/// <summary>
/// Gets a new <see cref="RedditQueryResult{T, K}"> that contains results from chronologically prior to the last value in the ValueList.
/// </summary>
/// <returns></returns>
public RedditQueryResult <T, K> GetNextPageOfResults()
{
if (!HasValue)
{
// This will return with HasValue == false
return(new RedditQueryResult <T, K>(_searchAgent, Query, null));
}
DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
var q = (T)Query.DeepClone();
// We need to +1 here so we don't miss any results.
// PushShift has a limit of items they will return, so there is a case
// where if the ValueList.Last() item isn't the last item to have that timestamp
// then we could unintentionally miss some items.
// For instance, say PushShift has 10 items that all share a timestamp.
// We make a request for say 25 items and get 20 that are not in the above 10 that share a timestamp,
// if we say 'give me everything before the timestamp of the last item in my list' we'll never see those last 5 items.
// However now we have a case where if the list of items that share a timestamp is >= the limit (-1)
// that PushShare will serve us, then we may get stuck on a page with this method...
// Will need to check if PushSharp has added better support for paging, at this time this seems to be the only way.
var targetDateTime = epoch.AddSeconds((ValueList.Last().CreatedUtc + 1));
q.BeforeDateTime = new BeforeParameter(targetDateTime);
return(_searchAgent.Search <T, K>(q));
}