public void Delete(int id)
{
TriggerDeleteEvent(id);
// get all groups where this user is the only admin
// delete all returned groups that only have this user as the member
var groups = _relationshipController.GetRelatedActors(id, ActorType.Group);
groups.ForEach(g => _groupController.RemoveMember(g.Id, id));
_userController.Delete(id);
_logger.LogInformation($"{id}");
}
/// <summary>
/// Cleanly remove a group member. If it is the admin, admin will be delegated to another member.
/// If the only member, the group will be deleted.
/// </summary>
/// <param name="groupId"></param>
/// <param name="memberId"></param>
public void RemoveMember(int groupId, int memberId)
{
var members = _relationshipController.GetRelatedActors(groupId, ActorType.User, ActorVisibilityFilter.All);
if (members.All(m => m.Id != memberId))
{
throw new InvalidRelationshipException($"The actor with id {memberId} is not a member of the group: {groupId}.");
}
var relationship = _relationshipController.GetRelationship(groupId, memberId);
if (members.Count == 1)
{
_relationshipController.Delete(relationship);
Delete(groupId);
}
else
{
var groupControllers = members
.Where(m => IsGroupController(m.Id, groupId))
.ToList();
// If this is the only group controller, assign control to another member
if (groupControllers.Count == 1 && groupControllers.Any(gc => gc.Id == memberId))
{
_relationshipController.Delete(relationship);
var relationships = _relationshipController.GetRelationships(groupId, ActorType.User);
var newControllerRelationship = relationships.First();
var newControllerId = newControllerRelationship.AcceptorId != groupId
? newControllerRelationship.AcceptorId
: newControllerRelationship.RequestorId;
AssignController(newControllerId, groupId);
}
else
{
_relationshipController.Delete(relationship);
}
}
}
