chapter-tracker/src/index.ts

import { getAllChapters, getLatestChapter } from './mangadex/chapters';
import { getManga } from './mangadex/manga';
import { getCover } from './mangadex/cover';
import { lazyKv } from './db/lazyKv';
import { sendWebhook } from './utils/webhook';
import { ChapterId } from './types';
import { getMangaToFetch } from './utils/get-manga-to-fetch';
import { getMangaTitle } from './utils/get-manga-title';

const config = new lazyKv('./config.json');
const mangaHistory = new lazyKv('./mangaHistory.json');

void (async () => {
  const checkInterval = await config.get<number>('checkInterval', 900);
  const userAgent = await config.get<string>(
    'userAgent',
    'https://git.pfy.ch/pfych/chapter-tracker (Missing custom userAgent? User Miss-configured!)',
  );

  const checkForUpdates = async () => {
    const { uniqueMangaIds, mangaIdsToWebhooks } =
      await getMangaToFetch(config);

    for (const mangaId of uniqueMangaIds) {
      const lastChapterId = await mangaHistory.get<ChapterId>(mangaId);

      const manga = await getManga(mangaId, userAgent);
      const chapters = await getAllChapters(mangaId, userAgent);
      const latestChapter = getLatestChapter(chapters);
      const cover = await getCover(manga, userAgent);
      const title = getMangaTitle(manga);

      if (lastChapterId !== latestChapter.id) {
        console.log('Update found for manga:', title);

        const webhooksForManga = mangaIdsToWebhooks[mangaId];

        await Promise.all(
          webhooksForManga.map(
            async (webhookUrl) =>
              await sendWebhook({
                webhookUrl,
                manga,
                latestChapter,
                cover,
              }),
          ),
        );

        await mangaHistory.set(mangaId, latestChapter.id);
      } else {
        console.log('No Updates found for manga:', title);
      }
    }
  };

  setInterval(() => void checkForUpdates(), checkInterval * 1000);
  await checkForUpdates();
})();