#!/bin/bash
 
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
  
base_path=$1
hours=$2
as_user=$3

if [ -z "$as_user" ]; then
  last_date=$(find $base_path -mindepth 1 -maxdepth 1 -printf "%T@\n" 2>/dev/null | sort | tail -n 1)
else
  last_date=$(sudo -u "$as_user" find $base_path -mindepth 1 -maxdepth 1 -printf "%T@\n" 2>/dev/null | sort | tail -n 1)
fi

if [ -z "$last_date" ]; then
  echo "UNKNOWN: Could not read folder"
  exit $STATE_UNKNOWN
else
  LC_ALL=C last_date=$(printf "%.*f" 0 $last_date)
  min_date=$(date -d "$hours hours ago" "+%s")
  if [ "$min_date" -lt "$last_date" ]; then
    echo "OK: Last backup $(date -d @$last_date)"
    exit $STATE_OK
  else
    echo "CRITICAL: Last backup $(date -d @$last_date)"
    exit $STATE_CRITICAL
  fi
fi