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modules/ps_facebook/classes/Provider/AccessTokenProvider.php

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+<?php
+/**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Academic Free License version 3.0
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/AFL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/AFL-3.0 Academic Free License version 3.0
+ */
+
+namespace PrestaShop\Module\PrestashopFacebook\Provider;
+
+use Controller;
+use GuzzleHttp\Psr7\Request;
+use PrestaShop\Module\PrestashopFacebook\Adapter\ConfigurationAdapter;
+use PrestaShop\Module\PrestashopFacebook\API\ResponseListener;
+use PrestaShop\Module\PrestashopFacebook\Config\Config;
+use PrestaShop\Module\PrestashopFacebook\Exception\AccessTokenException;
+use PrestaShop\Module\PrestashopFacebook\Factory\ApiClientFactoryInterface;
+
+class AccessTokenProvider
+{
+    /**
+     * @var ConfigurationAdapter
+     */
+    private $configurationAdapter;
+
+    /**
+     * @var Controller
+     */
+    private $controller;
+
+    /**
+     * @var ApiClientFactoryInterface
+     */
+    private $psApiClientFactory;
+
+    /**
+     * @var ResponseListener
+     */
+    private $responseListener;
+
+    /**
+     * @var string
+     */
+    private $userAccessToken;
+
+    /**
+     * @var string|null
+     */
+    private $systemAccessToken;
+
+    public function __construct(
+        ConfigurationAdapter $configurationAdapter,
+        ResponseListener $responseListener,
+        $controller,
+        ApiClientFactoryInterface $psApiClientFactory
+    ) {
+        $this->configurationAdapter = $configurationAdapter;
+        $this->responseListener = $responseListener;
+        $this->controller = $controller;
+        $this->psApiClientFactory = $psApiClientFactory;
+    }
+
+    /**
+     * @return string
+     */
+    public function getUserAccessToken()
+    {
+        if (!$this->userAccessToken) {
+            $this->getOrRefreshTokens();
+        }
+
+        return $this->userAccessToken;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getSystemAccessToken()
+    {
+        if (!$this->systemAccessToken) {
+            $this->getOrRefreshTokens();
+        }
+
+        return $this->systemAccessToken;
+    }
+
+    /**
+     * Load data from configuration table and request from API them if something is missing
+     */
+    private function getOrRefreshTokens()
+    {
+        $this->userAccessToken = $this->configurationAdapter->get(Config::PS_FACEBOOK_USER_ACCESS_TOKEN);
+        $this->systemAccessToken = $this->configurationAdapter->get(Config::PS_FACEBOOK_SYSTEM_ACCESS_TOKEN);
+        $tokenExpirationDate = $this->configurationAdapter->get(Config::PS_FACEBOOK_USER_ACCESS_TOKEN_EXPIRATION_DATE);
+        $currentTimestamp = time();
+
+        if ((!$this->systemAccessToken
+                || !$tokenExpirationDate
+                || ($tokenExpirationDate - $currentTimestamp <= 86400))
+            && isset($this->controller->controller_type)
+            && $this->controller->controller_type === 'moduleadmin'
+            && $this->userAccessToken
+        ) {
+            $this->refreshTokens();
+        }
+    }
+
+    /**
+     * Exchange existing tokens with new ones, then store them in the DB + make them available in this class
+     *
+     * @return void
+     */
+    public function refreshTokens()
+    {
+        $externalBusinessId = $this->configurationAdapter->get(Config::PS_FACEBOOK_EXTERNAL_BUSINESS_ID);
+        $accessToken = $this->configurationAdapter->get(Config::PS_FACEBOOK_USER_ACCESS_TOKEN);
+
+        $managerId = $this->configurationAdapter->get(Config::PS_FACEBOOK_BUSINESS_MANAGER_ID);
+        if (!$managerId) {
+            // Force as null, otherwise it gets a falsy value in the API request
+            $managerId = null;
+        }
+
+        $response = $this->responseListener->handleResponse(
+            $this->psApiClientFactory->createClient()->sendRequest(
+                new Request(
+                    'POST',
+                    '/account/' . $externalBusinessId . '/exchange_tokens',
+                    [],
+                    json_encode([
+                        'userAccessToken' => $accessToken,
+                        'businessManagerId' => $managerId,
+                    ])
+                )
+            ),
+            [
+                'exceptionClass' => AccessTokenException::class,
+            ]
+        );
+
+        if (!$response->isSuccessful()) {
+            return;
+        }
+
+        $responseContent = $response->getBody();
+
+        if (isset($responseContent['longLived']['access_token'])) {
+            $tokenExpiresIn = time() + (70 * 365 * 24 * 3600); // never expires
+            $this->userAccessToken = $responseContent['longLived']['access_token'];
+
+            $this->configurationAdapter->updateValue(Config::PS_FACEBOOK_USER_ACCESS_TOKEN, $this->userAccessToken);
+            $this->configurationAdapter->updateValue(Config::PS_FACEBOOK_USER_ACCESS_TOKEN_EXPIRATION_DATE, $tokenExpiresIn);
+        }
+
+        if (isset($responseContent['system']['access_token'])) {
+            $this->systemAccessToken = $responseContent['system']['access_token'];
+            $this->configurationAdapter->updateValue(Config::PS_FACEBOOK_SYSTEM_ACCESS_TOKEN, $this->systemAccessToken);
+        }
+    }
+
+    /**
+     * Exchange existing tokens with new ones, then store them in the DB + make them available in this class
+     *
+     * @return array|null
+     */
+    public function retrieveTokens()
+    {
+        $externalBusinessId = $this->configurationAdapter->get(Config::PS_FACEBOOK_EXTERNAL_BUSINESS_ID);
+
+        $response = $this->responseListener->handleResponse(
+            $this->psApiClientFactory->createClient()->sendRequest(
+                new Request(
+                'GET',
+                '/account/' . $externalBusinessId . '/app_tokens'
+                )
+            ),
+            [
+                'exceptionClass' => AccessTokenException::class,
+            ]
+        );
+
+        if (!$response->isSuccessful()) {
+            return null;
+        }
+
+        return $response->getBody();
+    }
+}