Partly resolves "Implement state copy in AST"

eraser-base/src/main/jastadd/Item.jrag

 aspect ItemHandling {
 
-  protected boolean Item.isFrozen = false;
-  public void Item.freeze() { isFrozen = true; }
-  public void Item.unfreeze() { isFrozen = false; }
-  public final boolean Item.isFrozen() { return isFrozen; }
-
   protected boolean Item.sendState = true;
   public void Item.disableSendState() { sendState = false; }
   public void Item.enableSendState() { sendState = true; }
@@ -254,31 +249,31 @@ aspect ItemHandling {
 
   //--- setState(value,shouldSendState) ---
   public void ItemWithBooleanState.setState(boolean value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ItemWithStringState.setState(String value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ItemWithDoubleState.setState(double value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void ColorItem.setState(TupleHSB value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
 
   public void DateTimeItem.setState(Instant value, boolean shouldSendState) {
-    if (isFrozen || stateEquals(value)) { return; }
+    if (stateEquals(value)) { return; }
     set_state(value);
     stateUpdated(shouldSendState);
   }
@@ -290,7 +285,6 @@ aspect ItemHandling {
    *   <li>Send the new state via MQTT</li>
    *   <li>Send the new state to Influx DB</li>
    *   <li>Notify the attached {@link ItemObserver}, if any</li>
-   *   <li>Update state of controlled items</li>
    * </ul>
    * @param shouldSendState whether to send the new state (currently affects MQTT and Influx)
    */
@@ -306,9 +300,6 @@ aspect ItemHandling {
     if (hasItemObserver()) {
       getItemObserver().apply();
     }
-    for (Item controlled : getControllingList()) {
-      doUpdateFor(controlled);
-    }
   }
 
   //--- sendState ---
@@ -388,22 +379,50 @@ aspect ItemHandling {
   syn DateTimeItem Item.asDateTimeItem() = (DateTimeItem) this;
   syn DateTimeItem DateTimeItem.asDateTimeItem() = this;
 
-  //--- doUpdateFor ---
-  protected abstract void Item.doUpdateFor(Item controlling);
-  protected void ItemWithBooleanState.doUpdateFor(Item controlling) {
-    controlling.setStateFromBoolean(this.getState());
+
+  //--- State Copy ---
+  public void Item.addControlling(Item controlledItem) { 
+    getRoot().addRule(createControllerRule(this,controlledItem));
   }
-  protected void ItemWithStringState.doUpdateFor(Item controlling) {
-    controlling.setStateFromString(this.getState());
+
+  public void Item.addControlledBy(Item controllerItem) { 
+    getRoot().addRule(createControllerRule(controllerItem,this));
   }
-  protected void ItemWithDoubleState.doUpdateFor(Item controlling) {
-    controlling.setStateFromDouble(this.getState());
+
+  
+  private Rule Item.createControllerRule(Item controllerItem, Item controlledItem) {
+    Rule rule = new Rule();
+
+    ItemStateChangeCondition condition = new ItemStateChangeCondition();
+    condition.setItem(controllerItem);
+    rule.addCondition(condition);
+
+    SetStateFromTriggeringItemAction action = new SetStateFromTriggeringItemAction();
+    action.setAffectedItem(controlledItem);
+    rule.addAction(action);
+    rule.activateFor(controllerItem);
+    
+    return rule;
+    
   }
-  protected void ColorItem.doUpdateFor(Item controlling) {
-    controlling.setStateFromColor(this.getState());
+  
+
+  //--- copyStateTo ---
+  protected abstract void Item.copyStateTo(Item stateReceiver);
+  protected void ItemWithBooleanState.copyStateTo(Item stateReceiver) {
+    stateReceiver.setStateFromBoolean(this.getState());
+  }
+  protected void ItemWithStringState.copyStateTo(Item stateReceiver) {
+    stateReceiver.setStateFromString(this.getState());
+  }
+  protected void ItemWithDoubleState.copyStateTo(Item stateReceiver) {
+    stateReceiver.setStateFromDouble(this.getState());
   }
-  protected void DateTimeItem.doUpdateFor(Item controlling) {
-    controlling.setStateFromInstant(this.getState());
+  protected void ColorItem.copyStateTo(Item stateReceiver) {
+    stateReceiver.setStateFromColor(this.getState());
+  }
+  protected void DateTimeItem.copyStateTo(Item stateReceiver) {
+    stateReceiver.setStateFromInstant(this.getState());
   }
 
   private void ColorItem.setBrightness(int value) {
@@ -414,20 +433,10 @@ aspect ItemHandling {
   public abstract void ItemUpdate.apply();
   public void ItemUpdateColor.apply() {
     getItem().setStateFromColor(getNewHSB());
-    getItem().freeze();
-    for (Item controller : getItem().getControlledByList()) {
-      controller.setStateFromColor(getNewHSB());
-    }
-    getItem().unfreeze();
   }
   //--- ItemUpdate.apply ---
   public void ItemUpdateDouble.apply() {
     getItem().setStateFromDouble(getNewValue());
-    getItem().freeze();
-    for (Item controller : getItem().getControlledByList()) {
-      controller.setStateFromDouble(getNewValue());
-    }
-    getItem().unfreeze();
   }
 
   //--- ItemUpdate.describe ---