Function _correctMarkersInPad

src/node/handler/PadMessageHandler.ts:1076–1114

(atext: AText, apool: AttributePool)

 * Copied from the Etherpad Source Code. Don't know what this method does excatly...
 */
const _correctMarkersInPad = (atext: AText, apool: AttributePool) => {
  const text = atext.text;

  // collect char positions of line markers (e.g. bullets) in new atext
  // that aren't at the start of a line
  const badMarkers = [];
  let offset = 0;
  for (const op of deserializeOps(atext.attribs)) {
    const attribs = AttributeMap.fromString(op.attribs, apool);
    const hasMarker = AttributeManager.lineAttributes.some((a: string) => attribs.has(a));
    if (hasMarker) {
      for (let i = 0; i < op.chars; i++) {
        if (offset > 0 && text.charAt(offset - 1) !== '\n') {
          badMarkers.push(offset);
        }
        offset++;
      }
    } else {
      offset += op.chars;
    }
  }

  if (badMarkers.length === 0) {
    return null;
  }

  // create changeset that removes these bad markers
  offset = 0;

  const builder = new Builder(text.length);

  badMarkers.forEach((pos) => {
    builder.keepText(text.substring(offset, pos));
    builder.remove(1);
    offset = pos + 1;
  });

  return builder.toString();
};

/**
 * Handles a CLIENT_READY. A CLIENT_READY is the first message from the client