#!perl

use 5.010001;
use strict;
use warnings;

use Getopt::Long;
use JSON::Path;

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2023-02-14'; # DATE
our $DIST = 'App-jpath'; # DIST
our $VERSION = '0.050'; # VERSION

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

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

    if (!@ARGV) {
        warn "Please specify JSONPath expression\n";
        exit 99;
    }
    $Expr = shift @ARGV;
}

sub get_input {
    local $/;
    if ($Opts{input} eq 'json') {
        require JSON::MaybeXS;
        $Input = JSON::MaybeXS->new->allow_nonref->decode(scalar <>);
    } elsif ($Opts{input} eq 'yaml') {
        require YAML::Syck;
        $Input = YAML::Syck::Load(scalar <>);
    } elsif ($Opts{input} eq 'perl') {
        $Input = eval(scalar <>); ## no critic: BuiltinFunctions::ProhibitStringyEval
    } else {
        warn "Unknown input format, ".
            "refer to documentation for available formats\n";
        exit 99;
    }
}

sub run {
    require JSON::Path;
    local $JSON::Path::Safe = 0;
    @Output = JSON::Path->new($Expr)->values($Input);
}

sub show_output {
    if ($Opts{output} eq 'json') {
        require Data::Format::Pretty::JSON;
        print Data::Format::Pretty::JSON::format_pretty(\@Output);
    } elsif ($Opts{output} eq 'yaml') {
        require Data::Format::Pretty::YAML;
        print Data::Format::Pretty::YAML::format_pretty(\@Output);
    } elsif ($Opts{output} eq 'perl') {
        require Data::Format::Pretty::Perl;
        print Data::Format::Pretty::Perl::format_pretty(\@Output);
    } elsif ($Opts{output} eq 'pretty') {
        require Data::Format::Pretty::Console;
        print Data::Format::Pretty::Console::format_pretty(\@Output);
    } else {
        warn "Unknown output format, ".
            "refer to documentation for available formats\n";
        exit 99;
    }
}

# MAIN

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

1;
# ABSTRACT: Command-line tool for JSON::Path
# PODNAME: jpath

__END__

=pod

=encoding UTF-8

=head1 NAME

jpath - Command-line tool for JSON::Path

=head1 VERSION

This document describes version 0.050 of jpath (from Perl distribution App-jpath), released on 2023-02-14.

=head1 SYNOPSIS

Usage:

 % jpath [OPTIONS] <JSONPATH_EXPR> < data.json

=head1 DESCRIPTION

This script provides a simple, relatively straightforward command-line interface
for L<JSON::Path>. It accepts JSON input as well as several other formats; and
similarly can output JSON or alternative formats.

This script sets C<$JSON::Path::Safe> to 0 so you can eval Perl expressions.

=head1 EXIT CODES

0 on success.

99 on command-line options error.

=head1 OPTIONS

=over

=item * --input=STR, -i

Pick input format. Available formats: json, yaml (using L<YAML::Syck>), perl.
Default is json.

=item * --output=STR, -o

Pick output format. Available formats: json, yaml, perl, and pretty (using
L<Data::Format::Pretty::Console>). Default is json.

=back

=head1 FAQ

=head2 How do I turn off colors and line numbers?

Use C<COLOR=0> and C<LINUM=0>, respectively. For example:

 % LINUM=0 jpath ...

See L<Data::Format::Pretty::JSON> and other Data::Format::Pretty::* for more
details.

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/App-jpath>.

=head1 SOURCE

Source repository is at L<https://github.com/perlancar/perl-App-jpath>.

=head1 SEE ALSO

L<JSON::Path>.

L<App::dpath>, a similar command-line tool, for L<Data::DPath>.

Someone should perhaps also write C<tpath> for L<TPath>
(L<TPath::Forester::Ref>).

L<jsonpath>, L<jcut> (from L<App::PipeFilter>). A command-line tool that works
on a per-record basis.

L<App::jt>, a command-line tool that deals specifically with JSON input and in
addition to doing JSONPath also provides some extra tools like simple filtering
capability for simple structures (e.g. arrays, array of hashes), convert to CSV,
etc.

L<App::SerializeUtils>, various command-line scripts to convert or check data
structure in various formats.

L<jsonsel> (from L<App::jsonsel>) uses CSS-like selector syntax to select nodes
from JSON.

jq, L<https://stedolan.github.io/jq/>

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 CONTRIBUTING


To contribute, you can send patches by email/via RT, or send pull requests on
GitHub.

Most of the time, you don't need to build the distribution yourself. You can
simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your
system), you can install L<Dist::Zilla>,
L<Dist::Zilla::PluginBundle::Author::PERLANCAR>,
L<Pod::Weaver::PluginBundle::Author::PERLANCAR>, and sometimes one or two other
Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond
that are considered a bug and can be reported to me.

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2023, 2016, 2014 by perlancar <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.

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=App-jpath>

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.

=cut