get-command-args.ts

import { deunionize } from 'telegraf';

import { Context } from '../interfaces';

export const getCommandArgs = (ctx: Context, command: string): string => {
  const messageText = deunionize(ctx.message).text;

  const argsFromCommandRegex = new RegExp(
    `/${command}(?:@.*_bot)? (?<args>.*)`,
  );
  const args = argsFromCommandRegex.exec(messageText);
  return args.groups.args.trim();
};