package App::Countdown; use 5.008; use strict; use warnings FATAL => 'all'; use Time::HiRes qw(sleep time); use POSIX qw(); use IO::Handle; use Getopt::Long qw(GetOptionsFromArray); use Pod::Usage; use Carp; =head1 NAME App::Countdown - wait a certain amount of time while displaying the remainging time. =head1 VERSION Version 0.3.0 =cut our $VERSION = '0.3.0'; =head1 SYNOPSIS use App::Countdown; App::Countdown->new({ argv => [@ARGV] })->run(); =head1 SUBROUTINES/METHODS =head2 new A constructor. Accepts the argv named arguments. =head2 run Runs the program. =cut sub new { my $class = shift; my $self = bless {}, $class; $self->_init(@_); return $self; } sub _delay { my $self = shift; if (@_) { $self->{_delay} = shift; } return $self->{_delay}; } sub _calc_delay { my ($self, $delay_spec) = @_; if (my ($n, $qualifier) = $delay_spec =~ /\A((?:[1-9][0-9]*(?:\.\d*)?)|(?:0\.\d+))([mhs]?)\z/) { return int($n * ($qualifier eq 'h' ? (60 * 60) : $qualifier eq 'm' ? 60 : 1 ) ); } else { die "Invalid delay. Must be a positive and possibly fractional number, possibly followed by s, m, or h"; } } sub _init { my ($self, $args) = @_; my $argv = [@{$args->{argv}}]; my $help = 0; my $man = 0; my $version = 0; if (! (my $ret = GetOptionsFromArray( $argv, 'help|h' => \$help, man => \$man, version => \$version, ))) { die "GetOptions failed!"; } if ($help) { pod2usage(1); } if ($man) { pod2usage(-verbose => 2); } if ($version) { print "countdown version $VERSION .\n"; exit(0); } my $delay = shift(@$argv); if (!defined $delay) { Carp::confess ("You should pass a number of seconds."); } $self->_delay( $self->_calc_delay($delay) ); return; } sub run { my ($self) = @_; STDOUT->autoflush(1); my $delay = $self->_delay; my $start = time(); my $end = $start + $delay; my $last_printed; while ((my $t = time()) < $end) { my $new_to_print = POSIX::floor($end - $t); if (!defined($last_printed) or $new_to_print != $last_printed) { $last_printed = $new_to_print; print "Remaining $new_to_print/$delay", ' ' x 40, "\r"; } sleep(0.1); } return; } 1; =head1 AUTHOR Shlomi Fish, L<http://www.shlomifish.org/>, C<< <shlomif at cpan.org> >> . =head1 BUGS Please report any bugs or feature requests to C<bug-app-countdown at rt.cpan.org>, or through the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=App-Countdown>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. =head1 SUPPORT You can find documentation for this module with the perldoc command. perldoc App::Countdown You can also look for information at: =over 4 =item * RT: CPAN's request tracker (report bugs here) L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=App-Countdown> =item * AnnoCPAN: Annotated CPAN documentation L<http://annocpan.org/dist/App-Countdown> =item * CPAN Ratings L<http://cpanratings.perl.org/d/App-Countdown> =item * Search CPAN L<http://search.cpan.org/dist/App-Countdown/> =back =head1 ACKNOWLEDGEMENTS =head1 LICENSE AND COPYRIGHT Copyright 2012 Shlomi Fish. This program is distributed under the MIT (X11) License: L<http://www.opensource.org/licenses/mit-license.php> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. =cut 1; # End of App::Countdown