PermissionHandler.php
Same filename in other branches
Namespace
Drupal\userFile
-
core/
modules/ user/ src/ PermissionHandler.php
View source
<?php
namespace Drupal\user;
use Drupal\Core\Discovery\YamlDiscovery;
use Drupal\Core\Controller\ControllerResolverInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslationInterface;
/**
* Provides the available permissions based on yml files.
*
* To define permissions you can use a $module.permissions.yml file. This file
* defines machine names, human-readable names, restrict access (if required for
* security warning), and optionally descriptions for each permission type. The
* machine names are the canonical way to refer to permissions for access
* checking.
*
* If your module needs to define dynamic permissions you can use the
* permission_callbacks key to declare a callable that will return an array of
* permissions, keyed by machine name. Each item in the array can contain the
* same keys as an entry in $module.permissions.yml.
*
* Here is an example from the core filter module (comments have been added):
* @code
* # The key is the permission machine name, and is required.
* administer filters:
* # (required) Human readable name of the permission used in the UI.
* title: 'Administer text formats and filters'
* # (optional) Additional description fo the permission used in the UI.
* description: 'Define how text is handled by combining filters into text formats.'
* # (optional) Boolean, when set to true a warning about site security will
* # be displayed on the Permissions page. Defaults to false.
* restrict access: false
*
* # An array of callables used to generate dynamic permissions.
* permission_callbacks:
* # The callable should return an associative array with one or more
* # permissions. Each permission array can use the same keys as the example
* # permission defined above. Additionally, a dependencies key is supported.
* # For more information about permission dependencies see
* # PermissionHandlerInterface::getPermissions().
* - Drupal\filter\FilterPermissions::permissions
* @endcode
*
* @see \Drupal\user\PermissionHandlerInterface::getPermissions()
* @see filter.permissions.yml
* @see \Drupal\filter\FilterPermissions
* @see user_api
*/
class PermissionHandler implements PermissionHandlerInterface {
use StringTranslationTrait;
/**
* The module handler.
*
* @var \Drupal\Core\Extension\ModuleHandlerInterface
*/
protected $moduleHandler;
/**
* The YAML discovery class to find all .permissions.yml files.
*
* @var \Drupal\Core\Discovery\YamlDiscovery
*/
protected $yamlDiscovery;
/**
* The controller resolver.
*
* @var \Drupal\Core\Controller\ControllerResolverInterface
*/
protected $controllerResolver;
/**
* Constructs a new PermissionHandler.
*
* @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
* The module handler.
* @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
* The string translation.
* @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
* The controller resolver.
*/
public function __construct(ModuleHandlerInterface $module_handler, TranslationInterface $string_translation, ControllerResolverInterface $controller_resolver) {
// @todo It would be nice if you could pull all module directories from the
// container.
$this->moduleHandler = $module_handler;
$this->stringTranslation = $string_translation;
$this->controllerResolver = $controller_resolver;
}
/**
* Gets the YAML discovery.
*
* @return \Drupal\Core\Discovery\YamlDiscovery
* The YAML discovery.
*/
protected function getYamlDiscovery() {
if (!isset($this->yamlDiscovery)) {
$this->yamlDiscovery = new YamlDiscovery('permissions', $this->moduleHandler
->getModuleDirectories());
}
return $this->yamlDiscovery;
}
/**
* {@inheritdoc}
*/
public function getPermissions() {
$all_permissions = $this->buildPermissionsYaml();
return $this->sortPermissions($all_permissions);
}
/**
* {@inheritdoc}
*/
public function moduleProvidesPermissions($module_name) {
// @TODO Static cache this information, see
// https://www.drupal.org/node/2339487
$permissions = $this->getPermissions();
foreach ($permissions as $permission) {
if ($permission['provider'] == $module_name) {
return TRUE;
}
}
return FALSE;
}
/**
* Builds all permissions provided by .permissions.yml files.
*
* @return array[]
* An array with the same structure as
* PermissionHandlerInterface::getPermissions().
*
* @see \Drupal\user\PermissionHandlerInterface::getPermissions()
*/
protected function buildPermissionsYaml() {
$all_permissions = [];
$all_callback_permissions = [];
foreach ($this->getYamlDiscovery()
->findAll() as $provider => $permissions) {
// The top-level 'permissions_callback' is a list of methods in controller
// syntax, see \Drupal\Core\Controller\ControllerResolver. These methods
// should return an array of permissions in the same structure.
if (isset($permissions['permission_callbacks'])) {
foreach ($permissions['permission_callbacks'] as $permission_callback) {
$callback = $this->controllerResolver
->getControllerFromDefinition($permission_callback);
if ($callback_permissions = call_user_func($callback)) {
// Add any callback permissions to the array of permissions. Any
// defaults can then get processed below.
foreach ($callback_permissions as $name => $callback_permission) {
if (!is_array($callback_permission)) {
$callback_permission = [
'title' => $callback_permission,
];
}
$callback_permission += [
'description' => NULL,
'provider' => $provider,
];
$all_callback_permissions[$name] = $callback_permission;
}
}
}
unset($permissions['permission_callbacks']);
}
foreach ($permissions as &$permission) {
if (!is_array($permission)) {
$permission = [
'title' => $permission,
];
}
$permission['title'] = $this->t($permission['title']);
$permission['description'] = isset($permission['description']) ? $this->t($permission['description']) : NULL;
$permission['provider'] = !empty($permission['provider']) ? $permission['provider'] : $provider;
}
$all_permissions += $permissions;
}
return $all_permissions + $all_callback_permissions;
}
/**
* Sorts the given permissions by provider name and title.
*
* @param array $all_permissions
* The permissions to be sorted.
*
* @return array[]
* An array with the same structure as
* PermissionHandlerInterface::getPermissions().
*
* @see \Drupal\user\PermissionHandlerInterface::getPermissions()
*/
protected function sortPermissions(array $all_permissions = []) {
// Get a list of all the modules providing permissions and sort by
// display name.
$modules = $this->getModuleNames();
uasort($all_permissions, function (array $permission_a, array $permission_b) use ($modules) {
if ($modules[$permission_a['provider']] == $modules[$permission_b['provider']]) {
return $permission_a['title'] <=> $permission_b['title'];
}
else {
return $modules[$permission_a['provider']] <=> $modules[$permission_b['provider']];
}
});
return $all_permissions;
}
/**
* Returns all module names.
*
* @return string[]
* Returns the human readable names of all modules keyed by machine name.
*/
protected function getModuleNames() {
$modules = [];
foreach (array_keys($this->moduleHandler
->getModuleList()) as $module) {
$modules[$module] = $this->moduleHandler
->getName($module);
}
asort($modules);
return $modules;
}
}
Classes
Title | Deprecated | Summary |
---|---|---|
PermissionHandler | Provides the available permissions based on yml files. |
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