chore: check on presence of mongo connection string

src/main/kotlin/infrastructure/database/DatabaseManager.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2023. Smart Operating Block
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+package infrastructure.database
+
+import application.controller.manager.RoomDatabaseManager
+import entity.zone.Room
+import entity.zone.RoomID
+import java.util.Date
+
+/**
+ * Implementation of the room database manager.
+ */
+class DatabaseManager : RoomDatabaseManager {
+    init {
+        checkNotNull(System.getenv(mongodbConnectionStringVariable)) { "mongodb connection string required" }
+    }
+
+//    private val database = KMongo
+//        .createClient(System.getenv(mongodbConnectionStringVariable))
+//        .getDatabase(databaseName)
+
+    override fun saveRoom(room: Room): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun deleteRoom(roomId: RoomID): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun findBy(roomId: RoomID, dateTime: Date): Room? {
+        TODO("Not yet implemented")
+    }
+
+    override fun getAllRooms(): Set<Room> {
+        TODO("Not yet implemented")
+    }
+
+    companion object {
+        private const val mongodbConnectionStringVariable = "MONGODB_CONNECTION_STRING"
+//        private const val databaseName = "building_management"
+//        private const val roomCollectionName = "rooms"
+    }
+}