download-prismic-images.js

const { exec } = require("child_process");
const inputChunks = [];

process.stdin.resume();
process.stdin.setEncoding("utf8");
process.stdin.on("data", (chunk) => inputChunks.push(chunk));
process.stdin.on("end", function () {
  const inputJSON = inputChunks.join("");
  const prismicData = JSON.parse(inputJSON);
  const curlCommand = getCurlToDownloadAllImages(prismicData);

  exec(curlCommand);
});

function getCurlToDownloadAllImages(data) {
  const { results: entries } = data;
  const allImageUrls = [];

  for (const entry of entries) {
    const {
      data: {
        image: { url },
      },
    } = entry;

    if (!url) {
      continue;
    }

    allImageUrls.push(url.slice(0, url.indexOf("?auto=compress,format")));
  }

  return `curl ${[...new Set(allImageUrls)]
    .map((url) => ` -O ${url}`)
    .join("")}`;
}