import config from "config";
import {nanoid} from "nanoid";
import {ServerError} from "swaf/HttpError";

import FileModel from "./models/FileModel.js";

export default async function generateSlug(tries: number): Promise<string> {
    let i = 0;
    do {
        const slug = nanoid(config.get<number>('newlyGeneratedSlugSize'));
        if (!await FileModel.getBySlug(slug)) {
            return slug;
        }
        i++;
    } while (i < tries);
    throw new ServerError('Failed to generate slug; newly generated slug size should be increased by 1.');
}