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<?php |
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namespace JeroenNoten\LaravelAdminLte\Menu\Filters; |
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use Illuminate\Contracts\Auth\Access\Gate; |
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use JeroenNoten\LaravelAdminLte\Helpers\MenuItemHelper; |
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class GateFilter implements FilterInterface |
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{ |
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/** |
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* The Laravel gate instance, used to check for permissions. |
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* |
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* @var Gate |
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*/ |
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protected $gate; |
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/** |
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* Constructor. |
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* |
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* @param Gate $gate |
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*/ |
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public function __construct(Gate $gate) |
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{ |
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$this->gate = $gate; |
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} |
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/** |
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* Transforms a menu item. Add the restricted property to a menu item |
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* when situable. |
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* |
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* @param array $item A menu item |
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* @return array The transformed menu item |
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*/ |
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public function transform($item) |
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{ |
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// Set a special attribute when item is not allowed. Items with this |
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// attribute will be filtered out of the menu. |
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$isWholeRestrictedSubmenu = MenuItemHelper::isSubmenu($item) |
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&& $this->allItemsRestricted($item['submenu']); |
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if (! $this->isAllowed($item) || $isWholeRestrictedSubmenu) { |
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$item['restricted'] = true; |
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} |
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return $item; |
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} |
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/** |
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* Check if a menu item is allowed for the current user. |
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* |
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* @param array $item A menu item |
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* @return bool |
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*/ |
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protected function isAllowed($item) |
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{ |
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// Check if there are any permission defined for the item. |
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if (empty($item['can'])) { |
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return true; |
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} |
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// Read the extra arguments (a db model instance can be used). |
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$args = isset($item['model']) ? $item['model'] : []; |
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// Check if the current user can perform the configured permissions. |
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if (is_string($item['can']) || is_array($item['can'])) { |
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return $this->gate->any($item['can'], $args); |
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} |
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return true; |
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} |
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/** |
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* Check if a set of items are all restricted (or unallowed). |
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* |
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* @param array $items An array with the menu items to check |
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* @return bool |
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*/ |
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protected function allItemsRestricted($items) |
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{ |
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// Check if every provided item is restricted. |
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foreach ($items as $item) { |
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if ($this->isAllowed($item)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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