fixed actions boken by function mapping implementation

src/main/java/de/srsoftware/web4rail/functions/CustomFunction.java

@@ -1,5 +1,49 @@
 package de.srsoftware.web4rail.functions;
 
-public class CustomFunction extends Function {
+import org.json.JSONObject;
 
+import de.srsoftware.web4rail.Params;
+import de.srsoftware.web4rail.devices.Decoder;
+import de.srsoftware.web4rail.tags.Fieldset;
+import de.srsoftware.web4rail.tags.Input;
+import de.srsoftware.web4rail.tags.Label;
+
+public class CustomFunction extends Function {
+	private String customName = super.name();
+	
+	@Override
+	public Fieldset form(Decoder decoder) {
+		Fieldset fieldset = super.form(decoder);
+		String prefix = "functions/"+id()+"/";
+		new Input(prefix+NAME, customName)
+			.addTo(new Label(t("Name")))
+			.addTo(fieldset);
+		return fieldset;
+	}
+	
+	@Override
+	public JSONObject json() {
+		JSONObject json = super.json();
+		json.put(NAME, customName);
+		return json;
+	}
+	
+	@Override
+	public CustomFunction load(JSONObject json) {
+		super.load(json);
+		if (json.has(NAME)) customName = json.getString(NAME);
+		return this;
+	}
+	
+	@Override
+	public String name() {
+		return customName;
+	}
+	
+	@Override
+	public Object update(Params params) {
+		String newName = params.getString(NAME);
+		if (isSet(newName) && !newName.isEmpty()) customName = newName;
+		return super.update(params);
+	}
 }