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/*
*
* Copyright (c) 2023 Project CHIP Authors
* All rights reserved.
*
* 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.
*/
#pragma once
#include "TimeSyncDataProvider.h"
#include <app-common/zap-generated/attributes/Accessors.h>
#include <app-common/zap-generated/cluster-objects.h>
#include <lib/support/Span.h>
#include <protocols/interaction_model/StatusCode.h>
namespace chip {
namespace app {
namespace Clusters {
namespace TimeSynchronization {
typedef void (*OnTimeSyncCompletion)(void * context, TimeSourceEnum timeSource, GranularityEnum granularity);
typedef void (*OnFallbackNTPCompletion)(void * context, bool timeSyncSuccessful);
/** @brief
* Defines methods for implementing application-specific logic for the Time Synchronization Cluster.
*/
class Delegate
{
// using TimeZoneList = Span<TimeSyncDataProvider::TimeZoneStore>;
public:
inline bool HasFeature(Feature feature)
{
uint32_t map;
bool success = (Attributes::FeatureMap::Get(mEndpoint, &map) == Protocols::InteractionModel::Status::Success);
return success ? (map & to_underlying(feature)) : false;
}
inline EndpointId GetEndpoint() { return mEndpoint; }
inline void SetEndpoint(EndpointId ep) { mEndpoint = ep; }
/**
* @brief Notifies the delegate that the cluster's configured list of time zones has changed.
*
* @param timeZoneList new time zone list
*/
virtual void TimeZoneListChanged(const Span<TimeSyncDataProvider::TimeZoneStore> timeZoneList) = 0;
/**
* @brief Give the delegate the chance to call SetDSTOffset on the TimeSynchronizationServer with a list of
* DST offsets based on the provided time zone name. If the delegate does so, it should return true.
* If the delegate does not want to set DST offsets based on the time zone, it should return false.
*
* @param name name of active time zone
*/
virtual bool HandleUpdateDSTOffset(const CharSpan name) = 0;
/**
* @brief Returns true if the provided string is a valid NTP address (either domain name or IPv6 address).
*
* @param ntp NTP address
*/
virtual bool IsNTPAddressValid(const CharSpan ntp) = 0;
/**
* @brief Returns true if a valid NTP address is a domain name as opposed to an IPv6 address.
*
* @param ntp NTP address
*/
virtual bool IsNTPAddressDomain(const CharSpan ntp) = 0;
/**
* @brief Delegate should attempt to get time from a platform-defined source using the ordering defined in the
* Time source prioritization spec section. Delegate may skip any unsupported sources
* Order: GNSS -> trusted high-resolution external source (PTP, trusted network NTP, cloud) ->
* local network defined NTP (DHCPv6 -> DHCP -> DNS-SD sources)
* If the delegate is unable to support any source, it may return an error immediately. If the delegate is going
* to attempt to obtain time from any source, it returns CHIP_NO_ERROR and calls the callback on completion.
* If the delegate has a time available at the time of this call, it may call the callback synchronously from within
* this function.
* If the delegate needs to reach out asynchronously to obtain a time, it saves this callback to call asynchronously.
* The delegate should track these callbacks in a CallbackDeque to ensure they can be properly cancelled.
* If the delegate is successful in obtaining the time, it sets the time using the platform time API (SetClock_RealTime)
* and calls the callback with the time source and granularity set as appropriate.
* If the delegate is unsuccessful in obtaining the time, it calls the callback with timeSource set to kNone and
* granularity set to kNoTimeGranularity.
*/
virtual CHIP_ERROR UpdateTimeFromPlatformSource(chip::Callback::Callback<OnTimeSyncCompletion> * callback) = 0;
/**
* @brief If the delegate supports NTP, it should attempt to update its time using the provided fallbackNTP source.
* If the delegate is successful in obtaining a time from the fallbackNTP, it updates the system time (ex using
* System::SystemClock().SetClock_RealTime) and calls the callback. If the delegate is going to attempt to update
* the time and call the callback, it returns CHIP_NO_ERROR. If the delegate does not support NTP, it may return
* a CHIP_ERROR.
*/
virtual CHIP_ERROR UpdateTimeUsingNTPFallback(const CharSpan & fallbackNTP,
chip::Callback::Callback<OnFallbackNTPCompletion> * callback) = 0;
/**
* @brief Signals application that UTCTime has changed through the timesync cluster.
*/
virtual void UTCTimeAvailabilityChanged(uint64_t time) = 0;
virtual ~Delegate() = default;
private:
EndpointId mEndpoint = kRootEndpointId;
};
} // namespace TimeSynchronization
} // namespace Clusters
} // namespace app
} // namespace chip