#!/bin/bash
{# nocheck: shell-template  grandfathered, values only: bot token, chat id and the curl filter's timeout #}
set -u

# Make the instance text human readable again (reverse systemd escaping)
friendly="$(systemd-escape --unescape "$1")"

if command -v hostname &>/dev/null; then
  host=$(hostname)
else
  host="$HOSTNAME"
fi

{{ 30 | curl }} -X POST \
  "https://api.telegram.org/bot{{ TELEGRAM_BOT_TOKEN }}/sendMessage" \
  -d chat_id="{{ TELEGRAM_CHAT_ID }}" \
  --data-urlencode text="service ${friendly//\//-} on ${host} failed"