feat: implement multi-root virtual filesystem

chfs-ng/internal/api/server.go

@@ -24,6 +24,7 @@ type Server struct {
 	Sessions   map[string]*auth.Account
 	WebDAVRoot string
 	Allow      string
+	MultiRoot  bool
 }
 type fileInfo struct {
 	Name      string `json:"name"`
@@ -74,13 +75,13 @@ func qpath(r *http.Request) string {
 }
 func permString(p auth.PermMask) string {
 	if p.HasDelete() {
-		return "d"
+		return "RWD"
 	}
 	if p.HasWrite() {
-		return "w"
+		return "RW"
 	}
 	if p.HasRead() {
-		return "r"
+		return "R"
 	}
 	return ""
 }
@@ -106,9 +107,10 @@ func (s *Server) files(w http.ResponseWriter, r *http.Request) {
 				sub = len(xs) > 0
 			}
 		}
-		out = append(out, fileInfo{Name: fi.Name(), Path: fp, Size: fi.Size(), Modified: fi.ModTime().Format(time.RFC3339), Dir: fi.IsDir(), Mask: permString(a.MaskFor(fp)), HasSubDir: sub})
+		out = append(out, fileInfo{Name: fi.Name(), Path: fp, Size: fi.Size(), Modified: fi.ModTime().Format(time.RFC3339), Dir: fi.IsDir(), Mask: permString(a.MaskFor(fp)), GuestMask: permString(s.Auth.Guest.MaskFor(fp)), HasSubDir: sub})
 	}
-	writeJSON(w, map[string]any{"files": out, "currentMask": permString(m), "virtualRoot": false})
+	virtual := p == "" && s.MultiRoot
+	writeJSON(w, map[string]any{"files": out, "currentMask": permString(m), "virtualRoot": virtual})
 }
 func (s *Server) newdir(w http.ResponseWriter, r *http.Request) {
 	_ = r.ParseMultipartForm(16 << 20)