#!/bin/bash
IFS=';' read updates security_updates < <(/usr/lib/update-notifier/apt-check 2>&1)
HOSTNAME=`hostname`

if [ ! -f ".update-check-status" ] ; then
    echo "0:0" > .update-check-status
fi

CONTROL="$updates:$security_updates"
HASCHANGED=false
ACTUALSTATE=`cat .update-check-status`

if [ "$ACTUALSTATE" != "$CONTROL" ]; then
    HASCHANGED=true
    echo $CONTROL > .update-check-status
fi

function send_message {
/usr/bin/telegram-send "[ACTION REQUIRED ON $HOSTNAME]

$1"
}

if [ $updates -gt 0 ] || [ $security_updates -gt 0 ] ; then
    if $HASCHANGED; then
        send_message "There are *$updates* updates available for *$HOSTNAME* and *$security_updates* of them are security updates"
    fi
fi

if [ -f /var/run/reboot-required ]; then
    send_message "Reboot needed on *$HOSTNAME*"
fi