############################################
#  Function: TimeDiff
############################################
# param1 is the 'from' DateTime as 'YYYY-MM-DD HH:MM:SS' 24-hour clock
# param2 is the 'to' Date as 'YYYY-MM-DD HH:MM:SS' 24 hour-clock
# returns time difference in seconds
sub timeDiff {
    
    my (@fromDT, @toDT);
    my (@fromT, @toT);
    my ($fromTM, $toTM);
    
    if(!defined($_[0]) || !defined($_[1])){
        return(1);
    }
    
    @fromDT = split(/ /,$_[0]);
    @toDT = split(/ /,$_[1]);
    
    @fromT = split(/:/,$fromDT[1]);
    @toT = split(/:/,$toDT[1]);
    
    $fromTM = ($fromT[0] * 3600) + ($fromT[1] * 60) + $fromT[2];
    $toTM = ($toT[0] * 3600) + ($toT[1] * 60) + $toT[2];
    
    # If fromDT is different than toDT we make the assumption that either the data is corrupt or the transaction ran over midnight
    if($fromDT[0] ne $toDT[0]){
        my @fromDate = split(/-/,$fromDT[0]);
        my @toDate = split(/-/,$toDT[0]);
        if( ($fromDate[0] eq $toDate[0]) && ($fromDate[1] eq $toDate[1]) && ( ($toDate[2] - $fromDate[2]) == 1) ) {
            $toTM += (24 * 3600);
        } else {
            return;
        }
    }
    
    if(($toTM - $fromTM) == 0){
        return(1);
    }
    
    return($toTM - $fromTM);
}