ConvertX/src/converters/libjxl.ts

import { execFile as execFileOriginal } from "node:child_process";
import { ExecFileFn } from "./types";

// declare possible conversions
export const properties = {
  from: {
    jxl: ["jxl"],
    images: ["apng", "exr", "gif", "jpeg", "pam", "pfm", "pgm", "pgx", "png", "ppm"],
  },
  to: {
    jxl: ["apng", "exr", "gif", "jpeg", "pam", "pfm", "pgm", "pgx", "png", "ppm"],
    images: ["jxl"],
  },
};

export function convert(
  filePath: string,
  fileType: string,
  convertTo: string,
  targetPath: string,
  options?: unknown,
  execFile: ExecFileFn = execFileOriginal, // to make it mockable
): Promise<string> {
  let tool = "";
  if (fileType === "jxl") {
    tool = "djxl";
  }

  if (convertTo === "jxl") {
    tool = "cjxl";
  }

  return new Promise((resolve, reject) => {
    execFile(tool, [filePath, targetPath], (error, stdout, stderr) => {
      if (error) {
        reject(`error: ${error}`);
      }

      if (stdout) {
        console.log(`stdout: ${stdout}`);
      }

      if (stderr) {
        console.error(`stderr: ${stderr}`);
      }

      resolve("Done");
    });
  });
}