package s3

import (
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3"
)

func ObjectPresent(session *session.Session, key, bucket string) (bool, error) {
	s := s3.New(session)
	_, err := s.HeadObject(&s3.HeadObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	})
	if err != nil {
		if aerr, ok := err.(awserr.Error); ok && aerr.Code() == "NotFound" {
			return false, nil
		}
		return false, fmt.Errorf("getting s3 object head to check if present: %v", err)
	}

	return true, nil
}