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Assets/Scripts/PlacedObjects/House.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class House : PlacedObject
+{
+    [Header("House")]
+    [SerializeField]
+    int space = 4;
+
+    [SerializeField]
+    List<Person> persons = new List<Person>();
+
+    City city;
+
+    public int GetAvaiableSpace() => space - persons.Count;
+
+    public override void OnPlace()
+    {
+        city = GameObject.Find("GameManager").GetComponent<City>();
+        city.AddHouse(this);
+    }
+
+    public bool AddPerson(Person person)
+    {
+        if (!persons.Contains(person) && persons.Count < space)
+        {
+            persons.Add(person);
+            Debug.Log(person.GetFullName() + " now lives in house");
+            return true;
+        }
+        return false;
+    }
+
+    public void RemovePerson(Person person)
+    {
+        if (persons.Contains(person))
+        {
+            persons.Remove(person);
+            Debug.Log(person.GetFullName() + " does not live in house anymore");
+        }
+    }
+}

Assets/Scripts/PlacedObjects/House.cs.meta

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+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
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+  icon: {instanceID: 0}
+  userData: 
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Assets/Scripts/PlacedObjects/Way.cs

@@ -0,0 +1,12 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Way : PlacedObject
+{
+    public override void OnPlace()
+    {
+        Debug.Log("Placed Way");
+    }
+
+}

Assets/Scripts/PlacedObjects/Way.cs.meta

@@ -0,0 +1,11 @@
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