Support write operation of user label list for User Label Cluster

src/app/clusters/user-label-server/user-label-server.cpp

@@ -45,11 +45,15 @@ class UserLabelAttrAccess : public AttributeAccessInterface
     UserLabelAttrAccess() : AttributeAccessInterface(Optional<EndpointId>::Missing(), UserLabel::Id) {}
 
     CHIP_ERROR Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder) override;
+    CHIP_ERROR Write(const ConcreteDataAttributePath & aPath, AttributeValueDecoder & aDecoder) override;
 
 private:
     CHIP_ERROR ReadLabelList(EndpointId endpoint, AttributeValueEncoder & aEncoder);
+    CHIP_ERROR WriteLabelList(EndpointId endpoint, AttributeValueDecoder & aDecoder);
 };
 
+UserLabelAttrAccess gAttrAccess;
+
 CHIP_ERROR UserLabelAttrAccess::ReadLabelList(EndpointId endpoint, AttributeValueEncoder & aEncoder)
 {
     CHIP_ERROR err = CHIP_NO_ERROR;
@@ -74,7 +78,27 @@ CHIP_ERROR UserLabelAttrAccess::ReadLabelList(EndpointId endpoint, AttributeValu
     return err;
 }
 
-UserLabelAttrAccess gAttrAccess;
+CHIP_ERROR UserLabelAttrAccess::WriteLabelList(EndpointId endpoint, AttributeValueDecoder & aDecoder)
+{
+    DeviceLayer::LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, DeviceLayer::kMaxUserLabels> labelList;
+    LabelList::TypeInfo::DecodableType decodablelist;
+
+    ReturnErrorOnFailure(aDecoder.Decode(decodablelist));
+
+    uint8_t index = 0;
+    auto iter     = decodablelist.begin();
+    while (iter.Next())
+    {
+        auto & entry = iter.GetValue();
+
+        VerifyOrReturnError(index < DeviceLayer::kMaxUserLabels, CHIP_ERROR_BUFFER_TOO_SMALL);
+        labelList.add(entry);
+    }
+
+    ReturnErrorOnFailure(DeviceLayer::PlatformMgr().SetUserLabelList(endpoint, labelList));
+
+    return iter.GetStatus();
+}
 
 CHIP_ERROR UserLabelAttrAccess::Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder)
 {
@@ -89,6 +113,21 @@ CHIP_ERROR UserLabelAttrAccess::Read(const ConcreteReadAttributePath & aPath, At
     }
     return CHIP_NO_ERROR;
 }
+
+CHIP_ERROR UserLabelAttrAccess::Write(const ConcreteDataAttributePath & aPath, AttributeValueDecoder & aDecoder)
+{
+    VerifyOrDie(aPath.mClusterId == UserLabel::Id);
+
+    switch (aPath.mAttributeId)
+    {
+    case LabelList::Id:
+        return WriteLabelList(aPath.mEndpointId, aDecoder);
+    default:
+        break;
+    }
+    return CHIP_NO_ERROR;
+}
+
 } // anonymous namespace
 
 void MatterUserLabelPluginServerInitCallback(void)

src/app/zap-templates/zcl/data-model/chip/user-label-cluster.xml

@@ -29,6 +29,6 @@ limitations under the License.
     <code>0x0041</code>
     <define>USER_LABEL_CLUSTER</define>
     <description>The User Label Cluster provides a feature to tag an endpoint with zero or more labels.</description>
-    <attribute side="server" code="0x0000" define="LABEL_LIST" type="ARRAY" entryType="LabelStruct" length="254" writable="false" optional="false">label list</attribute>
+    <attribute side="server" code="0x0000" define="LABEL_LIST" type="ARRAY" entryType="LabelStruct" length="254" writable="true" optional="false">label list</attribute>
   </cluster>
 </configurator>

src/include/platform/PlatformManager.h

@@ -182,6 +182,8 @@ class PlatformManager
 
     CHIP_ERROR GetFixedLabelList(EndpointId endpoint,
                                  LabelList<app::Clusters::FixedLabel::Structs::LabelStruct::Type, kMaxFixedLabels> & labelList);
+    CHIP_ERROR SetUserLabelList(EndpointId endpoint,
+                                LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
     CHIP_ERROR GetUserLabelList(EndpointId endpoint,
                                 LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
 
@@ -434,6 +436,13 @@ PlatformManager::GetFixedLabelList(EndpointId endpoint,
     return static_cast<ImplClass *>(this)->_GetFixedLabelList(endpoint, labelList);
 }
 
+inline CHIP_ERROR
+PlatformManager::SetUserLabelList(EndpointId endpoint,
+                                  LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)
+{
+    return static_cast<ImplClass *>(this)->_SetUserLabelList(endpoint, labelList);
+}
+
 inline CHIP_ERROR
 PlatformManager::GetUserLabelList(EndpointId endpoint,
                                   LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)

src/include/platform/internal/GenericPlatformManagerImpl.h

@@ -60,6 +60,8 @@ class GenericPlatformManagerImpl
 
     CHIP_ERROR _GetFixedLabelList(EndpointId endpoint,
                                   LabelList<app::Clusters::FixedLabel::Structs::LabelStruct::Type, kMaxFixedLabels> & labelList);
+    CHIP_ERROR _SetUserLabelList(EndpointId endpoint,
+                                 LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
     CHIP_ERROR _GetUserLabelList(EndpointId endpoint,
                                  LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
 
@@ -85,6 +87,13 @@ inline CHIP_ERROR GenericPlatformManagerImpl<ImplClass>::_GetFixedLabelList(
     return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
 }
 
+template <class ImplClass>
+inline CHIP_ERROR GenericPlatformManagerImpl<ImplClass>::_SetUserLabelList(
+    EndpointId endpoint, LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)
+{
+    return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
+}
+
 template <class ImplClass>
 inline CHIP_ERROR GenericPlatformManagerImpl<ImplClass>::_GetUserLabelList(
     EndpointId endpoint, LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)

src/platform/Linux/PlatformManagerImpl.cpp

@@ -301,6 +301,14 @@ CHIP_ERROR PlatformManagerImpl::_GetFixedLabelList(
     return CHIP_NO_ERROR;
 }
 
+CHIP_ERROR
+PlatformManagerImpl::_SetUserLabelList(EndpointId endpoint,
+                                       LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)
+{
+    // TODO:: store the user labelList, and read back stored user labelList if it has been set. Add yaml test to verify this.
+    return CHIP_NO_ERROR;
+}
+
 CHIP_ERROR
 PlatformManagerImpl::_GetUserLabelList(EndpointId endpoint,
                                        LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)

src/platform/Linux/PlatformManagerImpl.h

@@ -67,6 +67,8 @@ class PlatformManagerImpl final : public PlatformManager, public Internal::Gener
     CHIP_ERROR _Shutdown();
     CHIP_ERROR _GetFixedLabelList(EndpointId endpoint,
                                   LabelList<app::Clusters::FixedLabel::Structs::LabelStruct::Type, kMaxFixedLabels> & labelList);
+    CHIP_ERROR _SetUserLabelList(EndpointId endpoint,
+                                 LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
     CHIP_ERROR _GetUserLabelList(EndpointId endpoint,
                                  LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList);
 

src/platform/fake/PlatformManagerImpl.h

@@ -104,6 +104,12 @@ class PlatformManagerImpl final : public PlatformManager
         return CHIP_ERROR_NOT_IMPLEMENTED;
     }
 
+    CHIP_ERROR _SetUserLabelList(EndpointId endpoint,
+                                 LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)
+    {
+        return CHIP_ERROR_NOT_IMPLEMENTED;
+    }
+
     CHIP_ERROR _GetUserLabelList(EndpointId endpoint,
                                  LabelList<app::Clusters::UserLabel::Structs::LabelStruct::Type, kMaxUserLabels> & labelList)
     {