public TryOptionAsync <IEnumerable <Employee> > Execute(EmployeesQuery query, CancellationToken token = default)
{
var(count, email, firstName, lastName) = query;
var dataQuery = client
.EmployeesQueryable <EmployeeRecord>()
.Where(e => e.Type == nameof(EmployeeRecord));
if (!string.IsNullOrWhiteSpace(firstName))
{
dataQuery = dataQuery.Where(e => e.FirstNameLower.Contains(firstName.ToLowerInvariant()));
}
if (!string.IsNullOrWhiteSpace(lastName))
{
dataQuery = dataQuery.Where(e => e.LastNameLower.Contains(lastName.ToLowerInvariant()));
}
if (!string.IsNullOrWhiteSpace(email))
{
dataQuery = dataQuery.Where(e => e.EmailLower.Contains(email.ToLowerInvariant()));
}
if (count > 0)
{
dataQuery = dataQuery.Take(count);
}
return(async() =>
{
var iterator = dataQuery.ToFeedIterator();
var employees = new List <Employee>();
while (iterator.HasMoreResults)
{
foreach (var result in await iterator.ReadNextAsync(token))
{
employees.Add(EmployeeRecord.Map.ToEmployee(result));
}
}
return Some(employees.AsEnumerable());
});
}