140 lines
3.8 KiB
C#
140 lines
3.8 KiB
C#
using Amazon.S3;
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using Newtonsoft.Json;
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using VoidCat.Model;
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using VoidCat.Services.Abstractions;
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using File = VoidCat.Database.File;
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namespace VoidCat.Services.Files;
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/// <inheritdoc />
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public class S3FileMetadataStore : IFileMetadataStore
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{
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private readonly ILogger<S3FileMetadataStore> _logger;
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private readonly AmazonS3Client _client;
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private readonly S3BlobConfig _config;
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public S3FileMetadataStore(S3BlobConfig settings, ILogger<S3FileMetadataStore> logger)
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{
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_logger = logger;
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_config = settings;
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_client = _config.CreateClient();
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}
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public string? Key => _config.Name;
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/// <inheritdoc />
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public async ValueTask<Database.File?> Get(Guid id)
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{
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try
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{
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var obj = await _client.GetObjectAsync(_config.BucketName, ToKey(id));
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using var sr = new StreamReader(obj.ResponseStream);
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var json = await sr.ReadToEndAsync();
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var ret = JsonConvert.DeserializeObject<Database.File>(json);
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return ret;
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}
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catch (AmazonS3Exception aex)
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{
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_logger.LogError(aex, "Failed to get metadata for {Id}, {Error}", id, aex.Message);
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}
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return default;
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}
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public ValueTask<File?> GetHash(string digest)
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{
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throw new NotImplementedException();
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}
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/// <inheritdoc />
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public async ValueTask<IReadOnlyList<Database.File>> Get(Guid[] ids)
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{
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var ret = new List<Database.File>();
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foreach (var id in ids)
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{
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var r = await Get(id);
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if (r != null)
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{
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ret.Add(r);
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}
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}
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return ret;
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}
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public ValueTask Add(Database.File f)
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{
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return Set(f.Id, f);
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}
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/// <inheritdoc />
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public async ValueTask Update(Guid id, Database.File meta)
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{
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var oldMeta = await Get(id);
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if (oldMeta == default) return;
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oldMeta.Patch(meta);
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await Set(id, oldMeta);
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}
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/// <inheritdoc />
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public ValueTask<PagedResult<Database.File>> ListFiles(PagedRequest request)
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{
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async IAsyncEnumerable<Database.File> Enumerate()
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{
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var obj = await _client.ListObjectsV2Async(new()
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{
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BucketName = _config.BucketName,
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Prefix = "metadata_",
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MaxKeys = 5_000
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});
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foreach (var file in obj.S3Objects)
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{
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if (Guid.TryParse(file.Key.Split("metadata_")[1], out var id))
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{
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var meta = await Get(id);
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if (meta != default)
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{
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yield return meta;
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}
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}
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}
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}
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return ValueTask.FromResult(new PagedResult<Database.File>
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{
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Page = request.Page,
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PageSize = request.PageSize,
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Data = Enumerate().Skip(request.PageSize * request.Page).Take(request.PageSize)
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});
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}
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/// <inheritdoc />
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public async ValueTask<IFileMetadataStore.StoreStats> Stats()
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{
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var files = await ListFiles(new(0, Int32.MaxValue));
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var count = await files.Data.CountAsync();
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var size = await files.Data.SumAsync(a => (long) a.Size);
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return new(count, (ulong) size);
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}
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/// <inheritdoc />
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public async ValueTask Delete(Guid id)
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{
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await _client.DeleteObjectAsync(_config.BucketName, ToKey(id));
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}
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private async ValueTask Set(Guid id, Database.File meta)
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{
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await _client.PutObjectAsync(new()
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{
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BucketName = _config.BucketName,
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Key = ToKey(id),
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ContentBody = JsonConvert.SerializeObject(meta),
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ContentType = "application/json"
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});
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}
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private static string ToKey(Guid id) => $"metadata_{id}";
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} |