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#!/usr/bin/env perl
# AP-Client: CLI-based client / toolbox for ActivityPub
# Copyright © 2020-2023 AP-Client Authors <https://hacktivis.me/git/ap-client/>
# SPDX-License-Identifier: BSD-3-Clause
use strict;
use utf8;
use open ":std", ":encoding(UTF-8)";
our $VERSION = 'v0.1.4';

use Getopt::Std;
use LWP::UserAgent;
use HTTP::Request::Common;
use JSON;
use App::ActivityPubClient qw(print_object);

=head1 NAME

ap-fetch - Fetch ActivityStream object, optionally pretty printing it

=head1 SYNOPSIS

B<ap-fetch> [-r|-j|-u <user:pass>] <URI>

=head1 DESCRIPTION

ap-fetch fetches an URI, decodes it as an ActivityStream object.

=over 4

=item B<-j>

Pipe into jq(1)

=item B<-r>

Raw output, print server's output without any decoding

=item B<-u user:pass>

Pass username and password for HTTP Basic Auth.

=back

=head1 LICENSE

BSD-3-Clause

=cut

my %options = ();
my $ua      = LWP::UserAgent->new;

getopts("rju:", \%options);

if ($#ARGV != 0) {
	print "usage: ap-fetch.pl [-r|-j|-u user:pass] <url>\n";
	print " -j  Pipe into jq(1)\n";
	print " -r  Raw output\n";
	print " -u user:pass  HTTP Basic Auth credentials\n";
	print
"By default, when -j and -r are absent it pipes the data into ap-represent.pl.\n";
	exit 1;
}

$ua->agent("AP-Client fetch <https://hacktivis.me/git/ap-client/>");
my $req = HTTP::Request->new(GET => $ARGV[0]);
$req->header('Accept' => 'application/activity+json');

if (defined $options{u}) {
	my ($user, $password) = split(/:/, $options{u});
	$req->authorization_basic($user, $password);
}

my $res = $ua->request($req);

if ($res->is_success) {
	my $content_type  = $res->header("Content-Type");
	my $content_match = qr{^application/([^+]*\+)?json(; .*)?};

	if ($content_type =~ $content_match) {
		if (defined $options{r}) {
			print $res->content;
		} elsif (defined $options{j}) {
			open(my $pipe_out, '|-', 'jq .')
			  or die "Couldn't open a pipe into jq: $!";
			print $pipe_out $res->content;
			close($pipe_out);
		} else {
			my $object = decode_json($res->content);
			print_object(1, $object);
			print "\n";
		}
	} else {
		print STDERR "Got \"$content_type\" instead of \"$content_match\"\n";
		exit 1;
	}
} else {
	print STDERR "Got ", $res->status_line, " instead of 2xx\n";
	exit 1;
}