1 files changed, 58 insertions, 0 deletions
diff --git a/code/api/src/Utilities/SwaggerDefaultValues.cs b/code/api/src/Utilities/SwaggerDefaultValues.cs
new file mode 100644
index 0000000..5e73fa8
--- /dev/null
+++ b/code/api/src/Utilities/SwaggerDefaultValues.cs
@@ -0,0 +1,58 @@
+using Microsoft.AspNetCore.Mvc.ApiExplorer;
+using Swashbuckle.AspNetCore.SwaggerGen;
+
+namespace IOL.GreatOffice.Api.Utilities;
+
+/// <summary>
+/// Represents the Swagger/Swashbuckle operation filter used to document the implicit API version parameter.
+/// </summary>
+/// <remarks>This <see cref="IOperationFilter"/> is only required due to bugs in the <see cref="SwaggerGenerator"/>.
+/// Once they are fixed and published, this class can be removed.</remarks>
+public class SwaggerDefaultValues : IOperationFilter
+{
+	/// <summary>
+	/// Applies the filter to the specified operation using the given context.
+	/// </summary>
+	/// <param name="operation">The operation to apply the filter to.</param>
+	/// <param name="context">The current operation filter context.</param>
+	public void Apply(OpenApiOperation operation, OperationFilterContext context) {
+		var apiDescription = context.ApiDescription;
+
+		operation.Deprecated |= apiDescription.IsDeprecated();
+
+		// REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/1752#issue-663991077
+		foreach (var responseType in context.ApiDescription.SupportedResponseTypes) {
+			// REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/blob/b7cf75e7905050305b115dd96640ddd6e74c7ac9/src/Swashbuckle.AspNetCore.SwaggerGen/SwaggerGenerator/SwaggerGenerator.cs#L383-L387
+			var responseKey = responseType.IsDefaultResponse ? "default" : responseType.StatusCode.ToString();
+			var response = operation.Responses[responseKey];
+
+			foreach (var contentType in response.Content.Keys) {
+				if (responseType.ApiResponseFormats.All(x => x.MediaType != contentType)) {
+					response.Content.Remove(contentType);
+				}
+			}
+		}
+
+		if (operation.Parameters == null) {
+			return;
+		}
+
+		// REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/412
+		// REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/pull/413
+		foreach (var parameter in operation.Parameters) {
+			var description = apiDescription.ParameterDescriptions.First(p => p.Name == parameter.Name);
+
+			if (parameter.Description == null) {
+				parameter.Description = description.ModelMetadata.Description;
+			}
+
+			if (parameter.Schema.Default == null && description.DefaultValue != null) {
+				// REF: https://github.com/Microsoft/aspnet-api-versioning/issues/429#issuecomment-605402330
+				var json = JsonSerializer.Serialize(description.DefaultValue, description.ModelMetadata.ModelType);
+				parameter.Schema.Default = OpenApiAnyFactory.CreateFromJson(json);
+			}
+
+			parameter.Required |= description.IsRequired;
+		}
+	}
+}