wip:feat: add direct logMetric

Signed-off-by: Alex Pana <[email protected]>

pkg/controller/direct/logging/client.go

@@ -0,0 +1,70 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package logging
+
+import (
+	"context"
+	"fmt"
+
+	// todo acpana: is this stable?
+	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/controller"
+	api "google.golang.org/api/logging/v2"
+	"google.golang.org/api/option"
+)
+
+type gcpClient struct {
+	config controller.Config
+}
+
+func newGCPClient(ctx context.Context, config *controller.Config) (*gcpClient, error) {
+	gcpClient := &gcpClient{
+		config: *config,
+	}
+	return gcpClient, nil
+}
+
+func (m *gcpClient) options() ([]option.ClientOption, error) {
+	var opts []option.ClientOption
+	if m.config.UserAgent != "" {
+		opts = append(opts, option.WithUserAgent(m.config.UserAgent))
+	}
+	if m.config.HTTPClient != nil {
+		// TODO: Set UserAgent in this scenario (error is: WithHTTPClient is incompatible with gRPC dial options)
+		opts = append(opts, option.WithHTTPClient(m.config.HTTPClient))
+	}
+	if m.config.UserProjectOverride && m.config.BillingProject != "" {
+		opts = append(opts, option.WithQuotaProject(m.config.BillingProject))
+	}
+
+	// TODO: support endpoints?
+	// if m.config.Endpoint != "" {
+	// 	opts = append(opts, option.WithEndpoint(m.config.Endpoint))
+	// }
+
+	return opts, nil
+}
+
+func (m *gcpClient) newLogMetricsClient(ctx context.Context) (*api.ProjectsMetricsService, error) {
+	opts, err := m.options()
+	if err != nil {
+		return nil, err
+	}
+	service, err := api.NewService(ctx, opts...)
+	if err != nil {
+		return nil, fmt.Errorf("building service for logging: %w", err)
+	}
+
+	return api.NewProjectsMetricsService(service), nil
+}