    }
    }
    let res = (negativnicounter / (negativnicounter + pozitivnicounter)) * 100;
    console.log("You are in a " + res.toFixed(2) + "% zone.");
  }
  print() {
    for(var i=0;i<this.lista.length;i++){
    var att = this.lista[i];
    console.log("CovidPositive {");
    for(var j in att) {
      if(j == "name" || j == "municipality" || j == "gender") {
        console.log(j + ": " + "'" + att[j] + "',");
        continue;
      }
      if (j==="hyperglycaemia") {
        console.log(j + ": " + att[j] + " }");
      }
      else {
      console.log(j + ": " + att[j] + ",");
      }
    }
  }
  }
}