3a18ca0579
- PostgreSQL metadata overlay layer on top of existing S3 storage - 3 new tables: folders, files, share_links - Folder CRUD: create, get with children, tree, rename, delete (cascade) - File operations: upload to folder, move between folders - Share links: create with optional password/expiry/download limit, public access - S3 compensation on PG write failure - Existing 14 endpoints untouched
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
package handlers
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import (
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"context"
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"fmt"
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"io"
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"time"
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"rag/file-system/internal/common"
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"rag/file-system/internal/domain/model"
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"rag/file-system/internal/domain/repository"
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"github.com/google/uuid"
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)
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type UploadToFolderCommand struct {
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FolderID string
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FileName string
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Data io.Reader
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S3Bucket string
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OwnerID string
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}
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type MoveFileCommand struct {
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FileID string
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TargetFolderID string
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OwnerID string
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}
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type UploadToFolderHandler struct {
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FileMetaRepo repository.FileMetaRepository
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FolderRepo repository.FolderRepository
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S3Repo repository.FileRepository
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}
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func NewUploadToFolderHandler(
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fileMetaRepo repository.FileMetaRepository,
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folderRepo repository.FolderRepository,
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s3Repo repository.FileRepository,
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) *UploadToFolderHandler {
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return &UploadToFolderHandler{
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FileMetaRepo: fileMetaRepo,
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FolderRepo: folderRepo,
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S3Repo: s3Repo,
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}
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}
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func (h *UploadToFolderHandler) Handle(ctx context.Context, cmd UploadToFolderCommand) (*model.FileMeta, error) {
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folder, err := h.FolderRepo.GetByID(ctx, cmd.FolderID)
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if err != nil {
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return nil, err
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}
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if folder == nil || folder.OwnerID != cmd.OwnerID {
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return nil, common.NewNotFoundError("目录不存在")
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}
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s3Key := uuid.New().String()
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if err := h.S3Repo.UploadFile(ctx, cmd.S3Bucket, s3Key, cmd.Data); err != nil {
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return nil, fmt.Errorf("S3 upload failed: %w", err)
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}
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now := time.Now()
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fileMeta := &model.FileMeta{
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ID: uuid.New().String(),
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FolderID: cmd.FolderID,
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Name: cmd.FileName,
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S3Key: s3Key,
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S3Bucket: cmd.S3Bucket,
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ContentType: "application/octet-stream",
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OwnerID: cmd.OwnerID,
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CreatedAt: now,
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UpdatedAt: now,
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}
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if err := h.FileMetaRepo.Create(ctx, fileMeta); err != nil {
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if delErr := h.S3Repo.DeleteFile(ctx, cmd.S3Bucket, s3Key); delErr != nil {
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common.Logger.Error("compensation failed: could not delete S3 object after PG write failure",
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"s3_key", s3Key, "error", delErr)
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}
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return nil, fmt.Errorf("failed to save file metadata: %w", err)
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}
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return fileMeta, nil
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}
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type MoveFileHandler struct {
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FileMetaRepo repository.FileMetaRepository
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}
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func NewMoveFileHandler(fileMetaRepo repository.FileMetaRepository) *MoveFileHandler {
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return &MoveFileHandler{FileMetaRepo: fileMetaRepo}
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}
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func (h *MoveFileHandler) Handle(ctx context.Context, cmd MoveFileCommand) (string, error) {
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if err := h.FileMetaRepo.Move(ctx, cmd.FileID, cmd.TargetFolderID, cmd.OwnerID); err != nil {
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return "", err
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}
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return "文件移动成功", nil
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}
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