<?php
/**
 * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace Test\Files\Node;

use OC\Files\Node\Root;
use OC\Files\Storage\Temporary;
use OC\Files\View;
use OC\Memcache\ArrayCache;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\Files\Config\IUserMountCache;
use OCP\Files\Mount\IMountManager;
use OCP\ICacheFactory;
use OCP\IUserManager;
use OCP\Server;
use Psr\Log\LoggerInterface;
use Test\Traits\UserTrait;

/**
 * Class IntegrationTest
 *
 * @group DB
 *
 * @package Test\Files\Node
 */
class IntegrationTest extends \Test\TestCase {
	use UserTrait;

	/**
	 * @var \OC\Files\Node\Root $root
	 */
	private $root;

	/**
	 * @var \OC\Files\Storage\Storage[]
	 */
	private $storages;

	/**
	 * @var \OC\Files\View $view
	 */
	private $view;

	protected function setUp(): void {
		parent::setUp();

		$manager = Server::get(IMountManager::class);

		\OC_Hook::clear('OC_Filesystem');

		$user = $this->createUser($this->getUniqueID('user'), '');
		$this->loginAsUser($user->getUID());
		$cacheFactory = $this->createMock(ICacheFactory::class);
		$cacheFactory->method('createLocal')
			->willReturnCallback(function () {
				return new ArrayCache();
			});

		$this->view = new View();
		$this->root = new Root(
			$manager,
			$this->view,
			$user,
			Server::get(IUserMountCache::class),
			$this->createMock(LoggerInterface::class),
			$this->createMock(IUserManager::class),
			$this->createMock(IEventDispatcher::class),
			$cacheFactory,
		);
		$storage = new Temporary([]);
		$subStorage = new Temporary([]);
		$this->storages[] = $storage;
		$this->storages[] = $subStorage;
		$this->root->mount($storage, '/');
		$this->root->mount($subStorage, '/substorage/');
		$manager->removeMount('/' . $user->getUID());
	}

	protected function tearDown(): void {
		foreach ($this->storages as $storage) {
			$storage->getCache()->clear();
		}

		$this->logout();
		parent::tearDown();
	}

	public function testBasicFile(): void {
		$file = $this->root->newFile('/foo.txt');
		$this->assertCount(2, $this->root->getDirectoryListing());
		$this->assertTrue($this->root->nodeExists('/foo.txt'));
		$id = $file->getId();
		$this->assertInstanceOf('\OC\Files\Node\File', $file);
		$file->putContent('qwerty');
		$this->assertEquals('text/plain', $file->getMimeType());
		$this->assertEquals('qwerty', $file->getContent());
		$this->assertFalse($this->root->nodeExists('/bar.txt'));
		$target = $file->move('/bar.txt');
		$this->assertEquals($id, $target->getId());
		$this->assertEquals($id, $file->getId());
		$this->assertFalse($this->root->nodeExists('/foo.txt'));
		$this->assertTrue($this->root->nodeExists('/bar.txt'));
		$this->assertEquals('bar.txt', $file->getName());
		$this->assertEquals('bar.txt', $file->getInternalPath());

		$file->move('/substorage/bar.txt');
		$this->assertEquals($id, $file->getId());
		$this->assertEquals('qwerty', $file->getContent());
	}

	public function testBasicFolder(): void {
		$folder = $this->root->newFolder('/foo');
		$this->assertTrue($this->root->nodeExists('/foo'));
		$file = $folder->newFile('/bar');
		$this->assertTrue($this->root->nodeExists('/foo/bar'));
		$file->putContent('qwerty');

		$listing = $folder->getDirectoryListing();
		$this->assertEquals(1, count($listing));
		$this->assertEquals($file->getId(), $listing[0]->getId());
		$this->assertEquals($file->getStorage(), $listing[0]->getStorage());


		$rootListing = $this->root->getDirectoryListing();
		$this->assertEquals(2, count($rootListing));

		$folder->move('/asd');
		/**
		 * @var \OC\Files\Node\File $file
		 */
		$file = $folder->get('/bar');
		$this->assertInstanceOf('\OC\Files\Node\File', $file);
		$this->assertFalse($this->root->nodeExists('/foo/bar'));
		$this->assertTrue($this->root->nodeExists('/asd/bar'));
		$this->assertEquals('qwerty', $file->getContent());
		$folder->move('/substorage/foo');
		/**
		 * @var \OC\Files\Node\File $file
		 */
		$file = $folder->get('/bar');
		$this->assertInstanceOf('\OC\Files\Node\File', $file);
		$this->assertTrue($this->root->nodeExists('/substorage/foo/bar'));
		$this->assertEquals('qwerty', $file->getContent());
	}
}
re/eventbus</option>
<option value='feature/karaf-feature-file'>feature/karaf-feature-file</option>
<option value='feature/nullrepresentation'>feature/nullrepresentation</option>
<option value='feature/standard-gwt'>feature/standard-gwt</option>
<option value='feature/standard-sass'>feature/standard-sass</option>
<option value='feature/vaadin8'>feature/vaadin8</option>
<option value='feature/vaadin8-book'>feature/vaadin8-book</option>
<option value='feature/vaadin8-book-vol2'>feature/vaadin8-book-vol2</option>
<option value='feature/vaadin8-sass-valo-only'>feature/vaadin8-sass-valo-only</option>
<option value='fileToFilesReplacement'>fileToFilesReplacement</option>
<option value='fix11576'>fix11576</option>
<option value='fix_event_router_prototype'>fix_event_router_prototype</option>
<option value='grid'>grid</option>
<option value='grid_dnd_autoscroller'>grid_dnd_autoscroller</option>
<option value='grid_dragger'>grid_dragger</option>
<option value='issue/8307_select_using_collection'>issue/8307_select_using_collection</option>
<option value='master'>master</option>
<option value='mobile_drag_image_offset'>mobile_drag_image_offset</option>
<option value='pr/11306'>pr/11306</option>
<option value='remote-run/flow-atmosphere-test'>remote-run/flow-atmosphere-test</option>
<option value='snapshot/7.5'>snapshot/7.5</option>
<option value='snapshot/7.6'>snapshot/7.6</option>
<option value='tmattsso-patch-1'>tmattsso-patch-1</option>
<option value='update-minor-deps'>update-minor-deps</option>
<option value='vaadin-icons-3.0.1'>vaadin-icons-3.0.1</option>
<option value='wip-date-time-datatype'>wip-date-time-datatype</option>
<option value='wip-java-10-compat'>wip-java-10-compat</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Vaadin 6, 7, 8 is a Java framework for modern Java web applications: https://github.com/vaadin/framework</td><td class='sub right'>www-data</td></tr></table>
<table class='tabs'><tr><td>
<a href='/vaadin-framework.git/about/?h=8.6.0.beta1'>about</a><a href='/vaadin-framework.git/?h=8.6.0.beta1'>summary</a><a href='/vaadin-framework.git/refs/?h=8.6.0.beta1'>refs</a><a href='/vaadin-framework.git/log/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>log</a><a class='active' href='/vaadin-framework.git/tree/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>tree</a><a href='/vaadin-framework.git/commit/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>commit</a><a href='/vaadin-framework.git/diff/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>diff</a><a href='/vaadin-framework.git/stats/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>stats</a></td><td class='form'><form class='right' method='get' action='/vaadin-framework.git/log/documentation/articles/AccessControlForViews.asciidoc'>
<input type='hidden' name='h' value='8.6.0.beta1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/vaadin-framework.git/tree/?h=8.6.0.beta1'>root</a>/<a href='/vaadin-framework.git/tree/documentation?h=8.6.0.beta1'>documentation</a>/<a href='/vaadin-framework.git/tree/documentation/articles?h=8.6.0.beta1'>articles</a>/<a href='/vaadin-framework.git/tree/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>AccessControlForViews.asciidoc</a></div><div class='content'>blob: b97de78a30fefdeb51a7348c22d9de760dfa86a6 (<a href='/vaadin-framework.git/plain/documentation/articles/AccessControlForViews.asciidoc?h=8.6.0.beta1'>plain</a>)
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</pre></td>
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.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
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.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
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.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span>---
title: Access Control For Views
order: 2
layout: page
---

[[access-control-for-views]]
= Access control for views

The Navigator API provides a simple mechanism to allow or disallow
navigating to a View. Before a View is shown, each ViewChangeListener
that is registered with the Navigator is given the opportunity to veto
the View change.

One can also make the View itself trigger a navigation to another View
in navigateTo(), but let&#39;s take a look at the more flexible
beforeViewChange() and afterViewChange(), that exists specifically for
this purpose.

First, let&#39;s continue from previous examples and create a MessageView
for secret messages:

[source,java]
....
import com.vaadin.navigator.View;
import com.vaadin.ui.Label;

public class SecretView extends MessageView implements View {
  public static final String NAME = &quot;secret&quot;;

  public SecretView() {
    setCaption(&quot;Private messages&quot;);
    ((Layout) getContent()).addComponent(new Label(&quot;Some private stuff.&quot;));
  }
}
....

As you can see, there is absolutely nothing special going on here, we
just customize the View enough to be able to distinguish from the
regular MessageView.

Next, we&#39;ll register this new View with the Navigator, exactly as
before. At this point our SecretView is not secret at all, but let&#39;s fix
that by adding a ViewChangeListener to the Navigator:

[source,java]
....
navigator.addViewChangeListener(new ViewChangeListener() {

  @Override
  public boolean beforeViewChange(ViewChangeEvent event) {
    if (event.getNewView() instanceof SecretView &amp;&amp;
    ((NavigationtestUI)UI.getCurrent()).getLoggedInUser() == null) {
      Notification.show(&quot;Permission denied&quot;, Type.ERROR_MESSAGE);
      return false;
    } else {
      return true;
    }
  }

  @Override
  public void afterViewChange(ViewChangeEvent event) {
  }

});
....

So if we&#39;re on our way to the SecretView, but not logged in
(getLoggedInUser() == null), the View change is cancelled. Quite simple
rules in our case, but you could check anything - most probably you&#39;ll
want to call a helper method that checks the user for permission.

Let&#39;s go ahead and add some links to the MainView again, so that we
don&#39;t have to muck with the address-bar to try it out:

[source,java]
....
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.server.ExternalResource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Link;
import com.vaadin.ui.Panel;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

public class MainView extends Panel implements View {

    public static final String NAME = &quot;&quot;;

    public MainView() {

        VerticalLayout layout = new VerticalLayout();

        Link lnk = new Link(&quot;Count&quot;, new ExternalResource(&quot;#!&quot; + CountView.NAME));
        layout.addComponent(lnk);

        lnk = new Link(&quot;Message: Hello&quot;, new ExternalResource(&quot;#!&quot;
                + MessageView.NAME + &quot;/Hello&quot;));
        layout.addComponent(lnk);

        lnk = new Link(&quot;Message: Bye&quot;, new ExternalResource(&quot;#!&quot;
                + MessageView.NAME + &quot;/Bye/Goodbye&quot;));
        layout.addComponent(lnk);

        lnk = new Link(&quot;Private message: Secret&quot;, new ExternalResource(&quot;#!&quot;
                + SecretView.NAME + &quot;/Secret&quot;));
        layout.addComponent(lnk);

        lnk = new Link(&quot;Private message: Topsecret&quot;, new ExternalResource(&quot;#!&quot;
                + SecretView.NAME + &quot;/Topsecret&quot;));
        layout.addComponent(lnk);

        // login/logout toggle so we can test this
        Button logInOut = new Button(&quot;Toggle login&quot;,
                new Button.ClickListener() {
                    public void buttonClick(ClickEvent event) {
                        Object user = ((NavigationtestUI)UI.getCurrent()).getLoggedInUser();
                        ((NavigationtestUI)UI.getCurrent()).setLoggedInUser(
                                user == null ? &quot;Smee&quot; : null);
                    }
                });
        layout.addComponent(logInOut);
        setContent(layout);
    }

    @Override
    public void enter(ViewChangeEvent event) {
    }
}
....

Instead of just showing a notification and leaving the user wondering,
we should obviously allow the user to log in and continue. We&#39;ll do just
that in the separate tutorial about Handling login, but for now we just
add a button that toggles our logged in/out state.

Meanwhile, here is the the full source for the UI so far:

[source,java]
....
import com.vaadin.navigator.Navigator;
import com.vaadin.navigator.ViewChangeListener;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.UI;

public class NavigationtestUI extends UI {

    Navigator navigator;

    String loggedInUser;

    @Override
    public void init(VaadinRequest request) {
        // Create Navigator, make it control the ViewDisplay
        navigator = new Navigator(this, this);

        // Add some Views
        navigator.addView(MainView.NAME, new MainView()); // no fragment

        // #count will be a new instance each time we navigate to it, counts:
        navigator.addView(CountView.NAME, CountView.class);

        // #message adds a label with whatever it receives as a parameter
        navigator.addView(MessageView.NAME, new MessageView());

        // #secret works as #message, but you need to be logged in
        navigator.addView(SecretView.NAME, new SecretView());

        // we&#39;ll handle permissions with a listener here, you could also do
        // that in the View itself.

        navigator.addViewChangeListener(new ViewChangeListener() {

            @Override
            public boolean beforeViewChange(ViewChangeEvent event) {
                if (event.getNewView() instanceof SecretView
                        &amp;&amp; ((NavigationtestUI)UI.getCurrent()).getLoggedInUser() == null) {
                    Notification.show(&quot;Permission denied&quot;, Type.ERROR_MESSAGE);
                    return false;
                } else {
                    return true;
                }
            }

            @Override
            public void afterViewChange(ViewChangeEvent event) {
                System.out.println(&quot;After view change&quot;);
            }

        });
    }

    public String getLoggedInUser(){
         return loggedInUser;
    }

    public void setLoggedInUser(String user){
         loggedInUser = user;
   }
}
....
</pre></div>
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