Abstract out shared backup functionality

server/backup/backup_s3.go

@@ -2,25 +2,15 @@ package backup
 
 import (
 	"context"
-	"crypto/sha256"
 	"fmt"
-	"github.com/pkg/errors"
-	"github.com/pterodactyl/wings/config"
 	"io"
 	"net/http"
 	"os"
-	"path"
 	"strconv"
 )
 
 type S3Backup struct {
-	// The UUID of this backup object. This must line up with a backup from
-	// the panel instance.
-	Uuid string
-
-	// An array of files to ignore when generating this backup. This should be
-	// compatible with a standard .gitignore structure.
-	IgnoredFiles []string
+	Backup
 
 	// The pre-signed upload endpoint for the generated backup. This must be
 	// provided otherwise this request will fail. This allows us to keep all
@@ -29,13 +19,9 @@ type S3Backup struct {
 	PresignedUrl string
 }
 
-var _ Backup = (*S3Backup)(nil)
+var _ BackupInterface = (*S3Backup)(nil)
 
-func (s *S3Backup) Identifier() string {
-	return s.Uuid
-}
-
-func (s *S3Backup) Backup(included *IncludedFiles, prefix string) error {
+func (s *S3Backup) Generate(included *IncludedFiles, prefix string) error {
 	defer s.Remove()
 
 	a := &Archive{
@@ -85,39 +71,6 @@ func (s *S3Backup) Backup(included *IncludedFiles, prefix string) error {
 	return nil
 }
 
-// Return the size of the generated backup.
-func (s *S3Backup) Size() (int64, error) {
-	st, err := os.Stat(s.Path())
-	if err != nil {
-		return 0, errors.WithStack(err)
-	}
-
-	return st.Size(), nil
-}
-
-// Returns the path for this specific backup. S3 backups are only stored on the disk
-// long enough for us to get the details we need before uploading them to S3.
-func (s *S3Backup) Path() string {
-	return path.Join(config.Get().System.BackupDirectory, s.Uuid+".tmp")
-}
-
-// Returns the SHA256 checksum of a backup.
-func (s *S3Backup) Checksum() ([]byte, error) {
-	h := sha256.New()
-
-	f, err := os.Open(s.Path())
-	if err != nil {
-		return []byte{}, errors.WithStack(err)
-	}
-	defer f.Close()
-
-	if _, err := io.Copy(h, f); err != nil {
-		return []byte{}, errors.WithStack(err)
-	}
-
-	return h.Sum(nil), nil
-}
-
 // Removes a backup from the system.
 func (s *S3Backup) Remove() error {
 	return os.Remove(s.Path())
@@ -129,7 +82,3 @@ func (s *S3Backup) Details() *ArchiveDetails {
 		Size:     1024,
 	}
 }
-
-func (s *S3Backup) Ignored() []string {
-	return s.IgnoredFiles
-}