Download the whole photos in a Facebook post

script.js

// var fbPhotosPhotoActionsItem

function getHttp(url, cb) {
  let http = new XMLHttpRequest();
  http.open("GET", url, true);

  http.onreadystatechange = function () {
    if (http.readyState === 4)
      cb(null, http.responseURL);
  }
  http.send();
}

function remove() {
  document.getElementById('results').remove();
}

function download(urls) {
  console.log(urls);
  console.log(arguments);
  for (let link of urls) {
    window.open(link, '_blank');
    // console.log(link)
  }
}

function getUrls(arr, res) {

  let links = arr || [];
  let results = res || [];
  let working = false;
  document.querySelector(".fbPhotoSnowliftDropdownButton._p.uiButton").click();

  let interval;
  interval = setInterval(() => {
    if (working) {
      console.log("working !");
      return;
    }

    let loaded = document.querySelector(".uiContextualLayerPositioner:not(.hidden_elem)");
    let a = loaded && loaded.querySelector("[data-action-type='download_photo'] a");

    if (a) {
      working = true;

      console.log("a: ", a);

      let link = a.href;

      let index = links.indexOf(link);

      console.log("index: %o", index);

      if (index === -1) {
        links.push(link);
        let goNextButton = document.querySelector(".snowliftPager.next");
        console.log("goNextButton: %o", goNextButton);
        // goNextButton.click();
        goNextButton.click();
        getHttp(link, (err, finalLink) => {
          results.push(finalLink);
          getUrls(links, results);
        });
      } else {
        // console.log(results.join("\r\n"));

        let e = document.createElement('div');
        e.setAttribute("id", "results");
        Object.assign(e.style, {
          background: "white",
          position: "fixed",
          height: "100%",
          width: "100%",
          top: 0,
          left: 0,
          zIndex: 555,
        });

        let html = document.querySelector(".userContent").innerHTML;
        let linksHtml = '<textarea style="width: 100%; height: 300px">' + results.join("\n") + '</textarea>';
        // linksHtml.results = results;
        window.results = results;

        linksHtml += `<button onclick="download(window.results)">Download Links</button>`;
        linksHtml += `<button onclick="remove()">Close</button>`;

        e.innerHTML = html + linksHtml;

        document.body.appendChild(e);

        //document.write(html+linksHtml);

        //document.write(results.join("<br>"));

      }

      working = false;
      console.log("interval cleared");
      clearInterval(interval);

    } else {
      console.log("can't find");
    }
  }, 300);

}

function start() {
  let container = document.querySelector("._2a2q");
  let children = container.children[0].click();

  let interval;
  interval = setInterval(() => {
    if (document.querySelector(".fbPhotoSnowliftDropdownButton._p.uiButton")) {
      clearInterval(interval);
      getUrls();
    }
  }, 300);

}


start();