62 lines
2.8 KiB
C#
62 lines
2.8 KiB
C#
 
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using MongoDB.Entities;
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namespace PrivaPub.Infrastructure.Backup
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{
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// What a restore did (or why it was abandoned), kept for the administrator's page and for the followers' grace: for
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// FollowersGrace after a restore the followers' digests (FEP-8fcf) are neither sent nor acted on to undo a follow, since
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// what the restore lost of either side is not the other's fault.
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public class RestoreRecord : Entity
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{
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public static readonly TimeSpan FollowersGrace = TimeSpan.FromDays(14);
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public string Backup { get; set; }
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public DateTime BackupCreatedAt { get; set; }
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public string PreRestore { get; set; }
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public string RequestedBy { get; set; }
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public DateTime RequestedAt { get; set; }
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public DateTime RestoredAt { get; set; } = DateTime.UtcNow;
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public int Attempts { get; set; }
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public bool Abandoned { get; set; }//nothing was changed: the server booted as it was
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public string Error { get; set; }
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public RestoreReport Report { get; set; } = new();
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static (DateTime Until, DateTime Read) _grace;
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/// <summary>Whether a restore ended less than FollowersGrace ago (read at most once a minute).</summary>
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public static async Task<bool> InFollowersGrace(CancellationToken token)
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{
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var now = DateTime.UtcNow;
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var cached = _grace;
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if (now - cached.Read > TimeSpan.FromMinutes(1))
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{
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var last = await DB.Default.Find<RestoreRecord>().Match(r => !r.Abandoned).Sort(r => r.RestoredAt, Order.Descending).ExecuteFirstAsync(token);
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cached = (last == default ? DateTime.MinValue : last.RestoredAt + FollowersGrace, now);
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_grace = cached;
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}
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return now < cached.Until;
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}
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/// <summary>Forgets what was read, so a restore made in this process counts at once.</summary>
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public static void Forget() => _grace = default;
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}
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public class RestoreReport
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{
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public int Collections { get; set; }
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public long Documents { get; set; }
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public int CollectionsDropped { get; set; }//live collections the backup had no documents in
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public int MediaRestored { get; set; }//files the live directory lacked, brought back
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public int MediaMissing { get; set; }
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public int RootsDeleted { get; set; }//deleted since the backup, deleted again
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public int PersonasDeleted { get; set; }
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public int GroupsDeleted { get; set; }
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public int PostsDeleted { get; set; }
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public List<string> RootsTombstoned { get; set; } = [];//made after the backup: deleted, their names kept
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public List<string> PersonasTombstoned { get; set; } = [];
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public List<string> GroupsTombstoned { get; set; } = [];
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public int PostsGone { get; set; }//local posts made after the backup: 410 from now on
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public int MediaTrashed { get; set; }
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public int ProtectiveKept { get; set; }//blocks, mutes, domain blocks, reserved names, reports, filters, deletions kept from since
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public int SessionsEnded { get; set; }
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}
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}
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