Implemented account deletion. Not all cases covered with tests [skip ci]

common/models/UsernameHistory.php

@@ -1,29 +1,32 @@
 <?php
+declare(strict_types=1);
+
 namespace common\models;
 
 use yii\behaviors\TimestampBehavior;
+use yii\db\ActiveQuery;
 use yii\db\ActiveRecord;
 
 /**
  * Fields:
- * @property integer $id
- * @property string  $username
- * @property integer $account_id
- * @property integer $applied_in
+ * @property int      $id
+ * @property string   $username
+ * @property int|null $account_id
+ * @property int      $applied_in
  *
  * Relations:
- * @property Account $account
+ * @property-read Account $account
  *
  * Behaviors:
  * @mixin TimestampBehavior
  */
 class UsernameHistory extends ActiveRecord {
 
-    public static function tableName() {
-        return '{{%usernames_history}}';
+    public static function tableName(): string {
+        return 'usernames_history';
     }
 
-    public function behaviors() {
+    public function behaviors(): array {
         return [
             [
                 'class' => TimestampBehavior::class,
@@ -33,19 +36,17 @@ class UsernameHistory extends ActiveRecord {
         ];
     }
 
-    public function rules() {
-        return [];
-    }
-
-    public function getAccount() {
+    public function getAccount(): ActiveQuery {
         return $this->hasOne(Account::class, ['id' => 'account_id']);
     }
 
     /**
+     * Find the username after the current of the account.
+     *
      * @param int $afterTime
      * @return UsernameHistory|null
      */
-    public function findNext(int $afterTime = null): ?self {
+    public function findNextOwnerUsername(int $afterTime = null): ?self {
         return self::find()
             ->andWhere(['account_id' => $this->account_id])
             ->andWhere(['>', 'applied_in', $afterTime ?: $this->applied_in])