Register "Registration" as alternative login option via the new public API

Signed-off-by: Joas Schilling <coding@schilljs.com>

appinfo/app.php

@@ -1,17 +0,0 @@
-<?php
-/**
- * ownCloud - registration
- *
- * This file is licensed under the Affero General Public License version 3 or
- * later. See the COPYING file.
- *
- * @author Pellaeon Lin <pellaeon@hs.ntnu.edu.tw>
- * @copyright Pellaeon Lin 2014
- */
-
-\OCP\Util::addStyle('registration', 'register-button');
-\OC_App::registerLogIn([
-	'name' => \OC::$server->getL10N('registration')->t('Register'),
-	'href' => \OC::$server->getURLGenerator()->linkToRoute('registration.register.askEmail'),
-	'style' => 'register-button',
-]);

appinfo/info.xml

@@ -37,10 +37,7 @@ Send BTC to `33pStaSaf4sDUA8XBAHTq7ZDQpCVFQArxQ`
 	<repository>https://github.com/nextcloud/registration</repository>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/registration/master/appinfo/screenshot.png</screenshot>
 	<dependencies>
-		<database>sqlite</database>
-		<database>pgsql</database>
-		<database min-version="5.5">mysql</database>
-		<nextcloud min-version="17" max-version="20" />
+		<nextcloud min-version="20" max-version="20" />
 	</dependencies>
 	<settings>
 		<admin>OCA\Registration\Settings\RegistrationSettings</admin>

lib/AppInfo/Application.php

@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2017 Julius Härtl <jus@bitgrid.net>
  *
@@ -24,18 +26,24 @@
 namespace OCA\Registration\AppInfo;
 
 use OCA\Registration\Capabilities;
+use OCA\Registration\RegistrationLoginOption;
 use OCP\AppFramework\App;
-use OC\Authentication\Token\IProvider;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
+
+class Application extends App implements IBootstrap {
+	public const APP_ID = 'registration';
 
-class Application extends App {
 	public function __construct() {
-		parent::__construct('registration');
+		parent::__construct(self::APP_ID);
+	}
 
-		$container = $this->getContainer();
-		$container->registerService(IProvider::class, function ($c) {
-			return \OC::$server->query(IProvider::class); // TODO needed?
-		});
+	public function register(IRegistrationContext $context): void {
+		$context->registerAlternativeLogin(RegistrationLoginOption::class);
+		$context->registerCapability(Capabilities::class);
+	}
 
-		$container->registerCapability(Capabilities::class);
+	public function boot(IBootContext $context): void {
 	}
 }

lib/RegistrationLoginOption.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020 Joas Schilling <coding@schilljs.com>
+ *
+ * @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\Registration;
+
+use OCA\Registration\AppInfo\Application;
+use OCP\Authentication\IAlternativeLogin;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\Util;
+
+class RegistrationLoginOption implements IAlternativeLogin {
+
+	/** @var IURLGenerator */
+	protected $url;
+	/** @var IL10N */
+	protected $l;
+
+	public function __construct(IURLGenerator $url,
+								IL10N $l) {
+		$this->url = $url;
+		$this->l = $l;
+	}
+
+	public function getLabel(): string {
+		return $this->l->t('Register');
+	}
+
+	public function getLink(): string {
+		return $this->url->linkToRoute('registration.register.askEmail');
+	}
+
+	public function getClass(): string {
+		return 'register-button';
+	}
+
+	public function load(): void {
+		Util::addStyle(Application::APP_ID, 'register-button');
+	}
+}