65 lines
2.5 KiB
C#
65 lines
2.5 KiB
C#
 
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace PrivaPub.Infrastructure.Backup
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{
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// What a backup holds (manifest.json at its root): enough to check it is whole, to restore it on this host only, and to
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// rebuild what Mongo had (each collection's indexes).
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public sealed class ArchiveManifest
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{
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public const int CurrentFormat = 1;
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public const string FileName = "manifest.json";
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public int Format { get; set; } = CurrentFormat;
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public string Kind { get; set; }//nightly, manual, pre-deploy, pre-restore, uploaded
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public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
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public string Host { get; set; }//BackendBaseAddress: URIs and media URLs are stored whole, so only this host can restore it
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public string AppCommit { get; set; }
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public string AppRef { get; set; }
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public string NewestMigration { get; set; }
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public int MigrationNumber { get; set; }
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public bool Consistent { get; set; }//read at one instant (a snapshot session on a replica set)
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public bool DbOnly { get; set; }//no media files, only their list (the deploy's, which can't link www-data's files)
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public List<CollectionEntry> Collections { get; set; } = [];
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public List<ExcludedEntry> Excluded { get; set; } = [];
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public MediaEntry Media { get; set; } = new();
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public sealed class CollectionEntry
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{
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public string Name { get; set; }
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public long Count { get; set; }
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public long Bytes { get; set; }
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public string Sha256 { get; set; }
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public List<string> Indexes { get; set; } = [];//each as canonical Extended JSON
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}
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public sealed class ExcludedEntry
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{
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public string Name { get; set; }
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public string Why { get; set; }
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}
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public sealed class MediaEntry
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{
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public int Files { get; set; }
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public long Bytes { get; set; }
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public int Missing { get; set; }
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public List<string> List { get; set; } = [];
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}
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static readonly JsonSerializerOptions Json = new() { WriteIndented = true, PropertyNamingPolicy = JsonNamingPolicy.CamelCase, DefaultIgnoreCondition = JsonIgnoreCondition.Never };
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public static ArchiveManifest Read(string directory)
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{
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var path = Path.Combine(directory, FileName);
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return File.Exists(path) ? JsonSerializer.Deserialize<ArchiveManifest>(File.ReadAllText(path), Json) : default;
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}
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public void Write(string directory)
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{
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using var file = new FileStream(Path.Combine(directory, FileName), FileMode.Create, FileAccess.Write);
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JsonSerializer.Serialize(file, this, Json);
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file.Flush(flushToDisk: true);
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}
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}
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}
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