public bool AddWord(string word)
{
string[] wordArray = word.Select(x => x.ToString()).ToArray();
if (IsEmpty())
{
AddFirstWord(wordArray);
return(true);
}
int row = 0;
bool matchFound = false;
do
{
for (int col = 0; col < RowSize; col++)
{
InsertWordResult insertWordResult = AttemptToAddWordVertically(wordArray, row, col);
matchFound = insertWordResult.Inserted;
if (matchFound)
{
break;
}
}
row += 1;
} while (row + wordArray.Length <= RowSize && matchFound == false);
return(matchFound);
}
private InsertWordResult CanWordBeAddedVerticallyToRow(int wordLength, int row, int currentCol, string[] word)
{
bool letterMatch = false;
bool letterMismatch = false;
int currentRow = row;
for (int i = 0; i < wordLength; i++)
{
if (Grids[currentRow, currentCol] == word[i])
{
letterMatch = true;
}
else if (Grids[currentRow, currentCol] != word[i] &&
string.IsNullOrEmpty(Grids[currentRow, currentCol]) == false)
{
//The cell is not empty and there is a mismatch in the cell for the letter and
letterMismatch = true;
break;
}
currentRow += 1;
}
var insertResult = new InsertWordResult
{
Inserted = letterMatch && !letterMismatch,
StartCell = Tuple.Create(row, currentCol),
EndCell = Tuple.Create(currentRow, currentCol),
Word = word.ToString()
};
insertResult.Inserted = ValidateSuffixRule(insertResult);
return(insertResult);
}
private bool ValidateSuffixRule(InsertWordResult insertWordResult)
{
if (!insertWordResult.Inserted)
{
return(false);
}
int nextrow = insertWordResult.EndCell.Item1;
int col = insertWordResult.EndCell.Item2;
return(string.IsNullOrEmpty(Grids[nextrow, col]));
}
private InsertWordResult AttemptToAddWordVertically(string[] word, int currentRow, int col)
{
int wordLength = word.Length;
//Add only if first cell has been prepopulated with first word;
if (string.IsNullOrEmpty(Grids[currentRow, col]))
{
return(new InsertWordResult());
}
InsertWordResult wordInsertedResult = CanWordBeAddedVerticallyToRow(wordLength, currentRow, col, word);
if (wordInsertedResult.Inserted)
{
AddWordVerticallyToRow(wordLength, currentRow, col, word);
//InsertWordResults.Add(wordInsertedResult);
}
return(wordInsertedResult);
}
