add services + more structural additions

lib/User/Helper/AuthHelper.php

@@ -1,6 +1,7 @@
 <?php
 namespace Da\User\Helper;
 
+use Da\User\Module;
 use Yii;
 
 /**
@@ -22,12 +23,24 @@ class AuthHelper
      */
     public function hasRole($userId, $role)
     {
-        if (Yii::$app->authManager) {
-            $roles = array_keys(Yii::$app->authManager->getRolesByUser($userId));
+        if (Yii::$app->getAuthManager()) {
+            $roles = array_keys(Yii::$app->getAuthManager()->getRolesByUser($userId));
 
             return in_array($role, $roles, true);
         }
 
         return false;
     }
+
+    public function isAdmin($username)
+    {
+        /** @var Module $module */
+        $module = Yii::$app->getModule('user');
+        $hasAdministratorPermissionName = Yii::$app->getAuthManager() && $module->administratorPermissionName
+            ? Yii::$app->getUser()->can($module->administratorPermissionName)
+            : false;
+
+        return $hasAdministratorPermissionName || in_array($username, $module->administrators);
+    }
+
 }

lib/User/Helper/SecurityHelper.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Da\User\Helper;
+
+use yii\base\Security;
+
+class SecurityHelper
+{
+    /**
+     * @var Security
+     */
+    protected $security;
+
+    public function __construct(Security $security)
+    {
+        $this->security = $security;
+    }
+
+    /**
+     * Generates a secure hash from a password and a random salt.
+     *
+     * @param string $password
+     * @param null|int $cost
+     *
+     * @return string
+     */
+    public function generatePasswordHash($password, $cost = null)
+    {
+        return $this->security->generatePasswordHash($password, $cost);
+    }
+
+    public function validatePassword($password, $hash)
+    {
+        return $this->security->validatePassword($password, $hash);
+    }
+
+    public function generatePassword($length)
+    {
+        $sets = [
+            'abcdefghjkmnpqrstuvwxyz',
+            'ABCDEFGHJKMNPQRSTUVWXYZ',
+            '23456789',
+        ];
+        $all = '';
+        $password = '';
+        foreach ($sets as $set) {
+            $password .= $set[array_rand(str_split($set))];
+            $all .= $set;
+        }
+
+        $all = str_split($all);
+        for ($i = 0; $i < $length - count($sets); $i++) {
+            $password .= $all[array_rand($all)];
+        }
+
+        $password = str_shuffle($password);
+
+        return $password;
+    }
+}