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dpavlin |
1.1 |
package Time::Available; |
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dpavlin |
1.3 |
use 5.001; |
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dpavlin |
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use strict; |
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use warnings; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our %EXPORT_TAGS = ( |
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'days' => [ qw( |
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DAY_MONDAY |
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DAY_TUESDAY |
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DAY_WEDNESDAY |
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DAY_THURSDAY |
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DAY_FRIDAY |
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DAY_SATURDAY |
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DAY_SUNDAY |
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DAY_WEEKDAY |
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DAY_WEEKEND |
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DAY_EVERYDAY |
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dpavlin |
1.2 |
) ], |
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'fmt_interval' => [ qw(fmt_interval) ] |
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); |
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our @EXPORT_OK = ( |
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@{ $EXPORT_TAGS{'days'} }, |
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@{ $EXPORT_TAGS{'fmt_interval'} } |
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); |
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dpavlin |
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our @EXPORT; # don't export anything by default! |
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our $VERSION = '0.01'; |
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# define some constants used later |
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use constant DAY_MONDAY => 0x01; |
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use constant DAY_TUESDAY => 0x02; |
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use constant DAY_WEDNESDAY => 0x04; |
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use constant DAY_THURSDAY => 0x08; |
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use constant DAY_FRIDAY => 0x10; |
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use constant DAY_SATURDAY => 0x20; |
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use constant DAY_SUNDAY => 0x40; |
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use constant DAY_WEEKDAY => 0x1F; |
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use constant DAY_WEEKEND => 0x60; |
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use constant DAY_EVERYDAY => 0x7F; |
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use constant SEC_PER_DAY => 86400; |
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my $debug = 0; |
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# |
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# make new instance |
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# |
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sub new { |
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my $class = shift; |
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my $self = {}; |
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bless($self, $class); |
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$self->{ARGS} = {@_}; |
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$debug = $self->{ARGS}->{DEBUG}; |
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die("need start time") if (! $self->{ARGS}->{start}); |
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# calc start and stop seconds |
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my ($hh,$mm,$ss) = split(/:/,$self->{ARGS}->{start},3); |
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dpavlin |
1.5 |
print STDERR "new: start time ",$hh||0,":",$mm||0,":",$ss||0,"\n" if ($debug); |
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dpavlin |
1.1 |
my $s = $hh * 3600 || die("need at least hour specified for start time"); |
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$s += $mm * 60 if ($mm); |
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$s += $ss if ($ss); |
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$self->{start} = $s; |
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die("need end time") if (! $self->{ARGS}->{end}); |
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($hh,$mm,$ss) = split(/:/,$self->{ARGS}->{end},3); |
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print STDERR "new: end time ",$hh||0,":",$mm||0,":",$ss||0,"\n" if ($debug); |
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1.1 |
$s = $hh * 3600 || die("need at least hour specified for end time"); |
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$s += $mm * 60 if ($mm); |
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$self->{end} = $s; |
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die("need dayMask specified") if (! $self->{ARGS}->{dayMask}); |
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$self->{dayMask} = $self->{ARGS}->{dayMask}; |
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$self ? return $self : return undef; |
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} |
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# |
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# this sub (originally from Time::Avail) will return if day is applicable |
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# |
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dpavlin |
1.3 |
sub _dayOk($) { |
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my $self = shift; |
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my $day = shift || return; |
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dpavlin |
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dpavlin |
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my $dayMask = $self->{dayMask}; |
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1.1 |
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my $dayOk = 0; |
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if( ( $day == 0 ) && ( $dayMask & DAY_SUNDAY ) ) { |
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$dayOk = 1; |
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} elsif( ( $day == 1) && ( $dayMask & DAY_MONDAY ) ) { |
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$dayOk = 1; |
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} elsif( ($day == 2) && ( $dayMask & DAY_TUESDAY ) ) { |
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$dayOk = 1; |
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} elsif( ($day == 3) && ( $dayMask & DAY_WEDNESDAY ) ) { |
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$dayOk = 1; |
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} elsif( ( $day == 4) && ( $dayMask & DAY_THURSDAY ) ) { |
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$dayOk = 1; |
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} elsif( ( $day == 5 ) && ( $dayMask & DAY_FRIDAY ) ) { |
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$dayOk = 1; |
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} elsif( ( $day == 6 ) && ( $dayMask & DAY_SATURDAY ) ) { |
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$dayOk = 1; |
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} |
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print STDERR "day: $day dayMask: ",unpack("B32", pack("N", $dayMask))," ok: $dayOk\n" if ($debug); |
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return $dayOk; |
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} |
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# |
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# this will return number of seconds that service is available if passed |
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# uptime of service |
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# |
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sub uptime { |
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my $self = shift; |
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dpavlin |
1.5 |
my $time = shift || die "need uptime timestamp to calculate uptime"; |
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dpavlin |
1.1 |
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dpavlin |
1.3 |
# calculate offset -- that is number of seconds since midnight |
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my @lt = localtime($time); |
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my $offset = $lt[2]; # hour |
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$offset *= 60; # convert to minutes |
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$offset += $lt[1]; # minutes |
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$offset *= 60; # convert to seconds |
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$offset += $lt[0]; |
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# check if day falls into dayMask |
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return 0 if (! $self->_dayOk($lt[6]) ); |
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dpavlin |
1.1 |
my $s=0; |
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my $start = $self->{start}; |
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my $end = $self->{end}; |
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dpavlin |
1.3 |
print STDERR "start: $start end: $end time: $offset\n" if ($debug); |
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dpavlin |
1.1 |
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dpavlin |
1.3 |
if ( $end > $start ) { |
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if ($offset < $start) { |
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dpavlin |
1.1 |
$s = $end - $start; |
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dpavlin |
1.3 |
} elsif ($offset < $end) { |
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$s = $end - $offset; |
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dpavlin |
1.1 |
} |
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dpavlin |
1.3 |
} elsif ( $start > $end ) { # over midnight |
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if ( $offset < $end ) { |
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if ( $offset < $start) { |
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$s = SEC_PER_DAY - $start + $end - $offset; |
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dpavlin |
1.1 |
} else { |
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$s = SEC_PER_DAY - $start + $end; |
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} |
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} else { |
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dpavlin |
1.3 |
if ( $offset < $start ) { |
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dpavlin |
1.1 |
$s = SEC_PER_DAY - $start; |
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} else { |
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dpavlin |
1.3 |
$s = SEC_PER_DAY - $offset; |
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dpavlin |
1.1 |
} |
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} |
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} |
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return $s; |
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} |
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dpavlin |
1.2 |
# |
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# this auxillary function will pretty-format interval in [days]d hh:mm:ss |
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# |
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sub fmt_interval { |
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my $s = shift || 0; |
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my $out = ""; |
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my $d = int($s/(24*60*60)); |
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$s = $s % (24*60*60); |
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my $h = int($s/(60*60)); |
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$s = $s % (60*60); |
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my $m = int($s/60); |
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$s = $s % 60; |
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$out .= $d."d " if ($d > 0); |
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dpavlin |
1.1 |
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dpavlin |
1.2 |
$out .= sprintf("%02d:%02d:%02d",$h,$m,$s); |
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return $out; |
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dpavlin |
1.5 |
} |
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# |
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# this function will calculate uptime for some interval |
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# |
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sub interval { |
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my $self = shift; |
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my $from = shift || die "need start time for interval"; |
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my $to = shift || die "need end time for interval"; |
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print STDERR "from:\t$from\t",scalar gmtime($from),"\n" if ($debug); |
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print STDERR "to:\t$to\t",scalar gmtime($to),"\n" if ($debug); |
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my $total = 0; |
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# calc first day availability |
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$total += $self->uptime($from); |
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print STDERR "total: $total\n" if ($debug); |
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# add all whole days |
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my $sec_in_day = $self->sec_in_interval; |
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my $day = 86400; # 24*60*60 |
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my $loop_start_time = int($from/$day)*$day + $day; |
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my $loop_end_time = int($to/$day)*$day - $day; |
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print STDERR "loop (start - end): $loop_start_time - $loop_end_time\n" if ($debug); |
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for (my $t = $loop_start_time; $t <= $loop_end_time; $t += $day) { |
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print STDERR "t:\t$t\t",scalar gmtime($t),"\n" if ($debug); |
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$total += $sec_in_day if ($self->day_in_interval($t)); |
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print STDERR "total: $total\n" if ($debug); |
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} |
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# add rest of last day |
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$total -= $self->utpime($to); |
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print STDERR "total: $total (final)\n" if ($debug); |
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return $total; |
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} |
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# |
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# this function will check if day falls into interval |
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# |
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sub day_in_interval { |
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my $self = shift; |
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my $time = shift || die "need timestamp to check if day is in interval"; |
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my @lt = localtime($time); |
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return $self->_dayOk($lt[6]); |
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} |
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# |
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# return seconds in defined interval |
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# |
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sub sec_in_interval { |
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my $self = shift; |
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# over midnight? |
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if ($self->{start} > $self->{end}) { |
262 |
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return(86400 - $self->{start} + $self->{end}); |
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} else { |
264 |
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return($self->{end} - $self->{start}); |
265 |
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} |
266 |
dpavlin |
1.2 |
} |
267 |
dpavlin |
1.1 |
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1; |
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__END__ |
270 |
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=head1 NAME |
272 |
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Time::Available - Perl extension to calculate time availability |
274 |
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=head1 SYNOPSIS |
276 |
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use Time::Available; |
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279 |
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# init interval and dayMask |
280 |
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my $interval = new( start=>'07:00', stop=>'17:00', |
281 |
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dayMask=> Time::Available::DAY_WEEKDAY ); |
282 |
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# alternative way to init module using exporting of days |
284 |
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use Time::Available qw(:days); |
285 |
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my $interval = new( start=>'07:00', stop=>'17:00', |
286 |
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dayMask=> DAY_WEEKDAY ); |
287 |
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288 |
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# calculate current availability in seconds |
289 |
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print $interval->uptime(localtime); |
290 |
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291 |
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# calculate availablity in seconds from interval of uptime |
292 |
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print $interval->interval($utime1,$utime2); |
293 |
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294 |
dpavlin |
1.2 |
# pretty print interval data (this will produce output '1d 11:11:11') |
295 |
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use Time::Available qw(:fmt_interval); |
296 |
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print fmt_interval(126671); |
297 |
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298 |
dpavlin |
1.1 |
=head1 DESCRIPTION |
299 |
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300 |
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Time::Available is used to calculate availability of some resource if start |
301 |
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end end time of availability is available. That availability is calculated |
302 |
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relative to some interval which is defined when new instance of module is |
303 |
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created. |
304 |
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305 |
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Start and end dates must be specified in 24-hour format. You can specify |
306 |
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just hour, hour:minute or hour:minute:seconds format. |
307 |
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308 |
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The B<dayMask> parameter is constructed by OR'ing together one or more of |
309 |
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the following dayMask constants: |
310 |
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311 |
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=over 4 |
312 |
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313 |
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=item * |
314 |
dpavlin |
1.4 |
Time::Available::DAY_MONDAY |
315 |
dpavlin |
1.1 |
|
316 |
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=item * |
317 |
dpavlin |
1.4 |
Time::Available::DAY_TUESDAY |
318 |
dpavlin |
1.1 |
|
319 |
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=item * |
320 |
dpavlin |
1.4 |
Time::Available::DAY_WEDNESDAY |
321 |
dpavlin |
1.1 |
|
322 |
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=item * |
323 |
dpavlin |
1.4 |
Time::Available::DAY_THURSDAY |
324 |
dpavlin |
1.1 |
|
325 |
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=item * |
326 |
dpavlin |
1.4 |
Time::Available::DAY_FRIDAY |
327 |
dpavlin |
1.1 |
|
328 |
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=item * |
329 |
dpavlin |
1.4 |
Time::Available::DAY_SATURDAY |
330 |
dpavlin |
1.1 |
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331 |
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=item * |
332 |
dpavlin |
1.4 |
Time::Available::DAY_SUNDAY |
333 |
dpavlin |
1.1 |
|
334 |
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=item * |
335 |
dpavlin |
1.4 |
Time::Available::DAY_WEEKDAY |
336 |
dpavlin |
1.1 |
|
337 |
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=item * |
338 |
dpavlin |
1.4 |
Time::Available::DAY_WEEKEND |
339 |
dpavlin |
1.1 |
|
340 |
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=item * |
341 |
dpavlin |
1.4 |
Time::Available::DAY_EVERYDAY |
342 |
dpavlin |
1.1 |
|
343 |
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=back |
344 |
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345 |
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FIXME |
346 |
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347 |
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=head2 EXPORT |
348 |
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349 |
dpavlin |
1.2 |
None by default. |
350 |
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351 |
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If you specify B<:days>, Time::Available will export all |
352 |
dpavlin |
1.1 |
DAY_* constraints to your enviroment (causing possible pollution of name |
353 |
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space). You have been warned. |
354 |
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355 |
dpavlin |
1.2 |
With B<:fmt_interval> it will include function B<fmt_interval> which will |
356 |
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pretty-format interval into [days]d hh:mm:ss. |
357 |
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358 |
dpavlin |
1.1 |
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359 |
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=head1 HISTORY |
360 |
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361 |
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=over 8 |
362 |
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363 |
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=item 0.01 |
364 |
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365 |
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Original version; based somewhat on Time::Avail code |
366 |
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=back |
368 |
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369 |
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=head1 BUGS |
370 |
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371 |
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=over 8 |
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373 |
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=item * |
374 |
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Use croak and not die in module for better error handling |
375 |
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376 |
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=item * |
377 |
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Allow arbitary (array?) of holidays to be included. |
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=back |
380 |
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=head1 SEE ALSO |
382 |
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383 |
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Time::Avail is CPAN module that started it all. However, it lacked |
384 |
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calculating of availability of some interval and precision in seconds, so |
385 |
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this module was born. |
386 |
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387 |
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More information about this module might be found on |
388 |
dpavlin |
1.3 |
http://www.rot13.org/~dpavlin/projects.html#cpan |
389 |
dpavlin |
1.1 |
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390 |
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=head1 AUTHOR |
391 |
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392 |
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Dobrica Pavlinusic, E<lt>dpavlin@rot13.orgE<gt> |
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=head1 COPYRIGHT AND LICENSE |
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Copyright (C) 2003 by Dobrica Pavlinusic |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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=cut |
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1; |