ekristen/aws-nuke

package resources

import (
    "context"
    "fmt"

    "github.com/aws/aws-sdk-go/service/ec2"

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

    "github.com/ekristen/aws-nuke/v3/pkg/awsutil"
    "github.com/ekristen/aws-nuke/v3/pkg/nuke"
)

const EC2TGWAttachmentResource = "EC2TGWAttachment"

func init() {
    registry.Register(&registry.Registration{
        Name:     EC2TGWAttachmentResource,
        Scope:    nuke.Account,
        Resource: &EC2TGWAttachment{},
        Lister:   &EC2TGWAttachmentLister{},
    })
}

type EC2TGWAttachmentLister struct{}

func (l *EC2TGWAttachmentLister) List(_ context.Context, o interface{}) ([]resource.Resource, error) {
    opts := o.(*nuke.ListerOpts)

    svc := ec2.New(opts.Session)

    params := &ec2.DescribeTransitGatewayAttachmentsInput{}
    resources := make([]resource.Resource, 0)
    for {
        resp, err := svc.DescribeTransitGatewayAttachments(params)
        if err != nil {
            return nil, err
        }

        for _, tgwa := range resp.TransitGatewayAttachments {
            resources = append(resources, &EC2TGWAttachment{
                svc:  svc,
                tgwa: tgwa,
            })
        }

        if resp.NextToken == nil {
            break
        }

        params = &ec2.DescribeTransitGatewayAttachmentsInput{
            NextToken: resp.NextToken,
        }
    }

    return resources, nil
}

type EC2TGWAttachment struct {
    svc  *ec2.EC2
    tgwa *ec2.TransitGatewayAttachment
}

func (e *EC2TGWAttachment) Remove(_ context.Context) error {
    if *e.tgwa.ResourceType == "VPN" {
        // This will get deleted as part of EC2VPNConnection, there is no API
        // as part of TGW to delete VPN attachments.
        return fmt.Errorf("VPN attachment")
    }
    params := &ec2.DeleteTransitGatewayVpcAttachmentInput{
        TransitGatewayAttachmentId: e.tgwa.TransitGatewayAttachmentId,
    }

    _, err := e.svc.DeleteTransitGatewayVpcAttachment(params)
    if err != nil {
        return err
    }

    return nil
}

func (e *EC2TGWAttachment) Filter() error {
    if *e.tgwa.State == awsutil.StateDeleted {
        return fmt.Errorf("already deleted")
    }

    return nil
}

func (e *EC2TGWAttachment) Properties() types.Properties {
    properties := types.NewProperties()
    for _, tagValue := range e.tgwa.Tags {
        properties.SetTag(tagValue.Key, tagValue.Value)
    }
    properties.Set("ID", e.tgwa.TransitGatewayAttachmentId)
    return properties
}

func (e *EC2TGWAttachment) String() string {
    return fmt.Sprintf("%s(%s)", *e.tgwa.TransitGatewayAttachmentId, *e.tgwa.ResourceType)
}