<?php

/**
 * @author Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @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 <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\TwoFactorBackupCodes\Provider;

use OCA\TwoFactorBackupCodes\Service\BackupCodeStorage;
use OCP\Authentication\TwoFactorAuth\IProvider;
use OCP\IL10N;
use OCP\IUser;
use OCP\Template;

class BackupCodesProvider implements IProvider {

	/** @var BackupCodeStorage */
	private $storage;

	/** @var IL10N */
	private $l10n;

	public function __construct(BackupCodeStorage $storage, IL10N $l10n) {
		$this->l10n = $l10n;
		$this->storage = $storage;
	}

	/**
	 * Get unique identifier of this 2FA provider
	 *
	 * @return string
	 */
	public function getId() {
		return 'backup_codes';
	}

	/**
	 * Get the display name for selecting the 2FA provider
	 *
	 * @return string
	 */
	public function getDisplayName() {
		return $this->l10n->t('Backup code');
	}

	/**
	 * Get the description for selecting the 2FA provider
	 *
	 * @return string
	 */
	public function getDescription() {
		return $this->l10n->t('Use backup code');
	}

	/**
	 * Get the template for rending the 2FA provider view
	 *
	 * @param IUser $user
	 * @return Template
	 */
	public function getTemplate(IUser $user) {
		$tmpl = new Template('twofactor_backupcodes', 'challenge');
		return $tmpl;
	}

	/**
	 * Verify the given challenge
	 *
	 * @param IUser $user
	 * @param string $challenge
	 */
	public function verifyChallenge(IUser $user, $challenge) {
		return $this->storage->validateCode($user, $challenge);
	}

	/**
	 * Decides whether 2FA is enabled for the given user
	 *
	 * @param IUser $user
	 * @return boolean
	 */
	public function isTwoFactorAuthEnabledForUser(IUser $user) {
		return $this->storage->hasBackupCodes($user);
	}

}