/*
* Copyright (c) 2010-2011 Lockheed Martin Corporation
*
* 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.
*/
package org.eurekastreams.server.action.execution.stream;
import java.util.List;
import org.eurekastreams.commons.actions.InlineExecutionStrategyWrappingExecutor;
import org.eurekastreams.commons.actions.TaskHandlerExecutionStrategy;
import org.eurekastreams.commons.actions.context.PrincipalActionContext;
import org.eurekastreams.commons.actions.context.TaskHandlerActionContext;
import org.eurekastreams.commons.server.UserActionRequest;
import org.eurekastreams.server.action.request.DeleteFromSearchIndexRequest;
import org.eurekastreams.server.action.request.UpdateStickyActivityRequest;
import org.eurekastreams.server.action.request.stream.DeleteActivityCacheUpdateRequest;
import org.eurekastreams.server.domain.EntityType;
import org.eurekastreams.server.domain.stream.Activity;
import org.eurekastreams.server.domain.stream.ActivityDTO;
import org.eurekastreams.server.persistence.mappers.DomainMapper;
import org.eurekastreams.server.persistence.mappers.requests.DeleteActivityRequest;
import org.eurekastreams.server.persistence.mappers.stream.DeleteActivity;
import org.eurekastreams.server.persistence.mappers.stream.GetPersonIdsWithStarredActivity;
import org.eurekastreams.server.search.modelview.DomainGroupModelView;
/**
* Delete activity action.
*
*/
public class DeleteActivityExecution implements TaskHandlerExecutionStrategy<PrincipalActionContext>
{
/**
* Delete activity DAO.
*/
private final DeleteActivity deleteActivityDAO;
/**
* DAO for finding comment ids.
*/
private final DomainMapper<Long, List<Long>> commentIdsByActivityIdDAO;
/**
* DAO for getting person Ids for users that have deleted activity starred.
*/
private final GetPersonIdsWithStarredActivity getPersonIdsWithStarredActivityDAO;
/** For getting the group for clearing sticky activities. */
private final DomainMapper<Long, DomainGroupModelView> groupMapper;
/** For clearing a group's sticky activity. */
private final InlineExecutionStrategyWrappingExecutor clearGroupStickyActivityExecutor;
/**
* Constructor.
*
* @param inDeleteActivityDAO
* The DeleteAction DAO.
* @param inCommentIdsByActivityIdDAO
* commments by activity id DAO.
* @param inGetPersonIdsWithStarredActivityDAO
* persons with starred Activity DAO.
* @param inGroupMapper
* For getting the group for clearing sticky activities.
* @param inClearGroupStickyActivityExecutor
* For clearing a group's sticky activity.
*/
public DeleteActivityExecution(final DeleteActivity inDeleteActivityDAO,
final DomainMapper<Long, List<Long>> inCommentIdsByActivityIdDAO,
final GetPersonIdsWithStarredActivity inGetPersonIdsWithStarredActivityDAO,
final DomainMapper<Long, DomainGroupModelView> inGroupMapper,
final InlineExecutionStrategyWrappingExecutor inClearGroupStickyActivityExecutor)
{
deleteActivityDAO = inDeleteActivityDAO;
commentIdsByActivityIdDAO = inCommentIdsByActivityIdDAO;
getPersonIdsWithStarredActivityDAO = inGetPersonIdsWithStarredActivityDAO;
groupMapper = inGroupMapper;
clearGroupStickyActivityExecutor = inClearGroupStickyActivityExecutor;
}
/**
* Deletes the activity specified.
*
* @param inActionContext
* {@link PrincipalActionContext}.
* @return True if successful.
*/
@Override
public Boolean execute(final TaskHandlerActionContext<PrincipalActionContext> inActionContext)
{
Long activityId = (Long) inActionContext.getActionContext().getParams();
Long currentUserId = inActionContext.getActionContext().getPrincipal().getId();
// get all comment ids for this activity before removal from DB.
List<Long> commentIds = commentIdsByActivityIdDAO.execute(activityId);
// get people who have this activity starred before removal from DB.
List<Long> personIdsWithActivityStarred = getPersonIdsWithStarredActivityDAO.execute(activityId);
// delete activity/comments/stars from DB and update current user's views.
ActivityDTO activity = deleteActivityDAO.execute(new DeleteActivityRequest(currentUserId, activityId));
// action has already been deleted or was never present, short-circuit here.
if (activity == null)
{
return Boolean.TRUE;
}
// if this activity was sticky, reset the stream's sticky activity
if (activity.getDestinationStream().getEntityType() == EntityType.GROUP)
{
DomainGroupModelView group = groupMapper.execute(activity.getDestinationStream().getDestinationEntityId());
if (group != null && activityId.equals(group.getStickyActivityId()))
{
clearGroupStickyActivityExecutor.execute(inActionContext,
new UpdateStickyActivityRequest(group.getId(), null));
}
}
// submit request for additional cache updates due to activity deletion.
inActionContext.getUserActionRequests().add(
new UserActionRequest("deleteActivityCacheUpdate", null, new DeleteActivityCacheUpdateRequest(
activity, commentIds, personIdsWithActivityStarred)));
// Put an action on the queue to delete the activity from search index.
inActionContext.getUserActionRequests().add(
new UserActionRequest("deleteFromSearchIndexAction", null, new DeleteFromSearchIndexRequest(
Activity.class, activityId)));
return Boolean.TRUE;
}
}