#!/usr/bin/perl
# Copyright René Wagner 2020
# licenced under BSD 3-Clause licence
# https://src.clttr.info/rwa/gmnifaq

package gmnifaq;
use strict;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT    = qw(config footer write_response %CONF %RC); # automatically exported subs

# enable UTF-8 mode for everything	
use utf8;
binmode STDOUT, ':utf8';
binmode STDERR, ':utf8';

our %CONF = ();

# define return codes
our %RC = (
	'INPUT', 10,
	'SENSITIVE_INPUT', 11,
	'SUCCESS', 20,
	'TEMPORARY_REDIRECT', 30,
	'PERMANENT_REDIRECT', 31,
	'TEMPORARY_FAILURE', 40,
	'SERVER_UNAVAILABLE', 41,
	'CGI_ERROR', 42,
	'PROXY_ERROR', 43,
	'SLOW_DOWN', 44,
	'PERMANENT_FAILURE', 50,
	'NOT_FOUND', 51,
	'GONE', 52,
	'PROXY_REQUEST_REFUSE', 53,
	'BAD_REQUEST', 59,
	'CLIENT_CERT_REQUIRED', 60,
	'CERT_NOT_AUTHORISED', 61,
	'CERT_NOT_VALID', 62
);

sub config
{
	$CONF{'name'} = 'gmnifaq';
	$CONF{'intro'} = 'Welcome to gmnifaq!';
	if ( -f './gmnifaq.conf' ) { do './gmnifaq.conf'; }

	if ( !-f 'data/data.sqlite' ) { write_response('PERMANENT_FAILURE', 'Permanent failure', undef) };
	
	$CONF{'dsn'} = "DBI:SQLite:dbname=data/data.sqlite";
}

sub footer
{
	return ('', '=> ./index.pl [home]', '=> https://src.clttr.info/rwa/gmnifaq powered by gmnifaq');
}

sub write_response
{
	my ($returncode, $meta, @content) = @_;
	
	defined($RC{$returncode}) or die "Unknown response code!";

	printf("%d %s\r\n", $RC{$returncode}, ($meta eq '') ? $returncode : $meta);
	foreach (@content) {
		print("$_\r\n");
	}

	exit;
}

1;