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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2022-2023 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.ncmp.api.impl.events.lcm;
import static org.onap.cps.ncmp.api.impl.events.lcm.LcmEventType.CREATE;
import static org.onap.cps.ncmp.api.impl.events.lcm.LcmEventType.DELETE;
import static org.onap.cps.ncmp.api.impl.events.lcm.LcmEventType.UPDATE;
import static org.onap.cps.ncmp.api.inventory.CmHandleState.DELETED;
import com.google.common.collect.MapDifference;
import com.google.common.collect.Maps;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.cps.ncmp.api.models.NcmpServiceCmHandle;
import org.onap.ncmp.cmhandle.event.lcm.Values;
/**
* LcmEventsCreatorHelper has helper methods to create LcmEvent.
* Determine the lcm event type i.e create,update and delete.
* Based on lcm event type create the LcmEvent payload.
*/
@Slf4j
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class LcmEventsCreatorHelper {
/**
* Determining the event type based on the composite state.
*
* @param targetNcmpServiceCmHandle target ncmpServiceCmHandle
* @param existingNcmpServiceCmHandle existing ncmpServiceCmHandle
* @return Event Type
*/
public static LcmEventType determineEventType(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle) {
if (existingNcmpServiceCmHandle.getCompositeState() == null) {
return CREATE;
} else if (targetNcmpServiceCmHandle.getCompositeState().getCmHandleState() == DELETED) {
return DELETE;
}
return UPDATE;
}
/**
* Determine the cmhandle value difference pair.Contains the difference in the form of oldValues and newValues.
*
* @param targetNcmpServiceCmHandle target ncmpServiceCmHandle
* @param existingNcmpServiceCmHandle existing ncmpServiceCmHandle
* @param lcmEventType lcm event type
* @return Lcm Event Value difference pair
*/
public static LcmEventsCreator.CmHandleValuesHolder determineEventValues(
final NcmpServiceCmHandle targetNcmpServiceCmHandle, final NcmpServiceCmHandle existingNcmpServiceCmHandle,
final LcmEventType lcmEventType) {
if (CREATE == lcmEventType) {
return determineCreateEventValues(targetNcmpServiceCmHandle);
} else if (UPDATE == lcmEventType) {
return determineUpdateEventValues(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle);
}
return new LcmEventsCreator.CmHandleValuesHolder();
}
private static LcmEventsCreator.CmHandleValuesHolder determineCreateEventValues(
final NcmpServiceCmHandle ncmpServiceCmHandle) {
final LcmEventsCreator.CmHandleValuesHolder cmHandleValuesHolder = new LcmEventsCreator.CmHandleValuesHolder();
cmHandleValuesHolder.setNewValues(new Values());
cmHandleValuesHolder.getNewValues().setDataSyncEnabled(getDataSyncEnabledFlag(ncmpServiceCmHandle));
cmHandleValuesHolder.getNewValues()
.setCmHandleState(mapCmHandleStateToLcmEventCmHandleState(ncmpServiceCmHandle));
cmHandleValuesHolder.getNewValues().setCmHandleProperties(List.of(ncmpServiceCmHandle.getPublicProperties()));
return cmHandleValuesHolder;
}
private static LcmEventsCreator.CmHandleValuesHolder determineUpdateEventValues(
final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle) {
final boolean hasDataSyncFlagEnabledChanged =
hasDataSyncEnabledFlagChanged(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle);
final boolean hasCmHandleStateChanged =
hasCmHandleStateChanged(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle);
final boolean arePublicCmHandlePropertiesEqual =
arePublicCmHandlePropertiesEqual(targetNcmpServiceCmHandle.getPublicProperties(),
existingNcmpServiceCmHandle.getPublicProperties());
final LcmEventsCreator.CmHandleValuesHolder cmHandleValuesHolder = new LcmEventsCreator.CmHandleValuesHolder();
if (hasDataSyncFlagEnabledChanged || hasCmHandleStateChanged || (!arePublicCmHandlePropertiesEqual)) {
cmHandleValuesHolder.setOldValues(new Values());
cmHandleValuesHolder.setNewValues(new Values());
} else {
return cmHandleValuesHolder;
}
if (hasDataSyncFlagEnabledChanged) {
setDataSyncEnabledFlag(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle, cmHandleValuesHolder);
}
if (hasCmHandleStateChanged) {
setCmHandleStateChange(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle, cmHandleValuesHolder);
}
if (!arePublicCmHandlePropertiesEqual) {
setPublicCmHandlePropertiesChange(targetNcmpServiceCmHandle, existingNcmpServiceCmHandle,
cmHandleValuesHolder);
}
return cmHandleValuesHolder;
}
private static void setDataSyncEnabledFlag(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle,
final LcmEventsCreator.CmHandleValuesHolder cmHandleValuesHolder) {
cmHandleValuesHolder.getOldValues().setDataSyncEnabled(getDataSyncEnabledFlag(existingNcmpServiceCmHandle));
cmHandleValuesHolder.getNewValues().setDataSyncEnabled(getDataSyncEnabledFlag(targetNcmpServiceCmHandle));
}
private static void setCmHandleStateChange(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle,
final LcmEventsCreator.CmHandleValuesHolder cmHandleValuesHolder) {
cmHandleValuesHolder.getOldValues()
.setCmHandleState(mapCmHandleStateToLcmEventCmHandleState(existingNcmpServiceCmHandle));
cmHandleValuesHolder.getNewValues()
.setCmHandleState(mapCmHandleStateToLcmEventCmHandleState(targetNcmpServiceCmHandle));
}
private static void setPublicCmHandlePropertiesChange(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle,
final LcmEventsCreator.CmHandleValuesHolder cmHandleValuesHolder) {
final Map<String, Map<String, String>> publicCmHandlePropertiesDifference =
getPublicCmHandlePropertiesDifference(targetNcmpServiceCmHandle.getPublicProperties(),
existingNcmpServiceCmHandle.getPublicProperties());
cmHandleValuesHolder.getOldValues()
.setCmHandleProperties(List.of(publicCmHandlePropertiesDifference.get("oldValues")));
cmHandleValuesHolder.getNewValues()
.setCmHandleProperties(List.of(publicCmHandlePropertiesDifference.get("newValues")));
}
private static Values.CmHandleState mapCmHandleStateToLcmEventCmHandleState(
final NcmpServiceCmHandle ncmpServiceCmHandle) {
return Values.CmHandleState.fromValue(ncmpServiceCmHandle.getCompositeState().getCmHandleState().name());
}
private static Boolean getDataSyncEnabledFlag(final NcmpServiceCmHandle ncmpServiceCmHandle) {
return ncmpServiceCmHandle.getCompositeState().getDataSyncEnabled();
}
private static boolean hasDataSyncEnabledFlagChanged(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle) {
final Boolean targetDataSyncFlag = targetNcmpServiceCmHandle.getCompositeState().getDataSyncEnabled();
final Boolean existingDataSyncFlag = existingNcmpServiceCmHandle.getCompositeState().getDataSyncEnabled();
if (targetDataSyncFlag == null) {
return existingDataSyncFlag != null;
}
return !targetDataSyncFlag.equals(existingDataSyncFlag);
}
private static boolean hasCmHandleStateChanged(final NcmpServiceCmHandle targetNcmpServiceCmHandle,
final NcmpServiceCmHandle existingNcmpServiceCmHandle) {
return targetNcmpServiceCmHandle.getCompositeState().getCmHandleState()
!= existingNcmpServiceCmHandle.getCompositeState().getCmHandleState();
}
private static boolean arePublicCmHandlePropertiesEqual(final Map<String, String> targetCmHandleProperties,
final Map<String, String> existingCmHandleProperties) {
if (targetCmHandleProperties.size() != existingCmHandleProperties.size()) {
return false;
}
return targetCmHandleProperties.equals(existingCmHandleProperties);
}
private static Map<String, Map<String, String>> getPublicCmHandlePropertiesDifference(
final Map<String, String> targetCmHandleProperties, final Map<String, String> existingCmHandleProperties) {
final Map<String, Map<String, String>> oldAndNewPropertiesDifferenceMap = new HashMap<>(2);
final MapDifference<String, String> cmHandlePropertiesDifference =
Maps.difference(targetCmHandleProperties, existingCmHandleProperties);
final Map<String, String> newValues = new HashMap<>(cmHandlePropertiesDifference.entriesOnlyOnLeft());
final Map<String, String> oldValues = new HashMap<>(cmHandlePropertiesDifference.entriesOnlyOnRight());
cmHandlePropertiesDifference.entriesDiffering().keySet().forEach(cmHandlePropertyName -> {
oldValues.put(cmHandlePropertyName, existingCmHandleProperties.get(cmHandlePropertyName));
newValues.put(cmHandlePropertyName, targetCmHandleProperties.get(cmHandlePropertyName));
});
oldAndNewPropertiesDifferenceMap.put("oldValues", oldValues);
oldAndNewPropertiesDifferenceMap.put("newValues", newValues);
return oldAndNewPropertiesDifferenceMap;
}
}
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