Generate a valid URL for link notification

fixes #23197

* Updated unit test

core/ajax/share.php

 				\OC::$server->getL10N('lib'),
 				\OC::$server->getMailer(),
 				\OC::$server->getLogger(),
-				$defaults
+				$defaults,
+				\OC::$server->getURLGenerator()
 			);
 			$result = $mailNotification->sendInternalShareMail($recipientList, $itemSource, $itemType);
 
 				\OC::$server->getL10N('lib'),
 				\OC::$server->getMailer(),
 				\OC::$server->getLogger(),
-				$defaults
+				$defaults,
+				\OC::$server->getURLGenerator()
 			);
 
 			$expiration = null;

lib/private/share/mailnotifications.php

 
 use DateTime;
 use OCP\IL10N;
+use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\Mail\IMailer;
 use OCP\ILogger;
 	private $defaults;
 	/** @var ILogger */
 	private $logger;
+	/** @var IURLGenerator */
+	private $urlGenerator;
 
 	/**
 	 * @param IUser $user
 	 * @param IMailer $mailer
 	 * @param ILogger $logger
 	 * @param Defaults $defaults
+	 * @param IURLGenerator $urlGenerator
 	 */
 	public function __construct(IUser $user,
 								IL10N $l10n,
 								IMailer $mailer,
 								ILogger $logger,
-								Defaults $defaults) {
+								Defaults $defaults,
+								IURLGenerator $urlGenerator) {
 		$this->l = $l10n;
 		$this->user = $user;
 		$this->mailer = $mailer;
 		$this->logger = $logger;
 		$this->defaults = $defaults;
+		$this->urlGenerator = $urlGenerator;
 
 		$this->replyTo = $this->user->getEMailAddress();
 		$this->senderDisplayName = $this->user->getDisplayName();
 				);
 			}
 
-			$link = Util::linkToAbsolute('files', 'index.php', $args);
+			$link = $this->urlGenerator->linkToRouteAbsolute(
+				'files.view.index',
+				$args
+			);
 
 			list($htmlBody, $textBody) = $this->createMailBody($filename, $link, $expiration, 'internal');
 

tests/lib/share/MailNotificationsTest.php

 use OCP\Mail\IMailer;
 use OCP\ILogger;
 use OCP\Defaults;
+use OCP\IURLGenerator;
 
 /**
  * Class MailNotificationsTest
 	private $defaults;
 	/** @var IUser | PHPUnit_Framework_MockObject_MockObject */
 	private $user;
+	/** @var IURLGenerator | PHPUnit_Framework_MockObject_MockObject */
+	private $urlGenerator;
 
 
 	public function setUp() {
 				->disableOriginalConstructor()->getMock();
 		$this->user = $this->getMockBuilder('\OCP\IUser')
 				->disableOriginalConstructor()->getMock();
+		$this->urlGenerator = $this->getMock('\OCP\IURLGenerator');
 
 		$this->l10n->expects($this->any())
 			->method('t')
 			$this->l10n,
 			$this->mailer,
 			$this->logger,
-			$this->defaults
+			$this->defaults,
+			$this->urlGenerator
 		);
 
 		$this->assertSame([], $mailNotifications->sendLinkShareMail('lukas@owncloud.com', 'MyFile', 'https://owncloud.com/file/?foo=bar', 3600));
 			$this->l10n,
 			$this->mailer,
 			$this->logger,
-			$this->defaults
+			$this->defaults,
+			$this->urlGenerator
 		);
 		$this->assertSame([], $mailNotifications->sendLinkShareMail($to, 'MyFile', 'https://owncloud.com/file/?foo=bar', 3600));
 	}
 			$this->l10n,
 			$this->mailer,
 			$this->logger,
-			$this->defaults
+			$this->defaults,
+			$this->urlGenerator
 		);
 
 		$this->assertSame(['lukas@owncloud.com'], $mailNotifications->sendLinkShareMail('lukas@owncloud.com', 'MyFile', 'https://owncloud.com/file/?foo=bar', 3600));
 				$this->l10n,
 				$this->mailer,
 				$this->logger,
-				$this->defaults]);
+				$this->defaults,
+				$this->urlGenerator
+		]);
 
 		$mailNotifications->method('getItemSharedWithUser')
 			->withAnyParameters()
 				->method('getDisplayName')
 				->willReturn('Recipient');
 
+		$this->urlGenerator->expects($this->once())
+			->method('linkToRouteAbsolute')
+			->with(
+				$this->equalTo('files.view.index'),
+				$this->equalTo([
+					'dir' => '/',
+					'scrollto' => 'welcome.txt'
+				])
+			);
+
 		$recipientList = [$recipient];
 		$result = $mailNotifications->sendInternalShareMail($recipientList, '3', 'file');
 		$this->assertSame([], $result);