public IEnumerable <IMonthHashAndCount> GetMonthHashAndCounts(IEnumerable <IContentIdentifier> contentIdentifiers)
{
return
(contentIdentifiers
.Where(x => !_contentIdentifierGenerator.IsSystemContent(x))
.GroupBy(x => _contentMonthProvider.GetContentMonth(x.ModifiedMoment))
.Select(x =>
new {
Month = x.Key,
HashAndCount =
_hashProvider.GetHashAndCount(
x.OrderBy(y => y.ModifiedMoment)
.ThenBy(y => y.Guid)
.Select(y => Encoding.Unicode.GetBytes(y.Hash))
),
LastModifiedMoment = x.Max(y => y.ModifiedMoment)
})
.OrderBy(x => x.Month)
.Select(x => _monthHashAndCountFactory(x.Month, x.HashAndCount.Hash, x.HashAndCount.Count, x.LastModifiedMoment)));
}
