Schoology course enrollment lookup script

Schoology Lookup.js

// Get your API credentials at https://app.schoology.com/api and insert them below.
// Go to https://api.schoology.com/404 to avoid CORS problems.
// Paste the script in console, wait for "Ready," then call the function searchSection(sectionId).
const CONSUMER_KEY = ">>>YOUR_API_KEY<<<";
const CONSUMER_SECRET = ">>>YOUR_API_SECRET<<<";

var users = [], userCourses = [], matches = [];
async function fetchUsers() {
  users = [];
  let numUsers = 1000;
  for (let i = 0; i < numUsers; i += 200) {
    let reqUrl = `https://api.schoology.com/v1/users?start=${i}&limit=200`;
    let nonce = Math.floor(Math.random()*1000000000);
    let timestamp = Math.floor(new Date().getTime()/1000);
    let response = await fetch(reqUrl, {
      "method": "GET",
      "headers": {
        "authorization": 'OAuth oauth_consumer_key="'+CONSUMER_KEY+'", oauth_nonce="'+ nonce + '", oauth_signature="' + oauthSignature.generate("GET", reqUrl, {
          oauth_consumer_key: CONSUMER_KEY,
          oauth_nonce: nonce,
          oauth_timestamp: timestamp,
          oauth_signature_method: "HMAC-SHA1",
          oauth_version: "1.0",
          start: i,
          limit: 200,
        }, CONSUMER_SECRET) + '", oauth_signature_method="HMAC-SHA1", oauth_timestamp="' + timestamp + '", oauth_version="1.0"'
      }
    });
    if (!response.ok) return console.error(await response.text());
    const data = await response.json();
    numUsers = data.total;
    users = users.concat(data.user);
  }
  console.log("Ready.");
}
async function searchSection(id, requestInterval=105, minCacheRatio=0.99) {
  matches = [];
  if (userCourses.length/users.length < minCacheRatio) {
    let errors = [], completed = 0;
    userCourses = [];
    users.forEach(async (user, index) => {
      setTimeout(async () => {
        let reqUrl = `https://api.schoology.com/v1/users/${user.id}/sections?include_past=1`;
        let nonce = Math.floor(Math.random()*1000000000);
        let timestamp = Math.floor(new Date().getTime()/1000);
        let response = await fetch(reqUrl, {
          "method": "GET",
          "headers": {
            "authorization": 'OAuth oauth_consumer_key="'+CONSUMER_KEY+'", oauth_nonce="'+ nonce + '", oauth_signature="' + oauthSignature.generate("GET", reqUrl, {
              oauth_consumer_key: CONSUMER_KEY,
              oauth_nonce: nonce,
              oauth_timestamp: timestamp,
              oauth_signature_method: "HMAC-SHA1",
              oauth_version: "1.0",
              include_past: 1,
            }, CONSUMER_SECRET) + '", oauth_signature_method="HMAC-SHA1", oauth_timestamp="' + timestamp + '", oauth_version="1.0"'
          }
        });
        if (!response.ok) return errors.push({error: await response.text(), status: response.status, user, index});
        const sections = await response.json();
        userCourses.push({user, sections: sections.section});
        for (const section of sections.section)
          if (section.id == id)
            matches.push({
              id: user.id,
              name: user.name_display || user.name_first+" "+user.name_last,
              user});
        completed++;
        console.clear();
        console.log(completed+"/"+users.length);
        console.log(errors.length+" failed.");
        if (completed == users.length-errors.length) {
          if (errors.length != 0) console.error(errors);
          console.log("Done.");
          console.log(matches);
        }
      }, index*requestInterval);
    });
  } else {
    for (const item of userCourses)
      for (const section of item.sections)
        if (section.id == id)
          matches.push({
            id: item.user.id,
            name: item.user.name_display || item.user.name_first+" "+item.user.name_last,
            user: item.user});
    console.log("Done.");
    console.log(matches);
  }
}

var script = document.createElement("script");
script.onload = () => fetchUsers();
script.src = "https://cdn.jsdelivr.net/npm/oauth-signature/dist/oauth-signature.min.js";
document.head.appendChild(script);
console.log("Loading...");