Merge pull request #5 from growthdev-repo/feature/create-strategy-pattern

Feature/create strategy pattern

Author: walmirsilva

README.md

@@ -10,9 +10,14 @@ Casos você queira se aprofundar no tema, não deixe  de conheceu o site Growth
 ## Organização do Projeto:
 
 - `src/`
+    - `Behavioral/`
+    - `Creational/`
+    - `Structural/`    
+- `tests/`
     - `Behavioral/`
     - `Creational/`
     - `Structural/`
+    
 
 A estrutura da pastas de `tests/` segue a mesma estrutura
 
@@ -36,7 +41,9 @@ Este projetos tem um arquivo `Makefile` para a execução dos testes
 
     `make test`
 
+5. Para executar os testes de uma classe especídica:
 
+    `make test NomeDaClass`
 ## Sobre nós
 
 Este projeto foi desenvoldido por Walmir Silva autor do blog [https://growthdev.com.br](https://growthdev.com.br/)

src/Behavioral/Strategy/Payment/CashPaymentMethod.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class CashPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.10; // 10%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}

src/Behavioral/Strategy/Payment/CreditCardPaymentMethod.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class CreditCardPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.00; // 0%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}

src/Behavioral/Strategy/Payment/DebitCardPaymentMethod.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class DebitCardPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.05;  // 5%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}

src/Behavioral/Strategy/Payment/PaymentMethodStrategy.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+interface PaymentMethodStrategy
+{
+    public function pay(float $amount): float;
+}

src/Behavioral/Strategy/Payment/PaymentProcessor.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+final class PaymentProcessor
+{
+    private PaymentMethodStrategy $paymentMethod;
+    private float $amount;
+
+    public function __construct(PaymentMethodStrategy $paymentMethod)
+    {
+        $this->paymentMethod = $paymentMethod;
+    }
+
+    public function processPayment(float $amount): void
+    {
+        $this->amount = $this->paymentMethod->pay($amount);
+    }
+
+    public function getAmount(): float
+    {
+        return $this->amount;
+    }
+}

src/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategy.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+final class PaymentProcessorWithoutStrategy
+{
+    public const PAYMENT_TYPE_CREDIT_CARD = 'credit_card';
+    public const PAYMENT_TYPE_DEBIT_CARD = 'debit_card';
+    public const PAYMENT_TYPE_CASH = 'by_cash';
+
+    private string $paymentMethod;
+    private float $amount;
+
+    public function __construct(string $paymentMethod)
+    {
+        $this->paymentMethod = $paymentMethod;
+    }
+
+    public function processPayment(float $amount): void
+    {
+        switch ($this->paymentMethod) {
+            case self::PAYMENT_TYPE_CREDIT_CARD:
+                $creditCard = new CreditCardPaymentMethod();
+                $this->amount = $creditCard->pay($amount);
+                break;
+            case self::PAYMENT_TYPE_DEBIT_CARD:
+                $debitCard = new DebitCardPaymentMethod();
+                $this->amount = $debitCard->pay($amount);
+                break;
+            case self::PAYMENT_TYPE_CASH:
+                $cash = new CashPaymentMethod();
+                $this->amount = $cash->pay($amount);
+                break;
+            default:
+                throw new \InvalidArgumentException('Invalid payment method');
+        }
+    }
+
+    public function getAmount(): float
+    {
+        return $this->amount;
+    }
+}

src/Behavioral/Strategy/WithMethodFactory/AcousticGuitarStrategy.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\MusicalInstrumentStrategy;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Factory\AcousticGuitarFactory;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\AcousticGuitar;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class AcousticGuitarStrategy implements MusicalInstrumentStrategy
+{
+    private string $brand;
+
+    public function __construct(string $brand)
+    {
+        $this->brand = $brand;
+    }
+
+    public function build(): MusicalInstrument
+    {
+        return (new AcousticGuitarFactory())
+            ->createMusicalInstrument($this->brand);
+    }
+}

src/Behavioral/Strategy/WithMethodFactory/ElectricGuitarStrategy.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\MusicalInstrumentStrategy;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Factory\ElectricGuitarFactory;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class ElectricGuitarStrategy implements MusicalInstrumentStrategy
+{
+    private string $brand;
+
+    public function __construct(string $brand)
+    {
+        $this->brand = $brand;
+    }
+
+    public function build(): MusicalInstrument
+    {
+        return (new ElectricGuitarFactory())
+            ->createMusicalInstrument($this->brand);
+    }
+}

src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentFactory.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class MusicalInstrumentFactory
+{
+    public function createMusicalInstrument(
+        MusicalInstrumentStrategy $musicalInstrument
+    ): MusicalInstrument {
+        return $musicalInstrument->build();
+    }
+}
+
+
+