#!/bin/bash

# (c) Michael Honkoop <mhonkoop@comsolve.nl>

# License: GNU General Public License v2

# Version 0.1 (initial release)
#
# Version 0.2
# Updated output to have updateable compontents comma-sepoarated.

# Installation:
# This file should be placed on a/the DirectAdmin host in /usr/lib/check_mk_agent/local
# 
# (optional) if you want the check to run on a different schedule (like once per hour) put it in a subdirectory of above path
# named to the number of seconds of the interval wanted, so 3600/ for once an hour, 86400 for once per day.
# Suggestion for this check is to run this once a day to minimize processing cost.
#
# Also do not forget to make this file executable with chmod +x /usr/lib/check_mk_agent/local/direactadmin.sh


##########################################################################
# Global definitions for the script - change if needed to fit your needs #
##########################################################################

# Custombuild switch , set to 1 if you are using it.
CustomBuild=1

#####################################################################
# DO NOT CHANGE BELOW UNLESS YOU EXACTLY KNOW WHAT YOU ARE DOING    #
#####################################################################

# Define global path of directAdmin
if [ $CustomBuild -eq 1 ]
then
    DirAdmin_Path="/usr/local/directadmin/custombuild"
else
    DirAdmin_Path="/usr/local/directadmin"
fi

# Check DirectAdmin Core updates
DirectAdmin_Core_Update=$($DirAdmin_Path/build update)
if [[ $DirectAdmin_Core_Update == *"is already latest" ]]
then
    echo "0 \"DirectAdmin_Core\" - DirectAdmin core all up to date"
else
    echo "1 \"DirectAdmin_Core\" - DirectAdmin core has a newer version available - consider updating"
fi

# Check DirectAdmin Core updates
DirectAdmin_Core_Update=$($DirAdmin_Path/build update)
if [[ $DirectAdmin_Core_Update == *"is already latest" ]]
then
    echo "0 \"DirectAdmin_Core\" - DirectAdmin core all up to date"
else
    echo "1 \"DirectAdmin_Core\" - DirectAdmin core has a newer version available - consider updating"
fi

# store version information from DirectAdmin packages
DirectAdmin_Versions_Update=$($DirAdmin_Path/build versions)
#Define updates Array
updates=()
# iterate over the collected data to find possible updates
while read -r line; do
    if [[ $line =~ ^Latest\ version\ of\ (.+):\ (.+)$ ]]; then
        component="${BASH_REMATCH[1]}"
        latest="${BASH_REMATCH[2]}"
    elif [[ $line =~ ^Installed\ version\ of\ (.+):\ (.+)$ ]]; then
        installed="${BASH_REMATCH[2]}"

        # Compare versions using sort -V
        if [[ "$(printf '%s\n%s\n' "$installed" "$latest" | sort -V | head -n1)" != "$latest" ]]; then
            updates+=("$component")
        fi
    fi
done <<< "$DirectAdmin_Versions_Update"

if [[ ${#updates[@]} -eq 0 ]]; then
    echo "0 \"DirectAdmin\" - All DirectAdmin Versions are up to date"
else
    update_list=$(IFS=,; echo "${updates[*]}")
    echo "1 \"DirectAdmin\" - DirectAdmin Versions ${update_list} have updates"
fi