apcupsd Alert Integration

#!/bin/sh
# apcupsd event hook: forward a UPS event to a Flashduty Standard Alert Event integration.
# Usage: flashduty-notify.sh <event> <ups-name>
URL='https://api.flashcat.cloud/event/push/alert/standard?integration_key=YOUR_INTEGRATION_KEY'

EVENT="$1"
UPS="${2:-unknown}"

case "$EVENT" in
  onbattery)  KEY=power;   STATUS=Warning;  TEXT="on battery" ;;
  failing|timeout|loadlimit|runlimit)
              KEY=power;   STATUS=Critical; TEXT="battery limit reached ($EVENT)" ;;
  offbattery|mainsback)
              KEY=power;   STATUS=Ok;       TEXT="utility power restored" ;;
  commfailure) KEY=comm;   STATUS=Critical; TEXT="communication lost" ;;
  commok)     KEY=comm;    STATUS=Ok;       TEXT="communication restored" ;;
  changeme|emergency)
              KEY=battery; STATUS=Critical; TEXT="battery failure ($EVENT)" ;;
  battdetach) KEY=battconn; STATUS=Warning; TEXT="battery disconnected" ;;
  battattach) KEY=battconn; STATUS=Ok;      TEXT="battery reconnected" ;;
  *) exit 0 ;;
esac

esc() { printf '%s' "$1" | tr '\n\r\t' '   ' | sed 's/\\/\\\\/g; s/"/\\"/g'; }

JSON=$(printf '{"title_rule":"UPS %s: %s","event_status":"%s","alert_key":"apcupsd:%s:%s","description":"apcupsd event %s on UPS %s","labels":{"resource":"%s","check":"%s","apcupsd_event":"%s"}}' \
  "$(esc "$UPS")" "$TEXT" "$STATUS" "$(esc "$UPS")" "$KEY" "$(esc "$EVENT")" "$(esc "$UPS")" "$(esc "$UPS")" "$KEY" "$(esc "$EVENT")")

curl -fsS -m 10 -X POST -H 'Content-Type: application/json' -d "$JSON" "$URL" >/dev/null
exit 0

for e in onbattery offbattery mainsback failing timeout loadlimit runlimit commfailure commok changeme emergency battdetach battattach; do
  f="/etc/apcupsd/$e"
  if [ -e "$f" ]; then
    echo "$f already exists: add the line  /etc/apcupsd/flashduty-notify.sh $e \"\$1\"  near its top"
  else
    printf '#!/bin/sh\n/etc/apcupsd/flashduty-notify.sh %s "$1"\nexit 0\n' "$e" > "$f"
    chmod +x "$f"
  fi
done

/etc/apcupsd/onbattery myups
/etc/apcupsd/offbattery myups