// if during checkers game any chosen position == an existing checker position throw exception otherwise valid
//throw and exception if not diagonal
public Checker CheckerPreCheck(int sourceRow, int sourceColumn, int destRow, int destColumn, Checker check)
{
check = Checkers.Find(cx => cx.Position.SequenceEqual(new List <int> {
sourceRow, sourceColumn
}));
// if dest row and dest col have a checker piece using select checker method passing dest
if (SelectCheckerDestination(destRow, destColumn) != null)
{
throw new Exception("That space is full.");
}
else if (SelectCheckerDestination(destRow, destColumn) == null)
{
//if moving 2 diagonal spaces jump checker must be opposing (X)
//1. check if moving two spots (X)
//2. check if destination removal is not null (&& SelectCheckerDestination(destRow+1,destColumn -1) != null)
//3. checker symbol being jumped is opposing
if (Math.Abs(destRow - check.Position[0]) == 2 && Math.Abs(destColumn - check.Position[1]) == 2)
{
if (destRow - check.Position[0] == -2 && destColumn - check.Position[1] == 2)
{
RemoveChecker(destRow + 1, destColumn - 1);
Console.WriteLine("Nice move");
}
//remove the checker row up to column left
else if (destRow - check.Position[0] == -2 && destColumn - check.Position[1] == -2)
{
RemoveChecker(destRow + 1, destColumn + 1);
Console.WriteLine("Nice move");
}
//remove the checker row behind me to column right
else if (destRow - check.Position[0] == 2 && destColumn - check.Position[1] == 2)
{
RemoveChecker(destRow - 1, destColumn - 1);
Console.WriteLine("Nice move");
}
//remove the checker down to left
else if (destRow - check.Position[0] == 2 && destColumn - check.Position[1] == -2)
{
RemoveChecker(destRow - 1, destColumn + 1);
Console.WriteLine("Nice move");
}
//check for a diagonal move - regular
}
else if (Math.Abs(destRow - check.Position[0]) == 1 &&
Math.Abs(destColumn - check.Position[1]) == 1)
{
Console.WriteLine("Nice diagonal move!");
return(Checkers.Find(cx => cx.Position.SequenceEqual(new List <int> {
destRow, destColumn
})));
}
else
{
Console.WriteLine(" ");
throw new Exception("You cannot move here. Does not meet requirements to move.");
}
}
return(Checkers.Find(cx => cx.Position.SequenceEqual(new List <int> {
destRow, destColumn
})));
}
//allows a checker to be removed
public void RemoveChecker(int destRow, int destColumn)
{
Checker cx2 = SelectCheckerDestination(destRow, destColumn);
Checkers.Remove(cx2);
}
public void RemoveChecker(Checker checker)
{
Checkers.Remove(checker);
return;
}