Can generate random new file name

src/utils/UserDataUtils.ts

@@ -1,6 +1,7 @@
 import { conf } from "../helpers/ConfigHelper";
 import { join } from "path";
 import { existsSync, mkdirSync, writeFileSync } from "fs";
+import { randomStr } from "./CryptUtils";
 
 /**
  * User data utilities
@@ -52,4 +53,26 @@ export function prepareFileCreation(userID: number, folderName: string) : string
 	}
 
 	return subfolder;
+}
+
+/**
+ * Generate a new file name in order to create a new file
+ * 
+ * @param dir Target directory
+ * @param ext File extension
+ * @returns Generated file name (including dir)
+ */
+export function generateNewUserDataFileName(dir: string, ext: string) : string {
+	const sys_dir = pathUserData(dir, true);
+
+	if(!existsSync(sys_dir))
+		throw Error("Trying to create file into " + sys_dir + " but this directory does not exists!");
+	
+	// Generate random file name
+	let filename : string;
+	do {
+		filename = randomStr(25) + "." + ext;
+	} while(existsSync(join(sys_dir, filename)));
+
+	return join(dir, filename);
 }