Telegram bot for https://t.me/tiling_wm_mastery

bot.sh

#!/bin/bash
[[ -z $TOKEN ]] && { echo "No bot token provided" >&2; exit 1; }
URL="https://api.telegram.org/bot$TOKEN"
while :; do
	res=$(curl -s "$URL/getUpdates" -F offset="${last_upd_id:-0}")
	last_upd_id=$(jq -r '.result[-1].update_id + 1' <<<"$res")
	while read -r msg; do
		mention=$(jq -r \
			'.new_chat_members[0]
			| if .username then "@\(.username)"
			else "<a href=\"tg://user?id=\(.id)\">\(.first_name)</a>"
			end' <<<"$msg")
		text="Привет, $mention, какой <code>WM</code> используешь?"
		curl -s "${URL}/sendMessage" \
			-F chat_id="$(jq -r '.chat.id' <<<"$msg")" \
			-F text="$text" \
			-F parse_mode="HTML" \
			-F reply_to_message_id="$(jq -r '.message_id' <<<"$msg")"
	done < <(jq -c \
		'.result[].message | select(has("new_chat_members"))' <<<"$res")
done