private async Task GetFunctionMetadataAsync()

in src/DotNetWorker.Grpc/GrpcWorker.cs [145:202]
47 lines of code
6 McCabe index (conditional complexity)

        private async Task<FunctionMetadataResponse> GetFunctionMetadataAsync(string functionAppDirectory)
        {
            var response = new FunctionMetadataResponse
            {
                Result = StatusResult.Success,
                UseDefaultMetadataIndexing = false
            };

            try
            {
                var functionMetadataList = await _functionMetadataProvider.GetFunctionMetadataAsync(functionAppDirectory);

                foreach (var func in functionMetadataList)
                {
                    if (func is null)
                    {
                        continue;
                    }

                    if (func.RawBindings?.Any() != true)
                    {
                        throw new InvalidOperationException($"Functions must declare at least one binding. No bindings were found in the function ${nameof(func)}.");
                    }

                    var rpcFuncMetadata = func switch
                    {
                        RpcFunctionMetadata rpc => rpc,
                        _ => BuildRpc(func),
                    };

                    if (func.Retry != null)
                    {
                        rpcFuncMetadata.RetryOptions = func.Retry switch
                        {
                            RpcRetryOptions retry => retry,
                            _ => BuildRpcRetry(func.Retry)
                        };
                    }

                    // add BindingInfo here instead of in the providers  
                    // because we need access to gRPC types in proto-file and source-gen won't have access
                    rpcFuncMetadata.Bindings.Add(func.GetBindingInfoList());

                    response.FunctionMetadataResults.Add(rpcFuncMetadata);
                }

            }
            catch (Exception ex)
            {
                response.Result = new StatusResult
                {
                    Status = StatusResult.Types.Status.Failure,
                    Exception = ex.ToRpcException()
                };
            }

            return response;
        }