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<?php |
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/** |
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* @copyright Copyright (c) 2016, ownCloud, Inc. |
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* |
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* @author Bart Visscher <[email protected]> |
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* @author Björn Schießle <[email protected]> |
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* @author Jörn Friedrich Dreyer <[email protected]> |
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* @author Morris Jobke <[email protected]> |
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* @author Robin Appelman <[email protected]> |
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* @author Robin McCorkell <[email protected]> |
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* @author Sam Tuke <[email protected]> |
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* @author Vincent Petry <[email protected]> |
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* |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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/** |
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* This class contains all hooks. |
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*/ |
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namespace OCA\Files_Versions; |
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class Hooks { |
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public static function connectHooks() { |
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// Listen to write signals |
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\OCP\Util::connectHook('OC_Filesystem', 'write', 'OCA\Files_Versions\Hooks', 'write_hook'); |
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// Listen to delete and rename signals |
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\OCP\Util::connectHook('OC_Filesystem', 'post_delete', 'OCA\Files_Versions\Hooks', 'remove_hook'); |
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\OCP\Util::connectHook('OC_Filesystem', 'delete', 'OCA\Files_Versions\Hooks', 'pre_remove_hook'); |
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\OCP\Util::connectHook('OC_Filesystem', 'post_rename', 'OCA\Files_Versions\Hooks', 'rename_hook'); |
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\OCP\Util::connectHook('OC_Filesystem', 'post_copy', 'OCA\Files_Versions\Hooks', 'copy_hook'); |
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\OCP\Util::connectHook('OC_Filesystem', 'rename', 'OCA\Files_Versions\Hooks', 'pre_renameOrCopy_hook'); |
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\OCP\Util::connectHook('OC_Filesystem', 'copy', 'OCA\Files_Versions\Hooks', 'pre_renameOrCopy_hook'); |
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$eventDispatcher = \OC::$server->getEventDispatcher(); |
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$eventDispatcher->addListener('OCA\Files::loadAdditionalScripts', ['OCA\Files_Versions\Hooks', 'onLoadFilesAppScripts']); |
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} |
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/** |
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* listen to write event. |
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*/ |
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public static function write_hook( $params ) { |
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$path = $params[\OC\Files\Filesystem::signal_param_path]; |
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if($path !== '') { |
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Storage::store($path); |
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} |
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} |
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/** |
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* Erase versions of deleted file |
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* @param array $params |
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* |
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* This function is connected to the delete signal of OC_Filesystem |
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* cleanup the versions directory if the actual file gets deleted |
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*/ |
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public static function remove_hook($params) { |
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$path = $params[\OC\Files\Filesystem::signal_param_path]; |
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if($path !== '') { |
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Storage::delete($path); |
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} |
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} |
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/** |
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* mark file as "deleted" so that we can clean up the versions if the file is gone |
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* @param array $params |
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*/ |
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public static function pre_remove_hook($params) { |
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$path = $params[\OC\Files\Filesystem::signal_param_path]; |
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if($path !== '') { |
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Storage::markDeletedFile($path); |
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} |
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} |
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/** |
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* rename/move versions of renamed/moved files |
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* @param array $params array with oldpath and newpath |
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* |
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* This function is connected to the rename signal of OC_Filesystem and adjust the name and location |
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* of the stored versions along the actual file |
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*/ |
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View Code Duplication |
public static function rename_hook($params) { |
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$oldpath = $params['oldpath']; |
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$newpath = $params['newpath']; |
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if($oldpath !== '' && $newpath !== '') { |
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Storage::renameOrCopy($oldpath, $newpath, 'rename'); |
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} |
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} |
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/** |
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* copy versions of copied files |
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* @param array $params array with oldpath and newpath |
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* |
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* This function is connected to the copy signal of OC_Filesystem and copies the |
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* the stored versions to the new location |
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*/ |
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View Code Duplication |
public static function copy_hook($params) { |
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$oldpath = $params['oldpath']; |
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$newpath = $params['newpath']; |
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if($oldpath !== '' && $newpath !== '') { |
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Storage::renameOrCopy($oldpath, $newpath, 'copy'); |
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} |
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} |
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/** |
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* Remember owner and the owner path of the source file. |
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* If the file already exists, then it was a upload of a existing file |
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* over the web interface and we call Storage::store() directly |
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* |
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* @param array $params array with oldpath and newpath |
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* |
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*/ |
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public static function pre_renameOrCopy_hook($params) { |
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// if we rename a movable mount point, then the versions don't have |
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// to be renamed |
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$absOldPath = \OC\Files\Filesystem::normalizePath('/' . \OCP\User::getUser() . '/files' . $params['oldpath']); |
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$manager = \OC\Files\Filesystem::getMountManager(); |
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$mount = $manager->find($absOldPath); |
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$internalPath = $mount->getInternalPath($absOldPath); |
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if ($internalPath === '' and $mount instanceof \OC\Files\Mount\MoveableMount) { |
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return; |
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} |
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$view = new \OC\Files\View(\OCP\User::getUser() . '/files'); |
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if ($view->file_exists($params['newpath'])) { |
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Storage::store($params['newpath']); |
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} else { |
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Storage::setSourcePathAndUser($params['oldpath']); |
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} |
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} |
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/** |
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* Load additional scripts when the files app is visible |
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*/ |
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public static function onLoadFilesAppScripts() { |
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\OCP\Util::addScript('files_versions', 'merged'); |
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} |
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} |
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nextcloud /
server
PHP has two types of connecting operators (logical operators, and boolean operators):
and&&or||The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&, or||.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
dieintroduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrowat this point:These limitations lead to logical operators rarely being of use in current PHP code.