Add API

API/NamedSwaggerGenOptions.cs

@@ -0,0 +1,46 @@
+using Asp.Versioning.ApiExplorer;
+using Microsoft.Extensions.Options;
+using Microsoft.OpenApi.Models;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace API;
+
+public class NamedSwaggerGenOptions : IConfigureNamedOptions<SwaggerGenOptions>
+{
+    private readonly IApiVersionDescriptionProvider provider;
+    public NamedSwaggerGenOptions(IApiVersionDescriptionProvider provider)
+    {
+        this.provider = provider;
+    }
+
+    public void Configure(string? name, SwaggerGenOptions options)
+    {
+        Configure(options);
+    }
+        
+    public void Configure(SwaggerGenOptions options)
+    {
+        // add swagger document for every API version discovered
+        foreach (var description in provider.ApiVersionDescriptions)
+        {
+            options.SwaggerDoc(
+                description.GroupName,
+                CreateVersionInfo(description));
+        }
+    }
+        
+    private OpenApiInfo CreateVersionInfo(
+        ApiVersionDescription description)
+    {
+        var info = new OpenApiInfo()
+        {
+            Title = "Test API " + description.GroupName,
+            Version = description.ApiVersion.ToString()
+        };
+        if (description.IsDeprecated)
+        {
+            info.Description += " This API version has been deprecated.";
+        }
+        return info;
+    }
+}