Feature Request: Add Metadata to All/Multiple Functions At Once

[jhartman-resurgent]

I currently have to add an OpenApiSecurity attribute to every function, even though they are all the same. I would like to be able to add metadata to functions using code to fit my conventions.

Pseudocode
I'm just making up syntax here to convey the idea.

var host = new HostBuilder()
            .ConfigureFunctionsWorkerDefaults()
            .ConfigureOpenApi(ApplyOpenApiMetadata)
            .Build();

public static void ApplyOpenApiMetadata(OpenApiContext context) {
  context.Options.Title = "My Awesome API";

  context.Functions
    .Where(f => f.AuthorizationLevel == AuthorizationLevel.Function)
    .AddAttribute(OpenApiSecurityAttrbute, "function_key", SecuritySchemeType.ApiKey, "x-functions-key", OpenApiSecurityLocationType.Header)
    .AddAttribute(OpenApiResponseWithBody, HttpStatusCode.Unauthorized, "text/plain", "Unauthorized");

  foreach(var endpoint in context.Functions) {
    foreach(var param in endpoint.Parameters) {
      endpoint.AddAttribute(OpenApiParameter, param.Name, param.Attributes.HasKey("FromRoute") ? ParameterLocation.Path : ParameterLocation.Query);
    }
  }
}

If we had to do our own reflection, that would be fine with me.

[justinyoo]

@jhartman-resurgent Thanks for the idea! It looks brilliant. At this moment, I'm not able to guarantee whether this idea is implemented soon or not, but let's keep this discussion open.