57 lines
1.6 KiB
C#
57 lines
1.6 KiB
C#
using Newtonsoft.Json;
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using VoidCat.Model;
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using VoidCat.Model.Exceptions;
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using VoidCat.Services.Abstractions;
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namespace VoidCat.Services;
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public class LocalDiskFileMetadataStore : IFileMetadataStore
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{
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private const string MetadataDir = "metadata";
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private readonly VoidSettings _settings;
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public LocalDiskFileMetadataStore(VoidSettings settings)
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{
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_settings = settings;
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var metaPath = Path.Combine(_settings.DataDirectory, MetadataDir);
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if (!Directory.Exists(metaPath))
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{
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Directory.CreateDirectory(metaPath);
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}
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}
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public async ValueTask<InternalVoidFile?> Get(Guid id)
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{
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var path = MapMeta(id);
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if (!File.Exists(path)) return default;
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var json = await File.ReadAllTextAsync(path);
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return JsonConvert.DeserializeObject<InternalVoidFile>(json);
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}
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public async ValueTask Set(InternalVoidFile meta)
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{
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var path = MapMeta(meta.Id);
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var json = JsonConvert.SerializeObject(meta);
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await File.WriteAllTextAsync(path, json);
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}
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public async ValueTask Update(VoidFile patch, Guid editSecret)
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{
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var oldMeta = await Get(patch.Id);
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if (oldMeta?.EditSecret != editSecret)
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{
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throw new VoidNotAllowedException("Edit secret incorrect");
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}
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// only patch metadata
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oldMeta.Metadata = patch.Metadata;
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await Set(oldMeta);
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}
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private string MapMeta(Guid id) =>
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Path.ChangeExtension(Path.Join(_settings.DataDirectory, MetadataDir, id.ToString()), ".json");
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}
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