sssx/src/utils/getLocales.ts

Fast Svelte Static Site X – SSG/SSR focused on SEO for multi-million pages websites

import path from "node:path";
import { globbySync } from "globby";
import { type Config } from "../config.ts";
import ISO6391 from "iso-639-1";
import * as bcp from "bcp-47";
import { globEscape } from "./globEscape.ts";

const ALL_CODES = ISO6391.getAllCodes();

export const getDefaultLocales = (config: Config) => {
  return [config.defaultLocale];
};

export const getLocales = (file: string, config: Config, extension: string) => {
  let locales = getDefaultLocales(config);

  const filename = path.parse(file).name;

  const schema = bcp.parse(filename);
  const isLanguage = ALL_CODES.includes(schema.language as any);
  if (isLanguage) {
    let dir = globEscape(path.dirname(file));
    const pattern = `${dir}/*.${extension}`;
    const list = globbySync(pattern).map((a) => path.parse(a).name);

    locales = [...locales, ...list];
  }

  locales = locales.filter(
    (value, index, array) => array.indexOf(value) === index
  );

  return locales;
};