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package org.openecomp.core.zusammen.plugin.collaboration;
import com.amdocs.zusammen.datatypes.Id;
import com.amdocs.zusammen.datatypes.SessionContext;
import com.amdocs.zusammen.datatypes.item.ElementContext;
import org.openecomp.core.zusammen.plugin.dao.types.ElementEntity;
import org.openecomp.core.zusammen.plugin.dao.types.SynchronizationStateEntity;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
public class RevertService {
private ElementPublicStore elementPublicStore;
private ElementPrivateStore elementPrivateStore;
public RevertService(ElementPublicStore elementPublicStore,
ElementPrivateStore elementPrivateStore) {
this.elementPublicStore = elementPublicStore;
this.elementPrivateStore = elementPrivateStore;
}
public void revert(SessionContext context, Id itemId, Id versionId, Id revisionId) {
ElementContext targetContext = new ElementContext(itemId, versionId);
ElementContext sourceContext = new ElementContext(itemId, versionId, revisionId);
copyElementsFromPublic(context, sourceContext, targetContext);
}
private void copyElementsFromPublic(SessionContext context, ElementContext sourceContext,
ElementContext targetContext) {
Collection<RevertElementAction> revertElementActions =
evaluateRevertElementActions(context, sourceContext, targetContext);
revertElementActions.forEach(revertElementAction -> revertElementAction.run(context));
}
private Collection<RevertElementAction> evaluateRevertElementActions(SessionContext context,
ElementContext sourceContext,
ElementContext targetContext) {
Map<Id, Id> sourceElements = elementPublicStore.listIds(context, sourceContext);
Map<Id, Id> targetPublicElements = elementPublicStore.listIds(context, targetContext);
Collection<SynchronizationStateEntity> synchronizationStateEntities =
elementPrivateStore.listSynchronizationStates(context, targetContext);
Map<Id, Id> targetElements =
evaluateTargetElements(targetPublicElements, synchronizationStateEntities);
Collection<RevertElementAction> revertElementActions = new ArrayList<>();
sourceElements.entrySet().forEach(entry -> {
Id sourceElementId = entry.getKey();
Id sourceElementRevisionId = entry.getValue();
if (!targetElements.containsKey(sourceElementId)) {
revertElementActions
.add(new RevertElementAction(sourceContext, sourceElementId, commands[CREATE]));
} else if (!targetElements.get(sourceElementId).equals(sourceElementRevisionId)) {
revertElementActions
.add(new RevertElementAction(sourceContext, sourceElementId, commands[UPDATE]));
}
});
targetElements.entrySet().forEach(entry -> {
Id targetElementId = entry.getKey();
if (!sourceElements.containsKey(targetElementId)) {
revertElementActions
.add(new RevertElementAction(targetContext, targetElementId, commands[DELETE]));
}
});
return revertElementActions;
}
private Map<Id, Id> evaluateTargetElements(Map<Id, Id> targetPublicElements,
Collection<SynchronizationStateEntity> syncStates) {
Map<Id, Id> targetElements = new HashMap<>(targetPublicElements);
syncStates.stream()
.filter(SynchronizationStateEntity::isDirty)
.forEach(syncState -> targetElements.put(syncState.getId(), Id.ZERO));
return targetElements;
}
private static class RevertElementAction {
private ElementContext elementContext;
private Id elementId;
private ActionCommand command;
private RevertElementAction(ElementContext elementContext, Id elementId,
ActionCommand command) {
this.elementContext = elementContext;
this.elementId = elementId;
this.command = command;
}
public ElementContext getElementContext() {
return elementContext;
}
public Id getElementId() {
return elementId;
}
public void run(SessionContext context) {
command.run(context, elementContext, elementId);
}
}
private interface ActionCommand {
void run(SessionContext context, ElementContext elementContext, Id elementId);
}
private static int CREATE = 0;
private static int UPDATE = 1;
private static int DELETE = 2;
private ActionCommand[] commands = {new ActionCommand() {
@Override
public void run(SessionContext context, ElementContext elementContext, Id elementId) {
//create
Optional<ElementEntity> element = elementPublicStore.get(context, elementContext, elementId);
if (!element.isPresent()) {
throw getMissingElementException(elementContext, elementId);
}
elementPrivateStore.create(context, elementContext, element.get());
}
}, new ActionCommand() {
@Override
public void run(SessionContext context, ElementContext elementContext, Id elementId) {
//update
Optional<ElementEntity> element = elementPublicStore.get(context, elementContext, elementId);
if (!element.isPresent()) {
throw getMissingElementException(elementContext, elementId);
}
elementPrivateStore.update(context, elementContext, element.get());
}
}, new ActionCommand() {
@Override
public void run(SessionContext context, ElementContext elementContext, Id elementId) {
//delete
Optional<ElementEntity> element = elementPrivateStore.get(context, elementContext, elementId);
if (!element.isPresent()) {
return; // deleted by parent when hierarchy was deleted
}
elementPrivateStore.delete(context, elementContext, element.get());
}
}};
private RuntimeException getMissingElementException(ElementContext elementContext,
Id elementId) {
return new IllegalStateException(
String.format("Item Id %s, version Id %s, revision Id %s: Missing element with Id %s",
elementContext.getItemId().getValue(), elementContext.getVersionId().getValue(),
elementContext.getRevisionId().getValue(), elementId.getValue())
);
}
}
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