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

function getCurrentDate() {
  let today = new Date();
  let yyyy = today.getFullYear();
  let mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
  let dd = String(today.getDate()).padStart(2, '0');
  return yyyy + "-" + mm + "-" + dd;
}

function extractFileUrlsAndNames() {
  return [];
}

function onStartedDownload(id) {
  console.log(`Started downloading: ${id}`);
}

function onFailedToStartDownload(error) {
  console.log(`Download failed: ${error}`);
}


let currentDate = getCurrentDate();
console.log(`contentscript.js: currentDate is ${currentDate}`);

let files = extractFileUrlsAndNames();
console.log(`contentscript.js: files is ${files}`);

for (let i = 0; i < files.length; i++) {
  // prefix files[i].filename with currentDate
  let prefixedFilename = currentDate + " " + files[i].filename;

  let downloading = browser.downloads.download({
    url: files[i].url,
    filename: prefixedFilename,
    saveAs: (i == 0)   // raise a path chooser dialog for the first file only; all later files will (hopefully!) be saved to the same folder
  });
  downloading.then(onStartedDownload, onFailedToStartDownload);
}

"contentscript.js has finished";