added RBAC

lib/User/Model/Assignment.php

@@ -0,0 +1,54 @@
+<?php
+namespace Da\User\Model;
+
+use Da\User\Traits\AuthManagerTrait;
+use Da\User\Validator\RbacItemsValidator;
+use yii\base\InvalidConfigException;
+use yii\base\Model;
+use Yii;
+
+class Assignment extends Model
+{
+    use AuthManagerTrait;
+
+    public $items = [];
+    public $user_id;
+    public $updated = false;
+
+    /**
+     * @inheritdoc
+     * @throws InvalidConfigException
+     */
+    public function init()
+    {
+        parent::init();
+
+        if($this->user_id === null) {
+            throw new InvalidConfigException('"user_id" must be set.');
+        }
+
+        $this->items = array_keys($this->getAuthManager()->getItemsByUser($this->user_id));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function attributeLabels()
+    {
+        return [
+            'items' => Yii::t('user', 'Items')
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function rules()
+    {
+        return [
+            ['user_id', 'required'],
+            ['items', RbacItemsValidator::class],
+            ['user_id', 'integer']
+        ];
+    }
+}