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example/lava_lamp.pl  view on Meta::CPAN

        # time window    
        $lamp->off();
        update_status($status,0,$mode);
    } elsif (!$is_on && $in_period && has_trigger($status)) {
        $lamp->on();
        update_status($status,1,"notif",undef,trigger_label($status));
        delete_trigger($status);
    }
} elsif ($mode eq "notif") {
    my $type = $opts{type} || die "No notification type given";
    if (lc($type) =~ /^(problem|custom)$/ && !$is_on) {
        if (check_on_period()) {
            # If it is a problem and the lamp is not on, switch it on, 
            # but only if the lamp is not 'hot' (i.e. was not switch off only 
            # $LAMP_REST_TIME
            my $last_hist = get_last_entry($status);
            my $rest_time = time - $LAMP_REST_TIME;
            if (!$last_hist || $last_hist->[0] < $rest_time) {
                $lamp->on();
                update_status($status,1,$mode,time,$opts{label});
            } else {
                info("Lamp not switched on because the lamp was switched off just before ",
                     time - $last_hist->[0]," seconds");
            }
        } else {
            # Notification received offtime, remember to switch on the lamp
            # when in time
            info("Notification received in an off-period: type = ",$type," | ",$opts{label});
            set_trigger($status,$opts{label});
        }
    } elsif (lc($type) eq 'recovery') {
        if ($is_on) {
            # If it is a recovery switch it off
            $lamp->off();
            update_status($status,0,$mode,time,$opts{label});
        } else {
            # It's already off, but remove any trigger marker
            delete_trigger($status);
        }
    } else {
        info("Notification: No state change. Type = ",$type,", State = ",$is_on ? "On" : "Off",
            " | Check Period: ",check_on_period());
    }
} else {
    die "Unknow mode '",$mode,"'";
}

if ($DEBUG) {
    info(Dumper($status));
}

# Logout, we are done
close_lamp($lamp);

store_status($status);

# ================================================================================================

sub info {
    if (open (F,">>$LOG_FILE")) {
        print F scalar(localtime),": ",join("",@_),"\n";
        close F;
    }
}

# List the status file
sub list {
    my $status = retrieve $STATUS_FILE;
    my $hist_entries = $status->{hist};
    for my $hist (@{$hist_entries}) {
        print scalar(localtime($hist->[0])),": ",$hist->[1] ? "On " : "Off"," -- ",$hist->[2]," : ",$hist->[3],"\n";
    }
    print "Content: ",Dumper($status) if $DEBUG;
    return 1;
} 

# Create empty status file if necessary
sub init_status {
    my $status = {};
    $status->{hist} = [];
    if (! -e $STATUS_FILE) {
        store $status,$STATUS_FILE;
    }
}

sub log_manual_switch {
    my $status = shift;
    my $is_on = shift;
    my $last = get_last_entry($status);
    if ($last && $is_on != $last->[1]) {
        # Change has been manualy in between the interval. Add an approx history entry
        update_status($status,$is_on,"manual",estimate_manual_time($status));
    }   
}

sub update_status {
    my $status = shift;
    my $is_on = shift;
    my $mode = shift;
    my $time = shift || time;
    my $label = shift;
    my $hist = $status->{hist};
    push @{$hist},[ $time, $is_on, $mode, $label];
    info($is_on ? "On " : "Off"," -- ",$mode, $label ? ": " . $label : "");
}

sub estimate_manual_time {
    my $status = shift;
    my $last_hist = get_last_entry($status);
    if ($last_hist) {
        my $now = time;
        my $last = $last_hist->[0];
        my $calc = $now - $MANUAL_DELTA;
        return $calc > $last ? $calc : $now - int(($now - $last) / 2);
    } else {
        return time - $MANUAL_DELTA;
    }
}

sub get_last_entry {
    my $status = shift;
    if ($status) {
        my $hist = $status->{hist};
        return  $hist && @$hist ? $hist->[$#{$hist}] : undef;
    }
    return undef;
}

sub check_on_period {
    my ($min,$hour,$wd) = (localtime)[1,2,6];
    my $day = qw(Sun Mon Tue Wed Thu Fri Sat)[$wd];
    my $periods = $LAMP_ON_TIME_TABLE->{$day};
    for my $period (@$periods) {