Make attribute-storage.h API surface smaller (#31568)

* Move emberAfClusterCountForEndpointType to be private to attribute-storage.h

* Also move emberAfClusterCountByIndex

* Move more things to private ... this potentially shows that scene table has bugs?

* It turns method unused: remove it

---------

Co-authored-by: Andrei Litvin <andreilitvin@google.com>

src/app/util/attribute-storage.cpp

@@ -65,6 +65,18 @@ static bool emAfMatchCluster(const EmberAfCluster * cluster, const EmberAfAttrib
 static bool emAfMatchAttribute(const EmberAfCluster * cluster, const EmberAfAttributeMetadata * am,
  const EmberAfAttributeSearchRecord * attRecord);
 
+// If server == true, returns the number of server clusters,
+// otherwise number of client clusters on the endpoint at the given index.
+static uint8_t emberAfClusterCountForEndpointType(const EmberAfEndpointType * endpointType, bool server);
+
+// If server == true, returns the number of server clusters,
+// otherwise number of client clusters on the endpoint at the given index.
+static uint8_t emberAfClusterCountByIndex(uint16_t endpointIndex, bool server);
+
+// Check whether there is an endpoint defined with the given endpoint id that is
+// enabled.
+static bool emberAfEndpointIsEnabled(chip::EndpointId endpoint);
+
 namespace {
 
 #if (!defined(ATTRIBUTE_SINGLETONS_SIZE)) || (ATTRIBUTE_SINGLETONS_SIZE == 0)
@@ -1052,33 +1064,6 @@ uint8_t emberAfGetClusterCountForEndpoint(EndpointId endpoint)
  return emAfEndpoints[index].endpointType->clusterCount;
 }
 
-// Note the difference in implementation from emberAfGetNthCluster().
-// emberAfGetClusterByIndex() retrieves the cluster by index regardless of server/client
-// and those indexes may be DIFFERENT than the indexes returned from
-// emberAfGetNthCluster(). In other words:
-//
-// - Use emberAfGetClustersFromEndpoint() with emberAfGetNthCluster()
-// - Use emberAfGetClusterCountForEndpoint() with emberAfGetClusterByIndex()
-//
-// Don't mix them.
-const EmberAfCluster * emberAfGetClusterByIndex(EndpointId endpoint, uint8_t clusterIndex)
-{
- uint16_t endpointIndex = emberAfIndexFromEndpoint(endpoint);
- EmberAfDefinedEndpoint * definedEndpoint;
-
- if (endpointIndex == kEmberInvalidEndpointIndex)
- {
- return nullptr;
- }
- definedEndpoint = &(emAfEndpoints[endpointIndex]);
-
- if (clusterIndex >= definedEndpoint->endpointType->clusterCount)
- {
- return nullptr;
- }
- return &(definedEndpoint->endpointType->cluster[clusterIndex]);
-}
-
 chip::Span<const EmberAfDeviceType> emberAfDeviceTypeListFromEndpoint(chip::EndpointId endpoint, CHIP_ERROR & err)
 {
  uint16_t endpointIndex = emberAfIndexFromEndpoint(endpoint);

src/app/util/attribute-storage.h

@@ -114,14 +114,6 @@ uint8_t emberAfClusterIndex(chip::EndpointId endpoint, chip::ClusterId clusterId
 // otherwise number of client clusters on this endpoint
 uint8_t emberAfClusterCount(chip::EndpointId endpoint, bool server);
 
-// If server == true, returns the number of server clusters,
-// otherwise number of client clusters on the endpoint at the given index.
-uint8_t emberAfClusterCountByIndex(uint16_t endpointIndex, bool server);
-
-// If server == true, returns the number of server clusters,
-// otherwise number of client clusters on the endpoint at the given index.
-uint8_t emberAfClusterCountForEndpointType(const EmberAfEndpointType * endpointType, bool server);
-
 // Returns the cluster of Nth server or client cluster,
 // depending on server toggle.
 const EmberAfCluster * emberAfGetNthCluster(chip::EndpointId endpoint, uint8_t n, bool server);
@@ -160,21 +152,12 @@ void emAfClusterAttributeChangedCallback(const chip::app::ConcreteAttributePath
 EmberAfStatus emAfClusterPreAttributeChangedCallback(const chip::app::ConcreteAttributePath & attributePath,
  EmberAfAttributeType attributeType, uint16_t size, uint8_t * value);
 
-// Check whether there is an endpoint defined with the given endpoint id that is
-// enabled.
-bool emberAfEndpointIsEnabled(chip::EndpointId endpoint);
-
-// Note the difference in implementation from emberAfGetNthCluster().
-// emberAfGetClusterByIndex() retrieves the cluster by index regardless of server/client
-// and those indexes may be DIFFERENT than the indexes returned from
-// emberAfGetNthCluster(). In other words:
-//
+// Note the difference in for server filtering.
+// This method will return the cluster count for BOTH client and server
+// and those do NOT work with NthCluster/NthClusterId
 // - Use emberAfGetClustersFromEndpoint() with emberAfGetNthCluster() emberAfGetNthClusterId()
-// - Use emberAfGetClusterCountForEndpoint() with emberAfGetClusterByIndex()
 //
-// Don't mix them.
 uint8_t emberAfGetClusterCountForEndpoint(chip::EndpointId endpoint);
-const EmberAfCluster * emberAfGetClusterByIndex(chip::EndpointId endpoint, uint8_t clusterIndex);
 
 //
 // Retrieve the device type list associated with a specific endpoint.