public void RemoveAt(String author)
{
AuthorLinkedListNode current = front;
AuthorLinkedListNode beforecurrent = front;
while (current.next != null)
{
String currentauthor = current.author;
if (currentauthor.Equals(author))
{
break;
}
beforecurrent = current;
current = current.next;
}
if (current == front)
{
front = front.next;
}
beforecurrent.next = current.next;
}
public ErrorCode Remove(string author, string title)
{
AuthorLinkedListNode authornode = authorList.FindAuthorNode(author);
if (authornode == null)
{
return(ErrorCode.BookNotFound);
}
else
{
if (authorList.FindBookInAuthor(authornode, title))
{
authorList.RemoveBookFromAuthor(authornode, title);
Book.LinkedListNode front = authornode.collection.ReturnFront();
if (front == null) //if an author node have no book node
{
authorList.RemoveAt(author);
}
return(ErrorCode.OK);
}
return(ErrorCode.BookNotFound);
}
}
public bool FindBookInAuthor(AuthorLinkedListNode authornode, String title)
{
Book authorcollection = authornode.collection;
if (authorcollection.Find(title))
{
return(true);
}
return(false);
}
public void print()
{
AuthorLinkedListNode current = front;
while (current != null)
{
Console.WriteLine();
Console.WriteLine("Author: " + current.author);
Book currentcollection = current.collection;
currentcollection.Print();
current = current.next;
}
}
public ErrorCode Add(string author, string title, double price)
{
AuthorLinkedListNode authornode = authorList.FindAuthorNode(author);
if (authornode == null)
{
authornode = authorList.AddSort(author);
return(authorList.AddBookToAuthor(authornode, title, price));
}
return(authorList.AddBookToAuthor(authornode, title, price));
}
public AuthorLinkedListNode FindAuthorNode(String name)
{
AuthorLinkedListNode current = front;
while (current != null)
{
String currentauthor = current.author;
if (currentauthor.Equals(name))
{
return(current);
}
current = current.next;
}
return(null);
}
public AuthorLinkedListNode AddSort(String name)
{
AuthorLinkedListNode current = front;
AuthorLinkedListNode beforecurrent = front;
AuthorLinkedListNode newNode = new AuthorLinkedListNode(name);
if (front == null)
{
front = new AuthorLinkedListNode(name);
return(front);
}
else
{
while (current.next != null && Compare(current.author, name) <= 0)
{
beforecurrent = current;
current = current.next;
}
if (current == front && Compare(current.author, name) >= 0)
{
newNode.next = front;
front = newNode;
return(newNode);
}
if (Compare(current.author, name) >= 0)
{
beforecurrent.next = newNode;
newNode.next = current;
return(newNode);
}
newNode.next = current.next;
current.next = newNode;
return(newNode);
}
}
public void RemoveBookFromAuthor(AuthorLinkedListNode authornode, String title)
{
Book authorcollection = authornode.collection;
authorcollection.RemoveAt(title);
}
public ErrorCode AddBookToAuthor(AuthorLinkedListNode authornode, String title, double price)
{
Book authorcollection = authornode.collection;
return(authorcollection.AddSort(title, price));
}
