backend/src/utils.ts

import { join, dirname } from "path";
import { fileURLToPath } from "url";

const __dirname = dirname(fileURLToPath(import.meta.url));

const DEFAULT_DATA_DIR = join(__dirname, "..", "data");

let _dataDir: string | undefined;

/** Override DATA_DIR for testing. Pass undefined to reset to default. */
export function setDataDir(dir: string | undefined) {
  _dataDir = dir;
}

export function getDataDir(): string {
  return _dataDir ?? process.env.DATA_DIR ?? DEFAULT_DATA_DIR;
}

/** @deprecated Use getDataDir() instead */
export const DATA_DIR = DEFAULT_DATA_DIR;

export function sanitizeName(name: string): string {
  return name.replace(/[^a-zA-Z0-9_-]/g, "_");
}

export function docPath(name: string): string {
  return join(getDataDir(), `${sanitizeName(name)}.yjs`);
}