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/*
*
* Copyright (c) 2021 Project CHIP Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/****************************************************************************
* @file
* @brief Implementation for the User Label Server Cluster
***************************************************************************/
#include <app-common/zap-generated/af-structs.h>
#include <app-common/zap-generated/cluster-objects.h>
#include <app-common/zap-generated/ids/Attributes.h>
#include <app-common/zap-generated/ids/Clusters.h>
#include <app/AttributeAccessInterface.h>
#include <app/server/Server.h>
#include <app/util/attribute-storage.h>
#include <credentials/FabricTable.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <platform/DeviceInfoProvider.h>
#include <platform/PlatformManager.h>
using namespace chip;
using namespace chip::app;
using namespace chip::app::Clusters;
using namespace chip::app::Clusters::UserLabel;
using namespace chip::app::Clusters::UserLabel::Attributes;
namespace {
class UserLabelAttrAccess : public AttributeAccessInterface
{
public:
// Register for the User Label cluster on all endpoints.
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(const ConcreteDataAttributePath & aPath, AttributeValueDecoder & aDecoder);
};
/// Matches constraints on a LabelStruct.
bool IsValidLabelEntry(const Structs::LabelStruct::Type & entry)
{
constexpr size_t kMaxLabelSize = 16;
constexpr size_t kMaxValueSize = 16;
// NOTE: spec default for label and value is empty, so empty is accepted here
return (entry.label.size() <= kMaxLabelSize) && (entry.value.size() <= kMaxValueSize);
}
bool IsValidLabelEntryList(const LabelList::TypeInfo::DecodableType & list)
{
auto iter = list.begin();
while (iter.Next())
{
if (!IsValidLabelEntry(iter.GetValue()))
{
return false;
}
}
return true;
}
UserLabelAttrAccess gAttrAccess;
CHIP_ERROR UserLabelAttrAccess::ReadLabelList(EndpointId endpoint, AttributeValueEncoder & aEncoder)
{
CHIP_ERROR err = CHIP_NO_ERROR;
DeviceLayer::DeviceInfoProvider * provider = DeviceLayer::GetDeviceInfoProvider();
if (provider)
{
DeviceLayer::DeviceInfoProvider::UserLabelIterator * it = provider->IterateUserLabel(endpoint);
if (it)
{
err = aEncoder.EncodeList([&it](const auto & encoder) -> CHIP_ERROR {
UserLabel::Structs::LabelStruct::Type userlabel;
while (it->Next(userlabel))
{
ReturnErrorOnFailure(encoder.Encode(userlabel));
}
return CHIP_NO_ERROR;
});
it->Release();
}
else
{
err = aEncoder.EncodeEmptyList();
}
}
else
{
err = aEncoder.EncodeEmptyList();
}
return err;
}
CHIP_ERROR UserLabelAttrAccess::WriteLabelList(const ConcreteDataAttributePath & aPath, AttributeValueDecoder & aDecoder)
{
EndpointId endpoint = aPath.mEndpointId;
DeviceLayer::DeviceInfoProvider * provider = DeviceLayer::GetDeviceInfoProvider();
VerifyOrReturnError(provider != nullptr, CHIP_ERROR_NOT_IMPLEMENTED);
if (!aPath.IsListItemOperation())
{
DeviceLayer::AttributeList<Structs::LabelStruct::Type, DeviceLayer::kMaxUserLabelListLength> labelList;
LabelList::TypeInfo::DecodableType decodablelist;
ReturnErrorOnFailure(aDecoder.Decode(decodablelist));
ReturnErrorCodeIf(!IsValidLabelEntryList(decodablelist), CHIP_IM_GLOBAL_STATUS(ConstraintError));
auto iter = decodablelist.begin();
while (iter.Next())
{
auto & entry = iter.GetValue();
ReturnErrorOnFailure(labelList.add(entry));
}
ReturnErrorOnFailure(iter.GetStatus());
return provider->SetUserLabelList(endpoint, labelList);
}
if (aPath.mListOp == ConcreteDataAttributePath::ListOperation::AppendItem)
{
Structs::LabelStruct::DecodableType entry;
ReturnErrorOnFailure(aDecoder.Decode(entry));
ReturnErrorCodeIf(!IsValidLabelEntry(entry), CHIP_IM_GLOBAL_STATUS(ConstraintError));
return provider->AppendUserLabel(endpoint, entry);
}
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
}
CHIP_ERROR UserLabelAttrAccess::Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder)
{
VerifyOrDie(aPath.mClusterId == UserLabel::Id);
switch (aPath.mAttributeId)
{
case LabelList::Id:
return ReadLabelList(aPath.mEndpointId, aEncoder);
default:
break;
}
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, aDecoder);
default:
break;
}
return CHIP_NO_ERROR;
}
} // anonymous namespace
class UserLabelFabricTableDelegate : public chip::FabricTable::Delegate
{
public:
// Gets called when a fabric is deleted
void OnFabricRemoved(const FabricTable & fabricTable, FabricIndex fabricIndex) override
{
// If the FabricIndex matches the last remaining entry in the Fabrics list, then the device SHALL delete all Matter
// related data on the node which was created since it was commissioned.
if (Server::GetInstance().GetFabricTable().FabricCount() == 0)
{
ChipLogProgress(Zcl, "UserLabel: Last Fabric index 0x%x was removed", static_cast<unsigned>(fabricIndex));
// Delete all user label data on the node which was added since it was commissioned.
DeviceLayer::DeviceInfoProvider * provider = DeviceLayer::GetDeviceInfoProvider();
if (provider)
{
for (auto endpoint : EnabledEndpointsWithServerCluster(UserLabel::Id))
{
// If UserLabel cluster is implemented on this endpoint
if (CHIP_NO_ERROR != provider->ClearUserLabelList(endpoint))
{
ChipLogError(Zcl, "UserLabel::Failed to clear UserLabelList for endpoint:%d", endpoint);
}
}
}
}
}
};
UserLabelFabricTableDelegate gUserLabelFabricDelegate;
void MatterUserLabelPluginServerInitCallback()
{
registerAttributeAccessOverride(&gAttrAccess);
Server::GetInstance().GetFabricTable().AddFabricDelegate(&gUserLabelFabricDelegate);
}