/// <summary>
/// The Function that actually processes an order, Validates Order with the BankService and returns a confirmation.
/// </summary>
/// <param name="encoded_order_object">The encoded OrderObject string to process as an OrderObject, once it is decoded of course.</param>
public static void orderProcessor(string encoded_order_object)
{
//Decode string into an object:
OrderObject new_order_object = EnDecoder.Decode(encoded_order_object);
//Update total amount to account for Sales tax:
decimal total = BankService.formatCurrency((new_order_object.getAmount() + (new_order_object.getAmount() * SALES_TAX)));
new_order_object.setAmount(total);
//Create an encryption service via ASU's Repo:
Service encryption = new Service();
//Encrypt the credit card number:
string encrypted_cc_number = encryption.Encrypt(Convert.ToString(new_order_object.getCardNo()));
//encrypt the total amount to charge the account:
string encrypted_amount = encryption.Encrypt(Convert.ToString(new_order_object.getAmount()));
//Have Bank validate the Account charge given the encrypted credit card number and amount to charge:
new_order_object.setIsValid(BankService.confirmCreditCard(encrypted_cc_number, encrypted_amount));
//Get the Travel_agencies ID:
string travel_agency_id = new_order_object.getSenderID();
//Encode the Processed Order Object:
string encoded_processed_order = EnDecoder.Encode(new_order_object);
//Create a new thread to handle the processed order:
OrderProcessing.submitProcessedOrderObject(encoded_processed_order, travel_agency_id);
Thread processed_order_thread = new Thread(() => OrderProcessing.submitProcessedOrderObject(encoded_processed_order, travel_agency_id));
//Start the thread:
processed_order_thread.Start();
}
private event PriceCut price_cut_event; //A PriceCut event variable for the Hotel to emit to it's subscribers.
//----------------------------------------------------------------------------------------------------------------------------------
/// <summary>
/// This is the args constructor of the Hotel class.
/// </summary>
/// <param name="new_id">The unique string representation of an id for identifying and instance of this class.</param>
public Hotel(string new_id)
{
this.id = new_id; // Initialize the Hotel's ID.
this.current_number_of_available_rooms = MAX_ROOMS; // Initialize the Hotel's
this.current_pricecuts_made = 0; // Instantiate the current number of price cuts made. 20 is the max.
this.price_model = new PriceModel(this.price, this.current_number_of_available_rooms); // Instantiate a new Price Model object for this Hotel.
this.price = BankService.formatCurrency(((Hotel.MAX_PRICE + Hotel.MIN_PRICE) / 2)); // TODO::Initialize first price value using the price model;
OrderProcessing.addOrderToProcessListener(orderProcessHandler);
}
/// <summary>
/// This is the main function that handles hotel price cuts via PriceCut delegate created in Hotel.cs
/// </summary>
/// <param name="current_price">the current price of rooms in the Hotel.</param>
/// <param name="new_price">the new price of rooms in the Hotel.</param>
/// <param name="available_rooms">the current number of available rooms in the Hotel.</param>
/// <param name="hotel_id">The string id of the Hotel.</param>
public void hotelPriceBeenCut(decimal current_price, decimal new_price, int available_rooms, string hotel_id) //Using delegate in hotel.cs
{
int rooms_to_order;
int demand = 0; //Demand is a variable that will be used as a multiplier for how many rooms to order
int sum = Hotel.MAX_PRICE + Hotel.MIN_PRICE;
int avg = sum / 2;
Boolean do_buy = (new_price > (decimal)(1.15 * avg)) ? false : true;
//Take anywhere from 1-25% of the available rooms:
Random rand = new Random();
rooms_to_order = (int)(available_rooms / rand.Next(20, 80));
if ((do_buy) && (rooms_to_order > 0))
{
decimal amount = BankService.formatCurrency(rooms_to_order * new_price);
//create a new order Object:
OrderObject new_order_object = new OrderObject(this.agency_id, hotel_id, this.credit_card, rooms_to_order, amount, new_price, false);
//Place Order:
placeOrder(new_order_object);
}
}
/// <summary>
/// This function is the core of the Price model class. It uses the attributes of the price model to
/// </summary>
/// <returns>The new hotel price of its rooms</returns>
public decimal generateNewPrice()
{
//Price Modifiers:
decimal price_increase = 0; //Initial value of the price increase modifier.
decimal price_discount = 1; //Initial value of the price decrease modifier.
//If the availability of rooms is less than half (less supply), the drive for demand goes up, OR IF IT IS THE WEEKDAY:
if ((this.available_number_of_rooms < (Hotel.MAX_ROOMS / 3)) || ((mod_count % 7) < 5))
{
//Increase by 20%:
price_increase = BankService.formatCurrency((decimal)(this.current_price * 1.02M));
}
//If it is the (6 == ) Sunday discount or wild card discount, apply the discount:
Random wildcard = new Random();
int wildCardSpecials = wildcard.Next(0, 7);
if ((wildCardSpecials > 3) || (((mod_count % 7) > 4)))
{
//Set the discount modifier to 1.2 or essentially taking 20% off if there is a price increase, if there is no high demand, take 45% off hotel room price for weekends.
price_discount = (price_increase == 0) ? BankService.formatCurrency(1.35M) : BankService.formatCurrency(1.20M);
}
mod_count++;
this.current_price = BankService.formatCurrency(((this.current_price + price_increase) / price_discount)); //The actual Price model function.
if (this.current_price < Hotel.MIN_PRICE)
{
this.current_price = BankService.formatCurrency(Hotel.MIN_PRICE);
} //Adjust price if model goes over minimum Hotel price.
else if (this.current_price > Hotel.MAX_PRICE)
{
this.current_price = BankService.formatCurrency(Hotel.MAX_PRICE);
} //Adjust price if model goes over maximum Hotel price
//this.current_price = test.Next(MIN_PRICE,MAX_PRICE+1);
return(this.current_price); //Return the new price.
}
/// <summary>
/// This function is for use of External Services. Provided a credit card number and an amount to charge to the credit card number, this function verifies the card, and the amount to charge.
/// That is, provided the card exists, and the client associated to that card has sufficient funds, the client will be charged the specified amount, and the function will return a confirmation
/// to the calling service.
/// </summary>
/// <param name="credit_card_number">The credit card number to charge.</param>
/// <param name="amt_to_charge">the amount to charge to the account associated to the specified credit card number.</param>
/// <returns>Returns a "valid" confirmation if the account was successfully charged, and "not valid" if the account was not succesfully charged.</returns>
public static Boolean confirmCreditCard(String credit_card_number, String amt_to_charge)
{
//Decrypt Received data:
String cc_decrypted_data = decryptReceivedData(credit_card_number);
String amt_decrypted_data = decryptReceivedData(amt_to_charge);
//Convert decrypted String data to integer representation of credit card number:
Int32 cc_number = Convert.ToInt32(cc_decrypted_data);
decimal amount_to_charge_cc = BankService.formatCurrency(Convert.ToDecimal(amt_decrypted_data));
//Confirm Valid account with provided credit card number:
if (clients.ContainsKey(cc_number))
{
//If Client has sufficient funds, charge the client's account and return a valid confirmation:
if (withdrawFromClientAmount(amount_to_charge_cc, cc_number))
{
//Return valid confirmation:
return(true);
}
}
//Else return not valid confirmation:
return(false);
}
/// <summary>
/// This is the main function/method, where the application logic ties together all of the classes and services in this project into a meaningful, event-driven application.
/// </summary>
/// <param name="args">Any commandline arguments passed in. This application does not use this however.</param>
static void main(string[] args)
{
const int NUM_OF_HOTELS = 1;
const int NUM_OF_TRAVEL_AGENCIES = 2;
//Print Out the E-Commerce ecosystem setup:
//--------------------------------------------------------------------------------
Console.WriteLine("E-Commerce System:");
Console.WriteLine("Number of Hotels: {0}", NUM_OF_HOTELS);
Console.WriteLine("Number of Travel Agencies: {0}", NUM_OF_TRAVEL_AGENCIES);
Console.WriteLine();
//--------------------------------------------------------------------------------
Console.WriteLine("Simply press the enter key to run ecommerce simulation.\nEnter \"esc\" to cancel start of ecommerce");
Console.Write(": ");
string input = Console.ReadLine();
if (input == "esc")
{
Console.WriteLine("Exiting E-Commerce Simulation Program..."); //Notify User that application is exiting.
System.Environment.Exit(0); //Safely Exit main program/function.
}
//Otherwise continue on with the Simulation:
ArrayList travel_agencies = new ArrayList();
ArrayList hotel_threads = new ArrayList();
Random rand = new Random(); //Create a random number generator to randomly select the amount of money a travel agency with set up their bank account with.
//Generate all of the Travel Agencies. have them apply for a new account with the bank, and finally, store them in the travel agency list:
for (int i = 0; i < NUM_OF_TRAVEL_AGENCIES; i++)
{
//Create a new travel agency, giving it it's own unique id:
TravelAgency new_agency = new TravelAgency("ta_" + i);
//Have the new travel agency apply for a new credit card number with the bank. The bank will create an account for the travel agency with the amount they deposited and
//issue them a new credit card number. Set the new agency's credit card number to this issued value returned by the Bnak's addClient function.:
new_agency.setCCNumber(BankService.addClient(new_agency.getID(), rand.Next(1500, 5001)));
//Finally, store the new agency in the travel agenct arraylist:
travel_agencies.Add(new_agency);
}//END FOR LOOP.
//Generate all of the Hotels, and have each of the travel agencies subscribe to each of the Hotel's priceCut events, finally store each hotel as a new thread in the hotels arraylist:
for (int i = 0; i < NUM_OF_HOTELS; i++)
{
//Create a new hotel giving it a unique id:
Hotel new_hotel = new Hotel("ht_" + i);
//For each travel agency, have it subscribe to this new hotel's price cut event:
for (int t = 0; t < NUM_OF_TRAVEL_AGENCIES; t++)
{
new_hotel.subscribeHandlerToPriceCutEvents(((TravelAgency)travel_agencies[t]).hotelPriceBeenCut);
}
//Store the new Hotel as a new thread in the arraylist:
hotel_threads.Add(new Thread(new_hotel.hotelFunc));
}//END FOR LOOP.
//Once Everything has been initialized:
//Start all of the Hotel Threads that were setup and stored in an arraylist earlier:
for (int i = 0; i < hotel_threads.Count; i++)
{
((Thread)hotel_threads[i]).Start();//Call the thread's Start() function.
}
//Finally, as the Threads finish, join:
for (int i = 0; i < hotel_threads.Count; i++)
{
((Thread)hotel_threads[i]).Join();//Call the thread's Join() function.
}
//Give a good enough to for all the threads to finish up and close out:
Thread.Sleep(1000);
Console.WriteLine("Program Terminating...");
} //END MAIN METHOD.
/// <summary>
/// This is the args constructor of the PriceModel Class.
/// </summary>
/// <param name="price">The current price of the Hotel's rooms.</param>
/// <param name="available_rooms">The current number of available rooms in the Hotel.</param>
public PriceModel(decimal price, int available_rooms)
{
this.current_price = BankService.formatCurrency(price);
this.available_number_of_rooms = available_rooms;
this.mod_count = 0;
}
/// <summary>
/// This Getter function returns the total amount a Client has in the Bank in the proper format (to 2 decimal places).
/// </summary>
/// <returns>The decimal amount a Client has in the bank.</returns>
public decimal getClientAmount()
{
return(BankService.formatCurrency(this.amount));//properly round decimal value for accuracy whilst handling currency.
}
/// <summary>
/// This is an args constructor of the private Client class in the BankService class. This function constructs a new Client, provided a new credit card number, client ID, and an initial amount.
/// </summary>
/// <param name="cId">The new Client's ID that the banking system uses to identify the customer/client with.</param>
/// <param name="cNumber">The new client's credit card number, which will be used for various transactions.</param>
/// <param name="amt">The currecny amount that the client has in the banking system.</param>
public Client(String cId, int cNumber, decimal amt)
{
this.clientID = cId;
this.cardNo = cNumber;
this.amount = BankService.formatCurrency(amt);
}