console.log("contentscript.js started!");

function extractUrlsAndFilenames() {
  console.log("contentscript.js: this is extractFileUrlsAndNames()");
  // get the correct frame
  let frame = document.querySelector("iframe.js-mail-content");
  
  // get all divs containing attachments
  let divs = frame.contentWindow.document.body.querySelectorAll("div.samoware-mail-message__attach__item[attachment-ref]"); 

  // loop over divs and extract attachment information
  let urlsAndFilenames = []
  divs.forEach(div => {
    let url = div.getAttribute("attachment-ref");
    let filename = div.getAttribute("file-name");

    // if filename is null, derive it from url 
    if ( ! filename ) {
      let splitUrl = url.split("/");
      filename = splitUrl[splitUrl.length-1];
    }
    urlsAndFilenames.push({url: url, filename: filename});
  })
  return urlsAndFilenames;
}

const urlsAndFilenames = extractUrlsAndFilenames();
console.log(`contentscript.js: done; found ${JSON.stringify(urlsAndFilenames)}`);
urlsAndFilenames;