@kiyoshiro/type-safe-path

type PathToParams = {
  "/posts": {
    query?: Record<string, string | number | string[] | number[]>
    hash?: string
  }
  "/posts/[id]": {
    params: { id: string | number }
    query?: Record<string, string | number | string[] | number[]>
    hash?: string
  }
}

/**
 * @example
 * $path('/posts/[id]', { params: { id: 1 }}) // => '/posts/1'
 */
export function $path<Path extends keyof PathToParams>(
  path: Path,
  args: PathToParams[Path]
): string {
  return (
    path.replace(/\[(\w+)\]/g, (_, key) => (args as any).params[key]) +
    (args.query
      ? "?" + new URLSearchParams(args.query as any).toString()
      : "") +
    (args.hash ? "#" + args.hash : "")
  )
}

/**
 * @example
 * $echoPath('/posts/[id]') // => '/posts/[id]'
 */
export function $echoPath<Path extends keyof PathToParams>(path: Path): string {
  return path
}