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<?php
namespace Spatie\Permission;
use Illuminate\Cache\CacheManager;
use Illuminate\Contracts\Auth\Access\Authorizable;
use Illuminate\Contracts\Auth\Access\Gate;
use Illuminate\Contracts\Cache\Repository;
use Illuminate\Contracts\Cache\Store;
use Illuminate\Database\Eloquent\Collection;
use Spatie\Permission\Contracts\Permission;
use Spatie\Permission\Contracts\Role;
class PermissionRegistrar
{
/** @var \Illuminate\Contracts\Cache\Repository */
protected $cache;
/** @var \Illuminate\Cache\CacheManager */
protected $cacheManager;
/** @var string */
protected $permissionClass;
/** @var string */
protected $roleClass;
/** @var \Illuminate\Database\Eloquent\Collection */
protected $permissions;
/** @var string */
public static $pivotRole;
/** @var string */
public static $pivotPermission;
/** @var \DateInterval|int */
public static $cacheExpirationTime;
/** @var bool */
public static $teams;
/** @var string */
public static $teamsKey;
/** @var int|string */
protected $teamId = null;
/** @var string */
public static $cacheKey;
/** @var array */
private $cachedRoles = [];
/** @var array */
private $alias = [];
/** @var array */
private $except = [];
/**
* PermissionRegistrar constructor.
*/
public function __construct(CacheManager $cacheManager)
{
$this->permissionClass = config('permission.models.permission');
$this->roleClass = config('permission.models.role');
$this->cacheManager = $cacheManager;
$this->initializeCache();
}
public function initializeCache()
{
self::$cacheExpirationTime = config('permission.cache.expiration_time') ?: \DateInterval::createFromDateString('24 hours');
self::$teams = config('permission.teams', false);
self::$teamsKey = config('permission.column_names.team_foreign_key');
self::$cacheKey = config('permission.cache.key');
self::$pivotRole = config('permission.column_names.role_pivot_key') ?: 'role_id';
self::$pivotPermission = config('permission.column_names.permission_pivot_key') ?: 'permission_id';
$this->cache = $this->getCacheStoreFromConfig();
}
protected function getCacheStoreFromConfig(): Repository
{
// the 'default' fallback here is from the permission.php config file,
// where 'default' means to use config(cache.default)
$cacheDriver = config('permission.cache.store', 'default');
// when 'default' is specified, no action is required since we already have the default instance
if ($cacheDriver === 'default') {
return $this->cacheManager->store();
}
// if an undefined cache store is specified, fallback to 'array' which is Laravel's closest equiv to 'none'
if (! \array_key_exists($cacheDriver, config('cache.stores'))) {
$cacheDriver = 'array';
}
return $this->cacheManager->store($cacheDriver);
}
/**
* Set the team id for teams/groups support, this id is used when querying permissions/roles
*
* @param int|string|\Illuminate\Database\Eloquent\Model $id
*/
public function setPermissionsTeamId($id)
{
if ($id instanceof \Illuminate\Database\Eloquent\Model) {
$id = $id->getKey();
}
$this->teamId = $id;
}
/**
* @return int|string
*/
public function getPermissionsTeamId()
{
return $this->teamId;
}
/**
* Register the permission check method on the gate.
* We resolve the Gate fresh here, for benefit of long-running instances.
*/
public function registerPermissions(): bool
{
app(Gate::class)->before(function (Authorizable $user, string $ability) {
if (method_exists($user, 'checkPermissionTo')) {
return $user->checkPermissionTo($ability) ?: null;
}
});
return true;
}
/**
* Flush the cache.
*/
public function forgetCachedPermissions()
{
$this->permissions = null;
return $this->cache->forget(self::$cacheKey);
}
/**
* Clear class permissions.
* This is only intended to be called by the PermissionServiceProvider on boot,
* so that long-running instances like Swoole don't keep old data in memory.
*/
public function clearClassPermissions()
{
$this->permissions = null;
}
/**
* Load permissions from cache
* This get cache and turns array into \Illuminate\Database\Eloquent\Collection
*/
private function loadPermissions()
{
if ($this->permissions) {
return;
}
$this->permissions = $this->cache->remember(self::$cacheKey, self::$cacheExpirationTime, function () {
return $this->getSerializedPermissionsForCache();
});
// fallback for old cache method, must be removed on next mayor version
if (! isset($this->permissions['alias'])) {
$this->forgetCachedPermissions();
$this->loadPermissions();
return;
}
$this->alias = $this->permissions['alias'];
$this->hydrateRolesCache();
$this->permissions = $this->getHydratedPermissionCollection();
$this->cachedRoles = $this->alias = $this->except = [];
}
/**
* Get the permissions based on the passed params.
*/
public function getPermissions(array $params = [], bool $onlyOne = false): Collection
{
$this->loadPermissions();
$method = $onlyOne ? 'first' : 'filter';
$permissions = $this->permissions->$method(static function ($permission) use ($params) {
foreach ($params as $attr => $value) {
if ($permission->getAttribute($attr) != $value) {
return false;
}
}
return true;
});
if ($onlyOne) {
$permissions = new Collection($permissions ? [$permissions] : []);
}
return $permissions;
}
/**
* Get an instance of the permission class.
*/
public function getPermissionClass(): Permission
{
return app($this->permissionClass);
}
public function setPermissionClass($permissionClass)
{
$this->permissionClass = $permissionClass;
config()->set('permission.models.permission', $permissionClass);
app()->bind(Permission::class, $permissionClass);
return $this;
}
/**
* Get an instance of the role class.
*/
public function getRoleClass(): Role
{
return app($this->roleClass);
}
public function setRoleClass($roleClass)
{
$this->roleClass = $roleClass;
config()->set('permission.models.role', $roleClass);
app()->bind(Role::class, $roleClass);
return $this;
}
public function getCacheRepository(): Repository
{
return $this->cache;
}
public function getCacheStore(): Store
{
return $this->cache->getStore();
}
protected function getPermissionsWithRoles(): Collection
{
return $this->getPermissionClass()->select()->with('roles')->get();
}
/**
* Changes array keys with alias
*/
private function aliasedArray($model): array
{
return collect(is_array($model) ? $model : $model->getAttributes())->except($this->except)
->keyBy(function ($value, $key) {
return $this->alias[$key] ?? $key;
})->all();
}
/**
* Array for cache alias
*/
private function aliasModelFields($newKeys = []): void
{
$i = 0;
$alphas = ! count($this->alias) ? range('a', 'h') : range('j', 'p');
foreach (array_keys($newKeys->getAttributes()) as $value) {
if (! isset($this->alias[$value])) {
$this->alias[$value] = $alphas[$i++] ?? $value;
}
}
$this->alias = array_diff_key($this->alias, array_flip($this->except));
}
/*
* Make the cache smaller using an array with only required fields
*/
private function getSerializedPermissionsForCache()
{
$this->except = config('permission.cache.column_names_except', ['created_at', 'updated_at', 'deleted_at']);
$permissions = $this->getPermissionsWithRoles()
->map(function ($permission) {
if (! $this->alias) {
$this->aliasModelFields($permission);
}
return $this->aliasedArray($permission) + $this->getSerializedRoleRelation($permission);
})->all();
$roles = array_values($this->cachedRoles);
$this->cachedRoles = [];
return ['alias' => array_flip($this->alias)] + compact('permissions', 'roles');
}
private function getSerializedRoleRelation($permission)
{
if (! $permission->roles->count()) {
return [];
}
if (! isset($this->alias['roles'])) {
$this->alias['roles'] = 'r';
$this->aliasModelFields($permission->roles[0]);
}
return [
'r' => $permission->roles->map(function ($role) {
if (! isset($this->cachedRoles[$role->getKey()])) {
$this->cachedRoles[$role->getKey()] = $this->aliasedArray($role);
}
return $role->getKey();
})->all(),
];
}
private function getHydratedPermissionCollection()
{
$permissionClass = $this->getPermissionClass();
$permissionInstance = new $permissionClass();
return Collection::make(
array_map(function ($item) use ($permissionInstance) {
return $permissionInstance
->newFromBuilder($this->aliasedArray(array_diff_key($item, ['r' => 0])))
->setRelation('roles', $this->getHydratedRoleCollection($item['r'] ?? []));
}, $this->permissions['permissions'])
);
}
private function getHydratedRoleCollection(array $roles)
{
return Collection::make(array_values(
array_intersect_key($this->cachedRoles, array_flip($roles))
));
}
private function hydrateRolesCache()
{
$roleClass = $this->getRoleClass();
$roleInstance = new $roleClass();
array_map(function ($item) use ($roleInstance) {
$role = $roleInstance->newFromBuilder($this->aliasedArray($item));
$this->cachedRoles[$role->getKey()] = $role;
}, $this->permissions['roles']);
$this->permissions['roles'] = [];
}
}
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