- Author: Name
- Task: Restaurant management
Table of Contents:
- 1. Task1
- 2. Task2
- 3. Task3
- 4. UML Use Case Diagram
- 5. UML Class Diagram
- 6. UML Sequence Diagrams
- 7. Extra Work
Can list available tables (depending on the time)
After the phone operater enters his/her name, there will be a option menu for 3 different tasks, as below
Console.WriteLine("What can I do for you? Please select one from below (Press the Number on your keyboard)");
Console.WriteLine("---------------------------------------------------------------");
Console.WriteLine("1. Check free tables with a certain time");
Console.WriteLine("2. Make a reservation");
Console.WriteLine("3. Check the daily Menu");
Console.WriteLine("Press the Escape (Esc) key to quit:");
Console.WriteLine("Current time is: {0}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
Console.WriteLine("---------------------------------------------------------------\n");
input = Console.ReadKey(true);Then user can use the number 1 key on the keyboard to choose option 1, then if statement will go to the section below. Here op is a object of Class Operator
// option 1
if (input.Key == ConsoleKey.D1)
{
Console.Write("---> 1\n");
Console.WriteLine("Please input the date and time in format (YYYY-MM-DD HH:MM:SS)");
string date = Console.ReadLine();
// first check if the input string can be parsed to 'DateTime' data type
if (DateTime.TryParse(date, out datetime))
{
//operate will go and check the availabilities of all the tables
op.CheckAvailableTables(datetime);
}
else
{
//invalid input string format
Console.WriteLine("Sorry, your input time format is invalid.");
}
}In class Operator, the function CheckAvailableTables is below:
/*
check available tables
Parameters: DateTime
Return: Void
Procedures:
1) Valid time
2) Search for the availabilites of every table
3) Print results
*/
public void CheckAvailableTables(DateTime dateTime)
{
// Check if the input time is
if (!validateTime(dateTime))
{
return;
}
Console.Write("Available tables are:");
StringBuilder sb = new StringBuilder();
// Search for every table
foreach (var table in tables)
{
if (table.IsAvailable(dateTime))
{
sb.AppendFormat(" {0}",table.Id);
}
}
if (sb.Length==0)
{
sb.Append(" Sorry, no available tables");
}
sb.Append("\n");
Console.Write(sb.ToString());
}In class Table, the function IsAvailable is below:
public bool IsAvailable(DateTime dateTime)
{
if (_reservations.Count == 0)
{
return true;
}
else
{
foreach (var booking in _reservations)
{
// go through all the reservation, check if the time is overlapping
if (!booking.IsOverlapping(dateTime))
{
return true;
}
}
return false;
}
}In the class Reservation, the function IsOverlapping is below. Here the program supposes that the eating hour for each reservation is 2 hours.
public bool IsOverlapping(DateTime dateTime)
{
if (dateTime.AddHours(2).CompareTo(_arrivalTime)<=0 || dateTime.CompareTo(_endTime)>=0)
{
return false;
}
else
{
return true;
}
}I tested the solution by running the application and below are screenshots of the result:
Login step
Option list
List tables depending on the time
Can assembly reservation by setting the time of the arrival, the number of guests, and name of the person who books the table.
After the phone operater enters his/her name, the application will load dafault data for it, as below.
/*
Class Operator
Load default settings
Parameters:
Return:
Procedures:
1) add 5 tables
2) add menu items
*/
void loadSettings()
{
// create 5 tables
for (int i = 0; i < 5; i++)
{
tables.Add(new Table(i));
}
// create random menu items
menu.AddMenuItem("Peach and strawberry biscuits", "Crunchy biscuits made with fresh peach and strawberries", 300, DayOfWeek.Monday);
menu.AddMenuItem("Currant and courgette cake", "Moist cake made with fresh currant and courgette", 300, DayOfWeek.Tuesday);
menu.AddMenuItem("Squash and monkfish curry", "Mild curry made with pattypan squash and monkfish", 300, DayOfWeek.Wednesday);
menu.AddMenuItem("Plaice and pepper salad", "A crisp salad featuring plaice and orange pepper", 300, DayOfWeek.Thursday);
menu.AddMenuItem("Venison and curly kale salad", "A crisp salad featuring venison and curly kale", 300, DayOfWeek.Friday);
menu.AddMenuItem("Pancetta and avocado fusilli", "Fresh egg pasta in a sauce made from smoked pancetta and", 300, DayOfWeek.Saturday);
menu.AddMenuItem("Garam masala and squash bread", "Crunchy bread made with garam masala and pattypan squash", 300, DayOfWeek.Sunday);
menu.AddMenuItem("Duck and chilli skewers", "amboo skewers loaded with duck and firey chilli", 300, DayOfWeek.Monday);
menu.AddMenuItem("Salmon and pecan crepes", "Fluffy crepes filled with freshly-caught salmon and pecan", 300, DayOfWeek.Tuesday);
menu.AddMenuItem("Chervil and red cabbage salad", "Chervil and red cabbage served on a bed of lettuce", 300, DayOfWeek.Tuesday);
}Then there will be a option menu for 3 different tasks, as shown in Task1
Then user can use the number 2 key on the keyboard to choose option 2, then if statement will go to the section below. Here op is a object of Class Operator
// option 2
if (input.Key == ConsoleKey.D2)
{
Console.Write("---> 2\n");
Console.WriteLine("Please input the arrival time in format (YYYY-MM-DD HH:MM:SS)");
string date = Console.ReadLine();
// first check if the input string can be parsed to 'DateTime' data type
if (DateTime.TryParse(date, out datetime))
{
// request the guest name
Console.Write("Please input name of the guest:");
string guest_name = Console.ReadLine();
// request the number of guests
Console.Write("Please input number of the guests:");
string guest_count_str = Console.ReadLine();
int guest_count_num = Int32.Parse(guest_count_str);
// make the reservation with the info above
op.AssembleReservation(guest_name,guest_count_num,datetime);
}
else
{
//invalid input string format
Console.WriteLine("Sorry, your input time format is invalid.");
}
}In class Operator, the function AssembleReservation is below. It will print if the reserversion successes.
/*
make the reservation
Parameters: string guest_name, int guest_count, DateTime arrival_time
Return: bool
Procedures:
1) Valid time
2) Add the reservation to the first availble table
3) Print results
*/
public bool AssembleReservation(string guest_name, int guest_count, DateTime arrival_time)
{
if (!validateTime(arrival_time))
{
Console.WriteLine("Reservation Failed");
return false;
}
foreach (var table in tables)
{
if (table.AddReservation(guest_name,guest_count,arrival_time))
{
Console.WriteLine("Reservation Success!");
return true;
}
}
Console.WriteLine("Reservation Failed");
return false;
}In the class Table, the function AddReservation is below.
/*
Class Table
Add reservation to the table
Parameters: string guest_name, int guest_count, DateTime arrival_time
Return: bool (true if success, false otherwise)
Procedures:
1) check if it is available with the given time
2) make the reservation
*/
public bool AddReservation(string guest_name, int guest_count, DateTime arrival_time)
{
if (IsAvailable(arrival_time))
{
_reservations.Add(new Reservation(this._id, guest_name, guest_count, arrival_time));
return true;
}
else
{
return false;
}
}In the class Reservation, the constructor is below.
public Reservation(int n, string guest_name, int guest_count, DateTime arrival_time)
{
this._tableId = n;
this._guestName = guest_name;
this._guestCount = guest_count;
this._arrivalTime = arrival_time;
// suppose each meal will last 2 hours
this._endTime = this._arrivalTime.AddHours(2);
}I tested the solution by running the application and below is a screenshot of the result.
Assemble a reservation with guest name, number of guests and arrival time: 
Can list the daily menu
After the phone operater enters his/her name, the application will load dafault data for it, as shown in Task2.
Then there will be a option menu for 3 different tasks, as shown in Task1
Then user can use the number 3 key on the keyboard to choose option 3, then if statement will go to the section below. Here op is a object of Class Operator
// option 3
if (input.Key == ConsoleKey.D3)
{
Console.Write("---> 3\n");
Console.WriteLine("Please input the date the format (YYYY-MM-DD)");
string date = Console.ReadLine();
// first check if the input string can be parsed to 'DateTime' data type
if (DateTime.TryParse(date, out datetime))
{
//operate will go check the menu
op.ShowDailyMenu(datetime);
}
else
{
//invalid input string format
Console.WriteLine("Sorry, your input time format is invalid.");
}
}In class Operator, attribute menu will be created with a operator object.
public class Operator
{
string _name;
Menu menu = new Menu();
List<Table> tables = new List<Table>();
public Operator(string name)
{
this._name = name;
loadSettings();
Console.WriteLine("Welcome {0}", this._name);
}
//...other parts
}In class Operator, function ShowDailyMenu is below. It will call the printDailyMenu function in class Menu.
public void ShowDailyMenu(DateTime date)
{
menu.printDailyMenu(date);
}In class Menu, the function printDailyMenu is below.
/*
Class Menu
Print all the menu item according the day of the week
Parameters: DateTime
Return: void
Procedures:
1) loop every item
2) they are available on that day of the week
3) print the menu information
*/
public void printDailyMenu(DateTime date)
{
Console.WriteLine("Menu for {0}:",date.DayOfWeek.ToString());
foreach (var item in menuItems)
{
if (item.CheckAvailableDay(date.DayOfWeek))
{
item.Print_Item_info();
}
}
}In class MenuItem, the function Print_Item_info and the function CheckAvailableDay are below.
// print the inforamtion of the item
public void Print_Item_info()
{
Console.WriteLine();
Console.WriteLine("Name: {0}\nPrice: {1}\ndescription: {2}", _name, _price, _description);
}
// check if the day of week include in the '_availableDays' attribute of the MenuItem
public bool CheckAvailableDay(DayOfWeek day)
{
if (_availableDays.Contains(day))
{
return true;
}
else
{
return false;
}
}I tested the solution by running the application and below is a screenshot of the result.
List the daily menu depending on the date:
Check available tables
Assemble a reservation
-
Git:
- Inside local file folder
- Github repo https://github.com/dhao24/DSA_HW
-
The command line Human Computer Interaction
- Even though it is not a GUI application, but it has a very nice Human Computer Interaction expericence.
- It will always return user to the main option menu after user finishes one operation.
- In the main option menu, user can only use
Number key 1,Number key 2,Number key 3andESCto interact with the application. Other choices will be invalid with no response.