UI: roadmap-entry for getUpdateOnLoadCode

src/UI/Implementation/Component/Input/Field/Input.php

@@ -480,14 +480,29 @@ final public function getContent() {
 	 */
 	public function getUpdateOnLoadCode(): \Closure
 	{
-		// TODO: Implement getUpdateOnLoadCode() method for each input if needed.
+		throw new \Exception(
+			"This is not implemented yet. Every Input needs to implement ".
+			"this, but to be able to move on currently this is broken. ".
+			"If you see this message, please file a bug at mantis.ilias.de. ".
+			"Also have a look into the roadmap: \"Implement `Input::getUpdateOnLoadCode`, ".
+			"`Input::withOnUpdate` and `Input::appendOnUpdate` for every Input"
+		);
+		// TODO: This method will need to be removed.
 	}
 
 	/**
 	 * @inheritdoc
 	 */
 	public function withOnUpdate(Signal $signal)
 	{
+		// TODO: This exception will need to be removed.
+		throw new \Exception(
+			"This is not implemented yet. Every Input needs to implement ".
+			"this, but to be able to move on currently this is broken. ".
+			"If you see this message, please file a bug at mantis.ilias.de. ".
+			"Also have a look into the roadmap: \"Implement `Input::getUpdateOnLoadCode`, ".
+			"`Input::withOnUpdate` and `Input::appendOnUpdate` for every Input"
+		);
 		return $this->withTriggeredSignal($signal, 'update');
 	}
 
@@ -496,6 +511,14 @@ public function withOnUpdate(Signal $signal)
 	 */
 	public function appendOnUpdate(Signal $signal)
 	{
+		// TODO: This exception will need to be removed.
+		throw new \Exception(
+			"This is not implemented yet. Every Input needs to implement ".
+			"this, but to be able to move on currently this is broken. ".
+			"If you see this message, please file a bug at mantis.ilias.de. ".
+			"Also have a look into the roadmap: \"Implement `Input::getUpdateOnLoadCode`, ".
+			"`Input::withOnUpdate` and `Input::appendOnUpdate` for every Input"
+		);
 		return $this->appendTriggeredSignal($signal, 'update');
 	}
 }

src/UI/Implementation/Component/Input/Field/Select.php

@@ -78,4 +78,23 @@ public function getUpdateOnLoadCode(): \Closure
 		};
 	}
 
+	/**
+	 * @inheritdoc
+	 */
+	public function withOnUpdate(Signal $signal)
+	{
+		// TODO: This method will need to be removed.
+		// See ILIAS\UI\Implementation\Component\Input\Field\Input
+		return $this->withTriggeredSignal($signal, 'update');
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function appendOnUpdate(Signal $signal)
+	{
+		// TODO: This method will need to be removed.
+		// See ILIAS\UI\Implementation\Component\Input\Field\Input
+		return $this->appendTriggeredSignal($signal, 'update');
+	}
 }

src/UI/Implementation/Component/Input/Field/Text.php

@@ -57,4 +57,24 @@ public function getUpdateOnLoadCode(): \Closure
 			return $code;
 		};
 	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function withOnUpdate(Signal $signal)
+	{
+		// TODO: This method will need to be removed.
+		// See ILIAS\UI\Implementation\Component\Input\Field\Input
+		return $this->withTriggeredSignal($signal, 'update');
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function appendOnUpdate(Signal $signal)
+	{
+		// TODO: This method will need to be removed.
+		// See ILIAS\UI\Implementation\Component\Input\Field\Input
+		return $this->appendTriggeredSignal($signal, 'update');
+	}
 }

src/UI/ROADMAP.md

@@ -91,6 +91,23 @@ to construct a new Counter.
 It would be handy to have a "withNumber"-mutator, or something like
 "withIncrease/withDecrease"
 
+### Implement `Input::getUpdateOnLoadCode`, `Input::withOnUpdate` and `Input::appendOnUpdate` for every Input (advanced, ~4h)
+
+When introducing [UI Filters](https://github.com/ILIAS-eLearning/ILIAS/pull/1735)
+some ends have been left open and need to be implemented properly. Currently
+`withOnUpdate` and `appendOnUpdate` do not work on Inputs in the general case and
+only work for `Select Field` and `Text Field` in the context of the filter. To
+let the promise of `OnUpdate` come true, the following things will need to be done:
+
+* Every Input needs to implement `Input::getUpdateOnLoadCode`.
+* Once this is done, the method `Input::getUpdateOnLoadCode` on the base class
+should be removed to force new inputs to implement this method properly.
+* The usage of the method should be moved from the (specific) `Container\Filter\Renderer`
+to the (general) `Field\Renderer` to make `OnUpdate` apply everywhere.
+* `Input::withOnUpdate` and `Input::appendOnUpdate` can then be reinstated on the
+base class and removed on `Field\Select` and `Field\Text`.
+
+New inputs must already implement the methods.
 
 ## Long Term