Hooks

Hooks are used to execute code before or after an event has occurred. This is for instance useful to run cleanup code after users, groups or files have been deleted. Hooks should be registered in the app.php:

<?php
namespace OCA\MyApp\AppInfo;

$app = new Application();
$app->getContainer()->query('UserHooks')->register();

The hook logic should be in a separate class that is being registered in the Container:

<?php
namespace OCA\MyApp\AppInfo;

use \OCP\AppFramework\App;

use \OCA\MyApp\Hooks\UserHooks;


class Application extends App {

    public function __construct(array $urlParams=array()){
        parent::__construct('myapp', $urlParams);

        $container = $this->getContainer();

        /**
         * Controllers
         */
        $container->registerService('UserHooks', function($c) {
            return new UserHooks(
                $c->query('ServerContainer')->getUserManager()
            );
        });
    }
}

<?php
namespace OCA\MyApp\Hooks;
use OCP\IUserManager;

class UserHooks {

    private $userManager;

    public function __construct(IUserManager $userManager){
        $this->userManager = $userManager;
    }

    public function register() {
        $callback = function($user) {
            // your code that executes before $user is deleted
        };
        $this->userManager->listen('\OC\User', 'preDelete', $callback);
    }

}

Available hooks

The scope is the first parameter that is passed to the listen method, the second parameter is the method and the third one the callback that should be executed once the hook is being called, e.g.:

<?php

// listen on user predelete
$callback = function($user) {
    // your code that executes before $user is deleted
};
$userManager->listen('\OC\User', 'preDelete', $callback);

Hooks can also be removed by using the removeListener method on the object:

<?php

// delete previous callback
$userManager->removeListener(null, null, $callback);

The following hooks are available:

Session

Injectable from the ServerContainer by calling the method getUserSession().

Hooks available in scope \OC\User:

• preSetPassword (\OC\User\User $user, string $password, string $recoverPassword)
• postSetPassword (\OC\User\User $user, string $password, string $recoverPassword)
• changeUser (\OC\User\User $user, string $feature, string $value)
• preDelete (\OC\User\User $user)
• postDelete (\OC\User\User $user)
• preCreateUser (string $uid, string $password)
• postCreateUser (\OC\User\User $user)
• preLogin (string $user, string $password)
• postLogin (\OC\User\User $user, string $password)
• logout ()

UserManager

Injectable from the ServerContainer by calling the method getUserManager().

Hooks available in scope \OC\User:

• preSetPassword (\OC\User\User $user, string $password, string $recoverPassword)
• postSetPassword (\OC\User\User $user, string $password, string $recoverPassword)
• preDelete (\OC\User\User $user)
• postDelete (\OC\User\User $user)
• preCreateUser (string $uid, string $password)
• postCreateUser (\OC\User\User $user, string $password)

GroupManager

Hooks available in scope \OC\Group:

• preAddUser (\OC\Group\Group $group, \OC\User\User $user)
• postAddUser (\OC\Group\Group $group, \OC\User\User $user)
• preRemoveUser (\OC\Group\Group $group, \OC\User\User $user)
• postRemoveUser (\OC\Group\Group $group, \OC\User\User $user)
• preDelete (\OC\Group\Group $group)
• postDelete (\OC\Group\Group $group)
• preCreate (string $groupId)
• postCreate (\OC\Group\Group $group)

Filesystem root

Injectable from the ServerContainer by calling the method getRootFolder(), getUserFolder() or getAppFolder().

Filesystem hooks available in scope \OC\Files:

• preWrite (\OCP\Files\Node $node)
• postWrite (\OCP\Files\Node $node)
• preCreate (\OCP\Files\Node $node)
• postCreate (\OCP\Files\Node $node)
• preDelete (\OCP\Files\Node $node)
• postDelete (\OCP\Files\Node $node)
• preTouch (\OCP\Files\Node $node, int $mtime)
• postTouch (\OCP\Files\Node $node)
• preCopy (\OCP\Files\Node $source, \OCP\Files\Node $target)
• postCopy (\OCP\Files\Node $source, \OCP\Files\Node $target)
• preRename (\OCP\Files\Node $source, \OCP\Files\Node $target)
• postRename (\OCP\Files\Node $source, \OCP\Files\Node $target)

Filesystem scanner

Filesystem scanner hooks available in scope \OC\Files\Utils\Scanner:

• scanFile (string $absolutePath)
• scanFolder (string $absolutePath)
• postScanFile (string $absolutePath)
• postScanFolder (string $absolutePath)