feat!: native AOT for api app #26

api/Health/HealthCheckWriter.cs

@@ -0,0 +1,67 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+
+namespace BonchCalendar.Health;
+
+public static class HealthCheckWriter
+{
+	private static readonly byte[] _emptyResponse = [ (byte)'{', (byte)'}' ];
+	private static JsonSerializerContext? _jsonContext = null;
+
+	public static JsonSerializerContext JsonContext => _jsonContext ??= CreateSerializerContext();
+
+	public static async Task WriteHealthCheckResponse(HttpContext context, HealthReport report)
+	{
+		if (report is null)
+		{
+			await context.Response.BodyWriter.WriteAsync(_emptyResponse).ConfigureAwait(false);
+			return;
+		}
+
+		HealthResponse response = new(
+			Status: report.Status,
+			TotalDuration: report.TotalDuration,
+			Entries: report.Entries.ToDictionary(
+				e => e.Key,
+				e => new HealthResponseEntry(
+					Status: e.Value.Status,
+					Description: e.Value.Description,
+					Duration: e.Value.Duration,
+					Data: e.Value.Data
+				)
+			)
+		);
+
+		context.Response.ContentType = "application/json; charset=utf-8";
+
+		await JsonSerializer.SerializeAsync(context.Response.Body, response, typeof(HealthResponse), JsonContext).ConfigureAwait(false);
+	}
+
+	private static AppJsonSerializerContext CreateSerializerContext()
+	{
+		JsonSerializerOptions options = new()
+		{
+			PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+			DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+		};
+
+		options.Converters.Add(new JsonStringEnumConverter<HealthStatus>(options.PropertyNamingPolicy));
+		options.TypeInfoResolverChain.Insert(0, AppJsonSerializerContext.Default);
+
+		return new AppJsonSerializerContext(options);
+	}
+}
+
+public record HealthResponse(
+	HealthStatus Status,
+	TimeSpan TotalDuration,
+	IReadOnlyDictionary<string, HealthResponseEntry> Entries
+);
+
+public record HealthResponseEntry(
+	HealthStatus Status,
+	string? Description,
+	TimeSpan Duration,
+	IReadOnlyDictionary<string, object> Data
+);