update,

_resources/it114105/itp4510/Assignment/22-23/OrderSystem.java

@@ -0,0 +1,153 @@
+import java.util.Scanner;
+
+public class OrderSystem {
+  private static Scanner sc;
+  private static LinkedList orders;
+  private static int nextGuestID = 9000;
+  private static MenuItem[] menus;
+  private static FoodOrder currentFoodOrder;
+
+  public static void main(String[] args) {
+    sc = new Scanner(System.in);
+    orders = new LinkedList();
+
+    regFoodMenu();
+    while (true) {
+      start();
+    }
+  }
+
+  private static void regFoodMenu() {
+    menus = new MenuItem[4];
+    menus[0] = new MenuItem("Chicken Salad");
+    menus[1] = new MenuItem("Grilled Ribeye Steak");
+    menus[2] = new MenuItem("Angel Hair Pasta with Shrimp");
+    menus[3] = new MenuItem("Grilled Fish and Potatoes");
+  }
+
+  public static void start() {
+
+    try {
+      int memberId = inputMemberId(false);
+
+      if (memberId <= -1) {
+        System.err.println("Have a nice day!!!");
+        System.exit(1);
+      }
+
+      if (memberId == 9999) {
+        adminFunc();
+      } else {
+
+        currentFoodOrder = new FoodOrder(memberId);
+
+        if (memberId == 0) {
+          memberId = nextGuestID++;
+          currentFoodOrder.setMemberID(memberId);
+          currentFoodOrder.setPriority(3);
+        } else if (memberId > 8000 && memberId < 8200)
+          currentFoodOrder.setPriority(1);
+        else if (memberId > 8199 && memberId < 9000)
+          currentFoodOrder.setPriority(2);
+
+        inputOrder();
+      }
+
+    } catch (InvalidInputException e) {
+      System.out.println(e.getMessage());
+    } catch (Exception e) {
+      System.out.println(e.getMessage());
+    }
+
+  }
+
+  public static void printMenu() {
+    System.out.println("----------------- Food Menu ----------------");
+
+    for (int dec = 65, i = 0; i < menus.length; dec++)
+      System.out.println("Set " + (char) dec + " : " + menus[i++]);
+
+    System.out.println("--------------------------------------------");
+  }
+
+  public static void printAdminMenu() {
+    System.out.println("----------------- Admin Function ----------------");
+    System.out.println("1 : Print order list");
+    System.out.println("2 : Remove order");
+  }
+
+  public static int inputMemberId(boolean isAdmin) throws InvalidInputException {
+
+    try {
+      if(isAdmin){
+        System.out.print("Enter Member ID:");
+        int memberId = Integer.parseInt(sc.nextLine());
+        if ( memberId > 8000 && memberId < 9999) 
+          return memberId;
+        
+      }else{
+        System.out.print("Please input your member ID [input 0 for guest]:");
+        int memberId = Integer.parseInt(sc.nextLine());
+        if (memberId <= 0 || memberId == 9999 || memberId > 8000 && memberId < 8999)
+        return memberId;
+      }
+
+
+    } catch (NumberFormatException e) {
+      System.out.println("Input Error");
+      System.exit(1);
+    }
+    throw new InvalidInputException();
+  }
+
+  public static void inputOrder() throws InvalidInputException {
+    printMenu();
+    System.out.print("Select food:");
+    String foodOrder = sc.nextLine().toUpperCase();
+
+    if (!isValidFoodOrderChar(foodOrder))
+      throw new InvalidInputException();
+
+    currentFoodOrder.setFoodOrder(foodOrder);
+    orders.add(currentFoodOrder);
+  }
+
+  private static boolean isValidFoodOrderChar(String foodOrder) {
+
+    if (foodOrder.length() > 2 || foodOrder.length() == 0)
+      return false;
+
+    char value = foodOrder.charAt(0);
+    return (value >= 65 && value <= 65 + menus.length)? true: false;
+  }
+
+  public static void adminFunc() throws InvalidInputException {
+    try {
+      printAdminMenu();
+      System.out.print(">");
+      int adminFuncInput = Integer.parseInt(sc.nextLine());
+      if (!isValidAdminFunction(adminFuncInput))
+        throw new InvalidInputException();
+
+      if (adminFuncInput == 1)
+        new AdminPrintOrderList(orders).execute();
+      else if (adminFuncInput == 2) {
+        int memberId = inputMemberId(true);
+        if (!orders.contain(memberId))
+          throw new NoneOfOrderException();
+        new AdminRemoveOrder(memberId, orders).execute();
+        
+      } else
+        throw new InvalidInputException();
+
+    } catch (NumberFormatException e) {
+      throw new InvalidInputException();
+    }
+
+  }
+
+  private static boolean isValidAdminFunction(int input) {
+    return (input == 1 || input == 2)? true: false;
+  }
+
+}