feat(paystack): Add Facade, ServiceProvider, Exceptions and Paystack Mother class

Author: unicodeveloper

resources/config/paystack.php

@@ -2,8 +2,42 @@
 
 return [
 
-    'apiKey' => '',
+    /**
+     *
+     *
+     */
+    'publicKey' => 'pk_test_489661a873de9d88380ceb58ad994d39a08255d9',
+
+    /**
+     *
+     *
+     */
+    'secretKey' => 'sk_test_15636445eb184d45e6c742e53dee2df4685ed18c',
+
+    /**
+     *
+     *
+     */
+    'merchantID' => '',
+
+    /**
+     *
+     *
+     */
+    'paymentURL' => 'https://api.paystack.co/transaction/initialize',
+
+     /**
+      * The route where paystack will redirect to after the payment has been made
+      *
+      */
+    'callbackURL' => '',
+
+    /**
+     * Optional email address of the merchant
+     *
+     */
+    'merchantEmail' => ''
+
 
-    'apiSecret' => ''
 
 ];

src/Exceptions/PaymentVerificationFailedException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace Unicodeveloper\Paystack\Exceptions;
+
+use Exception;
+
+class PaymentVerificationFailedException extends Exception {
+
+}

src/Facades/PaystackFacade.php

@@ -1,17 +1,17 @@
 <?php
 
-namespace Unicodeveloper\Quotes\Facades;
+namespace Unicodeveloper\Paystack\Facades;
 
 use Illuminate\Support\Facades\Facade;
 
-class QuotesFacade extends Facade {
+class PaystackFacade extends Facade {
     /**
    * Get the registered name of the component.
    *
    * @return string
    */
     protected static function getFacadeAccessor()
     {
-        return 'laravel-quotes';
+        return 'laravel-paystack';
     }
 }

src/Paystack.php

@@ -1,9 +1,198 @@
 <?php
 
-namespace Unicodeveloper\Quotes;
+namespace Unicodeveloper\Paystack;
 
 use GuzzleHttp\Client;
 
-class Quotes {
+class Paystack {
 
+    /**
+     * Transaction Verification Successful
+     */
+    const VS = 'Verification successful';
+
+    /**
+     *  Invalid Transaction reference
+     */
+    const ITF = "Invalid transaction reference";
+
+
+    /**
+     * Issue Secret Key from your Paystack Dashboard
+     * @var mixed
+     */
+    protected $secretKey;
+
+
+    /**
+     * Instance of Client
+     * @var object
+     */
+    protected $client;
+
+    /**
+     *  Response from requests made to Paystack
+     * @var mixed
+     */
+    protected $response;
+
+    /**
+     * Paystack API base Url
+     * @var string
+     */
+    protected $baseUrl = 'https://api.paystack.co';
+
+    /**
+     * Authorization Url - Paystack payment page
+     * @var string
+     */
+    protected $authorizationUrl;
+
+    public function __construct()
+    {
+        $this->setKey();
+        $this->setRequestOptions();
+    }
+
+    /**
+     * Get secret key from paystack config file
+     * @return  void
+     */
+    public function setKey()
+    {
+        $this->secretKey = config('paystack.secretKey');
+    }
+
+    /**
+     * Set options for making the Client request
+     * @return  void
+     */
+    private function setRequestOptions()
+    {
+        $authBearer = 'Bearer '. $this->secretKey;
+
+        $this->client = new Client(['base_uri' => $this->baseUrl]);
+
+        //Set a single header using path syntax
+        $this->client->setDefaultOption('headers', [
+            'Authorization' => $authBearer,
+            'Content-Type'  => 'application/json',
+            'Accept'        => 'application/json'
+        ]);
+    }
+
+    /**
+     * Initiate a payment request to Paystack
+     * @return Unicodeveloper\Paystack\Paystack
+     */
+    public function makePaymentRequest()
+    {
+        $this->setResponse('/transaction/initialize');
+
+        return $this;
+    }
+
+    /**
+     * Make the client request and get the response
+     * @param string $relativeUrl
+     * @return Unicodeveloper\Paystack\Paystack
+     */
+    public function setResponse($relativeUrl)
+    {
+        $data = [
+            "amount" => intval(request()->amount),
+            "reference" => request()->reference,
+            "email" => request()->email
+        ];
+
+        $this->response = $this->client->post($this->baseUrl . $relativeUrl, [
+            'body' => json_encode($data)
+        ]);
+
+        return $this;
+    }
+
+    /**
+     * Get the authorization url from the callback response
+     * @return Unicodeveloper\Paystack\Paystack
+     */
+    public function getAuthorizationUrl()
+    {
+        $this->makePayment();
+
+        $this->url = $this->response->json()["data"]["authorization_url"];
+
+        return $this;
+    }
+
+    /**
+     * Hit Paystack Gateway to Verify that the transaction is valid
+     * @return void
+     */
+    private function verifyTransactionAtGateway()
+    {
+        $transactionRef = request()->query('trxref');
+
+        $relativeUrl = "/transaction/verify/{$transactionRef}";
+
+        $this->response = $this->client->get($this->baseUrl . $relativeUrl, []);
+    }
+
+    /**
+     * True or false condition whether the transaction is verified
+     * @return boolean
+     */
+    public function isTransactionVerificationValid()
+    {
+        $this->verifyTransactionAtGateway();
+
+        $result = $this->response->json()["message"];
+
+        switch($result)
+        {
+            case self::VS:
+                $validate = true;
+                break;
+            case self:ITF:
+                $validate = false;
+                break;
+            default:
+                $validate = false;
+                break;
+        }
+
+        return $validate;
+    }
+
+    /**
+     * Get Payment details if the transaction was verified successfully
+     * @throws Unicodeveloper\Paystack\Exceptions\PaymentVerificationFailedException
+     * @return json
+     */
+    public function getPaymentData()
+    {
+        if($this->isTransactionVerificationValid()) {
+            return $this->response->json();
+        } else {
+            throw new PaymentVerificationFailedException("Invalid Transaction Reference");
+        }
+    }
+
+    /**
+     * Fluent method to redirect to Paystack Payment Page
+     * @return Illuminate\Support\Redirect
+     */
+    public function redirectNow()
+    {
+        return redirect($this->url);
+    }
+
+    /**
+     * Get Access code from transaction callback respose
+     * @return string
+     */
+    public function getAccessCode()
+    {
+        return $this->response->json()["data"]["access_code"];
+    }
 }

src/PaystackServiceProvider.php

@@ -13,14 +13,18 @@ class PaystackServiceProvider extends ServiceProvider {
    */
   protected $defer = false;
 
+  public function boot()
+  {
+  }
+
   /**
    * Register the application services.
    *
    * @return void
    */
   public function register()
   {
-      $this->app->bind('laravel-paystack', function() {
+        $this->app->bind('laravel-paystack', function() {
 
           return new Paystack;