Numerous Bug Fixes

backend/handlers/utils.go

@@ -0,0 +1,28 @@
+package handlers
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// GetUniquePath checks if a file or folder exists at the given baseDir with the given name.
+// If it does, it systematically appends " (1)", " (2)", etc., until it finds an available name.
+// It returns the unique filename.
+func GetUniquePath(baseDir, name string) string {
+	ext := filepath.Ext(name)
+	base := name[:len(name)-len(ext)]
+
+	finalPath := filepath.Join(baseDir, name)
+	if _, err := os.Stat(finalPath); os.IsNotExist(err) {
+		return name
+	}
+
+	for i := 1; ; i++ {
+		newName := fmt.Sprintf("%s (%d)%s", base, i, ext)
+		finalPath = filepath.Join(baseDir, newName)
+		if _, err := os.Stat(finalPath); os.IsNotExist(err) {
+			return newName
+		}
+	}
+}