public IActionResult Authenticate(string username, string password)
{
User user = db.Users.FirstOrDefault(x => x.Username == username && x.Password == password);
if (user == null)
{
ViewData["errMsg"] = "No such user or incorrect password";
return(View("Login"));
}
Session session = new Session()
{
Id = Guid.NewGuid().ToString(),
UserId = user.UserId,
Timestamp = DateTimeOffset.Now.ToUnixTimeSeconds()
};
db.Sessions.Add(session);
db.SaveChanges();
// the sequence of steps below matters.
AddNewItemsToCart(Environment.MachineName, session.UserId.ToString());
Response.Cookies.Append("sessionId", session.Id);
Response.Cookies.Append("userId", session.UserId.ToString());
Response.Cookies.Append("Username", db.Users.FirstOrDefault(x => x.UserId == session.UserId).Username);
return(RedirectToAction("ListProducts", "Product"));
}
/* check if username and password are both in Users db*/
public IActionResult Authenticate(string username, string password)
{
/* get record in Users db */
User user = db.Users.FirstOrDefault(x => x.Username == username &&
x.Password == password);
/* if no record from Users db was returned, show error msg
* else (record from Users db was returned), user is authenticated*/
/* authenication failed*/
//--- show error msg in Login page
if (user == null)
{
ViewData["errMsg"] = "no such user or incorrect password";
return(View("Login"));
}
/* authentication passed*/
//-- create new session record in Sessions db
Session session = new Session()
{
Id = Guid.NewGuid().ToString(),
UserId = user.UserId,
Timestamp = DateTimeOffset.Now.ToUnixTimeSeconds()
};
db.Sessions.Add(session);
db.SaveChanges();
//-- create a new cookie in the user's browser
Response.Cookies.Append("sessionId", session.Id);
// check if a cookie was sent to identify guest who added to cart
string fakeUserId = HttpContext.Request.Cookies["cartItems"];
// if user added to cart before logging in,
// add any new items to their existing cart
// and return them to the View Cart page
if (fakeUserId != null)
{
AddNewItemsToCart(session, fakeUserId);
HttpContext.Response.Cookies.Delete("cartItems"); //delete the cookie that was used to track the guest(fakeUserId)
return(RedirectToAction("Cart", "Cart"));
}
// else (user did not to cart before logging in,)
// return user to Gallery page
Response.Cookies.Append("username", username);
return(RedirectToAction("Index", "Gallery"));
}
//receive JSON data from Add.js. (When an item is added to the cart from gallery)
public JsonResult AddItemToCart([FromBody] Addinput product)
{
string sessionId; try { sessionId = HttpContext.Request.Cookies["sessionId"]; } catch (NullReferenceException) { sessionId = null; }
string userId; if (sessionId != null)
{
userId = HttpContext.Request.Cookies["userId"];
}
else
{
userId = Environment.MachineName;
}
CartItem item = db.Cart.FirstOrDefault(x => x.UserId == userId && x.pId == product.ProductId);
if (item == null)
{
item = new CartItem();
item.UserId = userId;
item.pId = product.ProductId;
item.Quantity = 1;
item.product = db.Products.FirstOrDefault(x => x.ProductId == int.Parse(product.ProductId));
db.Add(item);
}
else
{
item.Quantity += 1;
db.Update(item);
}
db.SaveChanges();
List <CartItem> cart = db.Cart.Where(x => x.UserId == userId).ToList();
int total = 0;
foreach (CartItem x in cart)
{
total += x.Quantity;
}
return(Json(new
{
status = "success",
total = total
}));
}
public IActionResult Authenticate(string username, string NewPWD, string ConfirmedPWD)
{
User user = db.Users.FirstOrDefault(x => x.Username == username);
if (user == null)
{
if (NewPWD == ConfirmedPWD)
{
User users = new User()
{
Username = username,
Password = NewPWD,
};
db.Add(users);
db.SaveChanges();
return(RedirectToAction("Login", "Login"));
}
else
{
ViewData["errMsg"] = "Please enter a consistent password";
return(View("Index"));
}
}
else
{
ViewData["errMsg"] = "user has existed";
return(View("Index"));
}
}
public string Cart([FromBody] ChangeInput change)//receive JSON object from Cart.js when the number in the cart is changed
{
Session session = db.Sessions.FirstOrDefault(x => x.Id == HttpContext.Request.Cookies["sessionId"]);
int tempProd = int.Parse(change.ProductId);
int tempValue = int.Parse(change.Value);
if (session == null) //if the user is not login
{
string fakeUserId = HttpContext.Request.Cookies["cartItems"]; //get the guest fakeuserid
CartItem cartitem = cartitems.map[fakeUserId]; //get the guest cartitem information based on the fakeuserid (same idea as the sessions in workshop)
//inside cartitem class is a list of KeyValuePair of <int,int> --> can refer to the cartitem class file for more information
//KeyValuePair is used to store the productid and quantity of each of the products.
for (int i = 0; i < cartitem.item.Count(); i++)
{
if (cartitem.item[i].Key == tempProd) //update the quantity of the KeyValuePair with the productId passed in
{
cartitem.item.Remove(cartitem.item[i]);
cartitem.item.Add(new KeyValuePair <int, int>(tempProd, tempValue));
}
}
}
else //else if the user is login
{
int userid = session.UserId;
List <Cart> carts = db.Carts.Where(x => x.UserId == userid).ToList();
foreach (Cart item in carts)//Update the cart of the user with the new value into the databse
{
if (item.ProductId == tempProd)
{
item.Quantity = tempValue;
db.SaveChanges();
}
}
;
}
object data = new
{
status = "success"
};
return(JsonSerializer.Serialize(data));
}
public static void AddActivationCode(Cart cart, Team5_Db db)
{
for (int i = 0; i < cart.Quantity; i++)
{
OrderDetail order = new OrderDetail
{
ActivationCode = Guid.NewGuid().ToString().Substring(3, 15),
UserId = cart.UserId,
ProductId = cart.ProductId,
PurchaseDate = DateTime.Today.Date
};
db.Add(order);
db.SaveChanges();
}
return;
}
[HttpPost] //when the cart is submitted for purchase
public IActionResult Transaction()
{
Session session = db.Sessions.FirstOrDefault(x => x.Id == HttpContext.Request.Cookies["sessionId"]);
if (session == null)//if not login, redirect to login page
{
return(RedirectToAction("Login", "Login"));
}
int userid = session.UserId;
List <Cart> carts = db.Carts.Where(x => x.UserId == userid).ToList();
foreach (Cart item in carts) //for each item in the carts
{
ActivationC.AddActivationCode(item, db); //call a method to generate the activationcode and update to the orderdetail database (please refer to the ActivationC class)
db.Carts.Remove(item); //remove the item from the Carts database
}
db.SaveChanges();
return(RedirectToAction("Index"));
}
//receive JSON data from Add.js. (When an item is added to the cart from gallery)
public JsonResult Addin([FromBody] Addinput addinput)
{
Session session = db.Sessions.FirstOrDefault(x => x.Id == HttpContext.Request.Cookies["sessionId"]);
bool newItem = true;
int productid = int.Parse(addinput.ProductId);
int total = 0;
//if the user is not login, their session will be null
if (session == null)
{
//fakeUserId is a cookies that will be sent to the guest(not login) to track their activity
string fakeUserId = HttpContext.Request.Cookies["cartItems"];
CartItem cartitem;
//if they dont have this cookies(null), create a cookie of fakeUserId and send to them
if (fakeUserId == null)
{
fakeUserId = Guid.NewGuid().ToString();
Response.Cookies.Append("cartItems", fakeUserId);
cartitem = new CartItem();
}
else //else if they have the fakeUserId cookie, find their record from the cartitems
{
cartitem = null;
cartitems.map.TryGetValue(fakeUserId, out cartitem); //check if the fakeUserId is in our record or not
if (cartitem == null) //if its not in our record
{
cartitem = new CartItem();
}
}
//inside cartitem class is a list of KeyValuePair of <int,int> --> can refer to the cartitem class file for more information
//KeyValuePair is used to store the productid and quantity of each of the products.
foreach (KeyValuePair <int, int> item in cartitem.item)
{
if (item.Key == productid) //to check if the product has been added before
{
newItem = false;
}
}
if (cartitem.item.Count() == 0 || newItem == true) //if its a new product or the list is empty
{
cartitem.item.Add(new KeyValuePair <int, int>(productid, 1)); //Add a new KeyValuePair of this productid with quantity of 1
}
else
{
for (int i = 0; i < cartitem.item.Count(); i++)
{
if (cartitem.item[i].Key == productid) //get the KeyValuePair of that particular product and increment the quantity by 1
{
int quantity = cartitem.item[i].Value;
cartitem.item.Remove(cartitem.item[i]);
cartitem.item.Add(new KeyValuePair <int, int>(productid, quantity + 1));
break;
}
}
}
cartitems.map[fakeUserId] = cartitem; //update the cartitems (cartitems is a singleton object that store cartitem of guest)(Same idea as sessions in the workshop)
//this part is to get the total quantity of products that the guest has. So that can be reflected on the cart image.
for (int i = 0; i < cartitem.item.Count(); i++)
{
total += cartitem.item[i].Value;
}
}
else //else if the user has login
{
List <Cart> carts = db.Carts.Where(x => x.UserId == session.UserId).ToList(); //get the carts information of the user
foreach (Cart item in carts) //check if its a item or not
{
if (item.ProductId == productid)
{
newItem = false;
}
}
if (carts.Count() == 0 || newItem == true) //if its a new item or the user has no items in his cart
{
Cart item = new Cart
{
UserId = session.UserId,
ProductId = productid,
Quantity = 1
};
db.Add(item);
db.SaveChanges();//save the item to the user cart database
}
else //else if its not a new item
{
foreach (Cart item in carts)//get the cart row and increment the quantity by 1
{
if (item.ProductId == productid)
{
item.Quantity += 1;
db.SaveChanges();
}
}
}
//this part is to get the total quantity of products that the user has. So that can be reflected on the cart image.
carts = db.Carts.Where(x => x.UserId == session.UserId).ToList();
foreach (Cart item in carts)
{
total += item.Quantity;
}
}
//return the total as JSON to the Add.js
return(Json(new
{
status = "success",
total = total
}));
}
