using System.Collections.Generic;
using FluentValidation;
using MfGames.Gallium;
using NodaTime;
namespace MfGames.Nitride.Temporal;
/// <summary>
/// Filters out all expired entities that are before the expiration.
/// </summary>
[WithProperties]
public partial class FilterOutExpiredInstant : OperationBase
{
private readonly IValidator<FilterOutExpiredInstant> validator;
public FilterOutExpiredInstant(
IValidator<FilterOutExpiredInstant> validator,
Timekeeper clock)
this.validator = validator;
this.Timekeeper = clock;
}
public Timekeeper Timekeeper { get; set; }
/// <inheritdoc />
public override IEnumerable<Entity> Run(IEnumerable<Entity> input)
this.validator.ValidateAndThrow(this);
if (!this.Timekeeper.Expiration.HasValue)
return input;
return input.SelectEntity<Instant, CanExpire>(this.IsNotExpired);
private Entity? IsNotExpired(
Entity entity,
Instant instant,
CanExpire _)
Instant expiration = this.Timekeeper.Expiration!.Value;
bool isExpired = instant.CompareTo(expiration) < 0;
return isExpired ? null : entity;