62 lines
2.2 KiB
C#
62 lines
2.2 KiB
C#
using Microsoft.Extensions.Logging;
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namespace SVSim.EmulatedEntrypoint.Services;
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/// <summary>
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/// Reads the static card-master blob from the app's output directory once at startup and
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/// hands the cached base64 string to <c>ImmutableDataController</c>. Singleton because the
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/// file is ~1.27 MB and gzip-decoding it on every request would burn CPU for no benefit.
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/// </summary>
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public interface ICardMasterPayloadProvider
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{
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/// <summary>True when the blob loaded successfully and serving is enabled.</summary>
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bool IsAvailable { get; }
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/// <summary>The verbatim base64 string ready for <c>data.card_master</c>.</summary>
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string Base64Blob { get; }
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}
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public sealed class CardMasterPayloadProvider : ICardMasterPayloadProvider
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{
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// Filename is pinned to the captured snapshot's date. When swapping the blob, update
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// this constant AND the hash in CardMasterConfig in the same change.
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private const string BlobFileName = "card_master_2026-06-03.txt";
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public bool IsAvailable { get; }
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public string Base64Blob { get; }
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public CardMasterPayloadProvider(ILogger<CardMasterPayloadProvider> log)
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{
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var path = Path.Combine(AppContext.BaseDirectory, "Data", BlobFileName);
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if (!File.Exists(path))
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{
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log.LogWarning("Card-master blob missing at {Path} — /immutable_data/card_master will 503.", path);
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Base64Blob = "";
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IsAvailable = false;
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return;
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}
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string content;
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try
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{
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content = File.ReadAllText(path).Trim();
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}
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catch (IOException ex)
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{
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log.LogError(ex, "Failed reading card-master blob at {Path} — /immutable_data/card_master will 503.", path);
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Base64Blob = "";
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IsAvailable = false;
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return;
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}
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if (content.Length == 0)
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{
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log.LogWarning("Card-master blob at {Path} is empty — /immutable_data/card_master will 503.", path);
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Base64Blob = "";
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IsAvailable = false;
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return;
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}
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Base64Blob = content;
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IsAvailable = true;
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log.LogInformation("Loaded card-master blob from {Path} ({Bytes} base64 chars).", path, Base64Blob.Length);
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}
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}
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