Clean up Transaction Script

transaction-script/src/main/java/com/iluwatar/transactionscript/Hotel.java

@@ -0,0 +1,87 @@
+/*
+ * The MIT License
+ * Copyright © 2014-2019 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package com.iluwatar.transactionscript;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Hotel {
+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
+  private final HotelDaoImpl hotelDao;
+
+  public Hotel(HotelDaoImpl hotelDao) {
+    this.hotelDao = hotelDao;
+  }
+
+  /**
+   * Book a room.
+   *
+   * @param roomNumber room to book
+   * @throws Exception if any error
+   */
+  public void bookRoom(int roomNumber) throws Exception {
+
+    var room = hotelDao.getById(roomNumber);
+
+    if (room.isEmpty()) {
+      throw new Exception("Room number: " + roomNumber + " does not exist");
+    } else {
+      if (room.get().isBooked()) {
+        throw new Exception("Room already booked!");
+      } else {
+        var updateRoomBooking = room.get();
+        updateRoomBooking.setBooked(true);
+        hotelDao.update(updateRoomBooking);
+      }
+    }
+  }
+
+  /**
+   * Cancel a room booking.
+   *
+   * @param roomNumber room to cancel booking
+   * @throws Exception if any error
+   */
+  public void cancelRoomBooking(int roomNumber) throws Exception {
+  
+    var room = hotelDao.getById(roomNumber);
+
+    if (room.isEmpty()) {
+      throw new Exception("Room number: " + roomNumber + " does not exist");
+    } else {
+      if (room.get().isBooked()) {
+        var updateRoomBooking = room.get();
+        updateRoomBooking.setBooked(false);
+        int refundAmount = updateRoomBooking.getPrice();
+        hotelDao.update(updateRoomBooking);
+
+        LOGGER.info("Booking cancelled for room number: " + roomNumber);
+        LOGGER.info(refundAmount + " is refunded");
+      } else {
+        throw new Exception("No booking for the room exists");
+      }
+    }
+  }
+}