public async Task <DonationMatrix> GetDonationMatrixAsync(Expression <Func <Donation, bool> > predicate, PriorityScope scope, CancellationToken cancellationToken = default)
{
var results = await Donations
.AsNoTracking()
.Where(d => d.RemovalId == null)
.Where(predicate)
.Select(d => new { d.DonatedAt.Year, d.DonatedAt.Month, d.CharacterId, d.CopperAmount })
.GroupBy(d => new { d.Year, d.Month, d.CharacterId })
.Select(g => new MonthDonations
{
CharacterId = g.Key.CharacterId,
Donated = g.Sum(d => d.CopperAmount),
Month = g.Key.Month,
Year = g.Key.Year,
})
.OrderBy(md => md.CharacterId)
.ThenBy(md => md.Year)
.ThenBy(md => md.Month)
.ToListAsync(cancellationToken);
return(new(results, scope));
}