Examples for presentation.

sources/Example/Bad/CalculatorService.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Example\Bad;
+
+class CalculatorService
+{
+    private float $vatPercent;
+    private APIService  $apiService;
+
+    public function __construct(float $vatPercent, APIService $apiService)
+    {
+        $this->vatPercent = $vatPercent;
+        $this->apiService = $apiService;
+    }
+
+
+    /**
+     * @return Product[]
+     */
+    public function getProducts(string $requestData) : array {
+        $products = $this->apiService->getProducts($requestData);
+
+        foreach ($products as $product) {
+            $product->price = $product->price * ( 1 + $this->vatPercent);
+        }
+
+        return $products;
+    }
+}