Api: Sharing listens to Vfs hooks to stay up-to-date with deleted or renamed files

api/setup/setup.inc.php

@@ -63,6 +63,11 @@ $setup_info['api']['hooks']['editgroup']      = 'EGroupware\\Api\\Vfs\\Hooks::ed
 $setup_info['api']['hooks']['changepassword'] = 'EGroupware\\Api\\Mail\\Hooks::changepassword';
 $setup_info['api']['hooks']['sidebox_all'] = 'EGroupware\\Api\\Framework\\Tutorial::tutorial_menu';
 
+// Hooks to delete shares when file is deleted
+$setup_info['api']['hooks']['vfs_unlink'] = 'EGroupware\\Api\\Vfs\\Sharing::vfsUpdate';
+$setup_info['api']['hooks']['vfs_rename'] = 'EGroupware\\Api\\Vfs\\Sharing::vfsUpdate';
+$setup_info['api']['hooks']['vfs_rmdir'] = 'EGroupware\\Api\\Vfs\\Sharing::vfsUpdate';
+
 // installation checks
 $setup_info['api']['check_install'] = array(
 		'' => array(

api/src/Vfs/Sharing.php

@@ -15,8 +15,6 @@ namespace EGroupware\Api\Vfs;
 
 use EGroupware\Api;
 use EGroupware\Api\Vfs;
-use EGroupware\Collabora\Wopi;
-
 use filemanager_ui;
 
 /**
@@ -398,6 +396,52 @@ class Sharing extends \EGroupware\Api\Sharing
 		return $actions;
 	}
 
+	/**
+	 * Hook callback to watch VFS and remove any shares for files that get moved or removed
+	 */
+	public static function vfsUpdate($data)
+	{
+		$path = $data['location'] == 'vfs_rename' ? $data['from'] : $data['path'];
+		if (parse_url($path, PHP_URL_SCHEME) !== 'vfs')
+		{
+			$path = Api\Vfs::PREFIX . ($path[0] == '/' ? '' : '/') . $path;
+		}
+		if ($data['location'] == 'vfs_rmdir')
+		{
+			// Normally removing a directory removes the files first, so any shares inside the directory would
+			// be handled already, but just in case, get it all.
+			$path .= '%';
+		}
+
+		$shares = array();
+		foreach ($GLOBALS['egw']->db->select(self::TABLE, array(
+				'share_id', 'share_path', 'share_owner'
+		),
+				array(
+						"share_path LIKE '$path'"
+				),
+				__LINE__, __FILE__, false) as $share)
+		{
+			$shares[] = $share;
+		}
+		foreach ($shares as $share)
+		{
+			if ($data['location'] == 'vfs_rename')
+			{
+				if (parse_url($data['to'], PHP_URL_SCHEME) !== 'vfs')
+				{
+					$data['to'] = $path = Api\Vfs::PREFIX . ($data['to'][0] == '/' ? '' : '/') . $data['to'];
+				}
+				$GLOBALS['egw']->db->update(self::TABLE, array(
+						'share_path' => $data['to']
+				), $share, __LINE__, __FILE__);
+			}
+			else
+			{
+				static::delete($share['share_id']);
+			}
+		}
+	}
 }
 
 if (file_exists(__DIR__.'/../../../filemanager/inc/class.filemanager_ui.inc.php'))

api/tests/Vfs/SharingBase.php

@@ -17,8 +17,8 @@ namespace EGroupware\Api\Vfs;
 require_once __DIR__ . '/../LoggedInTest.php';
 
 use EGroupware\Api;
-use EGroupware\Api\Vfs;
 use EGroupware\Api\LoggedInTest as LoggedInTest;
+use EGroupware\Api\Vfs;
 use EGroupware\Stylite\Vfs\Versioning;
 
 
@@ -421,6 +421,19 @@ class SharingBase extends LoggedInTest
 		return $share;
 	}
 
+	public function readShare($share_id)
+	{
+		foreach ($GLOBALS['egw']->db->select(Sharing::TABLE, '*',
+				array(
+						'share_id' => (int)$share_id
+				),
+				__LINE__, __FILE__, false) as $share)
+		{
+			return $share;
+		}
+		return array();
+	}
+
 	/**
 	 * Make an infolog entry
 	 */
@@ -429,7 +442,7 @@ class SharingBase extends LoggedInTest
 		$bo = new \infolog_bo();
 		$element = array(
 				'info_subject' => "Test infolog for #{$this->getName()}",
-			'info_des'     => 'Test element for ' . $this->getName() ."\n". Api\DateTime::to(),
+				'info_des' => 'Test element for ' . $this->getName() . "\n" . Api\DateTime::to(),
 				'info_status' => 'open'
 		);
 

api/tests/Vfs/SharingHooksTest.php

@@ -0,0 +1,108 @@
+<?php
+
+/**
+ * Tests for updating / deleting shares if underlying file is renamed or deleted
+ *
+ * We create files and delete them through the VFS, then check to see if the share is
+ * correctly deleted too.
+ *
+ * @link http://www.egroupware.org
+ * @author Nathan Gray
+ * @copyright (c) 2020  Nathan Gray
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ */
+
+namespace EGroupware\Api\Vfs;
+
+require_once __DIR__ . '/SharingBase.php';
+
+use EGroupware\Api\Vfs;
+
+
+class SharingHooksTest extends SharingBase
+{
+
+	/**
+	 * Test that deleting a file deletes the share
+	 */
+	public function testDeleteFileDeletesShare()
+	{
+		$target = Vfs::get_home_dir();
+
+		$this->files = $this->addFiles($target);
+		$test_file = $this->files[0];
+
+		// Make sure there are no leftover shares
+		Sharing::delete(array('share_path' => $test_file));
+
+		// Create share
+		$this->shares[] = $created_share = Sharing::create($test_file, Sharing::READONLY, '', '');
+
+		$this->assertEquals(Vfs::PREFIX . $test_file, $created_share['share_path']);
+
+		// Now delete the file
+		Vfs::remove($test_file);
+
+		// Check for share for that file
+		$read_share = $this->readShare($created_share['share_id']);
+
+		$this->assertEquals(array(), $read_share, "Expected not to find the share, but something was found");
+	}
+
+
+	/**
+	 * Test that deleting a directory deletes shares on any file in that directory
+	 */
+	public function testDeleteDirectoryDeletesShare()
+	{
+		$target = Vfs::get_home_dir();
+
+		$this->files = $this->addFiles($target);
+		$test_file = $target . '/sub_dir/subdir_test_file.txt';
+
+		// Make sure there are no leftover shares
+		Sharing::delete(array('share_path' => $test_file));
+
+		// Create share
+		$this->shares[] = $created_share = Sharing::create($test_file, Sharing::READONLY, '', '');
+
+		$this->assertEquals(Vfs::PREFIX . $test_file, $created_share['share_path']);
+
+		// Now delete the parent directory
+		Vfs::remove($target . '/sub_dir');
+
+		// Check for share for that file
+		$read_share = $this->readShare($created_share['share_id']);
+
+		$this->assertEquals(array(), $read_share, "Expected not to find the share, but something was found");
+	}
+
+	/**
+	 * Test renaming a file updates the share
+	 */
+	public function testRenameFileUpdatesShare()
+	{
+		$target = Vfs::get_home_dir();
+
+		$this->files = $this->addFiles($target);
+		$test_file = $this->files[0];
+
+		// Make sure there are no leftover shares
+		Sharing::delete(array('share_path' => $test_file));
+
+		// Create share
+		$this->shares[] = $created_share = Sharing::create($test_file, Sharing::READONLY, '', '');
+
+		$this->assertEquals(Vfs::PREFIX . $test_file, $created_share['share_path']);
+
+		// Now rename the file
+		$this->files[] = $moved = $target . '/moved.txt';
+		Vfs::rename($test_file, $moved);
+
+		// Check for share for that file
+		$read_share = $this->readShare($created_share['share_id']);
+
+		$this->assertEquals(Vfs::PREFIX . $moved, $read_share['share_path'], "Expected find the share with a different path");
+		$this->assertNotEquals(Vfs::PREFIX . $moved, $created_share['share_path'], "Expected find the share with a different path");
+	}
+}