Provide the proper language to the mailer

Else we can't properly translate the footer in the recipients e-mail
language.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

apps/settings/tests/Mailer/NewUserMailHelperTest.php

@@ -79,7 +79,7 @@ protected function setUp(): void {
 		$template = new EMailTemplate(
 			$this->defaults,
 			$this->urlGenerator,
-			$this->l10n,
+			$this->l10nFactory,
 			'test.TestTemplate',
 			[]
 		);
@@ -378,8 +378,8 @@ public function testGenerateTemplateWithPasswordResetToken() {
 Install Client: https://nextcloud.com/install/#install-clients
 
 
--- 
-TestCloud - 
+--
+TestCloud -
 This is an automatically sent email, please do not reply.
 EOF;
 

apps/theming/lib/ThemingDefaults.php

@@ -145,8 +145,8 @@ public function getBaseUrl() {
 		return $this->config->getAppValue('theming', 'url', $this->url);
 	}
 
-	public function getSlogan() {
-		return \OCP\Util::sanitizeHTML($this->config->getAppValue('theming', 'slogan', parent::getSlogan()));
+	public function getSlogan(?string $lang = null) {
+		return \OCP\Util::sanitizeHTML($this->config->getAppValue('theming', 'slogan', parent::getSlogan($lang)));
 	}
 
 	public function getImprintUrl() {

lib/private/Mail/EMailTemplate.php

@@ -35,8 +35,8 @@
 namespace OC\Mail;
 
 use OCP\Defaults;
-use OCP\IL10N;
 use OCP\IURLGenerator;
+use OCP\L10N\IFactory;
 use OCP\Mail\IEMailTemplate;
 
 /**
@@ -52,8 +52,8 @@ class EMailTemplate implements IEMailTemplate {
 	protected $themingDefaults;
 	/** @var IURLGenerator */
 	protected $urlGenerator;
-	/** @var IL10N */
-	protected $l10n;
+	/** @var IFactory */
+	protected $l10nFactory;
 	/** @var string */
 	protected $emailId;
 	/** @var array */
@@ -350,21 +350,14 @@ class EMailTemplate implements IEMailTemplate {
 </table>
 EOF;
 
-	/**
-	 * @param Defaults $themingDefaults
-	 * @param IURLGenerator $urlGenerator
-	 * @param IL10N $l10n
-	 * @param string $emailId
-	 * @param array $data
-	 */
 	public function __construct(Defaults $themingDefaults,
 								IURLGenerator $urlGenerator,
-								IL10N $l10n,
+								IFactory $l10nFactory,
 								$emailId,
 								array $data) {
 		$this->themingDefaults = $themingDefaults;
 		$this->urlGenerator = $urlGenerator;
-		$this->l10n = $l10n;
+		$this->l10nFactory = $l10nFactory;
 		$this->htmlBody .= $this->head;
 		$this->emailId = $emailId;
 		$this->data = $data;

lib/private/Mail/Mailer.php

@@ -38,6 +38,7 @@
 use OCP\IL10N;
 use OCP\ILogger;
 use OCP\IURLGenerator;
+use OCP\L10N\IFactory;
 use OCP\Mail\IAttachment;
 use OCP\Mail\IEMailTemplate;
 use OCP\Mail\IMailer;
@@ -149,7 +150,7 @@ public function createEMailTemplate(string $emailId, array $data = []): IEMailTe
 		return new EMailTemplate(
 			$this->defaults,
 			$this->urlGenerator,
-			$this->l10n,
+			$this->l10nFactory,
 			$emailId,
 			$data
 		);

lib/private/Share20/Manager.php

@@ -894,9 +894,9 @@ protected function sendMailNotification(IL10N $l,
 		$initiatorEmail = $initiatorUser->getEMailAddress();
 		if($initiatorEmail !== null) {
 			$message->setReplyTo([$initiatorEmail => $initiatorDisplayName]);
-			$emailTemplate->addFooter($instanceName . ($this->defaults->getSlogan() !== '' ? ' - ' . $this->defaults->getSlogan() : ''));
+			$emailTemplate->addFooter($instanceName . ($this->defaults->getSlogan($l->getLanguageCode()) !== '' ? ' - ' . $this->defaults->getSlogan($l->getLanguageCode()) : ''));
 		} else {
-			$emailTemplate->addFooter();
+			$emailTemplate->addFooter('', $l->getLanguageCode());
 		}
 
 		$message->useTemplate($emailTemplate);

lib/private/legacy/defaults.php

@@ -215,12 +215,12 @@ public function getEntity() {
 	 * Returns slogan
 	 * @return string slogan
 	 */
-	public function getSlogan() {
+	public function getSlogan(?string $lang = null) {
 		if ($this->themeExist('getSlogan')) {
-			return $this->theme->getSlogan();
+			return $this->theme->getSlogan($lang);
 		} else {
 			if ($this->defaultSlogan === null) {
-				$l10n = \OC::$server->getL10N('lib');
+				$l10n = \OC::$server->getL10N('lib', $lang);
 				$this->defaultSlogan = $l10n->t('a safe home for all your data');
 			}
 			return $this->defaultSlogan;

lib/public/Defaults.php

@@ -137,8 +137,8 @@ public function getEntity() {
 	 * @return string
 	 * @since 6.0.0
 	 */
-	public function getSlogan() {
-		return $this->defaults->getSlogan();
+	public function getSlogan(?string $lang = null) {
+		return $this->defaults->getSlogan($lang);
 	}
 
 	/**

lib/public/Mail/IEMailTemplate.php

@@ -140,10 +140,11 @@ public function addBodyButton(string $text, string $url, $plainText = '');
 	 * Adds a logo and a text to the footer. <br> in the text will be replaced by new lines in the plain text email
 	 *
 	 * @param string $text If the text is empty the default "Name - Slogan<br>This is an automatically sent email" will be used
+	 * @param string $lang Optional language to set the default footer in
 	 *
 	 * @since 12.0.0
 	 */
-	public function addFooter(string $text = '');
+	public function addFooter(string $text = '', ?string $lang = null);
 
 	/**
 	 * Returns the rendered email subject as string

tests/lib/Mail/EMailTemplateTest.php

@@ -27,14 +27,15 @@
 use OCP\Defaults;
 use OCP\IL10N;
 use OCP\IURLGenerator;
+use OCP\L10N\IFactory;
 use Test\TestCase;
 
 class EMailTemplateTest extends TestCase {
 	/** @var Defaults|\PHPUnit_Framework_MockObject_MockObject */
 	private $defaults;
 	/** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
 	private $urlGenerator;
-	/** @var IL10N|\PHPUnit_Framework_MockObject_MockObject */
+	/** @var IFactory|\PHPUnit_Framework_MockObject_MockObject */
 	private $l10n;
 	/** @var EMailTemplate */
 	private $emailTemplate;
@@ -44,7 +45,11 @@ protected function setUp(): void {
 
 		$this->defaults = $this->createMock(Defaults::class);
 		$this->urlGenerator = $this->createMock(IURLGenerator::class);
-		$this->l10n = $this->createMock(IL10N::class);
+		$this->l10n = $this->createMock(IFactory::class);
+
+		$this->l10n->method('get')
+			->with('lib', '')
+			->willReturn($this->createMock(IL10N::class));
 
 		$this->emailTemplate = new EMailTemplate(
 			$this->defaults,

tests/lib/Mail/MailerTest.php

@@ -126,7 +126,7 @@ public function testCreateMessage() {
 		$this->assertInstanceOf('\OC\Mail\Message', $this->mailer->createMessage());
 	}
 
-	
+
 	public function testSendInvalidMailException() {
 		$this->expectException(\Exception::class);