added decouple and EngageDecoupler action

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

@@ -48,6 +48,7 @@ public abstract class Action extends BaseClass {
 			ConditionalAction.class,
 			DelayedAction.class,
 			DetermineTrainInBlock.class,
+			EngageDecoupler.class,
 			FinishRoute.class,
 			Loop.class,
 			PreserveRoute.class,

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

@@ -0,0 +1,84 @@
+package de.srsoftware.web4rail.actions;
+
+import java.util.HashMap;
+import java.util.List;
+
+import org.json.JSONObject;
+
+import de.srsoftware.web4rail.Application;
+import de.srsoftware.web4rail.BaseClass;
+import de.srsoftware.web4rail.Window;
+import de.srsoftware.web4rail.tags.Fieldset;
+import de.srsoftware.web4rail.tiles.Decoupler;
+
+public class EngageDecoupler extends Action {
+	
+	private static final String DECOUPLER = Decoupler.class.getSimpleName();
+
+	public EngageDecoupler(BaseClass parent) {
+		super(parent);
+	}
+
+	private Decoupler decoupler = null;
+
+	@Override
+	public boolean fire(Context context) {
+		if (isNull(decoupler)) return false;
+		decoupler.engage();
+		return true;
+	}
+	
+	@Override
+	public JSONObject json() {
+		JSONObject json = super.json();
+		if (isSet(decoupler)) {
+			json.put(Decoupler.class.getSimpleName(), decoupler.id());
+		}
+		return json;
+	}
+	
+	@Override
+	public Action load(JSONObject json) {
+		super.load(json);
+		if (json.has(DECOUPLER)) {
+			String decouplerId = json.getString(DECOUPLER);
+			decoupler = BaseClass.get(new Id(decouplerId));
+			if (isNull(decoupler)) Application.threadPool.execute(new Thread() { // if relay not loaded, yet: wait one sec and try again
+				public void run() {
+					try {
+						sleep(1000);
+					} catch (InterruptedException e) {}
+					decoupler = BaseClass.get(new Id(decouplerId));
+				};
+			});
+		}
+		return this;
+	}
+	
+	@Override
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+
+		formInputs.add(t("Select decoupler"),Decoupler.selector(decoupler,null));
+		
+		return super.properties(preForm, formInputs, postForm);
+	}
+	
+	@Override
+	protected void removeChild(BaseClass child) {
+		if (child == decoupler) decoupler = null;
+		super.removeChild(child);
+	}
+	
+	public String toString() {
+		if (isNull(decoupler)) return "["+t("Click here to setup decoupler")+"]";
+		return t("Engage {}",decoupler);
+	};
+	
+	@Override
+	protected Object update(HashMap<String, String> params) {
+		LOG.debug("update: {}",params);
+		Id decouplerId = new Id(params.get(DECOUPLER));
+		decoupler = BaseClass.get(decouplerId);
+		return context().properties();
+	}
+}