ekristen/aws-nuke

package resources

import (
    "context"
    "fmt"

    "github.com/gotidy/ptr"

    "github.com/aws/aws-sdk-go/aws"
    "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/nuke"
)

const EC2InternetGatewayAttachmentResource = "EC2InternetGatewayAttachment"

func init() {
    registry.Register(&registry.Registration{
        Name:     EC2InternetGatewayAttachmentResource,
        Scope:    nuke.Account,
        Resource: &EC2InternetGatewayAttachment{},
        Lister:   &EC2InternetGatewayAttachmentLister{},
        DeprecatedAliases: []string{
            "EC2InternetGatewayAttachement",
        },
    })
}

type EC2InternetGatewayAttachmentLister struct{}

func (l *EC2InternetGatewayAttachmentLister) List(_ context.Context, o interface{}) ([]resource.Resource, error) {
    opts := o.(*nuke.ListerOpts)

    svc := ec2.New(opts.Session)

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

    resources := make([]resource.Resource, 0)
    for _, vpc := range resp.Vpcs {
        params := &ec2.DescribeInternetGatewaysInput{
            Filters: []*ec2.Filter{
                {
                    Name:   aws.String("attachment.vpc-id"),
                    Values: []*string{vpc.VpcId},
                },
            },
        }

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

        for _, igw := range resp.InternetGateways {
            resources = append(resources, &EC2InternetGatewayAttachment{
                svc:        svc,
                vpcID:      vpc.VpcId,
                vpcOwnerID: vpc.OwnerId,
                vpcTags:    vpc.Tags,
                igwID:      igw.InternetGatewayId,
                igwOwnerID: igw.OwnerId,
                igwTags:    igw.Tags,
                defaultVPC: *vpc.IsDefault,
            })
        }
    }

    return resources, nil
}

type EC2InternetGatewayAttachment struct {
    svc        *ec2.EC2
    vpcID      *string
    vpcOwnerID *string
    vpcTags    []*ec2.Tag
    igwID      *string
    igwOwnerID *string
    igwTags    []*ec2.Tag
    defaultVPC bool
}

func (e *EC2InternetGatewayAttachment) Remove(_ context.Context) error {
    params := &ec2.DetachInternetGatewayInput{
        VpcId:             e.vpcID,
        InternetGatewayId: e.igwID,
    }

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

    return nil
}

func (e *EC2InternetGatewayAttachment) Properties() types.Properties {
    properties := types.NewProperties()

    properties.Set("DefaultVPC", e.defaultVPC)
    properties.SetWithPrefix("vpc", "OwnerID", e.vpcOwnerID)
    properties.SetWithPrefix("igw", "OwnerID", e.igwOwnerID)

    for _, tagValue := range e.igwTags {
        properties.SetTagWithPrefix("igw", tagValue.Key, tagValue.Value)
    }
    for _, tagValue := range e.vpcTags {
        properties.SetTagWithPrefix("vpc", tagValue.Key, tagValue.Value)
    }

    return properties
}

func (e *EC2InternetGatewayAttachment) String() string {
    return fmt.Sprintf("%s -> %s", ptr.ToString(e.igwID), ptr.ToString(e.vpcID))
}