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