ekristen/aws-nuke

package resources

import (
    "context"

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

    "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/nuke"
)

const EC2InternetGatewayResource = "EC2InternetGateway"

func init() {
    registry.Register(&registry.Registration{
        Name:     EC2InternetGatewayResource,
        Scope:    nuke.Account,
        Resource: &EC2InternetGateway{},
        Lister:   &EC2InternetGatewayLister{},
    })
}

type EC2InternetGatewayLister struct{}

func (l *EC2InternetGatewayLister) List(_ context.Context, o interface{}) ([]resource.Resource, error) {
    opts := o.(*nuke.ListerOpts)

    svc := ec2.New(opts.Session)

    resp, err := svc.DescribeInternetGateways(nil)
    if err != nil {
        return nil, err
    }

    defVpcID := ""
    if defVpc := DefaultVpc(svc); defVpc != nil {
        defVpcID = *defVpc.VpcId
    }

    resources := make([]resource.Resource, 0)
    for _, igw := range resp.InternetGateways {
        resources = append(resources, &EC2InternetGateway{
            svc:        svc,
            igw:        igw,
            defaultVPC: HasVpcAttachment(&defVpcID, igw.Attachments),
        })
    }

    return resources, nil
}

func HasVpcAttachment(vpcID *string, attachments []*ec2.InternetGatewayAttachment) bool {
    if *vpcID == "" {
        return false
    }

    for _, attach := range attachments {
        if *vpcID == *attach.VpcId {
            return true
        }
    }
    return false
}

type EC2InternetGateway struct {
    svc        *ec2.EC2
    igw        *ec2.InternetGateway
    defaultVPC bool
}

func (e *EC2InternetGateway) Remove(_ context.Context) error {
    params := &ec2.DeleteInternetGatewayInput{
        InternetGatewayId: e.igw.InternetGatewayId,
    }

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

    return nil
}

func (e *EC2InternetGateway) Properties() types.Properties {
    properties := types.NewProperties()
    for _, tagValue := range e.igw.Tags {
        properties.SetTag(tagValue.Key, tagValue.Value)
    }
    properties.Set("DefaultVPC", e.defaultVPC)
    properties.Set("OwnerID", e.igw.OwnerId)
    return properties
}

func (e *EC2InternetGateway) String() string {
    return ptr.ToString(e.igw.InternetGatewayId)
}