package Data::Unixish::randstr;
use 5.010;
use strict;
use syntax 'each_on_array'; # to support perl < 5.12
use warnings;
#use Log::Any '$log';
use Data::Unixish::Util qw(%common_args);
our $VERSION = '1.48'; # VERSION
our %SPEC;
my $def_charset = 'AZaz09';
my %charsets = (
'09' => '0123456789',
'AZ' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
'az' => 'abcdefghijklmnopqrstuvwxyz',
'AZaz' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz',
'AZaz09' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
);
my $charsets_desc = <<'_';
`az` is basic Latin lowercase letters. `AZ` uppercase letters. `AZaz` lowercase
and uppercase letters. `AZaz09` lowercase + uppercase letters + Arabic numbers.
`09` numbers.
_
$SPEC{randstr} = {
v => 1.1,
summary => 'Generate a stream of random strings',
args => {
%common_args,
min_len => {
summary => 'Minimum possible length (inclusive)',
schema => ['int*', min=>0, default=>16],
cmdline_aliases => { a=>{} },
},
max_len => {
summary => 'Maximum possible length (inclusive)',
schema => ['int*', min=>0, default=>16],
cmdline_aliases => {
b => {},
c => {
summary => 'Set length (min_len and max_len)',
code => sub {
my ($args, $val) = @_;
$args->{min_len} = $val;
$args->{max_len} = $val;
},
},
},
},
charset => {
summary => 'Character set to use',
description => $charsets_desc,
schema => ['str*', default=>$def_charset,
in=>[sort keys %charsets]],
},
num => {
summary => 'Number of strings to generate, -1 means infinite',
schema => ['int*', default=>1],
cmdline_aliases => { n=>{} },
},
},
tags => [qw/text gen-data/],
'x.dux.is_stream_output' => 1, # for duxapp < 1.41, will be removed later
'x.app.dux.is_stream_output' => 1,
};
sub randstr {
my %args = @_;
my ($in, $out) = ($args{in}, $args{out});
# XXX schema
my $min_len = $args{min_len} // 16; $min_len = 0 if $min_len < 0;
my $max_len = $args{max_len} // 16; $max_len = 0 if $max_len < 0;
my $charset = $args{charset};
my $chars = $charsets{$charset};
return [400, "Unknown charset"] unless defined($chars);
my $len_chars = length($chars);
my $num = $args{num} // 1;
my $i = 0;
while (1) {
last if $num >= 0 && ++$i > $num;
my $len = $min_len + int(rand()*($max_len-$min_len+1));
my $rand = join "", map {substr($chars, $len_chars*rand(), 1)} 1..$len;
push @$out, $rand;
}
[200, "OK"];
}
1;
# ABSTRACT: Generate a stream of random strings
__END__
=pod
=encoding UTF-8
=head1 NAME
Data::Unixish::randstr - Generate a stream of random strings
=head1 VERSION
This document describes version 1.48 of Data::Unixish::randstr (from Perl distribution Data-Unixish), released on 2014-12-10.
=head1 SYNOPSIS
In command line:
% dux randstr
trWFSsAwZH4Cli90
% dux randstr --min-len 1 --max-len 5 --charset AZ -n 5
WXY
KQDCG
MGS
QMEH
JDOCK
=head1 FUNCTIONS
=head2 randstr(%args) -> [status, msg, result, meta]
Generate a stream of random strings.
Arguments ('*' denotes required arguments):
=over 4
=item * B<charset> => I<str> (default: "AZaz09")
Character set to use.
C<az> is basic Latin lowercase letters. C<AZ> uppercase letters. C<AZaz> lowercase
and uppercase letters. C<AZaz09> lowercase + uppercase letters + Arabic numbers.
C<09> numbers.
=item * B<in> => I<array>
Input stream (e.g. array or filehandle).
=item * B<max_len> => I<int> (default: 16)
Maximum possible length (inclusive).
=item * B<min_len> => I<int> (default: 16)
Minimum possible length (inclusive).
=item * B<num> => I<int> (default: 1)
Number of strings to generate, -1 means infinite.
=item * B<out> => I<any>
Output stream (e.g. array or filehandle).
=back
Return value:
Returns an enveloped result (an array).
First element (status) is an integer containing HTTP status code
(200 means OK, 4xx caller error, 5xx function error). Second element
(msg) is a string containing error message, or 'OK' if status is
200. Third element (result) is optional, the actual result. Fourth
element (meta) is called result metadata and is optional, a hash
that contains extra information.
(any)
=head1 TODO
More choices in character sets: full ASCII, Unicode, etc.
Allow users to specify their own charset.
=head1 SEE ALSO
=head1 HOMEPAGE
Please visit the project's homepage at L<https://metacpan.org/release/Data-Unixish>.
=head1 SOURCE
Source repository is at L<https://github.com/perlancar/perl-Data-Unixish>.
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Unixish>
When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.
=head1 AUTHOR
perlancar <perlancar@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut