Simplify DepthCharge (C#) folder structure

31_Depth_Charge/csharp/Controller.cs

@@ -0,0 +1,85 @@
+using System;
+
+namespace DepthCharge
+{
+    /// <summary>
+    /// Contains functions for reading input from the user.
+    /// </summary>
+    static class Controller
+    {
+        /// <summary>
+        /// Retrives a dimension for the play area from the user.
+        /// </summary>
+        /// <remarks>
+        /// Note that the original BASIC version would allow dimension values
+        /// of 0 or less.  We're doing a little extra validation here in order
+        /// to avoid strange behaviour.
+        /// </remarks>
+        public static int InputDimension()
+        {
+            View.PromptDimension();
+
+            while (true)
+            {
+                if (!Int32.TryParse(Console.ReadLine(), out var dimension))
+                    View.ShowInvalidNumber();
+                else
+                if (dimension < 1)
+                    View.ShowInvalidDimension();
+                else
+                    return dimension;
+            }
+        }
+
+        /// <summary>
+        /// Retrieves a set of coordinates from the user.
+        /// </summary>
+        /// <param name="trailNumber">
+        /// The current trail number.
+        /// </param>
+        public static (int x, int y, int depth) InputCoordinates(int trailNumber)
+        {
+            View.PromptGuess(trailNumber);
+
+            while (true)
+            {
+                var coordinates = Console.ReadLine().Split(',');
+
+                if (coordinates.Length < 3)
+                    View.ShowTooFewCoordinates();
+                else
+                if (coordinates.Length > 3)
+                    View.ShowTooManyCoordinates();
+                else
+                if (!Int32.TryParse(coordinates[0], out var x) ||
+                    !Int32.TryParse(coordinates[1], out var y) ||
+                    !Int32.TryParse(coordinates[2], out var depth))
+                    View.ShowInvalidNumber();
+                else
+                    return (x, y, depth);
+            }
+        }
+
+        /// <summary>
+        /// Retrieves the user's intention to play again (or not).
+        /// </summary>
+        public static bool InputPlayAgain()
+        {
+            View.PromptPlayAgain();
+
+            while (true)
+            {
+                switch (Console.ReadLine())
+                {
+                    case "Y":
+                        return true;
+                    case "N":
+                        return false;
+                    default:
+                        View.ShowInvalidYesOrNo();
+                        break;
+                }
+            }
+        }
+    }
+}