// Read all bytes from stream as book item
private Book ReadFromStream(BinaryReader binaryReader)
{
if (binaryReader != null)
{
int id = binaryReader.ReadInt32();
string isbn = binaryReader.ReadString();
string author = binaryReader.ReadString();
string name = binaryReader.ReadString();
string publisher = binaryReader.ReadString();
int year = binaryReader.ReadInt32();
int numberOfPages = binaryReader.ReadInt32();
decimal price = binaryReader.ReadDecimal();
return(new Book
{
Id = id,
ISBN = isbn,
Author = author,
Name = name,
Publisher = publisher,
Year = year,
NumberOfPages = numberOfPages,
Price = price
});
}
else
{
MyLogger.GetLogger().Info("Argument Null Exception!");
throw new ArgumentNullException();
}
}
/// <summary>
/// Update(edit) a book
/// </summary>
/// <param name="book"> Book to update </param>
public void Update(Book book)
{
if (book != null)
{
var results = new List <ValidationResult>();
var context = new ValidationContext(book);
if (!Validator.TryValidateObject(book, context, results, true))
{
foreach (var error in results)
{
MyLogger.GetLogger().Info(error.ErrorMessage);
}
}
else
{
Book b = GetById(book.Id);
if (b != null)
{
b.ISBN = book.ISBN;
b.Author = book.Author;
b.Name = book.Name;
b.Publisher = book.Publisher;
b.Year = book.Year;
b.NumberOfPages = book.NumberOfPages;
b.Price = book.Price;
_bookStorage.Save();
}
}
}
}
/// <summary>
/// Add new book into BookStorage
/// </summary>
/// <param name="book"> Book to add </param>
public void Add(Book book)
{
if (book != null)
{
var results = new List <ValidationResult>();
var context = new ValidationContext(book);
if (!Validator.TryValidateObject(book, context, results, true))
{
foreach (var error in results)
{
MyLogger.GetLogger().Info(error.ErrorMessage);
}
}
else
{
if (!_books.Contains(book))
{
int id = _books.Max(b => b.Id) + 1;
book.Id = id;
_books.Add(book);
_bookStorage.Save();
}
else
{
MyLogger.GetLogger().Info("Duplicated book!");
throw new ArgumentException("Duplicated book!");
}
}
}
}
/// <summary>
/// Load from binary file
/// </summary>
/// <returns> Collection of books </returns>
public IEnumerable <Book> Load()
{
if (File.Exists(_fullPath))
{
_storage.Clear();
using (FileStream stream = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (BinaryReader binaryReader = new BinaryReader(stream))
{
binaryReader.BaseStream.Seek(0, SeekOrigin.Begin);
//// Read each value while not EOF
while (binaryReader.PeekChar() != -1) // for FileStream binaryReader.PeekChar() != -1 for MemoryStream binaryReader.PeekChar() != 0
{
_storage.Add(ReadFromStream(binaryReader));
}
}
}
MyLogger.GetLogger().Info("Binary file was successfully loaded!");
return(_storage);
}
else
{
MyLogger.GetLogger().Info("Binary file Not Found!");
throw new FileNotFoundException();
}
}
/// <summary>
/// Get a book by Id
/// </summary>
/// <param name="id"> Id </param>
/// <returns> Book from BookStorage </returns>
public Book GetById(int id)
{
Book book = _books.Where(b => b.Id.Equals(id)).FirstOrDefault();
if (book == null)
{
MyLogger.GetLogger().Info("There is no such book in the BookStorage!");
throw new NullReferenceException("There is no such book in the BookStorage!");
}
return(book);
}
/// <summary>
/// Remove a book with a given id from BookStorage
/// </summary>
/// <param name="id"> Id </param>
public void Remove(int id)
{
Book book = GetById(id);
if (book != null)
{
_books.Remove(book);
_bookStorage.Save();
}
else
{
MyLogger.GetLogger().Info("There is no such book in the BookStorage!");
throw new ArgumentException("There is no such book in the BookStorage!");
}
}
/// <summary>
/// Save to binary file
/// </summary>
public void Save()
{
using (FileStream stream = new FileStream(_fullPath, FileMode.Create, FileAccess.Write, FileShare.ReadWrite))
{
using (BinaryWriter binaryWriter = new BinaryWriter(stream))
{
foreach (var item in _storage)
{
WriteToStream(binaryWriter, item);
}
}
}
MyLogger.GetLogger().Info("Binary file was successfully saved!");
}
// Write book as array of bytes to stream
private void WriteToStream(BinaryWriter binaryWriter, Book book)
{
if (book != null && binaryWriter != null)
{
binaryWriter.Write(book.Id);
binaryWriter.Write(book.ISBN);
binaryWriter.Write(book.Author);
binaryWriter.Write(book.Name);
binaryWriter.Write(book.Publisher);
binaryWriter.Write(book.Year);
binaryWriter.Write(book.NumberOfPages);
binaryWriter.Write(book.Price);
}
else
{
MyLogger.GetLogger().Info("Argument Null Exception!");
throw new ArgumentNullException();
}
}
/// <summary>
/// Parse a collection of url
/// </summary>
public IEnumerable <UrlAddress> Parse()
{
foreach (var item in _uris)
{
if (!_validator.IsValid(item))
{
MyLogger.GetLogger().Info($"Invalid Url: {item}");
continue;
}
Uri uri = new Uri(item);
_urlAddresses.Add(new UrlAddress
{
Scheme = uri.Scheme,
Host = uri.Host,
Segments = uri.Segments.Where(s => s != "/").Select(x => x.TrimEnd('/')).ToArray(),
Parameters = HttpUtility.ParseQueryString(uri.Query).ToDictionary()
});
}
return(_urlAddresses);
}