#!/usr/bin/env perl

use utf8;
use strict;
use warnings;

use RDF::Trine qw(iri blank literal);
use RDF::Trine::Parser;
use RDF::Trine::Parser::LineProtocol;
use RDF::Trine::Error qw(:try);

if (scalar(@ARGV) and $ARGV[0] =~ /-h/) {
	die usage();
}

my $cli	= RDF::Trine::Parser::LineProtocol->new();
my $model	= RDF::Trine::Model->new();

my $out	= \*STDOUT;

print $out "# RDF::Trine-${RDF::Trine::VERSION}\n";
try {
	while (defined(my $line = <>)) {
		$cli->execute_line( $line, $model, $out );
	}
} catch RDF::Trine::Error with {
	my $e	= shift;
	warn $e->stacktrace;
};

### pod & usage in one
sub usage {
    my $usage .= << '=cut';
=pod

=head1 NAME

    cliapi - a simple command line interface to an in-memory RDF quad store using the RDF Line Protocol

=head1 DESCRIPTION

    cliapi is a simple program which maintains an in-memory RDF quad store and allows inserting,
    deleting, and querying data using the RDF Line Protocol format.

=head1 SYNOPSIS

    cliapi
    ptar -h
    ptar --help

=head1 OPTIONS

    h   Prints this help message

=head1 SEE ALSO

    L<RDF::Trine::Parser::LineProtocol>.

=cut

    ### strip the pod directives
    $usage =~ s/=pod\n//g;
    $usage =~ s/=head1 //g;

    ### add some newlines
    $usage .= $/.$/;

    return $usage;
}