PersistedHash.cs

using System;
using Waher.Persistence.Attributes;
 
namespace Waher.Runtime.HashStore.HashObjects
{
    [CollectionName("PersistedHashes")]
    [TypeName(TypeNameSerialization.None)]
    [Index("Realm", "Hash")]
    [Index("ExpiresUtc")]
    [ArchivingTime(nameof(ArchiveDays))]
    public class PersistedHash
    {
        public PersistedHash()
        {
        }
 
        [ObjectId]
        public string ObjectId { get; set; }
 
        public DateTime ExpiresUtc { get; set; }
 
        public string Realm { get; set; }
 
        public byte[] Hash { get; set; }
 
        [DefaultValueNull]
        public object AssociatedObject { get; set; }
 
        public int ArchiveDays
        {
            get
            {
                if (this.ExpiresUtc.Year >= 9999)
                    return int.MaxValue;
 
                TimeSpan Span = this.ExpiresUtc - DateTime.UtcNow;
                double Days = Math.Ceiling(Span.TotalDays);
 
                if (Days < 0)
                    return 0;
                else if (Days > int.MaxValue)
                    return int.MaxValue;
                else
                    return (int)Days;
            }
        }
    }
}