tp3 step 2 solution

Author: Lysoun

tp3/src/main/kotlin/fmt/kotlin/fundamentals/Cellar.kt

@@ -0,0 +1,34 @@
+package fmt.kotlin.fundamentals
+
+class Cellar private constructor(
+    ownerName: String,
+    private var wineBarrels: List<WineBarrel>,
+) {
+    constructor(ownerName: String) : this(ownerName, listOf())
+
+    val totalWineCapacityInLiters: Int
+        get() {
+            var totalCapacity = 0
+
+            for (wineBarrel in wineBarrels) {
+                totalCapacity += wineBarrel.capacityInLiters
+            }
+
+            return totalCapacity
+        }
+
+    var cellarName = "Cave de " + ownerName
+        set(ownerName) {
+            field = "Cave de " + ownerName
+        }
+
+    fun addBarrels(wineBarrels: List<WineBarrel>) {
+        this.wineBarrels = this.wineBarrels.plus(wineBarrels)
+    }
+
+    fun age(monthsNumber: Int) {
+        for (wineBarrel in wineBarrels) {
+            wineBarrel.age(monthsNumber)
+        }
+    }
+}

tp3/src/main/kotlin/fmt/kotlin/fundamentals/WineBarrel.kt

@@ -4,6 +4,10 @@ class WineBarrel private constructor(
     val capacityInLiters: Int = 225,
     private var wineAgeInMonths: Int
 ) {
+    fun age(monthsNumber: Int) {
+        wineAgeInMonths += monthsNumber
+    }
+
     constructor(capacityInLiters: Int = 225) : this(capacityInLiters, 0)
 
     constructor(capacityInLiters: Int = 225, wineBarrel: WineBarrel) : this(