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#!perl

our $DATE = '2016-03-10'; # DATE
our $VERSION = '0.05'; # VERSION

use 5.010001;
use strict;
use warnings;

use Getopt::Long;

my %Opts = (
    input  => 'json',
    output => 'Console',
);
my $Input;
my @Output;

sub parse_cmdline {
    my $res = GetOptions(
        'input|i=s'  => \$Opts{input},
        'output|o=s' => \$Opts{output},
        'version|v'  => sub {
            say "pretty version ", ($main::VERSION // '?');
            exit 0;
        },
        'help|h'     => sub {
            print <<USAGE;
Usage:
  pretty [OPTIONS] < INPUT
  pretty --version
  pretty --help
Examples:
  pretty -o YAML data.json
Options:
  --input=s, -i   Input format (json, yaml, perl; default is json).
  --output=s, -o  Output format (json, yaml, perl, or any formatter module name;
                  default is Console).
Consult manpage/documentation for more details.
USAGE
            exit 0;
        },
    );
    exit 99 if !$res;
}

sub get_input {
    local $/;
    if ($Opts{input} eq 'json') {
        require JSON::MaybeXS;
        $Input = JSON::MaybeXS->new->allow_nonref->decode(~~<>);
    } elsif ($Opts{input} eq 'yaml') {
        require YAML::Syck;
        $Input = YAML::Syck::Load(~~<>);
    } elsif ($Opts{input} eq 'perl') {
        $Input = eval(~~<>);
    } else {
        warn "Unknown input format, ".
            "refer to documentation for available formats\n";
        exit 99;
    }
}

sub show_output {
    my $module;
    if ($Opts{output} eq 'json') {
        $module = 'JSON';
    } elsif ($Opts{output} eq 'yaml') {
        $module = 'YAML';
    } elsif ($Opts{output} eq 'perl') {
        $module = 'Perl';
    } elsif ($Opts{output} !~ /\A[A-Za-z0-9_]+\z/) {
        die "Invalid output format, ".
            "refer to documentation for available formats\n";
        exit 99;
    } else {
        $module = $Opts{output};
    }
    require Data::Format::Pretty;
    print Data::Format::Pretty::format_pretty($Input, {module=>$module});
}

# MAIN

parse_cmdline();
get_input();
show_output();

1;
# ABSTRACT: Format data structure prettily
# PODNAME: pretty

__END__

=pod

=encoding UTF-8

=head1 NAME

pretty - Format data structure prettily

=head1 VERSION

This document describes version 0.05 of pretty (from Perl distribution App-pretty), released on 2016-03-10.

=head1 SYNOPSIS

Usage:

 % pretty [OPTIONS] < INPUT

Examples:

 % echo '[1..5]' | pretty -i perl
 .----.
 |  1 |
 |  2 |
 |  3 |
 |  4 |
 |  5 |
 `----'

 % cat celine-dion-album-sales.json
 [
   {
     "lang": "en",
     "sales": 3000000,
     "title": "unison",
     "year": 1990
   },
   {
     "lang": "en",
     "sales": 5300000,
     "title": "celine dion",
     "year": 1992
   },
   {
     "lang": "en",
     "sales": 16600000,
     "title": "the color of my love",
     "year": 1993
   },
   ...
 ]

 % pretty celine-dion-album-sales.json
 .--------------------------------------------------------------.
 | lang      sales   tags        title                     year |
 |                                                              |
 | en      3000000               unison                    1990 |
 | en      5300000               celine dion               1992 |
 | en     16600000               the color of my love      1993 |
 | en     30300000               falling into you          1996 |
 | en     32100000               let's talk about love     1997 |
 | en     12100000   christmas   these are special times   1998 |
 | en     10500000               a new day has come        2002 |
 | en      5100000               one heart                 2003 |
 | en      2600000               miracle                   2004 |
 | en      3400000               taking chances            2007 |
 | en      1300000               loved me back to life     2013 |
 `--------------------------------------------------------------'

=head1 DESCRIPTION

This script formats data structure using L<Data::Format::Pretty>. You can use it
to quickly visualize a data structure on a console. See documentation of
Data::Format::Pretty for more details.

It accepts input as JSON, or several other alternative formats (see the C<-i>
option). It by default outputs the data using the C<Console> formatter module