Move public auth page over

Now this is in core so the basics (that 99% of the app will want to
use) looks always the same.

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

apps/files_sharing/lib/Controller/ShareController.php

@@ -171,23 +171,6 @@ class ShareController extends AuthPublicShareController {
 		$this->session->set('public_link_authenticated', (string)$this->share->getId());
 	}
 
-	/**
-	 * @PublicPage
-	 * @NoCSRFRequired
-	 *
-	 * @return TemplateResponse
-	 */
-	public function showAuthenticate(): TemplateResponse {
-		return new TemplateResponse($this->appName, 'authenticate', array(), 'guest');
-	}
-
-	/**
-	 * @return TemplateResponse
-	 */
-	public function showAuthFailed(): TemplateResponse {
-		return new TemplateResponse($this->appName, 'authenticate', array('wrongpw' => true), 'guest');
-	}
-
 	/**
 	 * Authenticate a link item with the given password.
 	 * Or use the session if no password is provided.

core/templates/publicshareauth.php

@@ -2,8 +2,8 @@
 	/** @var $_ array */
 	/** @var $l \OCP\IL10N */
 	style('core', 'guest');
-	style('files_sharing', 'authenticate');
-	script('files_sharing', 'authenticate'); 
+	style('core', 'publicshareauth');
+	script('core', 'publicshareauth');
 ?>
 <form method="post">
 	<fieldset class="warning">

lib/public/AppFramework/AuthPublicShareController.php

@@ -26,7 +26,6 @@ namespace OCP\AppFramework;
 
 use OCP\AppFramework\Http\RedirectResponse;
 use OCP\AppFramework\Http\TemplateResponse;
-use OCP\Files\NotFoundException;
 use OCP\IRequest;
 use OCP\ISession;
 use OCP\IURLGenerator;
@@ -68,14 +67,18 @@ abstract class AuthPublicShareController extends PublicShareController {
 	 *
 	 * @since 14.0.0
 	 */
-	abstract public function showAuthenticate(): TemplateResponse;
+	public function showAuthenticate(): TemplateResponse {
+		return new TemplateResponse('core', 'publicshareauth', [], 'guest');
+	}
 
 	/**
 	 * The template to show when authentication failed
 	 *
 	 * @since 14.0.0
 	 */
-	abstract protected function showAuthFailed(): TemplateResponse;
+	protected function showAuthFailed(): TemplateResponse {
+		return new TemplateResponse('core', 'publicshareauth', ['wrongpw' => true], 'guest');
+	}
 
 	/**
 	 * Verify the password