mirror of
https://github.com/get-drexa/drive.git
synced 2025-11-30 21:41:39 +00:00
487 lines
10 KiB
Go
487 lines
10 KiB
Go
package virtualfs
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/rand"
|
|
"database/sql"
|
|
"encoding/binary"
|
|
"errors"
|
|
"io"
|
|
|
|
"github.com/gabriel-vasile/mimetype"
|
|
"github.com/get-drexa/drexa/internal/blob"
|
|
"github.com/get-drexa/drexa/internal/database"
|
|
"github.com/get-drexa/drexa/internal/ioext"
|
|
"github.com/google/uuid"
|
|
"github.com/sqids/sqids-go"
|
|
"github.com/uptrace/bun"
|
|
)
|
|
|
|
type VirtualFS struct {
|
|
db *bun.DB
|
|
blobStore blob.Store
|
|
keyResolver BlobKeyResolver
|
|
|
|
sqid *sqids.Sqids
|
|
}
|
|
|
|
type CreateNodeOptions struct {
|
|
ParentID uuid.UUID
|
|
Kind NodeKind
|
|
Name string
|
|
}
|
|
|
|
type CreateFileOptions struct {
|
|
ParentID uuid.UUID
|
|
Name string
|
|
}
|
|
|
|
type FileContent struct {
|
|
reader io.Reader
|
|
blobKey blob.Key
|
|
}
|
|
|
|
func FileContentFromReader(reader io.Reader) FileContent {
|
|
return FileContent{reader: reader}
|
|
}
|
|
|
|
func FileContentFromBlobKey(blobKey blob.Key) FileContent {
|
|
return FileContent{blobKey: blobKey}
|
|
}
|
|
|
|
func NewVirtualFS(db *bun.DB, blobStore blob.Store, keyResolver BlobKeyResolver) (*VirtualFS, error) {
|
|
sqid, err := sqids.New()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &VirtualFS{
|
|
db: db,
|
|
blobStore: blobStore,
|
|
keyResolver: keyResolver,
|
|
sqid: sqid,
|
|
}, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) FindNode(ctx context.Context, userID, fileID string) (*Node, error) {
|
|
var node Node
|
|
err := vfs.db.NewSelect().Model(&node).
|
|
Where("user_id = ?", userID).
|
|
Where("id = ?", fileID).
|
|
Where("status = ?", NodeStatusReady).
|
|
Where("deleted_at IS NULL").
|
|
Scan(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return nil, ErrNodeNotFound
|
|
}
|
|
return nil, err
|
|
}
|
|
return &node, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) FindNodeByPublicID(ctx context.Context, userID uuid.UUID, publicID string) (*Node, error) {
|
|
var node Node
|
|
err := vfs.db.NewSelect().Model(&node).
|
|
Where("user_id = ?", userID).
|
|
Where("public_id = ?", publicID).
|
|
Where("status = ?", NodeStatusReady).
|
|
Where("deleted_at IS NULL").
|
|
Scan(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return nil, ErrNodeNotFound
|
|
}
|
|
return nil, err
|
|
}
|
|
return &node, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) ListChildren(ctx context.Context, node *Node) ([]*Node, error) {
|
|
if !node.IsAccessible() {
|
|
return nil, ErrNodeNotFound
|
|
}
|
|
|
|
var nodes []*Node
|
|
err := vfs.db.NewSelect().Model(&nodes).
|
|
Where("user_id = ?", node.UserID).
|
|
Where("parent_id = ?", node.ID).
|
|
Where("status = ?", NodeStatusReady).
|
|
Where("deleted_at IS NULL").
|
|
Scan(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return make([]*Node, 0), nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
return nodes, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) CreateFile(ctx context.Context, userID uuid.UUID, opts CreateFileOptions) (*Node, error) {
|
|
pid, err := vfs.generatePublicID()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
node := Node{
|
|
PublicID: pid,
|
|
UserID: userID,
|
|
ParentID: opts.ParentID,
|
|
Kind: NodeKindFile,
|
|
Status: NodeStatusPending,
|
|
Name: opts.Name,
|
|
}
|
|
|
|
if vfs.keyResolver.KeyMode() == blob.KeyModeStable {
|
|
node.BlobKey, err = vfs.keyResolver.Resolve(ctx, &node)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
_, err = vfs.db.NewInsert().Model(&node).Returning("*").Exec(ctx)
|
|
if err != nil {
|
|
if database.IsUniqueViolation(err) {
|
|
return nil, ErrNodeConflict
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
return &node, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) WriteFile(ctx context.Context, node *Node, content FileContent) error {
|
|
if content.reader == nil && content.blobKey.IsNil() {
|
|
return blob.ErrInvalidFileContent
|
|
}
|
|
|
|
if !node.DeletedAt.IsZero() {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
setCols := make([]string, 0, 4)
|
|
|
|
if content.reader != nil {
|
|
key, err := vfs.keyResolver.Resolve(ctx, node)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
buf := make([]byte, 3072)
|
|
n, err := io.ReadFull(content.reader, buf)
|
|
if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
|
|
return err
|
|
}
|
|
buf = buf[:n]
|
|
|
|
mt := mimetype.Detect(buf)
|
|
cr := ioext.NewCountingReader(io.MultiReader(bytes.NewReader(buf), content.reader))
|
|
|
|
err = vfs.blobStore.Put(ctx, key, cr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if vfs.keyResolver.KeyMode() == blob.KeyModeStable {
|
|
node.BlobKey = key
|
|
setCols = append(setCols, "blob_key")
|
|
}
|
|
|
|
node.MimeType = mt.String()
|
|
node.Size = cr.Count()
|
|
node.Status = NodeStatusReady
|
|
|
|
setCols = append(setCols, "mime_type", "size", "status")
|
|
} else {
|
|
node.BlobKey = content.blobKey
|
|
|
|
b, err := vfs.blobStore.ReadRange(ctx, content.blobKey, 0, 3072)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.Close()
|
|
|
|
buf := make([]byte, 3072)
|
|
n, err := io.ReadFull(b, buf)
|
|
if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
|
|
return err
|
|
}
|
|
buf = buf[:n]
|
|
mt := mimetype.Detect(buf)
|
|
node.MimeType = mt.String()
|
|
node.Status = NodeStatusReady
|
|
|
|
s, err := vfs.blobStore.ReadSize(ctx, content.blobKey)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
node.Size = s
|
|
|
|
setCols = append(setCols, "mime_type", "blob_key", "size", "status")
|
|
}
|
|
|
|
_, err := vfs.db.NewUpdate().Model(&node).
|
|
Column(setCols...).
|
|
WherePK().
|
|
Exec(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) CreateDirectory(ctx context.Context, userID uuid.UUID, parentID uuid.UUID, name string) (*Node, error) {
|
|
pid, err := vfs.generatePublicID()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
node := Node{
|
|
PublicID: pid,
|
|
UserID: userID,
|
|
ParentID: parentID,
|
|
Kind: NodeKindDirectory,
|
|
Status: NodeStatusReady,
|
|
Name: name,
|
|
}
|
|
|
|
_, err = vfs.db.NewInsert().Model(&node).Exec(ctx)
|
|
if err != nil {
|
|
if database.IsUniqueViolation(err) {
|
|
return nil, ErrNodeConflict
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
return &node, nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) SoftDeleteNode(ctx context.Context, node *Node) error {
|
|
if !node.IsAccessible() {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
_, err := vfs.db.NewUpdate().Model(node).
|
|
WherePK().
|
|
Where("deleted_at IS NULL").
|
|
Where("status = ?", NodeStatusReady).
|
|
Set("deleted_at = NOW()").
|
|
Returning("deleted_at").
|
|
Exec(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return ErrNodeNotFound
|
|
}
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) RestoreNode(ctx context.Context, node *Node) error {
|
|
if node.Status != NodeStatusReady {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
_, err := vfs.db.NewUpdate().Model(node).
|
|
WherePK().
|
|
Where("deleted_at IS NOT NULL").
|
|
Set("deleted_at = NULL").
|
|
Returning("deleted_at").
|
|
Exec(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return ErrNodeNotFound
|
|
}
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) RenameNode(ctx context.Context, node *Node, name string) error {
|
|
if !node.IsAccessible() {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
_, err := vfs.db.NewUpdate().Model(node).
|
|
WherePK().
|
|
Where("status = ?", NodeStatusReady).
|
|
Where("deleted_at IS NULL").
|
|
Set("name = ?", name).
|
|
Returning("name, updated_at").
|
|
Exec(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return ErrNodeNotFound
|
|
}
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) MoveNode(ctx context.Context, node *Node, parentID uuid.UUID) error {
|
|
if !node.IsAccessible() {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
oldKey, err := vfs.keyResolver.Resolve(ctx, node)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = vfs.db.NewUpdate().Model(node).
|
|
WherePK().
|
|
Where("status = ?", NodeStatusReady).
|
|
Where("deleted_at IS NULL").
|
|
Set("parent_id = ?", parentID).
|
|
Returning("parent_id, updated_at").
|
|
Exec(ctx)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return ErrNodeNotFound
|
|
}
|
|
if database.IsUniqueViolation(err) {
|
|
return ErrNodeConflict
|
|
}
|
|
return err
|
|
}
|
|
|
|
newKey, err := vfs.keyResolver.Resolve(ctx, node)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = vfs.blobStore.Move(ctx, oldKey, newKey)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if vfs.keyResolver.KeyMode() == blob.KeyModeStable {
|
|
node.BlobKey = newKey
|
|
_, err = vfs.db.NewUpdate().Model(node).
|
|
WherePK().
|
|
Set("blob_key = ?", newKey).
|
|
Exec(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) AbsolutePath(ctx context.Context, node *Node) (string, error) {
|
|
if !node.IsAccessible() {
|
|
return "", ErrNodeNotFound
|
|
}
|
|
return buildNodeAbsolutePath(ctx, vfs.db, node.ID)
|
|
}
|
|
|
|
func (vfs *VirtualFS) PermanentlyDeleteNode(ctx context.Context, node *Node) error {
|
|
if !node.IsAccessible() {
|
|
return ErrNodeNotFound
|
|
}
|
|
switch node.Kind {
|
|
case NodeKindFile:
|
|
return vfs.permanentlyDeleteFileNode(ctx, node)
|
|
case NodeKindDirectory:
|
|
return vfs.permanentlyDeleteDirectoryNode(ctx, node)
|
|
default:
|
|
return ErrUnsupportedOperation
|
|
}
|
|
}
|
|
|
|
func (vfs *VirtualFS) permanentlyDeleteFileNode(ctx context.Context, node *Node) error {
|
|
err := vfs.blobStore.Delete(ctx, node.BlobKey)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = vfs.db.NewDelete().Model(node).WherePK().Exec(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (vfs *VirtualFS) permanentlyDeleteDirectoryNode(ctx context.Context, node *Node) error {
|
|
const descendantsQuery = `WITH RECURSIVE descendants AS (
|
|
SELECT id, blob_key FROM vfs_nodes WHERE id = ?
|
|
UNION ALL
|
|
SELECT n.id, n.blob_key FROM vfs_nodes n
|
|
JOIN descendants d ON n.parent_id = d.id
|
|
)
|
|
SELECT id, blob_key FROM descendants`
|
|
|
|
type nodeRecord struct {
|
|
ID uuid.UUID `bun:"id"`
|
|
BlobKey blob.Key `bun:"blob_key"`
|
|
}
|
|
|
|
tx, err := vfs.db.BeginTx(ctx, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer tx.Rollback()
|
|
|
|
var records []nodeRecord
|
|
err = tx.NewRaw(descendantsQuery, node.ID).Scan(ctx, &records)
|
|
if err != nil {
|
|
if errors.Is(err, sql.ErrNoRows) {
|
|
return ErrNodeNotFound
|
|
}
|
|
return err
|
|
}
|
|
|
|
if len(records) == 0 {
|
|
return ErrNodeNotFound
|
|
}
|
|
|
|
nodeIDs := make([]uuid.UUID, 0, len(records))
|
|
blobKeys := make([]blob.Key, 0, len(records))
|
|
for _, r := range records {
|
|
nodeIDs = append(nodeIDs, r.ID)
|
|
if !r.BlobKey.IsNil() {
|
|
blobKeys = append(blobKeys, r.BlobKey)
|
|
}
|
|
}
|
|
|
|
plan, err := vfs.keyResolver.ResolveDeletionKeys(ctx, node, blobKeys)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = tx.NewDelete().
|
|
Model((*Node)(nil)).
|
|
Where("id IN (?)", bun.In(nodeIDs)).
|
|
Exec(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !plan.Prefix.IsNil() {
|
|
_ = vfs.blobStore.DeletePrefix(ctx, plan.Prefix)
|
|
} else {
|
|
for _, key := range plan.Keys {
|
|
_ = vfs.blobStore.Delete(ctx, key)
|
|
}
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
func (vfs *VirtualFS) generatePublicID() (string, error) {
|
|
var b [8]byte
|
|
_, err := rand.Read(b[:])
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
n := binary.BigEndian.Uint64(b[:])
|
|
return vfs.sqid.Encode([]uint64{n})
|
|
}
|