added dataForsyningenHealthCheck

src/web/Server/Features/UserSearch/DataForsyningenHealthCheck.cs

@@ -0,0 +1,40 @@
+using System.Net;
+using Jordnaer.Shared.UserSearch;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+
+namespace Jordnaer.Server.Features.UserSearch;
+
+public class DataForsyningenHealthCheck : IHealthCheck
+{
+    private readonly IDataForsyningenClient _dataForsyningenClient;
+    private readonly ILogger<DataForsyningenHealthCheck> _logger;
+
+    public DataForsyningenHealthCheck(IDataForsyningenClient dataForsyningenClient, ILogger<DataForsyningenHealthCheck> logger)
+    {
+        _dataForsyningenClient = dataForsyningenClient;
+        _logger = logger;
+    }
+
+    public async Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context,
+        CancellationToken cancellationToken = default)
+    {
+        var pingResult = await _dataForsyningenClient.Ping(cancellationToken);
+
+        if (pingResult.IsSuccessStatusCode)
+        {
+            return HealthCheckResult.Healthy();
+        }
+        if (pingResult.StatusCode is HttpStatusCode.TooManyRequests)
+        {
+            _logger.LogWarning("The {healthCheckName} has hit the rate limit.", nameof(DataForsyningenHealthCheck));
+            return HealthCheckResult.Healthy();
+        }
+        if (pingResult.Error is not null)
+        {
+            return new HealthCheckResult(HealthStatus.Degraded, pingResult.Error.Message, pingResult.Error);
+        }
+
+        return HealthCheckResult.Healthy();
+    }
+}

src/web/Server/Features/UserSearch/ServiceCollectionExtensions.cs

@@ -15,6 +15,8 @@ public static IServiceCollection AddUserSearchServices(this IServiceCollection s
 
         services.AddDataForsyningenClient();
 
+        services.AddHealthChecks().AddCheck<DataForsyningenHealthCheck>("dataforsyningen", tags: new[] { "external", "api" });
+
         return services;
     }
 }