From 5678bb53d4325e99bad7f8afa3bc194903c0b5ef Mon Sep 17 00:00:00 2001
From: Ariful Islam <arif98741@gmail.com>
Date: Tue, 20 Jun 2023 22:47:51 +0600
Subject: [PATCH] feat: Added Verify Payment Functionality

---
 composer.json      |  3 ++-
 readme.md          | 47 ++++++++++++++++++++++++++++++++++++++++++----
 src/Paystation.php | 25 ++++++++++++++++++++++--
 3 files changed, 68 insertions(+), 7 deletions(-)

diff --git a/composer.json b/composer.json
index 39f94c6..5fa2368 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,8 @@
         "guzzlehttp/guzzle": "^6.3|^7.2",
         "php": ">=7.3",
         "ext-curl": "*",
-        "ext-mbstring": "*"
+        "ext-mbstring": "*",
+        "ext-json": "*"
     },
     "autoload": {
         "psr-4": {
diff --git a/readme.md b/readme.md
index eb2aaa6..41512f1 100644
--- a/readme.md
+++ b/readme.md
@@ -6,9 +6,8 @@ xenon/paystation is a php library for Bangladeshi  payment gateway provider. You
 ```
 composer require xenon/paystation
 ```
-
-### Sample Code
-
+# Sample Code
+## Step:1  Create Payment and Redirect to Payment Url
 <pre>
 
 use Xenon\Paystation\Exception\PaystationPaymentParameterException;
@@ -34,17 +33,57 @@ try {
         'callback_url' => "http://www.yourdomain.com/success.php",
         // 'checkout_items' => "orderItems"
     ]);
-    $pay->payNow();
+    $pay->payNow(); //will automatically redirect to gateway payment page
 } catch (Exception $e) {
     var_dump($e->getMessage());
 }
+</pre>
+
+## Step:2 Verify Payment 
+<pre>
+ $config = [
+    'merchantId' => 'xxx',
+    'password' => 'xxxx'
+ ];
+$pay = new Paystation($config);
+$status  = $pay->verifyPayment("invoice_number","trx_id"); //this will retrieve response as json
+</pre>
 
+### sample json response for transaction verification(Success)
+<pre>
+    {
+        "status_code": "200",
+        "status": "success",
+        "message": "Transaction found",
+        "data": {
+            "invoice_number": "ddsf648feebc415138XXXXX",
+            "trx_status": "Success",
+            "trx_id": "AFJ7IXXX",
+            "payment_amount": 1,
+            "order_date_time": "2023-06-19 11:57:04",
+            "payer_mobile_no": "01750XXXX",
+            "payment_method": "bKash",
+            "reference": "102030",
+            "checkout_items": null,
+            "cust_phone": "01700000001"
+        }
+    }
+</pre>
+
+### sample json response for transaction verification(Failed)
+<pre>
+{
+    "status_code": "1006",
+    "status": "failed",
+    "message": "Transaction not found in system"
+}
 </pre>
 
 
 #### Important Methods
 * setPaymentParams()
 * payNow()
+* verifyPayment()
 
 This library is still in beta version and if you are interested to contribute this , we highly encourage you. Make a fork of this repository
 and give send a pull request. If you face any issues or error during development or after deployment, you should crate an issue
diff --git a/src/Paystation.php b/src/Paystation.php
index 4896cad..43770d5 100644
--- a/src/Paystation.php
+++ b/src/Paystation.php
@@ -17,7 +17,7 @@ class Paystation
     private array $paymentParams = [];
 
     /**
-     * @param array $paymentParams
+     * @param array $config
      */
     public function __construct(array $config)
     {
@@ -44,6 +44,8 @@ public function getConfig(): array
     }
 
     /**
+     * @return void
+     * @throws PaystationException
      * @throws PaystationPaymentParameterException
      * @throws \JsonException
      */
@@ -53,6 +55,26 @@ public function payNow()
         $this->createPayment();
     }
 
+    /**
+     * This is verification payment for payment
+     * This will accept invoice_number and trx_id as argent parameters
+     * @return \GuzzleHttp\Psr7\Response
+     * @throws \JsonException|PaystationException
+     */
+    public function verifyPayment(string $invoiceNumber, string $transactionId)
+    {
+        $instance = PaystationPaymentRequest::getInstance();
+        $header = [
+            'token' => Token::getToken($this->config),
+        ];
+        $instance->setHeaders($header);
+        $params = [
+            'invoice_number' => $invoiceNumber,
+            'trx_id' => $transactionId
+        ];
+        $requestResponse = $instance->post('retrive-transaction', $header, $params);
+        return (new Response($requestResponse))->getJsonResponse();
+    }
 
     /**
      * @return void
@@ -110,7 +132,6 @@ private function validateParams()
             }
 
             throw new PaystationPaymentParameterException("Payment  parameter '$requiredParamsString' $string required. For better understanding visit https://www.paystation.com.bd/documentation/#create-request-parameters");
-
         }
     }