/// <summary>
/// Delete an item from the server
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public async Task <ResultFromServer> DeleteFromServer(AbstractItem item)
{
var values = new Dictionary <string, string>();
values.Add("Guid", item.Guid.ToString());
return(await Server.Connect("DeleteBook.php", values));
}
/// <summary>
/// Add item to the server
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public async Task <ResultFromServer> AddItemToServer(AbstractItem item)
{
var values = new Dictionary <string, string>();
values.Add("BookName", item.ItemName);
values.Add("Date", ((DateTimeOffset)item.Date).ToString("d"));
values.Add("CopyNumber", item.CopyNumber.ToString());
values.Add("Guid", item.Guid.ToString());
// The url should be encrypted, otherwise the server will prohibit store links
values.Add("CoverImage", Crypt.Encrypt("boris", item.CoverImage));
if (item is Book)
{
values.Add("Category", ((Book)item).Category.ToString());
}
else
{
values.Add("Category", ((Journal)item).Category.ToString());
}
values.Add("SubCategory", item.SubCategory);
values.Add("BorrowedCopies", item.BorrowedCopies.ToString());
if (await Server.Connect("AddBook.php", values) != ResultFromServer.Yes)
{
return(ResultFromServer.ConnectionFailed);
}
return(ResultFromServer.Yes);
}
/// <summary>
/// Getting the users from the server
/// </summary>
/// <returns></returns>
public async Task <ResultFromServer> GetUsersFromServer()
{
var result = await Server.Connect("GetUsers.php");
if (result == ResultFromServer.Yes)
{
// The retrieved content from the server
string[] words = Server.ResponseWords;
for (int i = 0; i < (words.Length - 4); i += 4)
{
User newUser = new User();
newUser.Username = words[0 + i];
newUser.FirstName = words[1 + i];
newUser.LastName = words[2 + i];
if (words[3 + i] == "1")
{
newUser.IsAdmin = true;
}
else
{
newUser.IsAdmin = false;
}
_users.Add(newUser);
}
return(ResultFromServer.Yes);
}
return(ResultFromServer.ConnectionFailed);
}
/// <summary>
/// Transforms the user into an administrator
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <ResultFromServer> MakeUserAdmin(User user)
{
var values = new Dictionary <string, string>();
values.Add("Username", user.Username);
return(await Server.Connect("MakeMeAdmin.php", values));
}
/// <summary>
/// Authentication by username and password
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <ResultFromServer> Authentication(User user)
{
var values = new Dictionary <string, string>();
values.Add("Username", user.Username);
values.Add("Password", user.Password);
//Checking if the username and password is correct
var result = await Server.Connect("Login.php", values);
if (result == ResultFromServer.Yes)
{
values.Remove("Password");
//Checking if the user is administrator
var result2 = await Server.Connect("IsAdmin.php", values);
if (result2 == ResultFromServer.ConnectionFailed)
{
return(result2);
}
CurrentUser.IsAdmin = result2 == ResultFromServer.Yes;
CurrentUser.Username = user.Username;
}
return(result);
}
/// <summary>
/// Register a new user
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <ResultFromServer> Registration(User user)
{
var values = new Dictionary <string, string>();
values.Add("Username", user.Username);
values.Add("FName", user.FirstName);
values.Add("LName", user.LastName);
values.Add("Password", user.Password);
//Sending the user data to the server
return(await Server.Connect("SignIn.php", values));
}
/// <summary>
/// Removing the user from the server
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <ResultFromServer> RemoveUserFromServer(User user)
{
if (user.IsAdmin)
{
throw new ArgumentException("Cannot remove administrator user.");
}
var values = new Dictionary <string, string>();
values.Add("Username", user.Username);
return(await Server.Connect("RemoveUser.php", values));
}
/// <summary>
/// Borrow or return the item of the user on the server
/// </summary>
/// <param name="user"></param>
/// <param name="item"></param>
/// <param name="borrow">Borrow or return</param>
/// <returns></returns>
public async Task <ResultFromServer> BorrowReturnServer(User user, AbstractItem item, bool borrow)
{
var values = new Dictionary <string, string>();
values.Add("Guid", item.Guid.ToString());
values.Add("Username", user.Username);
if (borrow)
{
return(await Server.Connect("Borrow.php", values));
}
else
{
return(await Server.Connect("Return.php", values));
}
}
/// <summary>
/// Getting from the server the guids of all items of the user
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public async Task <ResultFromServer> GetUserItemsGuid(User user)
{
var values = new Dictionary <string, string>();
values.Add("Username", user.Username);
var result = await Server.Connect("GetUserItemsGuid.php", values);
if (result == ResultFromServer.Yes)
{
// The retrieved content from the server
string[] words = Server.ResponseWords;
// Adding the guids to user's guids list
for (int i = 0; i < (words.Length - 1); i++)
{
user.MyItems.Add(new Guid(words[i]));
}
return(ResultFromServer.Yes);
}
return(ResultFromServer.ConnectionFailed);
}
/// <summary>
/// Get the items from the server
/// </summary>
/// <returns></returns>
public async Task <ResultFromServer> GetItemsFromServer()
{
var result = await Server.Connect("GetBooks.php");
if (result != ResultFromServer.ConnectionFailed)
{
// The retrieved content from the server
string[] words = Server.ResponseWords;
for (int i = 0; i < (words.Length - 8); i += 8)
{
AbstractItem newItem;
Book.BookCategory bookCategory;
Journal.JournalCategory journalCategory;
//Trying parse the category to book or journal
bool isbook = Enum.TryParse(words[i + 5], out bookCategory);
Enum.TryParse(words[i + 5], out journalCategory);
if (isbook)
{
newItem = new Book(words[i + 0], new Guid(words[i + 3]), bookCategory, words[i + 6]);
}
else
{
newItem = new Journal(words[i + 0], new Guid(words[i + 3]), journalCategory, words[i + 6]);
}
newItem.Date = DateTimeOffset.Parse(words[i + 1], CultureInfo.InvariantCulture);
//Decrypt the url
newItem.CoverImage = Crypt.Decrypt("boris", words[i + 4]);
newItem.CopyNumber = int.Parse(words[i + 2]);
newItem.BorrowedCopies = int.Parse(words[i + 7]);
_items.Add(newItem);
}
return(ResultFromServer.Yes);
}
return(result);
}
