/*
* The brewDrink method handles the logic-side details of ingredients and calls
* brew if the ingredients exist to create the drink.
*
* Drink newDrink: is the drink to be made, defined by the Drink class
* Returns: a display string for customer feedback
*/
public string brewDrink(Drink newDrink)
{
//Checks first that water is connected to the machine
if (waterConnected)
{
//Checks the sugar and milk levels, if the drink requires them
if(newDrink.SugarCount >= 1)
{
if (checkSugar(newDrink.SugarCount)) { }
else return "Not enough sugar. Please contact administration to refill this ingredient.";
}
if (newDrink.MilkCount >= 1)
{
if (checkMilk(newDrink.MilkCount)) { }
else return "Not enough milk. Please contact administration to refill this ingredient.";
}
//Coffee only needs to be checked for coffee drinks, which are given the type 1 to distinguish
//them from other drinks
if (newDrink.DrinkType == 1)
{
//In case a non-Coffee class drink is wrongly defined as coffee, we have
//a try-catch
try
{
Coffee coffee = (Coffee)newDrink;
if (coffee.CoffeeCount >= 1)
{
if (checkCoffee(coffee.CoffeeCount)) { }
else return "Not enough coffee. Please contact administration to refill this ingredient.";
}
}
catch (Exception e)
{
return "Error in drink definition. Please contact the service helpdesk.";
}
}
//Upon reaching this point, all ingredients can be assured
if (newDrink.SugarCount >= 1) currentSugar -= 1;
if (newDrink.MilkCount >= 1) currentMilk -= newDrink.MilkCount;
if (newDrink.DrinkType == 1)
{
Coffee coffee = (Coffee)newDrink;
currentCoffee -= coffee.CoffeeCount;
}
//The payment goes through, or the coins are moved to main storage
machineTotal = paymentReceived - newDrink.DrinkPrice;
paymentReceived = 00.00m;
//Imaginary code to return excess customer funds
//Calls brew, to actually brew the drink
brew(newDrink);
return "Success!";
}
else return "Water not connected. Please contact the service helpdesk.";
}
/*
* brewDrink checks if the drink is paid for (according to payment received successfully
* by the machine) and then call upon the machine to brew the drink. On failure an error
* message is returned, other the message "Success!" is returned.
*/
public bool brewDrink(Drink newDrink)
{
string message = "";
if (myMachine.isPaidFor(newDrink))
{
message = myMachine.brewDrink(newDrink);
if (message.Equals("Success!"))
{
myCoffeeMachineForm.displayMessage("Your " + newDrink.DrinkName + " is ready. Enjoy!", "Message", false);
return true;
}
else
{
myCoffeeMachineForm.displayMessage(message, "Important", true);
}
}
else myCoffeeMachineForm.displayMessage("Additional payment is required.", "Message", false);
return false;
}
/*
* The initialise method fills the drink list with drinks. It first attempts to do this
* using a database, but failing that, uses hardcoded default drinks
*/
private void initialise()
{
bool success = false;
//Test code for entering values into the database:
//string query = "INSERT INTO drinks (idDrinks, DrinksName, DrinksDesc, DrinksType,DrinksPrice, UsesWater, IsCarbonated, CountSugar, CountMilk, CountCoffee) VALUES('001', 'Carbonated Water', 'A nice cold glass of carbonated water.', '0', '02.00', '1', '1', '0', '0', '0')";
//drinkDatabase.Insert(query);
//Fill the drink list from the database
if (drinkDatabase.fillDictionary())
{
myDrinkList = drinkDatabase.DrinkList;
}
//If the drink list contains values, the read from database is assumed to have been a success
if (myDrinkList != null) success = true;
//If initialising from the database failed, this fills myDrinkList with default values
if (!success)
{
myDrinkList = new Dictionary<int, Drink>();
//Drink: id, name, desc, type, price, water use, carbonation, sugar amount, milk amount
Drink coldWater = new Drink
(000, "Cold Water", "A nice cold glass of water.", 0, 01.00m, 1, false, 0, 0);
myDrinkList.Add(000, coldWater);
Drink carbonatedWater = new Drink
(001, "Carbonated Water", "A nice cold glass of carbonated water.", 0, 02.00m, 1, true, 0, 0);
myDrinkList.Add(001, carbonatedWater);
Drink hotWater = new Drink
(002, "Tea", "A nice hot cup of tea water.", 0, 05.00m, 2, false, 0, 0);
myDrinkList.Add(002, hotWater);
Drink milk = new Drink
(003, "Milk", "A nice cold glass of milk.", 0, 05.00m, 0, false, 0, 1);
myDrinkList.Add(003, milk);
//Coffee: id, name, desc, type, price, water use, carbonation, sugar amount, milk amount, coffee amount
Coffee blackCoffee = new Coffee
(010, "Black Coffee", "A steaming cup of black coffee.", 1, 10.00m, 2, false, 0, 0, 1);
myDrinkList.Add(010, blackCoffee);
Coffee sugarCoffee = new Coffee
(011, "Coffee with Sugar", "A steaming cup of coffee with added sugar.", 1, 15.00m, 2, false, 1, 0, 1);
myDrinkList.Add(011, sugarCoffee);
Coffee milkCoffee = new Coffee
(012, "Coffee with Milk", "A steaming cup of coffee with added milk.", 1, 15.00m, 2, false, 0, 1, 1);
myDrinkList.Add(012, milkCoffee);
Coffee milkSugarCoffee = new Coffee
(013, "House Coffee", "A steaming cup of coffee with added sugar and milk.", 1, 20.00m, 2, false, 1, 1, 1);
myDrinkList.Add(013, milkSugarCoffee);
}
}
/*
* The fillDictionary method fills the Dictionary myDrinkList with data from the
* database.
*/
public bool fillDictionary()
{
string query = "SELECT * FROM drinks";
//Open connection
if (this.OpenConnection() == true)
{
myDrinkList = new Dictionary<int, Drink>();
//Create Command
MySqlCommand cmd = new MySqlCommand(query, connection);
//Create a data reader and Execute the command
MySqlDataReader dataReader = cmd.ExecuteReader();
DataTable tableDrinks = new DataTable();
tableDrinks.Load(dataReader);
foreach (DataRow row in tableDrinks.Rows)
{
int id = (int)row["idDrinks"];
string name = (string)row["DrinksName"];
string desc = (string)row["DrinksDesc"];
int type = (int)row["DrinksType"];
decimal price = (decimal)row["DrinksPrice"];
int water = (int)row["UsesWater"];
int carbo = (int)row["IsCarbonated"];
int sugar = (int)row["CountSugar"];
int milk = (int)row["CountMilk"];
int coffee = (int)row["CountCoffee"];
bool bCarbo = false;
Drink tempDrink = null;
Coffee tempCoffee = null;
if (carbo > 0) bCarbo = true;
if (type == 0)
{
tempDrink = new Drink(id, name, desc, type, price, water, bCarbo, sugar, milk);
myDrinkList.Add(id, tempDrink);
}
else
{
tempCoffee = new Coffee(id, name, desc, type, price, water, bCarbo, sugar, milk, coffee);
myDrinkList.Add(id, tempCoffee);
}
}
//close Data Reader
dataReader.Close();
//close Connection
this.CloseConnection();
return true;
}
return false;
}
/*
* Brews the drink
*/
private bool brew(Drink newDrink)
{
//Imaginary machine code for actually brewing the drink
return true;
}
/*
* The checkPayment method checks that enough payment has been received by the
* machine for the current drink.
*
* Drink newDrink: is the drink to be made, defined by the Drink class
* Returns: a display string for customer feedback
*/
public bool isPaidFor(Drink newDrink)
{
if (paymentReceived >= newDrink.DrinkPrice) return true;
else return false;
}
/*
* On selecting an item in the combo box, the price is displayed for the customer, and
* a description appears on the info label.
*/
private void comboBoxDrinkList_SelectedIndexChanged(object sender, EventArgs e)
{
selectedDrinkName = comboBoxDrinkList.Items[comboBoxDrinkList.SelectedIndex].ToString();
//Searching for a matching drink name from the list - requiring names to be unique.
foreach (Drink drink in drinkCollection)
{
if(drink.DrinkName.Equals(selectedDrinkName))
{
labelPriceAmount.Text = drink.DrinkPrice.ToString();
selectedDrinkPrice = drink.DrinkPrice;
labelInfo.Text = drink.DrinkDesc;
selectedDrink = drink;
}
}
}
