/// <summary>
/// Gets the communication list members.
/// </summary>
/// <param name="rockContext">The rock context.</param>
/// <param name="listGroupId">The list group identifier.</param>
/// <param name="segmentCriteria">The segment criteria.</param>
/// <param name="segmentDataViewIds">The segment data view ids.</param>
/// <returns></returns>
public static IQueryable <GroupMember> GetCommunicationListMembers(RockContext rockContext, int?listGroupId, SegmentCriteria segmentCriteria, List <int> segmentDataViewIds)
{
IQueryable <GroupMember> groupMemberQuery = null;
if (listGroupId.HasValue)
{
var groupMemberService = new GroupMemberService(rockContext);
var personService = new PersonService(rockContext);
var dataViewService = new DataViewService(rockContext);
groupMemberQuery = groupMemberService.Queryable().Where(a => a.GroupId == listGroupId.Value && a.GroupMemberStatus == GroupMemberStatus.Active);
Expression segmentExpression = null;
ParameterExpression paramExpression = personService.ParameterExpression;
var segmentDataViewList = dataViewService.GetByIds(segmentDataViewIds).AsNoTracking().ToList();
foreach (var segmentDataView in segmentDataViewList)
{
List <string> errorMessages;
var exp = segmentDataView.GetExpression(personService, paramExpression, out errorMessages);
if (exp != null)
{
if (segmentExpression == null)
{
segmentExpression = exp;
}
else
{
if (segmentCriteria == SegmentCriteria.All)
{
segmentExpression = Expression.AndAlso(segmentExpression, exp);
}
else
{
segmentExpression = Expression.OrElse(segmentExpression, exp);
}
}
}
}
if (segmentExpression != null)
{
var personQry = personService.Get(paramExpression, segmentExpression);
groupMemberQuery = groupMemberQuery.Where(a => personQry.Any(p => p.Id == a.PersonId));
}
}
return(groupMemberQuery);
}