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package com.eurodyn.qlack.fuse.aaa.service;
import com.eurodyn.qlack.fuse.aaa.criteria.UserGroupSearchCriteria;
import com.eurodyn.qlack.fuse.aaa.dto.UserGroupDTO;
import com.eurodyn.qlack.fuse.aaa.exception.InvalidGroupHierarchyException;
import com.eurodyn.qlack.fuse.aaa.mapper.UserGroupMapper;
import com.eurodyn.qlack.fuse.aaa.model.QUserGroup;
import com.eurodyn.qlack.fuse.aaa.model.User;
import com.eurodyn.qlack.fuse.aaa.model.UserGroup;
import com.eurodyn.qlack.fuse.aaa.repository.UserGroupRepository;
import com.eurodyn.qlack.fuse.aaa.repository.UserRepository;
import com.querydsl.core.BooleanBuilder;
import com.querydsl.core.types.Predicate;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
/**
* @author European Dynamics SA
*/
@Service
@Validated
@Transactional
public class UserGroupService {
// QueryDSL helpers.
private static QUserGroup qUserGroup = QUserGroup.userGroup;
// Repositories
private final UserGroupRepository userGroupRepository;
private final UserRepository userRepository;
// Mappers
private final UserGroupMapper userGroupMapper;
public UserGroupService(UserGroupRepository userGroupRepository,
UserRepository userRepository, UserGroupMapper userGroupMapper) {
this.userGroupRepository = userGroupRepository;
this.userRepository = userRepository;
this.userGroupMapper = userGroupMapper;
}
public String createGroup(UserGroupDTO userGroupDTO) {
UserGroup userGroup = userGroupMapper.mapToEntity(userGroupDTO);
if (userGroupDTO.getParentId() != null) {
userGroup
.setParent(userGroupRepository.fetchById(userGroupDTO.getParentId()));
}
userGroupRepository.save(userGroup);
return userGroup.getId();
}
public void updateGroup(UserGroupDTO userGroupDTO) {
UserGroup userGroup = userGroupRepository.fetchById(userGroupDTO.getId());
userGroupMapper.mapToExistingEntity(userGroupDTO, userGroup);
}
public void deleteGroup(String groupID) {
userGroupRepository.delete(userGroupRepository.fetchById(groupID));
}
public void moveGroup(String groupID, String newParentId) {
UserGroup userGroup = userGroupRepository.fetchById(groupID);
UserGroup newParent = userGroupRepository.fetchById(newParentId);
// Check the moving the userGroup under the new parent will not
// create a cyclic dependency.
UserGroup checkedUserGroup = newParent;
while (checkedUserGroup != null) {
if (checkedUserGroup.getId().equals(userGroup.getId())) {
throw new InvalidGroupHierarchyException(
"Cannot move userGroup with ID " + groupID
+ " under userGroup with ID " + newParentId
+ " since this will create a cyclic dependency between userGroups.");
}
checkedUserGroup = checkedUserGroup.getParent();
}
userGroup.setParent(newParent);
}
public UserGroupDTO getGroupByID(String groupID, boolean lazyRelatives) {
return userGroupMapper
.mapToDTO(userGroupRepository.fetchById(groupID), lazyRelatives);
}
public List getGroupsByID(Collection groupIds,
boolean lazyRelatives) {
Predicate predicate = qUserGroup.id.in(groupIds);
return userGroupMapper.mapToDTO(
userGroupRepository.findAll(predicate, Sort.by("name").ascending()),
lazyRelatives);
}
public UserGroupDTO getGroupByName(String groupName, boolean lazyRelatives) {
return userGroupMapper.mapToDTO(
userGroupRepository.findByName(groupName), lazyRelatives);
}
public List getGroupByNames(List groupNames,
boolean lazyRelatives) {
Predicate predicate = qUserGroup.name.in(groupNames);
return userGroupMapper
.mapToDTO(userGroupRepository.findAll(predicate), lazyRelatives);
}
public UserGroupDTO getGroupByObjectId(String objectId,
boolean lazyRelatives) {
return userGroupMapper.mapToDTO(
userGroupRepository.findByObjectId(objectId), lazyRelatives);
}
public List listGroups() {
return userGroupMapper.mapToDTO(
userGroupRepository.findAll(Sort.by("name").ascending()), false);
}
public List listGroupsAsTree() {
Predicate predicate = qUserGroup.parent.isNull();
return userGroupMapper.mapToDTO(userGroupRepository.findAll(
predicate, Sort.by("name").ascending()), false);
}
public UserGroupDTO getGroupParent(String groupID) {
UserGroup userGroup = userGroupRepository.fetchById(groupID);
return userGroupMapper.mapToDTO(userGroup.getParent(), false);
}
public List getGroupChildren(String groupID) {
Predicate predicate;
if (groupID == null) {
predicate = qUserGroup.parent.isNull();
} else {
predicate = qUserGroup.parent.id.eq(groupID);
}
return userGroupMapper.mapToDTO(userGroupRepository.findAll(
predicate, Sort.by("name").ascending()), false);
}
/**
* Returns the users belonging to a given userGroup and (optionally) its
* hierarchy
*
* @param userGroup The userGroup the users of which to retrieve
* @param includeAncestors true if users belonging to ancestors of this
* userGroup (the userGroup's parent and its parent's parent, etc.) should
* be retrieved
* @param includeDescendants true if users belonging to descendants of this
* userGroup (the userGroup's children and its children's children, etc.)
* should be retrieved
* @return The IDs of the users belonging to the specified userGroup
* hierarchy.
*/
private Set getGroupHierarchyUsersIds(UserGroup userGroup,
boolean includeAncestors,
boolean includeDescendants) {
Set retVal = new HashSet<>(userGroup.getUsers().size());
for (User user : userGroup.getUsers()) {
retVal.add(user.getId());
}
// If children userGroup users should be included iterate over them
// (and their children recursively) and add their users to
// the return value. Same for the userGroup parents.
if (includeDescendants) {
for (UserGroup child : userGroup.getChildren()) {
retVal.addAll(getGroupHierarchyUsersIds(child, false, true));
}
}
if ((includeAncestors) && (userGroup.getParent() != null)) {
retVal
.addAll(getGroupHierarchyUsersIds(userGroup.getParent(), true, false));
}
return retVal;
}
private void addUsers(Collection userIDs, UserGroup userGroup) {
for (String userID : userIDs) {
User user = userRepository.fetchById(userID);
if (userGroup.getUsers() == null) {
userGroup.setUsers(new ArrayList());
}
if (!userGroup.getUsers().contains(user)) {
userGroup.getUsers().add(user);
}
if (user.getUserGroups() == null) {
user.setUserGroups(new ArrayList());
}
if (!user.getUserGroups().contains(userGroup)) {
user.getUserGroups().add(userGroup);
}
}
}
public void addUser(String userID, String groupId) {
List userIds = new ArrayList<>(1);
userIds.add(userID);
addUsers(userIds, groupId);
}
public void addUsers(Collection userIDs, String groupID) {
addUsers(userIDs, userGroupRepository.fetchById(groupID));
}
public void addUserByGroupName(String userId, String groupName) {
List userIds = new ArrayList<>(1);
userIds.add(userId);
addUsersByGroupName(userIds, groupName);
}
public void addUsersByGroupName(Collection userIDs,
String groupName) {
addUsers(userIDs, userGroupRepository.findByName(groupName));
}
public void removeUser(String userID, String groupID) {
List userIds = new ArrayList<>(1);
userIds.add(userID);
removeUsers(userIds, groupID);
}
public void removeUsers(Collection userIDs, String groupID) {
UserGroup userGroup = userGroupRepository.fetchById(groupID);
for (String userID : userIDs) {
User user = userRepository.fetchById(userID);
userGroup.getUsers().remove(user);
}
}
public Set getGroupUsersIds(String groupID, boolean includeChildren) {
UserGroup userGroup = userGroupRepository.fetchById(groupID);
return getGroupHierarchyUsersIds(userGroup, false, includeChildren);
}
public Set getUserGroupsIds(String userID) {
User user = userRepository.fetchById(userID);
Set retVal = new HashSet<>();
if (user.getUserGroups() != null) {
for (UserGroup userGroup : user.getUserGroups()) {
retVal.add(userGroup.getId());
}
}
return retVal;
}
/**
* Retrieves the names of the users who are members of specific groups
*
* @param groupIDs The ids of the groups whose members to retrieve
* @return The names of the retrieved users
*/
public Set getGroupUsersNames(Collection groupIDs) {
List groups = userGroupRepository.findByIdIn(groupIDs);
Set users = groups.stream().flatMap(g -> g.getUsers().stream())
.collect(Collectors.toSet());
return users.stream().map(User::getUsername).collect(Collectors.toSet());
}
/**
* Retrieves Groups
*
* @param criteria the criteria that is specified to search for a group
* @return a list of Groups
*/
public Iterable findGroups(UserGroupSearchCriteria criteria) {
Predicate predicate = buildPredicate(criteria);
if (criteria.getPageable() != null) {
return findAll(predicate, criteria.getPageable());
} else {
return listGroups(predicate);
}
}
/**
* Finds all the groups based on predicate and pagination parameters.
*
* @param predicate the Boolean typed expressions to search for.
* @param pageable the pagination information.
* @return the responded DTO in page form, useful information for pagination and sorting.
*/
public Page findAll(Predicate predicate, Pageable pageable) {
return userGroupMapper.map(userGroupRepository.findAll(predicate, pageable));
}
private Predicate buildPredicate(UserGroupSearchCriteria criteria) {
Predicate predicate = new BooleanBuilder();
if (criteria.getNameLike() != null){
predicate = ((BooleanBuilder) predicate)
.and(qUserGroup.name.like(criteria.getNameLike()));
}
if (criteria.getName() != null) {
predicate = ((BooleanBuilder) predicate)
.and(qUserGroup.name.eq(criteria.getName()));
}
if (criteria.getIncludeIds() != null) {
predicate = ((BooleanBuilder) predicate)
.and(qUserGroup.id.in(criteria.getIncludeIds()));
}
if (criteria.getExcludeIds() != null) {
predicate = ((BooleanBuilder) predicate)
.and(qUserGroup.id.notIn(criteria.getExcludeIds()));
}
return predicate;
}
private List listGroups(Predicate predicate) {
return userGroupRepository.findAll(predicate).stream()
.map(o -> userGroupMapper.mapToDTO(o, false))
.collect(Collectors.toList());
}
}
