1 files changed, 38 insertions, 0 deletions
diff --git a/V3/AI/Internal/AbstractAction.cs b/V3/AI/Internal/AbstractAction.cs
new file mode 100644
index 0000000..1b5f73e
--- /dev/null
+++ b/V3/AI/Internal/AbstractAction.cs
@@ -0,0 +1,38 @@
+namespace V3.AI.Internal
+{
+    /// <summary>
+    /// Abstract implementation of IAction.
+    /// </summary>
+    public abstract class AbstractAction : IAction
+    {
+        /// <summary>
+        /// The current state of the action.
+        /// </summary>
+        public ActionState State { get; private set; } = ActionState.Waiting;
+
+        /// <summary>
+        /// Start the execution of the action.
+        /// </summary>
+        public virtual void Start()
+        {
+            State = ActionState.Executing;
+        }
+
+        /// <summary>
+        /// Update the execution state.  This method should be repateatingly
+        /// called as long as State is Executing.
+        /// </summary>
+        public virtual void Update()
+        {
+            if (State != ActionState.Executing)
+                return;
+            State = GetNextState();
+        }
+
+        /// <summary>
+        /// Returns the next state of this action.  It is guaranteed that the
+        /// current state is Executing.
+        /// </summary>
+        protected abstract ActionState GetNextState();
+    }
+}