method to check whether group has multiple (all) permissions

Author: zefir-git

src/auth/PermissionGroup.ts

@@ -28,6 +28,17 @@ export class PermissionGroup implements Permissible, Iterable<Permission> {
         return false;
     }
 
+    /**
+     * Check that the group has all the specified permissions.
+     * @param permissions The permissions to check.
+     */
+    public hasAll(permissions: Iterable<Permission>): boolean {
+        for (const permission of permissions)
+            if (!this.has(permission))
+                return false;
+        return true;
+    }
+
     /**
      * An iterator over the permissions in this group.
      */