fix(docs): put-md upsert by stem to avoid duplicate folder files

UploadToFolderReplacing deletes same-stem files before upload (--replace,
default true). OO may still display title+fileExst as double extension.

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

files_stem.go

@@ -0,0 +1,127 @@
+package onlyoffice
+
+import (
+	"context"
+	"encoding/json"
+	"path/filepath"
+	"strings"
+)
+
+// FileEntryStem returns the logical basename without duplicated extensions.
+// OO often stores title="foo.docx" and fileExst=".docx" (UI shows foo.docx.docx).
+func FileEntryStem(f *FileEntry) string {
+	if f == nil || f.Title == nil {
+		return ""
+	}
+	exst := ""
+	if f.FileExst != nil {
+		exst = *f.FileExst
+	}
+	return NormalizeUploadStem(*f.Title, exst)
+}
+
+// NormalizeUploadStem derives a stable stem for matching uploads.
+func NormalizeUploadStem(title, exst string) string {
+	t := strings.TrimSpace(title)
+	t = strings.TrimSuffix(t, ".")
+	if exst != "" && strings.HasSuffix(t, exst) {
+		t = strings.TrimSuffix(t, exst)
+	}
+	if ext := filepath.Ext(t); ext != "" {
+		t = strings.TrimSuffix(t, ext)
+	}
+	return strings.TrimSpace(t)
+}
+
+// UploadStemFromLocal returns the stem used to match/replace folder files.
+func UploadStemFromLocal(localPath string) string {
+	base := filepath.Base(localPath)
+	ext := filepath.Ext(base)
+	if ext != "" {
+		base = strings.TrimSuffix(base, ext)
+	}
+	return base
+}
+
+// FolderFiles returns file entries in a Documents folder.
+func (c *Client) FolderFiles(ctx context.Context, folderID string) ([]*FileEntry, error) {
+	raw, err := c.ListFolder(ctx, folderID)
+	if err != nil {
+		return nil, err
+	}
+	return ParseFolderFileEntries(raw), nil
+}
+
+// ParseFolderFileEntries extracts []*FileEntry from ListFolder JSON.
+func ParseFolderFileEntries(raw map[string]any) []*FileEntry {
+	items, _ := raw["files"].([]any)
+	out := make([]*FileEntry, 0, len(items))
+	for _, it := range items {
+		m, ok := it.(map[string]any)
+		if !ok {
+			continue
+		}
+		b, err := json.Marshal(m)
+		if err != nil {
+			continue
+		}
+		var f FileEntry
+		if err := json.Unmarshal(b, &f); err != nil {
+			continue
+		}
+		out = append(out, &f)
+	}
+	return out
+}
+
+// FindFilesByStem returns folder files whose logical stem matches.
+func FindFilesByStem(files []*FileEntry, stem string) []*FileEntry {
+	stem = strings.TrimSpace(stem)
+	if stem == "" {
+		return nil
+	}
+	var out []*FileEntry
+	for _, f := range files {
+		if FileEntryStem(f) == stem {
+			out = append(out, f)
+		}
+	}
+	return out
+}
+
+// DeleteFilesByStem removes all files in folderID matching stem (for put-md upsert).
+func (c *Client) DeleteFilesByStem(ctx context.Context, folderID, stem string) ([]int, error) {
+	files, err := c.FolderFiles(ctx, folderID)
+	if err != nil {
+		return nil, err
+	}
+	matches := FindFilesByStem(files, stem)
+	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
+}
+
+// UploadToFolderReplacing deletes same-stem 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)
+	if err != nil {
+		return nil, deleted, err
+	}
+	ent, err := c.UploadToFolder(ctx, folderID, localPath)
+	return ent, deleted, err
+}