/**
 * Modifies variables names of tagged template literals (`"_templateObject"`)
 * from a given string so that they're all unique.
 *
 * This is needed to workaround a potential naming collision when individually
 * transpiled scripts are bundled. See #950.
 */
function replaceTemplateObjectNames(js: string): string {
  // Breakdown of regular expression to match "_templateObject" variables
  //
  // Pattern                | Meaning
  // -------------------------------------------------------------------
  // (                      | Group1
  // _templateObject        | Match "_templateObject"
  // \d*                    | Match 0 or more digits
  // \b                     | Match word boundary
  // )                      | End Group1
  const searchValueRegex = /(_templateObject\d*\b)/g;

  // The replacement pattern appends an underscore and UUID to the matches:
  //
  // Pattern                | Meaning
  // -------------------------------------------------------------------
  // $1                     | Insert matching Group1 (from above)
  // _                      | Insert "_"
  // ${uniqueId}            | Insert previously generated UUID
  const uniqueId = uuid().replace(/-/g, '');
  const replaceValue = `$1_${uniqueId}`;

  // Example output:
  // _templateObject  -> _templateObject_200817b1154811e887be8b38cea68555
  // _templateObject2 -> _templateObject2_5e44de8015d111e89b203116b5c54903

  return js.replace(searchValueRegex, replaceValue);
}

export function create(req: express.Request, res: express.Response) {
  const image: IImage = {
    id: uuid(),
    image: req.body.image
  };

  redisClient.set(image.id, image.image, function (err: any, reply: any) {
    if (err) {
      return errorHandler.handleError(res, err);
    }

    res.json({ id: image.id });
  });
}