gistfile1.js

r.table('users').changes()
	.filter(r.row('new_val')('profile').ne(r.row('old_val')('profile')))
	.then(function (cursor) {
		cursor.each(async function (err, row) {
		if (err) new Error(err);

		сonsole.log('Feed change detected!');

		await setLocale({from: {id: row.old_val.id}})
		if (row.old_val && row.new_val && row.old_val.profile && row.new_val.profile) {
			const oldStats = row.old_val.profile.stats.competitive.overall_stats;
			const newStats = row.new_val.profile.stats.competitive.overall_stats;

			oldStats.level = oldStats.level + oldStats.prestige * 100;
			newStats.level = newStats.level + newStats.prestige * 100;

			const diffStats = {
				comprank: newStats.comprank - oldStats.comprank,
				games: newStats.games - oldStats.games,
				level: newStats.level - oldStats.level,
				losses: newStats.losses - oldStats.losses,
				ties: newStats.ties - oldStats.ties,
				wins: newStats.wins - oldStats.wins,
			};

			function addInfo(name, oldInfo, newInfo, diffInfo) {
				let text = `${name}\n<code>${oldInfo} | ${newInfo} |`;
				if (diffInfo > 0)
					text += ` +${diffInfo} 📈\n</code>`;
				else if (diffInfo === 0)
					text += ` ${diffInfo} —\n</code>`;
				else
					text += ` ${diffInfo} 📉\n</code>`;
				return text;
			}

			let text = translate("report_header");

			text += addInfo(translate("report_rating"), oldStats.comprank, newStats.comprank, diffStats.comprank);
			text += addInfo(translate("report_wins"), oldStats.wins, newStats.wins, diffStats.wins);
			text += addInfo(translate("report_losses"), oldStats.losses, newStats.losses, diffStats.losses);
			text += addInfo(translate("report_ties"), oldStats.ties, newStats.ties, diffStats.ties);
			text += addInfo(translate("report_level"), oldStats.level, newStats.level, diffStats.level);

			bot.sendMessage(row.old_val.id, text, {parse_mode: 'HTML'});
		}
	});
});