PHP - Apply Factory Method Pattern

PHP/Patterns/index.php

@@ -1,12 +1,12 @@
 <?php
 
- 
+
 use DesignPatterns\Behavioral\Observer\Exercise\Models\Blog;
 use DesignPatterns\Behavioral\Observer\Exercise\Models\User;
 use DesignPatterns\Behavioral\Observer\Exercise\Enums\EventType;
 use DesignPatterns\Behavioral\Observer\Exercise\Models\NewsLetter;
 use DesignPatterns\Behavioral\Observer\Exercise\NewsLetterNotification;
- 
+
 
 require_once __DIR__ . DIRECTORY_SEPARATOR . 'vendor' . DIRECTORY_SEPARATOR . 'autoload.php';
 
@@ -26,8 +26,16 @@
 
 // newsletter example
 // Get the current date and time
-$publishedAt = new DateTime();
-$newsletter = new NewsLetterNotification();
-$newsletter->subscribe(EventType::BLOG,new User('Ahmed'));
-$newsletter->addBlog(new Blog('test blog tilte','test blog content',$publishedAt));
-$newsletter->addNewsLetter(new NewsLetter('test newsletter tilte','test newsletter content',$publishedAt));
+//$publishedAt = new DateTime();
+//$newsletter = new NewsLetterNotification();
+//$newsletter->subscribe(EventType::BLOG,new User('Ahmed'));
+//$newsletter->addBlog(new Blog('test blog tilte','test blog content',$publishedAt));
+//$newsletter->addNewsLetter(new NewsLetter('test newsletter tilte','test newsletter content',$publishedAt));
+
+
+// factory method example
+//$processor = new DesignPatterns\Creational\FactoryMethod\PaymentProcessor();
+//echo $processor->processPayment('VISA');
+//echo PHP_EOL;
+//echo $processor->processPayment('MASTER_CARD');
+

PHP/Patterns/src/Creational/FactoryMethod/AmericanExpress.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+class AmericanExpress implements PaymentMethod
+{
+    private string $cardNumber;
+    private string $cardHolder;
+    private string $expiryDate;
+    private string $cvv;
+
+    public function authorize(): string
+    {
+        return "Authorizing American Express card...\n";
+    }
+
+    public function moneyTransfer(): string
+    {
+        return 'Transferring money using American Express card...\n';
+    }
+
+    public function calculatePaymentFees(): float
+    {
+        return 0.035; // 3.5% fee
+    }
+
+    public function getCardNumber(): string
+    {
+        return $this->cardNumber;
+    }
+
+    public function setCardNumber(string $cardNumber): void
+    {
+        $this->cardNumber = $cardNumber;
+    }
+
+    public function getCardHolder(): string
+    {
+        return $this->cardHolder;
+    }
+
+    public function setCardHolder(string $cardHolder): void
+    {
+        $this->cardHolder = $cardHolder;
+    }
+
+    public function getExpiryDate(): string
+    {
+        return $this->expiryDate;
+    }
+
+    public function setExpiryDate(string $expiryDate): void
+    {
+        $this->expiryDate = $expiryDate;
+    }
+
+    public function getCvv(): string
+    {
+        return $this->cvv;
+    }
+
+    public function setCvv(string $cvv): void
+    {
+        $this->cvv = $cvv;
+    }
+}
+

PHP/Patterns/src/Creational/FactoryMethod/MasterCard.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+class MasterCard implements PaymentMethod
+{
+    private string $cardNumber;
+    private string $cardHolder;
+    private string $expiryDate;
+    private string $cvv;
+
+    public function authorize(): string
+    {
+        return "Authorizing MasterCard...\n";
+    }
+
+    public function moneyTransfer(): string
+    {
+        return "Transferring money using MasterCard...\n";
+    }
+
+    public function calculatePaymentFees(): float
+    {
+        return 0.03; // 3% fee
+    }
+
+    public function getCardNumber(): string
+    {
+        return $this->cardNumber;
+    }
+
+    public function setCardNumber(string $cardNumber): void
+    {
+        $this->cardNumber = $cardNumber;
+    }
+
+    public function getCardHolder(): string
+    {
+        return $this->cardHolder;
+    }
+
+    public function setCardHolder(string $cardHolder): void
+    {
+        $this->cardHolder = $cardHolder;
+    }
+
+    public function getExpiryDate(): string
+    {
+        return $this->expiryDate;
+    }
+
+    public function setExpiryDate(string $expiryDate): void
+    {
+        $this->expiryDate = $expiryDate;
+    }
+
+    public function getCvv(): string
+    {
+        return $this->cvv;
+    }
+
+    public function setCvv(string $cvv): void
+    {
+        $this->cvv = $cvv;
+    }
+}
+

PHP/Patterns/src/Creational/FactoryMethod/PaymentMethod.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+interface PaymentMethod
+{
+    public function authorize(): mixed;
+    public function moneyTransfer(): mixed;
+    public function calculatePaymentFees(): float;
+    public function getCardNumber(): string;
+    public function setCardNumber(string $cardNumber): void;
+    public function getCardHolder(): string;
+    public function setCardHolder(string $cardHolder): void;
+    public function getExpiryDate(): string;
+    public function setExpiryDate(string $expiryDate): void;
+    public function getCvv(): string;
+    public function setCvv(string $cvv): void;
+}

PHP/Patterns/src/Creational/FactoryMethod/PaymentMethodFactory.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+class PaymentMethodFactory
+{
+    public function createPaymentMethod(string $cardType): PaymentMethod
+    {
+        return match (strtoupper($cardType)) {
+            'VISA' => new Visa(),
+            'MASTER_CARD' => new MasterCard(),
+            'AMERICAN_EXPRESS' => new AmericanExpress(),
+            default => throw new \InvalidArgumentException("Unknown card type: {$cardType}")
+        };
+    }
+}
+

PHP/Patterns/src/Creational/FactoryMethod/PaymentProcessor.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+use function var_dump;
+
+class PaymentProcessor
+{
+    private PaymentMethodFactory $paymentMethodFactory;
+
+    public function __construct()
+    {
+        $this->paymentMethodFactory = new PaymentMethodFactory();
+    }
+
+    public function processPayment(string $cardType): mixed
+    {
+        $paymentMethod = $this->paymentMethodFactory->createPaymentMethod($cardType);
+        return ' => ' . $paymentMethod->authorize() . ' => ' . $paymentMethod->moneyTransfer();
+    }
+}
+

PHP/Patterns/src/Creational/FactoryMethod/Visa.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+class Visa implements PaymentMethod
+{
+    private string $cardNumber;
+    private string $cardHolder;
+    private string $expiryDate;
+    private string $cvv;
+
+    public function authorize(): string
+    {
+        return "Authorizing Visa card...\n";
+    }
+
+    public function moneyTransfer(): string
+    {
+        return "Transferring money using Visa card...\n";
+    }
+
+    public function calculatePaymentFees(): float
+    {
+        return 0.025; // 2.5% fee
+    }
+
+    public function getCardNumber(): string
+    {
+        return $this->cardNumber;
+    }
+
+    public function setCardNumber(string $cardNumber): void
+    {
+        $this->cardNumber = $cardNumber;
+    }
+
+    public function getCardHolder(): string
+    {
+        return $this->cardHolder;
+    }
+
+    public function setCardHolder(string $cardHolder): void
+    {
+        $this->cardHolder = $cardHolder;
+    }
+
+    public function getExpiryDate(): string
+    {
+        return $this->expiryDate;
+    }
+
+    public function setExpiryDate(string $expiryDate): void
+    {
+        $this->expiryDate = $expiryDate;
+    }
+
+    public function getCvv(): string
+    {
+        return $this->cvv;
+    }
+
+    public function setCvv(string $cvv): void
+    {
+        $this->cvv = $cvv;
+    }
+}