Main

src/main/kotlin/interactor/GetCitiesHasHighestDifferentRatingApartment.kt

@@ -0,0 +1,15 @@
+package interactor
+
+import model.CityEntity
+
+class GetCitiesHasHighestDifferentRatingApartment(
+    private val dataSource: CostOfLivingDataSource
+) {
+    fun execute(): CityEntity {
+
+    }
+
+    fun excludeNull(cityEntity: CityEntity): Boolean {
+
+    }
+}

src/main/kotlin/interactor/getCitiesNamesForLowestCostByAverageFruitAndVegetables.kt → src/main/kotlin/interactor/GetCitiesNamesForLowestCostByAverageFruitAndVegetables.kt

@@ -21,15 +21,18 @@ class GetCitiesNamesForLowestCostByAverageFruitAndVegetables(
     }
 
     fun calculateAverageFruitAndVegetables(cityEntity: CityEntity): Float{
-        val kilos = cityEntity.fruitAndVegetablesPrices
-        val sumList = listOf(kilos.apples1kg, kilos.banana1kg,
-                             kilos.oranges1kg, kilos.tomato1kg,
-                             kilos.potato1kg, kilos.onion1kg,
-                            kilos.lettuceOneHead)
-
+        val kilos = cityEntity.fruitAndVegetablesPrices!!
+        val totalFruitAndVegetablesPrices = kilos.run {
+            apples1kg!! + banana1kg!! + oranges1kg!! + tomato1kg!! + potato1kg!! + onion1kg!! + lettuceOneHead!!
+        }
+        return totalFruitAndVegetablesPrices / NUMBER_OF_VARIABLES
     }
 
     fun AverageFruitAndVegetablesVsAverageSalaries(cityEntity: CityEntity): Float {
         return calculateAverageFruitAndVegetables(cityEntity) / cityEntity.averageMonthlyNetSalaryAfterTax!!
     }
+
+    companion object {
+        const val NUMBER_OF_VARIABLES = 7
+    }
 }

src/main/kotlin/interactor/GetFiveCitiesNamesClothesFromFamousBrands.kt

@@ -0,0 +1,26 @@
+package interactor
+
+import model.CityEntity
+import model.ClothesPrices
+
+class GetFiveCitiesNamesClothesFromFamousBrands(
+    private val dataSource: CostOfLivingDataSource
+) {
+
+    fun execute(limit: Int): List<String>{
+        return dataSource
+            .getAllCitiesData()
+            .filter (::excludeNullClothesPrices)
+            .sortedBy (::getFiveCities)
+            .take(limit)
+            .map { it.cityName }
+    }
+
+    fun excludeNullClothesPrices(cityEntity: CityEntity): Boolean{
+        return cityEntity.clothesPrices != null
+    }
+
+    fun getFiveCities(cityEntity: CityEntity): Float {
+        return cityEntity.clothesPrices
+    }
+}