public async Task <IEnumerable <DomainItemSignal> > GetItemLikesSequenceAsync(string space, string itemId, int pageSize)
{
// Building composite itemId to isolated different spaces of statistics
itemId = BuildGlobalId(space, itemId);
IEnumerable <ItemSignalsEntity> antiResults = await _itemSignalsRepository.GetAntiSequenceAsync(itemId, SignalType.Like, pageSize);
IEnumerable <ItemSignalsEntity> results = await _itemSignalsRepository.GetSequenceAsync(itemId, SignalType.Like, pageSize);
// Filter cancelled signals
ILookup <string, ItemSignalsEntity> filter = antiResults.ToLookup(i => i.UserId);
results = results.Where(r => !filter.Contains(r.UserId) || filter[r.UserId].All(i => i.DateTime < r.DateTime));
// Project results
return(results.Select(s => _mapper.Map <ItemSignalsEntity, DomainItemSignal>(s)));
}
