Function createCommentMap

curriculum/src/build-curriculum.ts:98–164

(
  dictionariesDir: string,
  targetDictionariesDir: string
)

 * @returns {Object} Object mapping English comment text to translations in all languages
 */
export function createCommentMap(
  dictionariesDir: string,
  targetDictionariesDir: string
): CommentDictionary {
  log(
    `Creating comment map from ${dictionariesDir} and ${targetDictionariesDir}`
  );
  const languages = readdirSync(targetDictionariesDir);

  const dictionaries = languages.reduce((acc, lang) => {
    const commentsPath = resolve(targetDictionariesDir, lang, 'comments.json');
    const commentsData = JSON.parse(readFileSync(commentsPath, 'utf8'));
    return {
      ...acc,
      [lang]: commentsData
    };
  }, {});

  const COMMENTS_TO_TRANSLATE = JSON.parse(
    readFileSync(resolve(dictionariesDir, 'english', 'comments.json'), 'utf8')
  ) as Record<string, string>;

  const COMMENTS_TO_NOT_TRANSLATE = JSON.parse(
    readFileSync(
      resolve(dictionariesDir, 'english', 'comments-to-not-translate.json'),
      'utf8'
    )
  ) as Record<string, string>;

  // map from english comment text to translations
  const translatedCommentMap = Object.entries(COMMENTS_TO_TRANSLATE).reduce(
    (acc, [id, text]) => {
      return {
        ...acc,
        [text]: getTranslationEntry(dictionaries, { engId: id, text })
      };
    },
    {} as CommentDictionary
  );

  // map from english comment text to itself
  const untranslatableCommentMap = Object.values(
    COMMENTS_TO_NOT_TRANSLATE
  ).reduce((acc, text) => {
    const englishEntry = languages.reduce(
      (acc, lang) => ({
        ...acc,
        [lang]: text
      }),
      {}
    );
    return {
      ...acc,
      [text]: englishEntry
    };
  }, {} as CommentDictionary);

  const allComments = { ...translatedCommentMap, ...untranslatableCommentMap };