display folders

backend/internal/db/files.sql.go

@@ -7,6 +7,7 @@ package db
 
 import (
 	"context"
+	"database/sql"
 
 	"github.com/lib/pq"
 )
@@ -14,7 +15,7 @@ import (
 const createFile = `-- name: CreateFile :one
 INSERT INTO files (id, name, mime_type, size, storage_key, checksum, created_at, updated_at)
 VALUES ($1, $2, $3, $4, $5, $6, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
-RETURNING id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id
+RETURNING id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder
 `
 
 type CreateFileParams struct {
@@ -47,14 +48,15 @@ func (q *Queries) CreateFile(ctx context.Context, arg CreateFileParams) (File, e
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.ParentFileID,
+		&i.IsFolder,
 	)
 	return i, err
 }
 
 const createFolder = `-- name: CreateFolder :one
-INSERT INTO files (id, name, created_at, updated_at)
+INSERT INTO files (id, name, is_folder, created_at, updated_at)
-VALUES ($1, $2, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+VALUES ($1, $2, true, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
-RETURNING id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id
+RETURNING id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder
 `
 
 type CreateFolderParams struct {
@@ -76,6 +78,7 @@ func (q *Queries) CreateFolder(ctx context.Context, arg CreateFolderParams) (Fil
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.ParentFileID,
+		&i.IsFolder,
 	)
 	return i, err
 }
@@ -91,7 +94,7 @@ func (q *Queries) DeleteFile(ctx context.Context, id string) error {
 }
 
 const getFile = `-- name: GetFile :one
-SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id FROM files
+SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder FROM files
 WHERE id = $1 LIMIT 1
 `
 
@@ -109,12 +112,13 @@ func (q *Queries) GetFile(ctx context.Context, id string) (File, error) {
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.ParentFileID,
+		&i.IsFolder,
 	)
 	return i, err
 }
 
 const listFiles = `-- name: ListFiles :many
-SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id FROM files
+SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder FROM files
 WHERE parent_file_id IS NULL
 ORDER BY created_at DESC
 `
@@ -139,6 +143,7 @@ func (q *Queries) ListFiles(ctx context.Context) ([]File, error) {
 			&i.CreatedAt,
 			&i.UpdatedAt,
 			&i.ParentFileID,
+			&i.IsFolder,
 		); err != nil {
 			return nil, err
 		}
@@ -154,7 +159,7 @@ func (q *Queries) ListFiles(ctx context.Context) ([]File, error) {
 }
 
 const listFilesByID = `-- name: ListFilesByID :many
-SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id FROM files
+SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder FROM files
 WHERE id = ANY($1::text[])
 ORDER BY created_at DESC
 `
@@ -179,6 +184,48 @@ func (q *Queries) ListFilesByID(ctx context.Context, dollar_1 []string) ([]File,
 			&i.CreatedAt,
 			&i.UpdatedAt,
 			&i.ParentFileID,
+			&i.IsFolder,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const listFilesByParentID = `-- name: ListFilesByParentID :many
+SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder FROM files
+WHERE parent_file_id = $1
+ORDER BY is_folder DESC, created_at DESC
+`
+
+func (q *Queries) ListFilesByParentID(ctx context.Context, parentFileID sql.NullString) ([]File, error) {
+	rows, err := q.db.QueryContext(ctx, listFilesByParentID, parentFileID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []File
+	for rows.Next() {
+		var i File
+		if err := rows.Scan(
+			&i.ID,
+			&i.Name,
+			&i.MimeType,
+			&i.Size,
+			&i.StorageKey,
+			&i.Checksum,
+			&i.OcrText,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+			&i.ParentFileID,
+			&i.IsFolder,
 		); err != nil {
 			return nil, err
 		}
@@ -194,8 +241,8 @@ func (q *Queries) ListFilesByID(ctx context.Context, dollar_1 []string) ([]File,
 }
 
 const listFolders = `-- name: ListFolders :many
-SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id FROM files
+SELECT id, name, mime_type, size, storage_key, checksum, ocr_text, created_at, updated_at, parent_file_id, is_folder FROM files
-WHERE parent_file_id IS NOT NULL
+WHERE is_folder = true
 ORDER BY created_at DESC
 `
 
@@ -219,6 +266,7 @@ func (q *Queries) ListFolders(ctx context.Context) ([]File, error) {
 			&i.CreatedAt,
 			&i.UpdatedAt,
 			&i.ParentFileID,
+			&i.IsFolder,
 		); err != nil {
 			return nil, err
 		}

backend/internal/db/migrations/007_add_is_folder.down.sql

@@ -0,0 +1 @@
+ALTER TABLE files DROP COLUMN IF EXISTS is_folder;

backend/internal/db/migrations/007_add_is_folder.up.sql

@@ -0,0 +1,2 @@
+-- VaultDrop 007: re-add is_folder to distinguish folders from files
+ALTER TABLE files ADD COLUMN is_folder BOOLEAN NOT NULL DEFAULT false;

backend/internal/db/models.go

@@ -20,6 +20,7 @@ type File struct {
 	CreatedAt    time.Time      `json:"created_at"`
 	UpdatedAt    time.Time      `json:"updated_at"`
 	ParentFileID sql.NullString `json:"parent_file_id"`
+	IsFolder     bool           `json:"is_folder"`
 }
 
 type FileTag struct {

backend/internal/db/queries/files.sql

@@ -9,7 +9,7 @@ ORDER BY created_at DESC;
 
 -- name: ListFolders :many
 SELECT * FROM files
-WHERE parent_file_id IS NOT NULL
+WHERE is_folder = true
 ORDER BY created_at DESC;
 
 -- name: ListFilesByID :many
@@ -23,10 +23,15 @@ VALUES ($1, $2, $3, $4, $5, $6, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
 RETURNING *;
 
 -- name: CreateFolder :one
-INSERT INTO files (id, name, created_at, updated_at)
+INSERT INTO files (id, name, is_folder, created_at, updated_at)
-VALUES ($1, $2, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+VALUES ($1, $2, true, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
 RETURNING *;
 
+-- name: ListFilesByParentID :many
+SELECT * FROM files
+WHERE parent_file_id = $1
+ORDER BY is_folder DESC, created_at DESC;
+
 -- name: UpdateFile :exec
 UPDATE files
 SET name = $1, mime_type = $2, ocr_text = $3, updated_at = CURRENT_TIMESTAMP

backend/internal/db/tags.sql.go

@@ -64,7 +64,7 @@ func (q *Queries) DeleteTag(ctx context.Context, id string) error {
 }
 
 const getFilesByTagID = `-- name: GetFilesByTagID :many
-SELECT f.id, f.name, f.mime_type, f.size, f.storage_key, f.checksum, f.ocr_text, f.created_at, f.updated_at, f.parent_file_id FROM files f
+SELECT f.id, f.name, f.mime_type, f.size, f.storage_key, f.checksum, f.ocr_text, f.created_at, f.updated_at, f.parent_file_id, f.is_folder FROM files f
 JOIN file_tags ft ON f.id = ft.file_id
 WHERE ft.tag_id = $1
 ORDER BY f.created_at DESC
@@ -90,6 +90,7 @@ func (q *Queries) GetFilesByTagID(ctx context.Context, tagID sql.NullString) ([]
 			&i.CreatedAt,
 			&i.UpdatedAt,
 			&i.ParentFileID,
+			&i.IsFolder,
 		); err != nil {
 			return nil, err
 		}

backend/internal/handler/files.go

@@ -73,6 +73,7 @@ func (h *FileHandler) List(c *gin.Context) {
 		MimeType     string        `json:"mimeType"`
 		OcrText      string        `json:"ocrText,omitempty"`
 		ParentFileID string        `json:"parentFileID,omitempty"`
+		IsFolder     bool          `json:"isFolder"`
 		UpdatedAt    string        `json:"updatedAt"`
 	}
 
@@ -99,6 +100,7 @@ func (h *FileHandler) List(c *gin.Context) {
 			CreatedAt:    f.CreatedAt,
 			ParentFileID: f.ParentFileID,
 			OcrText:      f.OcrText,
+			IsFolder:     f.IsFolder,
 			UpdatedAt:    f.UpdatedAt,
 			MimeType:     f.MimeType,
 		}

backend/internal/model/file.go

@@ -15,9 +15,10 @@ type File struct {
 	Checksum     string `json:"-"`
 	OcrText      string `json:"ocrText,omitempty"`
 	Tags         []Tag  `json:"tags"`
+	IsFolder     bool   `json:"isFolder"`
+	ParentFileID string `json:"parentFileId,omitempty"`
 	CreatedAt    string `json:"createdAt"`
 	UpdatedAt    string `json:"updatedAt"`
-	ParentFileID string `json:"parentFileID,omitempty"`
 }
 
 type UploadResult struct {

backend/internal/service/file.go

@@ -176,6 +176,7 @@ func dbToModel(f db.File, dbTags []db.Tag) model.File {
 		StorageKey:   f.StorageKey,
 		Checksum:     f.Checksum,
 		OcrText:      f.OcrText,
+		IsFolder:     f.IsFolder,
 		ParentFileID: f.ParentFileID.String,
 		Tags:         tags,
 		CreatedAt:    f.CreatedAt.String(),

mobile/types/index.ts

@@ -7,12 +7,13 @@ export interface FileItem {
   updatedAt: string;
   ocrText?: string;
   tags: Tag[];
+  isFolder: boolean;
   parentFileId?: string;
   url?: string;
 }
 
 export function isFolder(file: FileItem): boolean {
-  return file.parentFileId != null;
+  return file.isFolder;
 }
 
 export interface Tag {