/// <summary>
/// Initializes a new instance of the <see cref="Minefield"/> class.
/// </summary>
/// <param name="rows">Number of rows.</param>
/// <param name="cols">Number of columns.</param>
/// <param name="numberOfMines">Number of mines.</param>
/// <param name="rndGenerator">Random generator provider.</param>
public Minefield(int rows, int cols, int numberOfMines, IRandomGeneratorProvider rndGenerator)
{
// Validations
this.RowsCount = rows;
this.ColumnsCount = cols;
this.NumberOfMines = numberOfMines;
this.RandomGenerator = rndGenerator;
// Initializations
this.OpenedCellsCount = 0;
this.Cells = this.GenerateMinefield(rows * cols, numberOfMines);
this.allNeighborMines = this.CalculateNeighborMines();
}
/// <summary>
/// Handles shuffling of an IEnumerable of T with Fisher-Yates shuffle algorithm with given random generator.
/// </summary>
/// <typeparam name="T">Generic type.</typeparam>
/// <param name="source">IEnumerable of T to be shuffled randomly.</param>
/// <param name="randomGenerator">IRandomGeneratorProvider for testable random numbers.</param>
/// <returns>Shuffled IEnumerable.</returns>
public static IEnumerable <T> Shuffle <T>(this IEnumerable <T> source, IRandomGeneratorProvider randomGenerator)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (randomGenerator == null)
{
throw new ArgumentNullException("rng");
}
return(source.ShuffleIterator(randomGenerator));
}
/// <summary>
/// Returns shuffled IEnumerable of T with Fisher-Yates shuffle algorithm with given random generator.
/// </summary>
/// <typeparam name="T">Generic type.</typeparam>
/// <param name="source">IEnumerable to be shuffled.</param>
/// <param name="randomGenerator">Provider of random generator of type IRandomGeneratorProvider.</param>
/// <returns>Shuffled IEnumerable.</returns>
private static IEnumerable <T> ShuffleIterator <T>(this IEnumerable <T> source, IRandomGeneratorProvider randomGenerator)
{
T[] elements = source.ToArray();
for (int i = elements.Length - 1; i > 0; i--)
{
int swapIndex = randomGenerator.Next(i + 1);
yield return(elements[swapIndex]);
elements[swapIndex] = elements[i];
}
yield return(elements[0]);
}
/// <summary>
/// Initializes a new instance of the <see cref="MinefieldEasy"/> class.
/// </summary>
/// <param name="rows">Number of rows.</param>
/// <param name="cols">Number of columns.</param>
/// <param name="numberOfMines">Number of mines.</param>
/// <param name="rndGenerator">Random generator provider.</param>
public MinefieldEasy(int rows, int cols, int numberOfMines, IRandomGeneratorProvider rndGenerator) : base(rows, cols, numberOfMines, rndGenerator)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="MinefieldEasy"/> class.
/// </summary>
/// <param name="rows">Number of rows.</param>
/// <param name="cols">Number of columns.</param>
/// <param name="numberOfMines">Number of mines.</param>
/// <param name="rndGenerator">Random generator provider.</param>
public MinefieldEasy(int rows, int cols, int numberOfMines, IRandomGeneratorProvider rndGenerator) : base(rows, cols, numberOfMines, rndGenerator)
{
}
