ekristen/gcp-nuke

package resources

import (
    "context"
    "errors"
    "fmt"
    "github.com/gotidy/ptr"
    "google.golang.org/genproto/googleapis/cloud/location"
    "slices"
    "strings"

    "github.com/sirupsen/logrus"

    "google.golang.org/api/iterator"

    "cloud.google.com/go/functions/apiv1"
    "cloud.google.com/go/functions/apiv1/functionspb"

    liberror "github.com/ekristen/libnuke/pkg/errors"
    "github.com/ekristen/libnuke/pkg/registry"
    "github.com/ekristen/libnuke/pkg/resource"
    "github.com/ekristen/libnuke/pkg/types"

    "github.com/ekristen/gcp-nuke/pkg/nuke"
)

const CloudFunctionResource = "CloudFunction"

func init() {
    registry.Register(&registry.Registration{
        Name:   CloudFunctionResource,
        Scope:  nuke.Project,
        Lister: &CloudFunctionLister{},
    })
}

type CloudFunctionLister struct {
    svc       *functions.CloudFunctionsClient
    locations []string
}

func (l *CloudFunctionLister) Close() {
    if l.svc != nil {
        l.svc.Close()
    }
}

func (l *CloudFunctionLister) List(ctx context.Context, o interface{}) ([]resource.Resource, error) {
    var resources []resource.Resource

    opts := o.(*nuke.ListerOpts)
    if err := opts.BeforeList(nuke.Regional, "cloudfunctions.googleapis.com"); err != nil {
        return resources, err
    }

    if l.svc == nil {
        var err error
        l.svc, err = functions.NewCloudFunctionsRESTClient(ctx, opts.ClientOptions...)
        if err != nil {
            return nil, err
        }

        it := l.svc.ListLocations(ctx, &location.ListLocationsRequest{
            Name: fmt.Sprintf("projects/%s", *opts.Project),
        })
        for {
            resp, err := it.Next()
            if errors.Is(err, iterator.Done) {
                break
            }
            if err != nil {
                return nil, err
            }

            l.locations = append(l.locations, resp.Name)
        }
    }

    parent := fmt.Sprintf("projects/%s/locations/%s", *opts.Project, *opts.Region)

    if !slices.Contains(l.locations, parent) {
        return nil, liberror.ErrSkipRequest(fmt.Sprintf("location %s not supported", *opts.Region))
    }

    req := &functionspb.ListFunctionsRequest{
        Parent: parent,
    }
    it := l.svc.ListFunctions(ctx, req)
    for {
        resp, err := it.Next()
        if errors.Is(err, iterator.Done) {
            break
        }
        if err != nil {
            logrus.WithError(err).Error("unable to iterate cloud functions")
            break
        }

        nameParts := strings.Split(resp.Name, "/")
        name := nameParts[len(nameParts)-1]

        resources = append(resources, &CloudFunction{
            svc:      l.svc,
            project:  opts.Project,
            region:   opts.Region,
            fullName: ptr.String(resp.Name),
            Name:     ptr.String(name),
            Labels:   resp.Labels,
            Status:   ptr.String(resp.Status.String()),
        })
    }

    return resources, nil
}

type CloudFunction struct {
    svc      *functions.CloudFunctionsClient
    removeOp *functions.DeleteFunctionOperation
    project  *string
    region   *string
    fullName *string
    Name     *string
    Status   *string
    Labels   map[string]string `property:"tagPrefix=label"`
}

func (r *CloudFunction) Remove(ctx context.Context) (err error) {
    r.removeOp, err = r.svc.DeleteFunction(ctx, &functionspb.DeleteFunctionRequest{
        Name: *r.fullName,
    })
    if err != nil && strings.Contains(err.Error(), "proto") && strings.Contains(err.Error(), "missing") {
        err = nil
    }
    if err != nil {
        logrus.WithError(err).Debug("error encountered on remove")
    }
    return err
}

func (r *CloudFunction) Properties() types.Properties {
    return types.NewPropertiesFromStruct(r)
}

func (r *CloudFunction) String() string {
    return *r.Name
}

func (r *CloudFunction) HandleWait(ctx context.Context) error {
    if r.removeOp == nil {
        return nil
    }

    if err := r.removeOp.Poll(ctx); err != nil {
        logrus.
            WithField("resource", CloudFunctionResource).
            WithError(err).
            Trace("remove op polling encountered error")
        return err
    }

    if !r.removeOp.Done() {
        return fmt.Errorf("operation still in progress")
    }

    return nil
}