Initial commit

Numbers/NumberFactory/AbstractNumbers.cs

@@ -0,0 +1,56 @@
+using System.Collections;
+
+namespace Numbers.NumberFactory;
+
+/// <summary>
+///     Base class for <see cref="INumbers" /> implementations
+/// </summary>
+/// <inheritdoc cref="INumbers" />
+public abstract class AbstractNumbers : INumbers
+{
+    // TODO
+    // private readonly List<long> _list;
+
+    /// <summary>
+    ///     Creates a new instance of <see cref="AbstractNumbers" /> with the given bounds.
+    ///     Will generate the appropriate numbers based on the implementation of <see cref="PickNumber" />.
+    /// </summary>
+    /// <param name="lowerBound">Lower bound of the number range</param>
+    /// <param name="upperBound">Upper bound of the number range</param>
+    protected AbstractNumbers(long lowerBound, long upperBound)
+    {
+        // TODO
+    }
+
+    public long this[int index]
+    {
+        get
+        {
+            // TODO
+            return -1L;
+        }
+    }
+
+    public long LowerBound { get; }
+
+    public long UpperBound { get; }
+
+    public int Length => -1; // TODO
+
+    public IEnumerator<long> GetEnumerator() => null!; // TODO
+
+    IEnumerator IEnumerable.GetEnumerator() => null!; // TODO
+
+    private void GenerateNumbers()
+    {
+        // TODO
+    }
+
+    /// <summary>
+    ///     Determines whether the given number should be picked based on the task of a
+    ///     specific <see cref="INumbers" /> implementation
+    /// </summary>
+    /// <param name="number">Number to check</param>
+    /// <returns>True if the number should be picked; false otherwise</returns>
+    protected abstract bool PickNumber(long number);
+}