/// <summary>
/// Searches East for a given word on a given board starting at a given origin point. If it finds the word,
/// it returns a list of all of the coordinates that make up the word. Otherwise, it returns null
/// </summary>
/// <param name="board">WordSearchBoard to search on</param>
/// <param name="origin">Coordinate point to begin searching</param>
/// <param name="word">Word to search for</param>
/// <returns>If it finds the word, returns a list of all of the coordinates that make up the word. Otherwise, it returns null</returns>
public List <Coordinate> CheckEast(WordSearchBoard board, Coordinate origin, string word)
{
_output = new List <Coordinate>();
Coordinate tempCoordinate = new Coordinate(origin.X, origin.Y);
foreach (char letter in word)
{
try
{
if (board.GetCharAt(tempCoordinate) == letter)
{
_output.Add(tempCoordinate);
tempCoordinate = new Coordinate(tempCoordinate.X + 1, tempCoordinate.Y);
}
else
{
return(null);
}
}
catch (ArgumentException)
{
//ArgumentException here means that the tempCoordinate is pointed to an invalid coordinate off the board
//Return null because we know words cannot wrap around to another part of the board
return(null);
}
}
return(_output);
}
/// <summary>
/// Searches North-West for a given word on a given board starting at a given origin point. If it finds the word,
/// it returns a list of all of the coordinates that make up the word. Otherwise, it returns null
/// </summary>
/// <param name="board">WordSearchBoard to search on</param>
/// <param name="origin">Coordinate point to begin searching</param>
/// <param name="word">Word to search for</param>
/// <returns>If it finds the word, returns a list of all of the coordinates that make up the word. Otherwise, it returns null</returns>
public List <Coordinate> CheckNorthWest(WordSearchBoard board, Coordinate origin, string word)
{
_output = new List <Coordinate>();
Coordinate tempCoordinate = new Coordinate(origin.X, origin.Y);
foreach (char letter in word)
{
try
{
if (board.GetCharAt(tempCoordinate) == letter)
{
_output.Add(tempCoordinate);
tempCoordinate = new Coordinate(tempCoordinate.X - 1, tempCoordinate.Y - 1);
}
else
{
return(null);
}
}
catch (ArgumentException)
{
//ArgumentException here means that the tempCoordinate is pointed to an invalid coordinate off the board
return(null);
}
}
return(_output);
}
public void TestWithInvalidY()
{
List <string> lines = new List <string>();
lines.Add("A,B,C");
lines.Add("D,E,F");
lines.Add("G,H,I");
_board = new WordSearchBoard(lines);
_board.GetCharAt(0, 3);
}
public void TestWithNegativeX()
{
List <string> lines = new List <string>();
lines.Add("A,B,C");
lines.Add("D,E,F");
lines.Add("G,H,I");
_board = new WordSearchBoard(lines);
_board.GetCharAt(-1, 0);
}
public void TestWithNegativeY()
{
List <string> lines = new List <string>();
lines.Add("A,B,C");
lines.Add("D,E,F");
lines.Add("G,H,I");
_board = new WordSearchBoard(lines);
_board.GetCharAt(new Coordinate(0, -1));
}
public void TestWithValidXY()
{
List <string> lines = new List <string>();
lines.Add("A,B,C");
lines.Add("D,E,F");
lines.Add("G,H,I");
_board = new WordSearchBoard(lines);
Assert.AreEqual('A', _board.GetCharAt(0, 0));
Assert.AreEqual('B', _board.GetCharAt(1, 0));
Assert.AreEqual('C', _board.GetCharAt(2, 0));
Assert.AreEqual('D', _board.GetCharAt(0, 1));
Assert.AreEqual('E', _board.GetCharAt(1, 1));
Assert.AreEqual('F', _board.GetCharAt(2, 1));
Assert.AreEqual('G', _board.GetCharAt(0, 2));
Assert.AreEqual('H', _board.GetCharAt(1, 2));
Assert.AreEqual('I', _board.GetCharAt(2, 2));
}
/// <summary>
/// Returns a list of coordinates that contain the character letter
/// </summary>
/// <param name="letter">The character that we are searching the board for</param>
/// <returns>Returns a list of coordinates that contain the character letter</returns>
private List<Coordinate> GetCoordinatesContainingChar(char letter)
{
List<Coordinate> output = new List<Coordinate>();
for (int y = 0; y < _board.GetLength(); y++)
{
for (int x = 0; x < _board.GetLength(); x++)
{
if (_board.GetCharAt(x, y) == letter)
{
output.Add(new Coordinate(x,y));
}
}
}
return output;
}
