public void addPath(String pathNameX)
{
/*
* Three Conditions
* First Path == null - No Paths - FirstPath = New Path
* First Path.getNext() == null - One Path - FirstPath.getNext().setNext(New Path)
* First path.getNext() != null - > Two Path - find last and assign
*/
if (firstPath == null)
{
pathNode newPath = new pathNode(pathNameX);
firstPath = newPath;
Console.ForegroundColor = ConsoleColor.DarkGray;
M.debug("New Path Created, assigned to firstPath");
}
else if (firstPath.getNextPath() == null)
{
pathNode newPath = new pathNode(pathNameX, firstPath);
firstPath.setNextpath(newPath); //firstPath.next = newPath
newPath.setPrevpath(firstPath);
M.debug("New path Created, registered as second path created");
}
else
{
PS = firstPath;
while (PS.getNextPath() != null)
{
//Find last path
PS = PS.getNextPath();
}
pathNode newPath = new pathNode(pathNameX);
PS.setNextpath(newPath); //lastPath.next = newPath
newPath.setPrevpath(PS); //newPath.last = lastPath
M.debug("Path created, Unkown path possiton, Prev/Next Path values assigned accordingly");
}
}
public void removePath(pathNode remove)
{
/*
* The getters for pathNodes are not build to not return null, meaning if you try and call a method like
* remove.getNext().setNext(null) but remove.getNext() is null it will hard error
*/
if (remove == firstPath) //If the path to remove is the first path, you simple need to re-assign first path.
{
if (remove.getNextPath() == null) //Program will error out w/o these error checks
{
firstPath = null;
}
else
{
firstPath = remove.getNextPath();
firstPath.setPrevpath(null);
}
}
else if (remove == firstPath.getNextPath())
/*
* This is a simi-redundent case
* This could be handled with the else statment
* however I like handling this case seperatly I don't know why
* Anyt thing I mess with anything to do with firstPath, I like to call it Directly
*/
{
if (remove.getNextPath() == null)
{
firstPath.setNextpath(null);
remove.setPrevpath(null); //This is a redudent clean up that I like to do, it is not necissary
}
else
{
firstPath.setNextpath(remove.getNextPath());
remove.getNextPath().setPrevpath(firstPath);
remove.setNextpath(null);
remove.setPrevpath(null);
}
}
else
{
if (remove.getNextPath() == null)
{
remove.getPrevPath().setNextpath(null);
remove.setNextpath(null);
}
else
{
remove.getPrevPath().setNextpath(remove.getNextPath());
remove.getNextPath().setPrevpath(remove.getPrevPath());
remove.setNextpath(null);
remove.setPrevpath(null);
}
}
}