converting .json with linked image files

[iway1]

I have a lottie file where the .json includes links to other assets. IE the file includes this:

"assets":[{"id":"image_0","w":2000,"h":2000,"u":"","p":"image_0.png","e":1},{"id":"image_1","w":2000,"h":2000,"u":"","p":"image_1.png","e":1},{"id":"image_2","w":2000,"h":2000,"u":"","p":"image_2.png","e":1},{"id":"image_3","w":2000,"h":2000,"u":"","p":"image_3.png","e":1},{"id":"image_4","w":2000,"h":2000,"u":"","p":"image_4.png","e":1},{"id":"image_5","w":2000,"h":2000,"u":"","p":"image_5.png","e":1},{"id":"image_6","w":2000,"h":2000,"u":"","p":"image_6.png","e":1},{"id":"image_7","w":2000,"h":2000,"u":"","p":"image_7.png","e":1},{"id":"image_8","w":2000,"h":2000,"u":"","p":"image_8.png","e":1},{"id":"image_9","w":2000,"h":2000,"u":"","p":"image_9.png","e":1},{"id":"image_10","w":2000,"h":2000,"u":"","p":"image_10.png","e":1},{"id":"image_11","w":2000,"h":2000,"u":"","p":"image_11.png","e":1},{"id":"image_12","w":2000,"h":2000,"u":"","p":"image_12.png","e":1},{"id":"image_13","w":2000,"h":2000,"u":"","p":"image_13.png","e":1},{"id":"image_14","w":2000,"h":2000,"u":"","p":"image_14.png","e":1},{"id":"image_15","w":2000,"h":2000,"u":"","p":"image_15.png","e":1},{"id":"image_16","w":2000,"h":2000,"u":"","p":"image_16.png","e":1},{"id":"image_17","w":2000,"h":2000,"u":"","p":"image_17.png","e":1},{"id":"image_18","w":2000,"h":2000,"u":"","p":"image_18.png","e":1},{"id":"image_19","w":2000,"h":2000,"u":"","p":"image_19.png","e":1},{"id":"image_20","w":2000,"h":2000,"u":"","p":"image_20.png","e":1},{"id":"image_21","w":2000,"h":2000,"u":"","p":"image_21.png","e":1},{"id":"image_22","w":2000,"h":2000,"u":"","p":"image_22.png","e":1},{"id":"image_23","w":2000,"h":2000,"u":"","p":"image_23.png","e":1}]

I'd like to convert it to a file that includes the images as base64 so that I don't have to mess with native config. Is there a straightforward way to do that?

[iway1]

Was able to create a script for it - just replace the p property with the base 64:

import fs from "node:fs";
import { program } from "commander";

program
  .option("-i, --injectFile <inject file>", "Destination file")
  .option("-s, --sourceDir <source directory>", "Source directory")
  .option("-o, --outputFile <output directory>", "Inject file");

type OptionsType = {
  injectFile?: string;
  sourceDir?: string;
};

type PartialLottieFile = {
  assets: { p: string }[];
};

program.parse();

const options = program.opts() as OptionsType;
if (!(options.injectFile && options.sourceDir))
  throw new Error("Pass all options plz.");

const dir = fs.readdirSync(options.sourceDir);
const overwriteMap: { [fileName: string]: string } = {};
dir.forEach((e) => {
  const r =
    "data:image/png;base64," +
    fs.readFileSync(`${options.sourceDir}/${e}`, { encoding: "base64" });
  overwriteMap[e] = r;
});

const lottieJson = JSON.parse(
  fs.readFileSync(options.injectFile).toString()
) as PartialLottieFile;
lottieJson.assets = lottieJson.assets.map((e) => {
  return { ...e, p: overwriteMap[e.p] };
});
fs.writeFileSync(
  options.injectFile.replace(".json", "_injected.json"),
  JSON.stringify(lottieJson)
);