feat(files): dedupe by stem|ext + oo projects files dedupe

- FileDedupKey groups true duplicates (same name+extension)
- put-md --replace deletes matching stem|ext only (not other formats)
- oo projects files dedupe PROJECT_ID [--apply] [--cross]
- Cross-folder mode prefers non-_trash folders, keeps newest file

Co-authored-by: Cursor <cursoragent@cursor.com>

AGENTS.md

@@ -28,7 +28,7 @@ Canonical Go client for OnlyOffice Workspace (Projects + Calendar + CRM) and the
 - Prefer `ResponseObject` / `postFormObject` / `putFormObject` / `deleteObject` over hand-rolled `json.Unmarshal(responseField(...))` blocks — they exist for DRY, use them.
 - Domain split is by file, **not** by subpackage. Don't introduce `internal/` or `pkg/*` subpackages inside the library — it flattens the `*Client` call surface for a reason.
 - CLI commands follow **subject → verb** structure (`oo <subject> <verb>`), never `oo <verb>-<subject>`. Add new commands to the existing subject file if one fits; create a new `cmd/oo/<subject>.go` for a genuinely new domain.
-- **Documents for agents:** prefer Markdown in git; OnlyOffice UI is weak for `.md`. Use `oo docs put-md` (md→docx upload, `--replace` default upserts by stem) and `oo docs as-md` (download→OCR if needed→markdown). Local converters live in `internal/docpipe` (pandoc / ocrmypdf / pdftotext / tesseract+go-hocr). For layout-aware extracts: `oo docs hocr` (or `as-md --hocr`). OO UI may show `title`+`fileExst` as double extension (e.g. `.docx.docx`) — cosmetic server quirk.
+- **Documents for agents:** prefer Markdown in git; OnlyOffice UI is weak for `.md`. Use `oo docs put-md` (md→docx upload, `--replace` default upserts by stem|ext) and `oo docs as-md` (download→OCR if needed→markdown). `oo projects files dedupe PROJECT_ID` reports/removes duplicate stem|ext copies (`--apply`, `--cross`). Local converters live in `internal/docpipe` (pandoc / ocrmypdf / pdftotext / tesseract+go-hocr). For layout-aware extracts: `oo docs hocr` (or `as-md --hocr`). OO UI may show `title`+`fileExst` as double extension (e.g. `.docx.docx`) — cosmetic server quirk.
 - Every table output goes through `printTable(headers, rows)`; every single-object through `printObject(v)`. Do not `fmt.Println` rows ad-hoc or the `--output json` flag breaks for that command.
 - No secrets in the repo; use `.env` (gitignored). Commit `.env.example` only.
 - Follow SemVer on tags; this repo is tagged at GitHub under `git@github.com:eSlider/go-onlyoffice.git`.

README.md

@@ -611,6 +611,9 @@ oo projects files upload 33 ./notes.docx
 oo projects files download 12345 --to ./copy.docx
 oo projects files rename 12345 notes-v2.docx
 oo projects files delete 12345
+oo projects files dedupe 7              # dry-run duplicate report
+oo projects files dedupe 7 --apply      # remove older stem|ext copies per folder
+oo projects files dedupe 7 --cross --apply  # cross-folder; keep non-_trash
 
 # Agent document pipeline (md in git ↔ docx in OO; OCR scans)
 oo docs tools

cmd/oo/projects_files.go

@@ -24,6 +24,7 @@ func projectFilesCmd() *cobra.Command {
 	cmd.AddCommand(prjFilesDownloadCmd())
 	cmd.AddCommand(prjFilesRenameCmd())
 	cmd.AddCommand(prjFilesDeleteCmd())
+	cmd.AddCommand(prjFilesDedupeCmd())
 	// Convenience aliases into oo docs (md↔docx / OCR pipeline).
 	cmd.AddCommand(aliasDocsAsMD())
 	cmd.AddCommand(aliasDocsPutMD())
@@ -201,6 +202,62 @@ func prjFilesDeleteCmd() *cobra.Command {
 	}
 }
 
+func prjFilesDedupeCmd() *cobra.Command {
+	var apply, cross bool
+	cmd := &cobra.Command{
+		Use:   "dedupe PROJECT_ID",
+		Short: "Find (and optionally remove) duplicate files in project Documents folders",
+		Long: `Duplicates share the same logical name: stem|ext (OO title+fileExst).
+
+Default: dry-run report. Pass --apply to delete older copies (keeps newest; --cross prefers non-trash folders).`,
+		Args: cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			c, err := newOO(cmd)
+			if err != nil {
+				return err
+			}
+			groups, deleted, err := c.DedupeProject(cmd.Context(), args[0], onlyoffice.DedupOptions{
+				CrossFolder: cross,
+			}, apply)
+			if err != nil {
+				return err
+			}
+			rows := make([]map[string]any, 0, len(groups))
+			for _, g := range groups {
+				row := map[string]any{
+					"key":          g.Key,
+					"folder_id":    g.FolderID,
+					"folder_title": g.FolderTitle,
+					"keep_id":      fileIDStr(g.Keep),
+					"keep_title":   onlyoffice.FileEntryTitle(g.Keep),
+					"remove_count": len(g.Remove),
+				}
+				removeIDs := make([]string, 0, len(g.Remove))
+				for _, f := range g.Remove {
+					removeIDs = append(removeIDs, fileIDStr(f))
+				}
+				row["remove_ids"] = removeIDs
+				rows = append(rows, row)
+			}
+			out := map[string]any{
+				"project_id": args[0],
+				"dry_run":    !apply,
+				"cross":      cross,
+				"groups":     len(groups),
+				"duplicates": rows,
+			}
+			if apply {
+				out["deleted_ids"] = deleted
+			}
+			printObject(out)
+			return nil
+		},
+	}
+	cmd.Flags().BoolVar(&apply, "apply", false, "delete duplicate files (default: report only)")
+	cmd.Flags().BoolVar(&cross, "cross", false, "also dedupe same stem|ext across folders (prefers non-_trash)")
+	return cmd
+}
+
 func fileEntryRows(files []*onlyoffice.FileEntry) []map[string]any {
 	rows := make([]map[string]any, 0, len(files))
 	for _, f := range files {

files_dedupe.go

@@ -0,0 +1,337 @@
+package onlyoffice
+
+import (
+	"context"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+// FileEntryExt returns a normalized extension (lowercase, with leading dot).
+func FileEntryExt(f *FileEntry) string {
+	if f == nil {
+		return ""
+	}
+	exst := ""
+	if f.FileExst != nil {
+		exst = strings.TrimSpace(*f.FileExst)
+	}
+	if exst != "" {
+		if !strings.HasPrefix(exst, ".") {
+			exst = "." + exst
+		}
+		return strings.ToLower(exst)
+	}
+	if f.Title != nil {
+		if ext := filepath.Ext(*f.Title); ext != "" {
+			return strings.ToLower(ext)
+		}
+	}
+	return ""
+}
+
+// FileDedupKey is stem|ext — two files with the same key are duplicates.
+func FileDedupKey(f *FileEntry) string {
+	st := FileEntryStem(f)
+	ext := FileEntryExt(f)
+	if st == "" {
+		return ""
+	}
+	if ext == "" {
+		return st
+	}
+	return st + "|" + strings.TrimPrefix(ext, ".")
+}
+
+// FindFilesByDedupKey returns folder files matching stem and extension.
+func FindFilesByDedupKey(files []*FileEntry, stem, ext string) []*FileEntry {
+	key := dedupKeyFromParts(stem, ext)
+	if key == "" {
+		return nil
+	}
+	var out []*FileEntry
+	for _, f := range files {
+		if FileDedupKey(f) == key {
+			out = append(out, f)
+		}
+	}
+	return out
+}
+
+func dedupKeyFromParts(stem, ext string) string {
+	stem = strings.TrimSpace(stem)
+	if stem == "" {
+		return ""
+	}
+	ext = strings.ToLower(strings.TrimSpace(ext))
+	if ext != "" && !strings.HasPrefix(ext, ".") {
+		ext = "." + ext
+	}
+	if ext == "" {
+		return stem
+	}
+	return stem + "|" + strings.TrimPrefix(ext, ".")
+}
+
+// UploadExtFromLocal returns the lowercase extension from a local path.
+func UploadExtFromLocal(localPath string) string {
+	ext := filepath.Ext(localPath)
+	if ext == "" {
+		return ""
+	}
+	return strings.ToLower(ext)
+}
+
+// IsTrashFolderTitle reports staging/trash folders (e.g. _trash-md).
+func IsTrashFolderTitle(title string) bool {
+	t := strings.ToLower(strings.TrimSpace(title))
+	return strings.HasPrefix(t, "_") || strings.Contains(t, "trash")
+}
+
+// ProjectFolderFile ties a file to its project Documents subfolder.
+type ProjectFolderFile struct {
+	FolderID    string
+	FolderTitle string
+	File        *FileEntry
+}
+
+// DedupGroup is one duplicate set: keep the newest (or non-trash) file.
+type DedupGroup struct {
+	Key         string
+	FolderID    string
+	FolderTitle string
+	Keep        *FileEntry
+	Remove      []*FileEntry
+}
+
+// DedupOptions controls project-wide duplicate scans.
+type DedupOptions struct {
+	CrossFolder bool
+}
+
+// FindProjectDuplicates scans project folders for duplicate files.
+func FindProjectDuplicates(folders []*FolderEntry, filesByFolder map[string][]*FileEntry, opts DedupOptions) []DedupGroup {
+	var indexed []ProjectFolderFile
+	for _, folder := range folders {
+		if folder == nil || folder.ID == nil {
+			continue
+		}
+		fid := folder.ID.String()
+		title := ""
+		if folder.Title != nil {
+			title = *folder.Title
+		}
+		for _, f := range filesByFolder[fid] {
+			if f == nil {
+				continue
+			}
+			indexed = append(indexed, ProjectFolderFile{
+				FolderID: fid, FolderTitle: title, File: f,
+			})
+		}
+	}
+	if opts.CrossFolder {
+		return findCrossFolderDuplicates(indexed)
+	}
+	return findWithinFolderDuplicates(indexed)
+}
+
+func findWithinFolderDuplicates(indexed []ProjectFolderFile) []DedupGroup {
+	byFolder := map[string][]ProjectFolderFile{}
+	for _, it := range indexed {
+		byFolder[it.FolderID] = append(byFolder[it.FolderID], it)
+	}
+	var out []DedupGroup
+	for fid, items := range byFolder {
+		title := ""
+		if len(items) > 0 {
+			title = items[0].FolderTitle
+		}
+		byKey := map[string][]*FileEntry{}
+		for _, it := range items {
+			k := FileDedupKey(it.File)
+			byKey[k] = append(byKey[k], it.File)
+		}
+		for k, group := range byKey {
+			if len(group) < 2 {
+				continue
+			}
+			keep, remove := pickDuplicateKeeper(group, false)
+			if keep == nil || len(remove) == 0 {
+				continue
+			}
+			out = append(out, DedupGroup{
+				Key: k, FolderID: fid, FolderTitle: title, Keep: keep, Remove: remove,
+			})
+		}
+	}
+	sortDedupGroups(out)
+	return out
+}
+
+func findCrossFolderDuplicates(indexed []ProjectFolderFile) []DedupGroup {
+	byKey := map[string][]ProjectFolderFile{}
+	for _, it := range indexed {
+		k := FileDedupKey(it.File)
+		byKey[k] = append(byKey[k], it)
+	}
+	var out []DedupGroup
+	for k, items := range byKey {
+		if len(items) < 2 {
+			continue
+		}
+		files := make([]*FileEntry, len(items))
+		folders := make([]string, len(items))
+		folderTitles := make([]string, len(items))
+		for i, it := range items {
+			files[i] = it.File
+			folders[i] = it.FolderID
+			folderTitles[i] = it.FolderTitle
+		}
+		keep, remove := pickDuplicateKeeperWithFolders(files, folders, folderTitles)
+		if keep == nil || len(remove) == 0 {
+			continue
+		}
+		fid, ftitle := "", ""
+		for _, it := range items {
+			if it.File == keep {
+				fid, ftitle = it.FolderID, it.FolderTitle
+				break
+			}
+		}
+		out = append(out, DedupGroup{
+			Key: k, FolderID: fid, FolderTitle: ftitle, Keep: keep, Remove: remove,
+		})
+	}
+	sortDedupGroups(out)
+	return out
+}
+
+func pickDuplicateKeeper(files []*FileEntry, _ bool) (*FileEntry, []*FileEntry) {
+	return pickDuplicateKeeperWithFolders(files, nil, nil)
+}
+
+func pickDuplicateKeeperWithFolders(files []*FileEntry, folderIDs, folderTitles []string) (*FileEntry, []*FileEntry) {
+	if len(files) == 0 {
+		return nil, nil
+	}
+	type ranked struct {
+		file  *FileEntry
+		trash bool
+	}
+	rankedFiles := make([]ranked, len(files))
+	for i, f := range files {
+		trash := false
+		if folderTitles != nil && i < len(folderTitles) {
+			trash = IsTrashFolderTitle(folderTitles[i])
+		}
+		rankedFiles[i] = ranked{file: f, trash: trash}
+	}
+	sort.SliceStable(rankedFiles, func(i, j int) bool {
+		ri, rj := rankedFiles[i], rankedFiles[j]
+		if ri.trash != rj.trash {
+			return !ri.trash // non-trash first
+		}
+		ti, tj := rankedFiles[i].file.Updated, rankedFiles[j].file.Updated
+		if ti == nil {
+			return false
+		}
+		if tj == nil {
+			return true
+		}
+		return ti.After(*tj) // newest first
+	})
+	keep := rankedFiles[0].file
+	var remove []*FileEntry
+	for _, r := range rankedFiles[1:] {
+		remove = append(remove, r.file)
+	}
+	return keep, remove
+}
+
+func sortDedupGroups(groups []DedupGroup) {
+	sort.Slice(groups, func(i, j int) bool {
+		if groups[i].FolderTitle != groups[j].FolderTitle {
+			return groups[i].FolderTitle < groups[j].FolderTitle
+		}
+		return groups[i].Key < groups[j].Key
+	})
+}
+
+// ApplyDedupGroups deletes Remove files from each group.
+func (c *Client) ApplyDedupGroups(ctx context.Context, groups []DedupGroup) ([]int, error) {
+	seen := map[int]struct{}{}
+	var ids []int
+	for _, g := range groups {
+		for _, f := range g.Remove {
+			n := int(FileEntryNumericID(f))
+			if n == 0 {
+				continue
+			}
+			if _, ok := seen[n]; ok {
+				continue
+			}
+			seen[n] = struct{}{}
+			ids = append(ids, n)
+		}
+	}
+	if len(ids) == 0 {
+		return nil, nil
+	}
+	if err := c.DeleteFiles(ctx, ids); err != nil {
+		return ids, err
+	}
+	return ids, nil
+}
+
+// DeleteFilesByDedupKey removes all files in folderID matching stem+ext.
+func (c *Client) DeleteFilesByDedupKey(ctx context.Context, folderID, stem, ext string) ([]int, error) {
+	files, err := c.FolderFiles(ctx, folderID)
+	if err != nil {
+		return nil, err
+	}
+	matches := FindFilesByDedupKey(files, stem, ext)
+	if len(matches) == 0 {
+		return nil, nil
+	}
+	ids := make([]int, 0, len(matches))
+	for _, f := range matches {
+		n := int(FileEntryNumericID(f))
+		if n != 0 {
+			ids = append(ids, n)
+		}
+	}
+	if len(ids) == 0 {
+		return nil, nil
+	}
+	if err := c.DeleteFiles(ctx, ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// DedupeProject scans project folders and optionally deletes duplicates.
+func (c *Client) DedupeProject(ctx context.Context, projectID string, opts DedupOptions, apply bool) ([]DedupGroup, []int, error) {
+	pf, err := c.GetProjectFiles(ctx, projectID)
+	if err != nil {
+		return nil, nil, err
+	}
+	filesByFolder := make(map[string][]*FileEntry, len(pf.Folders))
+	for _, folder := range pf.Folders {
+		if folder == nil || folder.ID == nil {
+			continue
+		}
+		fid := folder.ID.String()
+		files, err := c.FolderFiles(ctx, fid)
+		if err != nil {
+			return nil, nil, err
+		}
+		filesByFolder[fid] = files
+	}
+	groups := FindProjectDuplicates(pf.Folders, filesByFolder, opts)
+	if !apply || len(groups) == 0 {
+		return groups, nil, nil
+	}
+	deleted, err := c.ApplyDedupGroups(ctx, groups)
+	return groups, deleted, err
+}

files_dedupe_test.go

@@ -0,0 +1,81 @@
+package onlyoffice
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+func TestFileDedupKey(t *testing.T) {
+	title := "OO-HONDA-7-INDEX.docx"
+	exst := ".docx"
+	f := &FileEntry{Title: &title, FileExst: &exst}
+	if got := FileDedupKey(f); got != "OO-HONDA-7-INDEX|docx" {
+		t.Fatalf("got %q", got)
+	}
+}
+
+func TestFindFilesByDedupKey(t *testing.T) {
+	a := &FileEntry{Title: strPtr("foo.docx"), FileExst: strPtr(".docx")}
+	b := &FileEntry{Title: strPtr("foo.md"), FileExst: strPtr(".md")}
+	files := []*FileEntry{a, b}
+	got := FindFilesByDedupKey(files, "foo", ".docx")
+	if len(got) != 1 || got[0] != a {
+		t.Fatalf("got %+v", got)
+	}
+}
+
+func TestFindWithinFolderDuplicates(t *testing.T) {
+	t1 := time.Date(2026, 8, 27, 16, 0, 0, 0, time.UTC)
+	t2 := t1.Add(time.Hour)
+	old := &FileEntry{ID: jsonNum("1"), Title: strPtr("idx.docx"), FileExst: strPtr(".docx"), Updated: &t1}
+	new := &FileEntry{ID: jsonNum("2"), Title: strPtr("idx.docx"), FileExst: strPtr(".docx"), Updated: &t2}
+	indexed := []ProjectFolderFile{
+		{FolderID: "490", FolderTitle: "00-Index", File: old},
+		{FolderID: "490", FolderTitle: "00-Index", File: new},
+	}
+	groups := findWithinFolderDuplicates(indexed)
+	if len(groups) != 1 {
+		t.Fatalf("groups=%d", len(groups))
+	}
+	if FileEntryNumericID(groups[0].Keep) != 2 {
+		t.Fatalf("keep id=%d", FileEntryNumericID(groups[0].Keep))
+	}
+	if len(groups[0].Remove) != 1 || FileEntryNumericID(groups[0].Remove[0]) != 1 {
+		t.Fatalf("remove=%v", groups[0].Remove)
+	}
+}
+
+func TestCrossFolderPrefersNonTrash(t *testing.T) {
+	t1 := time.Date(2026, 8, 27, 18, 0, 0, 0, time.UTC)
+	t2 := t1.Add(-time.Hour)
+	trash := &FileEntry{ID: jsonNum("10"), Title: strPtr("INDEX.md"), FileExst: strPtr(".md"), Updated: &t1}
+	good := &FileEntry{ID: jsonNum("20"), Title: strPtr("INDEX.md"), FileExst: strPtr(".md"), Updated: &t2}
+	indexed := []ProjectFolderFile{
+		{FolderID: "493", FolderTitle: "_trash-md", File: trash},
+		{FolderID: "492", FolderTitle: "OCR", File: good},
+	}
+	groups := findCrossFolderDuplicates(indexed)
+	if len(groups) != 1 {
+		t.Fatalf("groups=%d", len(groups))
+	}
+	if FileEntryNumericID(groups[0].Keep) != 20 {
+		t.Fatalf("keep id=%d", FileEntryNumericID(groups[0].Keep))
+	}
+}
+
+func TestIsTrashFolderTitle(t *testing.T) {
+	if !IsTrashFolderTitle("_trash-md") {
+		t.Fatal("expected trash")
+	}
+	if IsTrashFolderTitle("00-Index") {
+		t.Fatal("expected not trash")
+	}
+}
+
+func strPtr(s string) *string { return &s }
+
+func jsonNum(s string) *json.Number {
+	n := json.Number(s)
+	return &n
+}

files_stem.go

@@ -89,7 +89,8 @@ func FindFilesByStem(files []*FileEntry, stem string) []*FileEntry {
 	return out
 }
 
-// DeleteFilesByStem removes all files in folderID matching stem (for put-md upsert).
+// DeleteFilesByStem removes all files in folderID matching stem (any extension).
+// Prefer DeleteFilesByDedupKey when the upload extension is known.
 func (c *Client) DeleteFilesByStem(ctx context.Context, folderID, stem string) ([]int, error) {
 	files, err := c.FolderFiles(ctx, folderID)
 	if err != nil {
@@ -115,10 +116,11 @@ func (c *Client) DeleteFilesByStem(ctx context.Context, folderID, stem string) (
 	return ids, nil
 }
 
-// UploadToFolderReplacing deletes same-stem files then uploads localPath.
+// UploadToFolderReplacing deletes same stem+ext files then uploads localPath.
 func (c *Client) UploadToFolderReplacing(ctx context.Context, folderID, localPath string) (*FileEntry, []int, error) {
 	stem := UploadStemFromLocal(localPath)
-	deleted, err := c.DeleteFilesByStem(ctx, folderID, stem)
+	ext := UploadExtFromLocal(localPath)
+	deleted, err := c.DeleteFilesByDedupKey(ctx, folderID, stem, ext)
 	if err != nil {
 		return nil, deleted, err
 	}