Get IMathAS popup videos: Script to quickly scrape all the video helps for an IMathAS assignment. Copy the JSON response from startassess.php and assign it to the data variable. Works for sites like Lumen OHM, etc.

scrape-videos.js

var data = {};


function normalizeUrl(/*string*/ mathIasPopupUrl) {
  const url = new URL(mathIasPopupUrl);
  // console.log(url.search);
  const searchParams = new URLSearchParams(url.search);
  // console.log(searchParams.get("url"));
  return searchParams.get("url");
}

function dynamicallyLoadScript(url) {
    var script = document.createElement("script");  // create a script DOM node
    script.src = url;  // set its src to the provided URL

    document.head.appendChild(script);  // add it to the end of the head section of the page (could change 'head' to 'body' to add it to the end of the body section instead)
}

dynamicallyLoadScript("https://cdn.jsdelivr.net/npm/url-polyfill@1.1.8/url-polyfill.min.js");


// lag enough to load the polyfill
setTimeout(function() {
  let output = "\n"; // String to print
  for (let q = 0; q < data.JSON.questions.length; q++) {
    output += `Problem ${q+1}\n`;
    let probVidCt = 0;
    for (let i = 0; i < data.JSON.questions[q].jsparams.helps.length; i++) {
      if (data.JSON.questions[q].jsparams.helps[i].label == "video") {
          // console.log(data.JSON.questions[q].jsparams.helps[i].url); // DEBUG
          output += normalizeUrl(data.JSON.questions[q].jsparams.helps[i].url);
          output += "\n\n";
          probVidCt++;
      }
    }
    if (probVidCt == 0) {
      output += `No help videos found for problem ${q+1}.\n\n`;
    }
  }
  console.log(output);
}, 2000);