public HttpResponseMessage AddNote(NoteModel model)
{
try
{
var context = new LibrarySystemContext();
using (context)
{
var book = context.Books.FirstOrDefault(b => b.Key == model.BookKey);
var user = context.Users.FirstOrDefault(u => u.UniqueNumber == model.UserUniqueNumber);
if (book == null)
{
throw new ArgumentException("Няма такава книга!");
}
if (user == null)
{
throw new ArgumentException("Няма такъв потребител!");
}
book.Notes.Add(new Note()
{
User = user,
Text = model.Text
});
context.SaveChanges();
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage PostCreateUser(UserModel model)
{
try
{
var dbContext = new LibrarySystemContext();
using (dbContext)
{
ValidateName(model.Name);
var user = new User()
{
Name = model.Name,
AuthCode = model.AuthCode
};
dbContext.Users.Add(user);
dbContext.SaveChanges();
user.SessionKey = this.GenerateSessionKey(user.Id);
user.UniqueNumber = user.Id + 1000;
dbContext.SaveChanges();
var loggedModel = new LoggedUserModel()
{
UniqueNumber = user.UniqueNumber,
SessionKey = user.SessionKey
};
var response = this.Request.CreateResponse(HttpStatusCode.Created,
loggedModel);
return response;
}
}
catch(Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage PutLogoutUser(string sessionKey)
{
try
{
var context = new LibrarySystemContext();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new ArgumentException("Невалидна сесия.");
}
user.SessionKey = null;
context.SaveChanges();
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest, ex.Message);
return response;
}
}
public HttpResponseMessage PostLoginUser(UserModel model)
{
try
{
ValidateAuthCode(model.AuthCode);
var context = new LibrarySystemContext();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.UniqueNumber == model.UniqueNumber
&& u.AuthCode == model.AuthCode);
if (user == null)
{
throw new InvalidOperationException("Грешна парола или потребителски номер");
}
if (user.SessionKey == null)
{
user.SessionKey = this.GenerateSessionKey(user.Id);
context.SaveChanges();
}
var loggedModel = new LoggedUserModel()
{
UniqueNumber = user.UniqueNumber,
SessionKey = user.SessionKey,
Name = user.Name
};
var response = this.Request.CreateResponse(HttpStatusCode.Created,
loggedModel);
return response;
}
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage DeleteBook(string key)
{
try
{
var context = new LibrarySystemContext();
using(context)
{
var book = context.Books.FirstOrDefault(b => b.Key == key);
if(book==null)
{
throw new ArgumentException("Няма книга с такъв уникален номер!");
}
context.Books.Remove(book);
context.SaveChanges();
}
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
catch(Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage ReturnBook(string bookCode, int userNumber)
{
try
{
var context = new LibrarySystemContext();
using (context)
{
var book = context.Books.FirstOrDefault(b => b.Key == bookCode);
var user = context.Users.FirstOrDefault(u => u.UniqueNumber == userNumber);
if (book == null)
{
throw new ArgumentException("Няма такава книга!");
}
if (user == null)
{
throw new ArgumentException("Няма такъв потребител!");
}
var userBook=context.UsersBooks.FirstOrDefault(ub => ub.Book.Key == book.Key &&
ub.User.UniqueNumber == user.UniqueNumber);
if (userBook != null && userBook.IsReturned==false)
{
userBook.IsReturned = true;
context.SaveChanges();
}
else
{
throw new Exception("Тази книга не е взета от този потребител!");
}
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage ModifyBook(BookModel model, string key)
{
try
{
var context = new LibrarySystemContext();
using (context)
{
var book = context.Books.FirstOrDefault(b => b.Key == key);
if (book == null)
{
throw new ArgumentException("Няма книга с такъв уникален номер!");
}
var author = context.Authors.FirstOrDefault(a => a.Name == model.AuthorName);
if (author == null)
{
context.Authors.Add(new Author()
{
Name = model.AuthorName
});
context.SaveChanges();
}
book.Title = model.Title;
book.Key = model.Key;
book.Author = author;
book.Year = model.Year;
book.Description = model.Description;
context.SaveChanges();
}
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.NotModified,
ex.Message);
return response;
}
}
public HttpResponseMessage ImportBooks(ICollection<BookModel> books)
{
try
{
int errors = 0;
var context = new LibrarySystemContext();
using(context)
{
foreach (var book in books)
{
var author = context.Authors.FirstOrDefault(a => a.Name == book.AuthorName);
if(author==null)
{
author=context.Authors.Add(new Author()
{
Name = book.AuthorName
});
context.SaveChanges();
}
var existBook = context.Books.FirstOrDefault(b => b.Key == book.Key);
if(existBook==null)
{
context.Books.Add(new Book()
{
Title = book.Title,
Author = author,
Key = book.Key,
Year = book.Year,
Description = book.Description
});
}
else
{
errors++;
}
}
context.SaveChanges();
}
if (errors > 0)
{
throw new Exception("Има книга със същото заглавие и тя НЕ е заменена!");
}
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}
public HttpResponseMessage GetBook(string bookCode, int userNumber)
{
try
{
var context = new LibrarySystemContext();
using (context)
{
var book = context.Books.FirstOrDefault(b => b.Key == bookCode);
var user = context.Users.FirstOrDefault(u => u.UniqueNumber == userNumber);
if(book==null)
{
throw new ArgumentException("Няма такава книга!");
}
if(user==null)
{
throw new ArgumentException("Няма такъв потребител!");
}
var userBook = context.UsersBooks.FirstOrDefault(ub => ub.Book.Key == book.Key
&& ub.User.UniqueNumber == user.UniqueNumber);
if (userBook == null)
{
context.UsersBooks.Add(new UserBook()
{
Book = book,
User = user,
IsReturned = false,
DateToReturn = DateTime.Now.AddDays(30)
});
}
else if(userBook.IsReturned==true)
{
userBook.IsReturned = false;
userBook.DateToReturn = DateTime.Now.AddDays(30);
}
else
{
throw new Exception("Тази книга вече е взета!");
}
context.SaveChanges();
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
}
catch (Exception ex)
{
var response = this.Request.CreateResponse(HttpStatusCode.BadRequest,
ex.Message);
return response;
}
}