[node operator] GCP: use canonical references

operators/constellation-node-operator/internal/gcp/client/project.go

@@ -0,0 +1,26 @@
+package client
+
+import (
+	"context"
+	"errors"
+	"regexp"
+
+	"google.golang.org/genproto/googleapis/cloud/compute/v1"
+)
+
+var numericProjectIDRegex = regexp.MustCompile(`^\d+$`)
+
+// canonicalProjectID returns the project id for a given project id or project number.
+func (c *Client) canonicalProjectID(ctx context.Context, project string) (string, error) {
+	if !numericProjectIDRegex.MatchString(project) {
+		return project, nil
+	}
+	computeProject, err := c.projectAPI.Get(ctx, &compute.GetProjectRequest{Project: project})
+	if err != nil {
+		return "", err
+	}
+	if computeProject == nil || computeProject.Name == nil {
+		return "", errors.New("invalid project")
+	}
+	return *computeProject.Name, nil
+}