implemented pre-reservation of routes when autopilot is active

src/main/java/de/srsoftware/web4rail/actions/Action.java

@@ -40,7 +40,7 @@ public abstract class Action extends BaseClass {
 		public Block block = null;
 		public Direction direction = null;
 		
-		private Context(Contact c, Route r, Train t, Block b, Direction d) {
+		public Context(Contact c, Route r, Train t, Block b, Direction d) {
 			contact = c;
 			route = r;
 			train = t;
@@ -138,6 +138,7 @@ public abstract class Action extends BaseClass {
 			DelayedAction.class,
 			DetermineTrainInBlock.class,
 			FinishRoute.class,
+			PreserveRoute.class,
 			SendCommand.class,
 			SetDisplayText.class,
 			SetPower.class,

src/main/java/de/srsoftware/web4rail/actions/PreserveRoute.java

@@ -0,0 +1,28 @@
+package de.srsoftware.web4rail.actions;
+
+import de.srsoftware.web4rail.Range;
+import de.srsoftware.web4rail.Route;
+import de.srsoftware.web4rail.moving.Train;
+
+public class PreserveRoute extends Action {
+
+	@Override
+	public boolean fire(Context context) {
+		Train train = context.train;
+		Route route = context.route;
+		// These are errors:
+		if (isNull(train)) return false; 
+		if (isNull(route)) return false;
+		
+		Range waitTime = context.route.endBlock().getWaitTime(context.train,context.route.endDirection);
+
+		// These are NOT errors:
+		if (!context.train.usesAutopilot()) return true;
+		if (waitTime.max > 0) return true; // train is expected to wait in next block.
+		if (train.destination() == route.endBlock()) return true;
+
+		context.train.reserveNext();
+		return true;
+	}
+
+}