blitzkit/packages/scripts/src/applyPatches.ts

import { dvp } from "@blitzkit/closed";
import { assertSecret } from "@blitzkit/core";
import { mkdir, writeFile } from "fs/promises";
import { parse as parsePath } from "path";
import ProgressBar from "progress";
import { parse as parseYaml, stringify as stringifyYaml } from "yaml";
import { vfs } from "./buildAssets/constants";
import { writeDVPL } from "./core/blitz/writeDVPL";

const versionTextFile = await vfs.text(`Data/version.txt`);
const currentVersion = versionTextFile
  .split(" ")[0]
  .split(".")
  .slice(0, 3)
  .join(".");

console.log(`Installing patches for ${currentVersion}...`);

let patchIndex = 1;
while (true) {
  const response = await fetch(
    `${assertSecret(
      import.meta.env.WOTB_DLC_CDN
    )}/dlc/s${currentVersion}_${patchIndex}.yaml`
  );

  if (response.status === 200) {
    console.log(`Applying patch ${patchIndex}...`);

    const data = parseYaml(await response.text());
    const dvpm = await fetch(
      `${assertSecret(import.meta.env.WOTB_DLC_CDN)}/dlc/${data.dx11}`
    ).then((response) => response.arrayBuffer());
    const dvpd = await fetch(
      `${assertSecret(import.meta.env.WOTB_DLC_CDN)}/dlc/${data.dx11.replace(
        ".dvpm",
        ".dvpd"
      )}`
    ).then((response) => response.arrayBuffer());
    const files = await dvp(dvpm, dvpd);
    const bar = new ProgressBar(
      `Patching ${files.length} files :bar`,
      files.length
    );

    for (const { path, data } of files) {
      console.log(`Patching "${path}"...`);

      const { dir } = parsePath(path);

      try {
        await mkdir(`Data/${dir}`, { recursive: true });
      } catch (error) {
        console.warn(`Failed to make directory "${dir}"`);
      }

      const isDvpl = path.endsWith(".dvpl");
      const buffer = Buffer.from(data);

      await writeFile(
        `Data/${path}${isDvpl ? "" : ".dvpl"}`,
        new Uint8Array(isDvpl ? buffer : writeDVPL(buffer))
      );

      bar.tick();
    }

    if ("dynamicContentLocalizationsDir" in data) {
      console.log("Found dynamic content localizations; patching...");

      const localizationsResponse = await fetch(
        `${assertSecret(import.meta.env.WOTB_DLC_CDN)}/dlc/${
          data.dynamicContentLocalizationsDir
        }/en.yaml`
      );
      const newStrings = parseYaml(await localizationsResponse.text());
      const oldStrings = await vfs.yaml<Record<string, string>>(
        `Data/Strings/en.yaml`
      );
      const patchedStrings = { ...oldStrings, ...newStrings };
      const patchedContent = stringifyYaml(patchedStrings);

      await writeFile(
        `Data/Strings/en.yaml`,
        new Uint8Array(writeDVPL(Buffer.from(patchedContent)))
      );
    }

    patchIndex++;
  } else break;
}