my $msg = "Status has changed" 
    if $bbstatus ne $last_bbstatus; 
$msg = "Last send too old" 
    if ! length $msg and ($now - $last_send_time) > $min_frequency;
$msg = "Forced send requested" 
    if ! length $msg and defined($OPTS::opts{f});

$send_flag = length $msg;
$msg ||= "No changes";