add Telegram bot tokens table and API methods

frontend/modules/api/services/UserTgBotTokenService.php

@@ -0,0 +1,131 @@
+<?php
+
+namespace frontend\modules\api\services;
+
+
+use DateTime;
+use Exception;
+use frontend\modules\api\models\profile\User;
+use frontend\modules\api\models\UserTgBotToken;
+use Yii;
+
+class UserTgBotTokenService
+{
+    const CHARACTERS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+    /**
+     * @param int $userId
+     * @return UserTgBotToken
+     * @throws Exception
+     */
+    public function getToken(int $userId)
+    {
+        $model = UserTgBotToken::findOne(['user_id' => $userId]);
+        if (!empty($model)) {
+            return $this->checkExpiredAtTime($model);
+        }
+
+        return $this->createToken($userId);
+    }
+
+    /**
+     * @param string $token
+     * @return User|string[]
+     * @throws Exception
+     */
+    public function getUserByToken(string $token)
+    {
+        $model = UserTgBotToken::findOne(['token' => $token]);
+        if (!empty($model) ) {
+
+            $currentTime = new DateTime();
+
+            if ($currentTime < new DateTime($model->expired_at)) {
+                return $model->user;
+            } else {
+                return ['error' => 'The token is expired!'];
+            }
+
+        }
+
+        return ['error' => 'Token not found!'];
+    }
+
+    /**
+     * @return string
+     * @throws Exception
+     */
+    private function generateToken(): string
+    {
+        $length = Yii::$app->params['tgBotTokenLength'];
+        $charactersLength = strlen($this::CHARACTERS);
+        do {
+            $value = '';
+            for ($i = 0; $i < $length; $i++) {
+                $value .= $this::CHARACTERS[random_int(0, $charactersLength - 1)];
+            }
+        } while ( UserTgBotToken::checkExistsByToken($value));
+
+        return $value;
+    }
+
+    /**
+     * @param int $userId
+     * @return UserTgBotToken
+     * @throws Exception
+     */
+    private function createToken(int $userId): UserTgBotToken
+    {
+        $model = new UserTgBotToken();
+        $model->user_id = $userId;
+        $model->token = $this->generateToken();
+        $model->expired_at = $this->generateExpiredAtTime();
+
+        if (!$model->save()) {
+            throw new \Exception('Токен не сохранен');
+        }
+
+        return $model;
+    }
+
+    /**
+     * @return false|string
+     */
+    private function generateExpiredAtTime()
+    {
+        return date("Y-m-d H:i:s",strtotime(date("Y-m-d H:i:s")) +  Yii::$app->params['tgBotTokenValidityTime']);
+    }
+
+    /**
+     * @param UserTgBotToken $model
+     * @return UserTgBotToken
+     * @throws Exception
+     */
+    private function checkExpiredAtTime(UserTgBotToken $model)
+    {
+        $currentTime = new DateTime();
+
+        if ($currentTime > new DateTime($model->expired_at)) {
+            $this->updateExpiredAtTime($model);
+        }
+
+        return $model;
+    }
+
+    /**
+     * @param UserTgBotToken $model
+     * @return UserTgBotToken
+     * @throws Exception
+     */
+    private function updateExpiredAtTime(UserTgBotToken $model)
+    {
+        $model->token = $this->generateToken();
+        $model->expired_at = $this->generateExpiredAtTime();
+
+        if (!$model->save()) {
+            throw new \Exception('Токен не сохранен');
+        }
+
+        return $model;
+    }
+}