Move Level Control OnOff feature check into OnOff cluster. (#23820)

This simplifies the coupling a bit by doing this runtime feature check in the
same place where we are already doing the runtime check for existence of a
relevant Level Control cluster.  This allows us to remove some code in Level
Control that was duplicating existing code in On/Off.

src/app/clusters/level-control/level-control.cpp

@@ -1084,20 +1084,6 @@ void emberAfOnOffClusterLevelControlEffectCallback(EndpointId endpoint, bool new
         return;
     }
 
-    // if the OnOff feature is not supported, the effect on LevelControl is ignored
-    if (!HasFeature(endpoint, chip::app::Clusters::LevelControl::LevelControlFeature::kOnOff))
-    {
-        emberAfLevelControlClusterPrintln("OnOff feature not supported, ignore LevelControlEffect");
-        if (!newValue)
-        {
-            // OnOff server expects LevelControl to handle the OnOff attribute change,
-            // when going to off state. The attribute is set directly rather
-            // than using setOnOff function to avoid misleading comments in log.
-            OnOff::Attributes::OnOff::Set(endpoint, OnOff::Commands::Off::Id);
-        }
-        return;
-    }
-
     uint8_t minimumLevelAllowedForTheDevice = state->minLevel;
 
     // "Temporarily store CurrentLevel."
@@ -1312,7 +1298,7 @@ static bool areStartUpLevelControlServerAttributesNonVolatile(EndpointId endpoin
 
 void emberAfPluginLevelControlClusterServerPostInitCallback(EndpointId endpoint) {}
 
-bool HasFeature(chip::EndpointId endpoint, chip::app::Clusters::LevelControl::LevelControlFeature feature)
+bool LevelControlHasFeature(EndpointId endpoint, LevelControlFeature feature)
 {
     bool success;
     uint32_t featureMap;

src/app/clusters/level-control/level-control.h

@@ -26,16 +26,21 @@
 
 #include <stdint.h>
 
-#include <app-common/zap-generated/cluster-objects.h>
+#include <app-common/zap-generated/cluster-enums.h>
 #include <app/util/basic-types.h>
 
-/** @brief On/off Cluster Server Post Init
+/** @brief Level Control Cluster Server Post Init
  *
- * Following resolution of the On/Off state at startup for this endpoint, perform any
+ * Following resolution of the Level Control state at startup for this endpoint, perform any
  * additional initialization needed; e.g., synchronize hardware state.
  *
  * @param endpoint Endpoint that is being initialized  Ver.: always
  */
 void emberAfPluginLevelControlClusterServerPostInitCallback(chip::EndpointId endpoint);
 
-bool HasFeature(chip::EndpointId endpoint, chip::app::Clusters::LevelControl::LevelControlFeature feature);
+/**
+ * Check whether the instance of the Level Control cluster on the given endpoint
+ * has the given feature.  The implementation is allowed to assume there is in
+ * fact an instance of Level Control on the given endpoint.
+ */
+bool LevelControlHasFeature(chip::EndpointId endpoint, chip::app::Clusters::LevelControl::LevelControlFeature feature);

src/app/clusters/on-off-server/on-off-server.cpp

@@ -28,6 +28,10 @@
 #include <app/clusters/scenes/scenes.h>
 #endif // EMBER_AF_PLUGIN_SCENES
 
+#ifdef EMBER_AF_PLUGIN_LEVEL_CONTROL
+#include <app/clusters/level-control/level-control.h>
+#endif // EMBER_AF_PLUGIN_LEVEL_CONTROL
+
 using namespace chip;
 using namespace chip::app::Clusters;
 using namespace chip::app::Clusters::OnOff;
@@ -77,6 +81,18 @@ EmberAfStatus OnOffServer::getOnOffValue(chip::EndpointId endpoint, bool * curre
     return status;
 }
 
+#ifdef EMBER_AF_PLUGIN_LEVEL_CONTROL
+static bool LevelControlWithOnOffFeaturePresent(EndpointId endpoint)
+{
+    if (!emberAfContainsServer(endpoint, LevelControl::Id))
+    {
+        return false;
+    }
+
+    return LevelControlHasFeature(endpoint, LevelControl::LevelControlFeature::kOnOff);
+}
+#endif // EMBER_AF_PLUGIN_LEVEL_CONTROL
+
 /** @brief On/off Cluster Set Value
  *
  * This function is called when the on/off value needs to be set, either through
@@ -153,7 +169,7 @@ EmberAfStatus OnOffServer::setOnOffValue(chip::EndpointId endpoint, chip::Comman
 #ifdef EMBER_AF_PLUGIN_LEVEL_CONTROL
         // If initiatedByLevelChange is false, then we assume that the level change
         // ZCL stuff has not happened and we do it here
-        if (!initiatedByLevelChange && emberAfContainsServer(endpoint, LevelControl::Id))
+        if (!initiatedByLevelChange && LevelControlWithOnOffFeaturePresent(endpoint))
         {
             emberAfOnOffClusterLevelControlEffectCallback(endpoint, newValue);
         }
@@ -183,7 +199,7 @@ EmberAfStatus OnOffServer::setOnOffValue(chip::EndpointId endpoint, chip::Comman
 #ifdef EMBER_AF_PLUGIN_LEVEL_CONTROL
         // If initiatedByLevelChange is false, then we assume that the level change
         // ZCL stuff has not happened and we do it here
-        if (!initiatedByLevelChange && emberAfContainsServer(endpoint, LevelControl::Id))
+        if (!initiatedByLevelChange && LevelControlWithOnOffFeaturePresent(endpoint))
         {
             emberAfOnOffClusterLevelControlEffectCallback(endpoint, newValue);
         }