Main game loop with Short Range Scan and Shield Control

84 Super Star Trek/csharp/Systems/ShieldControl.cs

@@ -0,0 +1,53 @@
+using SuperStarTrek.Objects;
+using SuperStarTrek.Space;
+
+namespace SuperStarTrek.Systems
+{
+    internal class ShieldControl : Subsystem
+    {
+        private readonly Enterprise _enterprise;
+        private readonly Output _output;
+        private readonly Input _input;
+
+        public ShieldControl(Enterprise enterprise, Output output, Input input)
+            : base("Shield Control", Command.SHE)
+        {
+            _enterprise = enterprise;
+            _output = output;
+            _input = input;
+        }
+
+        public double Energy { get; private set; }
+
+        public override void ExecuteCommand(Quadrant quadrant)
+        {
+            if (Condition < 0)
+            {
+                _output.WriteLine("Shield Control inoperable");
+                return;
+            }
+
+            _output.WriteLine($"Energy available = {_enterprise.TotalEnergy}");
+            var requested = _input.GetNumber($"Number of units to shields");
+
+            if (Validate(requested))
+            {
+                Energy = requested;
+                return;
+            }
+
+            _output.WriteLine("<SHIELDS UNCHANGED>");
+        }
+
+        private bool Validate(double requested)
+        {
+            if (requested > _enterprise.TotalEnergy)
+            {
+                _output.WriteLine("Shield Control reports, 'This is not the Federation Treasury.'");
+                return false;
+            }
+
+            return requested >= 0 && requested != Energy;
+        }
+    }
+}