/// <summary>
/// Displays a menu and get a valid numeric response from the user.
/// </summary>
/// <returns>An integer representing the menu choice the user chose.</returns>
public int DisplayMenuAndGetResponse(MenuItemsSet menuItemsSet, string menuTitle)
{
// Print the menu's title
Console.WriteLine();
Console.WriteLine(menuTitle);
Console.WriteLine();
// (Used to write the menu number. Will be incremented in each pass through the upcoming loop.)
int currentMenuNumber = 1;
// Print off each menu item in the menu items set. Write the number before each one and increment for every time you print a menu item.
foreach (string menuItem in menuItemsSet.MenuItems)
{
Console.WriteLine(currentMenuNumber + ". " + menuItem);
currentMenuNumber++;
}
// (This while loop will exit on a return statement)
while (true)
{
// (Used to store the converted numeric user input)
int numericValidUserInput;
// Prompt for a menu selection
string rawUserInput = GetStringResponse("Enter a menu option");
// If the selection is valid [is it a number? Is that number between 1 and the last item in the list of menu items?]
if (int.TryParse(rawUserInput, out numericValidUserInput) && numericValidUserInput >= 1 && numericValidUserInput <= menuItemsSet.MenuItems.Count)
{
// We have a valid answer; return the data.
return numericValidUserInput;
}
else
{
// We don't have a valid answer - display an error
DisplayMessage("That is not a valid option. Please make a valid choice.");
}
}
}
/// <summary>
/// Initializes the data that the program will be working with.
/// </summary>
private static void initializeData()
{
// TODO: This data technically has to do with the user interface, but it's specific to this program only - hence why I put it in Program.cs.
// The User Interface class is meant to be extremely generic so that it can be utilized more dynamically, so all specific data that
// only applies to this single program was written in Program.cs.
// Object initialization
userInterface = new UserInterface();
beverageDatabaseHook = new BeverageZDwyerEntities();
// Data initialization (don't have to do it here, technically, but figured might as well)
greeting = "Welcome to the beverage database management system.";
dontAddBeveragesWithTheSameID = true; // Should we add beverages to the database that have a duplicate id?
/* MENU ITEM SET INITIALIZATION */
/* (MenuItemSet objects are used by the DisplayMenuAndGetResponse method in UserInterface to draw a menu) */
/* (The MenuItemSet constructor can take a variable amount of strings with the params argument specifier I just found out about a few minutes ago lol) */
// Main menu
mainMenuItemsSet = new MenuItemsSet
(
"Print all beverages",
"Retreive beverage by property or ID",
"Add a new beverage",
"Update an existing beverage",
"Delete a beverage",
"Exit program"
);
// Find item by property menu
findItemByWhatMenuItemsSet = new MenuItemsSet
(
"ID",
"Name",
"Pack",
"Price",
"Active status",
"(Back to main menu)"
);
// Find beverages with a price that is... menu
priceMenuItemsSet = new MenuItemsSet
(
"...less than or equal to a given value",
"...equal to a given value",
"...more than or equal to a given value"
);
// Find by active status menu
findItemByActiveStatus = new MenuItemsSet
(
"Is active",
"Is not active"
);
}