s3browser-backend/internal/mutations.go

108 lines
2.3 KiB
Go

package s3browser
import (
"context"
"fmt"
"path/filepath"
"github.com/graph-gophers/dataloader"
"github.com/minio/minio-go/v7"
)
func deleteMutation(ctx context.Context, id string) error {
s3Client, ok := ctx.Value("s3Client").(*minio.Client)
if !ok {
return fmt.Errorf("Failed to get s3Client from context")
}
// TODO: it is posible to remove multiple objects with a single call.
// Is it better to batch this?
err := s3Client.RemoveObject(ctx, bucketName, id, minio.RemoveObjectOptions{})
if err != nil {
return err
}
// Invalidate cache
loader, ok := ctx.Value("loader").(map[string]*dataloader.Loader)
if !ok {
return fmt.Errorf("Failed to get loader from context")
}
loader["getFile"].Clear(ctx, dataloader.StringKey(id))
loader["listObjects"].Clear(ctx, dataloader.StringKey(id))
loader["getFiles"].Clear(ctx, dataloader.StringKey(filepath.Dir(id)))
return nil
}
func copyMutation(ctx context.Context, src, dest string) (*File, error) {
s3Client, ok := ctx.Value("s3Client").(*minio.Client)
if !ok {
return nil, fmt.Errorf("Failed to get s3Client from context")
}
info, err := s3Client.CopyObject(ctx, minio.CopyDestOptions{
Bucket: bucketName,
Object: dest,
}, minio.CopySrcOptions{
Bucket: bucketName,
Object: src,
})
if err != nil {
return nil, err
}
// Invalidate cache
loader, ok := ctx.Value("loader").(map[string]*dataloader.Loader)
// TODO: Do we want to error when the operation
// has succeeded but the cache invalidation has failed ?
if ok {
loader["getFile"].Clear(ctx, dataloader.StringKey(info.Key))
loader["listObjects"].Clear(ctx, dataloader.StringKey(info.Key))
loader["getFiles"].Clear(ctx, dataloader.StringKey(filepath.Dir(info.Key)))
}
return &File{
ID: info.Key,
}, nil
}
func moveMutation(ctx context.Context, src, dest string) (*File, error) {
s3Client, ok := ctx.Value("s3Client").(*minio.Client)
if !ok {
return nil, fmt.Errorf("Failed to get s3Client from context")
}
// There is no (spoon) move. Only copy and delete
info, err := s3Client.CopyObject(ctx, minio.CopyDestOptions{
Bucket: bucketName,
Object: dest,
}, minio.CopySrcOptions{
Bucket: bucketName,
Object: src,
})
if err != nil {
return nil, err
}
err = deleteMutation(ctx, src)
if err != nil {
return nil, err
}
return &File{
ID: info.Key,
}, nil
}