更新用户权限模块功能

app/Services/Auth/DepartmentService.php

@@ -324,4 +324,40 @@ class DepartmentService
         }
         return $this->isDescendant($id, $child->parent_id);
     }
+
+    /**
+     * 获取部门及所有子部门的ID列表
+     *
+     * @param int $departmentId 部门ID
+     * @param array $departments 所有部门数据
+     * @return array
+     */
+    public function getDepartmentAndChildrenIds(int $departmentId, array $departments = null): array
+    {
+        if ($departments === null) {
+            $departments = Department::where('status', 1)->get()->keyBy('id')->toArray();
+        }
+
+        $ids = [$departmentId];
+        $this->collectChildrenIds($departmentId, $departments, $ids);
+
+        return $ids;
+    }
+
+    /**
+     * 递归收集子部门ID
+     *
+     * @param int $parentId 父部门ID
+     * @param array $departments 所有部门数据
+     * @param array &$ids ID收集数组
+     */
+    private function collectChildrenIds(int $parentId, array $departments, array &$ids): void
+    {
+        foreach ($departments as $department) {
+            if ($department['parent_id'] == $parentId) {
+                $ids[] = $department['id'];
+                $this->collectChildrenIds($department['id'], $departments, $ids);
+            }
+        }
+    }
 }