add currency converter classes

Author: git-growthdev

src/Structural/Adapter/CurrencyConverter.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Structural\Adapter;
+
+interface CurrencyConverter
+{
+ public function convert(float $amount): float;
+}

src/Structural/Adapter/CurrencyConverterAdapter.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Structural\Adapter;
+
+final class CurrencyConverterAdapter
+{
+ private CurrencyConverter $currencyConverter;
+
+ public function __construct(CurrencyConverter $currencyConverter)
+ {
+ $this->currencyConverter = $currencyConverter;
+ }
+
+ public function convert(float $amount): float
+ {
+ return $this->currencyConverter->convert($amount);
+ }
+}

src/Structural/Adapter/CurrencyToDollarConverter.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Structural\Adapter;
+
+final class CurrencyToDollarConverter implements CurrencyConverter
+{
+ public function convert(float $amount): float
+ {
+ return $amount * 5.61; // 1$ = R$ 5.61
+ }
+}

src/Structural/Adapter/CurrencyToEuroConverter.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Structural\Adapter;
+
+final class CurrencyToEuroConverter implements CurrencyConverter
+{
+ public function convert(float $amount): float
+ {
+ return $amount * 6.35; // 1 EUR = R$ 6.35
+ }
+}