<?php
/**
 * @copyright Copyright (C) 2020, Friendica
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

use Friendica\App;
use Friendica\Core\Renderer;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Module\Security\Login;
use Friendica\Security\OAuth1\OAuthRequest;
use Friendica\Security\OAuth1\OAuthUtil;

require_once __DIR__ . '/../include/api.php';

function oauth_get_client(OAuthRequest $request)
{
	$params = $request->get_parameters();
	$token = $params['oauth_token'];

	$r = q("SELECT `clients`.*
			FROM `clients`, `tokens`
			WHERE `clients`.`client_id`=`tokens`.`client_id`
			AND `tokens`.`id`='%s' AND `tokens`.`scope`='request'", DBA::escape($token));

	if (!DBA::isResult($r)) {
		return null;
	}

	return $r[0];
}

function api_post(App $a)
{
	if (!local_user()) {
		notice(DI::l10n()->t('Permission denied.'));
		return;
	}

	if (count($a->user) && !empty($a->user['uid']) && $a->user['uid'] != local_user()) {
		notice(DI::l10n()->t('Permission denied.'));
		return;
	}
}

function api_content(App $a)
{
	if (DI::args()->getCommand() == 'api/oauth/authorize') {
		/*
		 * api/oauth/authorize interact with the user. return a standard page
		 */

		DI::page()['template'] = "minimal";

		// get consumer/client from request token
		try {
			$request = OAuthRequest::from_request();
		} catch (Exception $e) {
			echo "<pre>";
			var_dump($e);
			exit();
		}

		if (!empty($_POST['oauth_yes'])) {
			$app = oauth_get_client($request);
			if (is_null($app)) {
				return "Invalid request. Unknown token.";
			}
			$consumer = new OAuthConsumer($app['client_id'], $app['pw'], $app['redirect_uri']);

			$verifier = md5($app['secret'] . local_user());
			DI::config()->set("oauth", $verifier, local_user());

			if ($consumer->callback_url != null) {
				$params = $request->get_parameters();
				$glue = "?";
				if (strstr($consumer->callback_url, $glue)) {
					$glue = "?";
				}
				DI::baseUrl()->redirect($consumer->callback_url . $glue . 'oauth_token=' . OAuthUtil::urlencode_rfc3986($params['oauth_token']) . '&oauth_verifier=' . OAuthUtil::urlencode_rfc3986($verifier));
				exit();
			}

			$tpl = Renderer::getMarkupTemplate("oauth_authorize_done.tpl");
			$o = Renderer::replaceMacros($tpl, [
				'$title' => DI::l10n()->t('Authorize application connection'),
				'$info' => DI::l10n()->t('Return to your app and insert this Securty Code:'),
				'$code' => $verifier,
			]);

			return $o;
		}

		if (!local_user()) {
			/// @TODO We need login form to redirect to this page
			notice(DI::l10n()->t('Please login to continue.'));
			return Login::form(DI::args()->getQueryString(), false, $request->get_parameters());
		}
		//FKOAuth1::loginUser(4);

		$app = oauth_get_client($request);
		if (is_null($app)) {
			return "Invalid request. Unknown token.";
		}

		$tpl = Renderer::getMarkupTemplate('oauth_authorize.tpl');
		$o = Renderer::replaceMacros($tpl, [
			'$title' => DI::l10n()->t('Authorize application connection'),
			'$app' => $app,
			'$authorize' => DI::l10n()->t('Do you want to authorize this application to access your posts and contacts, and/or create new posts for you?'),
			'$yes' => DI::l10n()->t('Yes'),
			'$no' => DI::l10n()->t('No'),
		]);

		return $o;
	}

	echo api_call($a);
	exit();
}
