refactor: cria funçoes base no model para gerenciar transaçao

upload/catalog/model/extension/payment/pagseguro.php

@@ -1,9 +1,94 @@
 <?php
 
+require_once DIR_SYSTEM . 'library/PagSeguro/vendor/autoload.php';
+
+use ValdeirPsr\PagSeguro\Domains\Environment;
+use ValdeirPsr\PagSeguro\Request\Session;
+
 class ModelExtensionPaymentPagSeguro extends Model
 {
+    const EXTENSION_PREFIX = 'payment_pagseguro_';
+
     public function getMethod($address, $total)
     {
         return [];
     }
+
+    /**
+     * Captura os campos personalizados
+     *
+     * @return array
+     */
+    public function getCustomFieldValues(int $order_id)
+    {
+        $query = $this->db->query('SELECT custom_field FROM ' . DB_PREFIX . 'order WHERE order_id = ' . $order_id);
+
+        return json_decode($query->row['custom_field'], true);
+    }
+
+    /**
+     * Gera uma nova sessão para o pedido
+     *
+     * @return string
+     */
+    public function generateSession(): string
+    {
+        $env = $this->factoryEnvironment();
+        $session = new Session($env);
+        return $session->generate();
+    }
+
+    /**
+     * Captura o valor do frete
+     *
+     * @return float
+     */
+    public function getShippingCost($totals): float
+    {
+        $result = array_filter($totals, function ($item) {
+            return $item['code'] === 'shipping';
+        });
+
+        $result = array_reduce($result, function ($sum, $item) {
+            return $sum += $item['value'];
+        }, 0);
+
+        return floatval($result);
+    }
+
+    /**
+     * Captura os valores extras
+     *
+     * @return float
+     */
+    public function getExtraAmount($totals): float
+    {
+        $result = array_filter($totals, function ($item) {
+            return !in_array($item['code'], ['sub_total', 'shipping', 'total']);
+        });
+
+        $result = array_reduce($result, function ($sum, $item) {
+            return $sum += $item['value'];
+        }, 0);
+
+        return floatval($result);
+    }
+
+    /**
+     * Instancia um objeto do tipo Environment
+     * conforme a configuração de sandbox.
+     *
+     * @return Environment
+     */
+    public function factoryEnvironment(): Environment
+    {
+        $email = $this->config->get(self::EXTENSION_PREFIX . 'email');
+        $token = $this->config->get(self::EXTENSION_PREFIX . 'token');
+
+        if ($this->config->get(self::EXTENSION_PREFIX . 'sandbox')) {
+            return Environment::sandbox($email, $token);
+        }
+
+        return Environment::production($email, $token);
+    }
 }