//The function printAll goes through
//the list and prints off each book Record.
public void printAll()
{
if (m_pHead == null) //Checks if there is anything in the list, prints message if list is empty
{
Console.Error.WriteLine("Nothing to print.There are no contents in this list!");
return;
}
BookRecord temp = new BookRecord();
temp = m_pHead;
while (temp != null)//The while loop runs through the list until it ends
{
temp.printRecord();
temp = temp.getNext();
}
}
//The function getNumberInStock searches
//for a specific book by its stock number.
//If the book is found, its information is printed.
public int getNumberInStock(long sn)
{
if (m_pHead == null) //Checks if there is anything in the list, prints message if list is empty
{
Console.Error.WriteLine("There are no contents in this list!");
}
BookRecord temp = new BookRecord();
temp = m_pHead;
//The function searches the list until it ends or the matching stock number is found
while ((temp != null) && (sn != temp.getStockNum()))
{
temp = temp.getNext();
}
if (temp == null) //If the match isn't found, return 0
{
return 0;
}
else //If there is a match, the number in stock is printed
{
return temp.getNumberInStock();
}
}
//The function searchByCost searches
//for each book that falls within the given
//price range.
public void searchByCost(double min, double max)
{
BookRecord temp = new BookRecord();
temp = m_pHead;
int tracker = 0; //Tracks every book found
if (m_pHead == null) //Checks if there is anything in the list, prints message if list is empty
{
Console.Error.WriteLine("There are no contents in this list!");
}
while ((temp != null)) //The list is searched till end
{
//Checks to see if the cost of the book falls within the range (min & max)
if ((temp.getCost() >= min) && (temp.getCost() <= max))
{
temp.printRecord(); //If it does, the information is printed.
tracker++;
}
temp = temp.getNext();
}
if (tracker <= 0) //If no book is found in that price range
{
Console.WriteLine("No item(s) found for this price range!");
}
}
//The function searchByClassification searches
//for a book by the given classification number
//and prints the information.
public void searchByClassification(int cl)
{
if (m_pHead == null) //Checks if there is anything in the list, prints message if list is empty
{
Console.Error.WriteLine("There are no contents in this list!");
return;
}
BookRecord temp = new BookRecord();
int tempCL;
int tracker = 0; //Tracks every book found
temp = m_pHead;
tempCL = temp.getClassification();
//This for loop searches the list until it ends
while (temp != null)
{
tempCL = temp.getClassification();
if(tempCL == cl)//if the classification numbers match,
{
temp.printRecord(); //the information is printed
tracker++;
}
temp = temp.getNext(); // iterate
}
if (tracker <= 0)
{
Console.WriteLine("No item(s) with that classification number!");
}
}
//The function searchByStockNumber searches the list for books
//with the given stock number and prints their information.
public BookRecord searchByStockNumber(long stockNum)
{
if (m_pHead == null)//Checks if there is anything in the list, prints message if list is empty
{
Console.Error.WriteLine("There are no contents in this list!");
}
BookRecord temp = new BookRecord();
Boolean isFound = false;
temp = m_pHead;
//The function searches the list until it reaches the end
while (temp != null)
{
if (stockNum == temp.getStockNum()) //The book information is printed if it's found
{
isFound = true;
return temp;
}
temp = temp.getNext(); //Iterate
}
if (isFound == false) //If the target is not found, return null
{
return null;
}
//Function won't ever get here, this is to stop the warning that "not all control paths return a value"
return null;
}
//The function removeBook searches for the stock number
//of a Book Record and removes that book from the list.
public Boolean removeBook(long stockNum)
{
BookRecord temp = new BookRecord();
BookRecord back = new BookRecord();
if (m_pHead == null) //CHecks if there is anything in the list
{
return false;
}
temp = m_pHead;
back = null;
while((temp != null) && (stockNum != temp.getStockNum())) //The function moves down the list
{
back = temp;
temp = temp.getNext();
}
//If the list has reached the end and no book is found, a message is printed
if(temp == null)
{
Console.WriteLine("Book not Found.");
return false;
}
else if (back == null) //If the book is at the head, head points to the next node and the book is removed
{
m_pHead = m_pHead.getNext();
temp = null;
}
else //If the book is not at the head, the node before the target is set to the node after the target
{
back.setNext(temp.getNext());
temp = null; //he target is deleted.
}
return true;
}
