/*
* 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.persistence.mappers;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.eurekastreams.commons.logging.LogFactory;
import org.eurekastreams.server.action.request.SharedResourceRequest;
import org.eurekastreams.server.search.modelview.PersonModelView;
import org.eurekastreams.server.search.modelview.SharedResourceDTO;
/**
* Mapper to get the properties of a shared resource, including shared and liked counts and 4 people from each list.
* This combines a few mappers.
*/
public class GetSharedResourcePropertiesMapper extends BaseArgDomainMapper<SharedResourceRequest, SharedResourceDTO>
{
/**
* Logger.
*/
private Log log = LogFactory.make();
/**
* Mapper to get a stream scope id by scope type and unique key.
*/
private DomainMapper<String, Long> getResourceStreamScopeIdByKeyMapper;
/**
* Mapper that gets the ids of people that liked a shared resource.
*/
private DomainMapper<SharedResourceRequest, List<Long>> getPeopleThatSharedResourceMapper;
/**
* Mapper that gets the ids of people that shared a shared resource.
*/
private DomainMapper<SharedResourceRequest, List<Long>> getPeopleThatLikedResourceMapper;
/**
* Mapper to get person model views by ids.
*/
private DomainMapper<List<Long>, List<PersonModelView>> getPeopleModelViewsByIdsMapper;
/**
* Constructor.
*
* @param inGetResourceStreamScopeIdByKeyMapper
* Mapper to get a stream scope id by scope type and unique key.
* @param inGetPeopleThatSharedResourceMapper
* Mapper that gets the ids of people that liked a shared resource.
* @param inGetPeopleThatLikedResourceMapper
* Mapper that gets the ids of people that shared a shared resource.
* @param inGetPeopleModelViewsByIdsMapper
* mapper to get person model views
*/
public GetSharedResourcePropertiesMapper(final DomainMapper<String, Long> inGetResourceStreamScopeIdByKeyMapper,
final DomainMapper<SharedResourceRequest, List<Long>> inGetPeopleThatSharedResourceMapper,
final DomainMapper<SharedResourceRequest, List<Long>> inGetPeopleThatLikedResourceMapper,
final DomainMapper<List<Long>, List<PersonModelView>> inGetPeopleModelViewsByIdsMapper)
{
getResourceStreamScopeIdByKeyMapper = inGetResourceStreamScopeIdByKeyMapper;
getPeopleThatSharedResourceMapper = inGetPeopleThatSharedResourceMapper;
getPeopleThatLikedResourceMapper = inGetPeopleThatLikedResourceMapper;
getPeopleModelViewsByIdsMapper = inGetPeopleModelViewsByIdsMapper;
}
/**
* Return the SharedResourceDTO from the input request.
*
* @param inRequest
* the request
* @return the shared resource dto
*/
@Override
public SharedResourceDTO execute(final SharedResourceRequest inRequest)
{
SharedResourceDTO dto = new SharedResourceDTO();
dto.setKey(inRequest.getUniqueKey());
dto.setSharersSample(new ArrayList<PersonModelView>());
dto.setLikersSample(new ArrayList<PersonModelView>());
// either null or a stream scope id
Long streamScopeId = getResourceStreamScopeIdByKeyMapper.execute(inRequest.getUniqueKey());
dto.setStreamScopeId(streamScopeId);
// if the stream scope doesn't exist, then this resource doesn't either
if (streamScopeId == null)
{
// not found - if the shared resource existed, it would have a stream scope, so we can stop looking through
// the other tables now
dto.setIsLiked(false);
dto.setLikeCount(0);
dto.setShareCount(0);
return dto;
}
List<Long> sharedPersonIds = getPeopleThatSharedResourceMapper.execute(inRequest);
List<Long> likedPersonIds = getPeopleThatLikedResourceMapper.execute(inRequest);
// need to check if the current user liked this before trimming the list
dto.setIsLiked(likedPersonIds.contains(inRequest.getPersonId()));
dto.setLikeCount(likedPersonIds.size());
dto.setShareCount(sharedPersonIds.size());
log.info("Getting shared and liked people lists for shared resource with key: " + inRequest.getUniqueKey());
if (sharedPersonIds.size() > 4)
{
sharedPersonIds = sharedPersonIds.subList(0, 4);
}
if (likedPersonIds.size() > 4)
{
likedPersonIds = likedPersonIds.subList(0, 4);
}
// get the people
List<Long> personIds = new ArrayList<Long>();
personIds.addAll(sharedPersonIds);
for (long id : likedPersonIds)
{
if (!personIds.contains(id))
{
personIds.add(id);
}
}
if (personIds.size() > 0)
{
List<PersonModelView> people = getPeopleModelViewsByIdsMapper.execute(personIds);
PersonModelView foundPerson;
for (long personId : personIds)
{
foundPerson = findPersonInList(people, personId);
if (foundPerson != null)
{
// add the DTO to the people collections
if (likedPersonIds.contains(personId))
{
dto.getLikersSample().add(foundPerson);
}
if (sharedPersonIds.contains(personId))
{
dto.getSharersSample().add(foundPerson);
}
}
}
}
return dto;
}
/**
* Get a person by id from a list of PersonModelViews.
*
* @param inPeople
* the people to look through
* @param personId
* the person id we're looking for
* @return the person with the input id in the list of person model views
*/
private PersonModelView findPersonInList(final List<PersonModelView> inPeople, final Long personId)
{
for (PersonModelView p : inPeople)
{
if (p.getId() == personId)
{
return p;
}
}
return null;
}
}