From 053dde8e9d8cd41dd662bc8793f781877e2fcdb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Patrik=20Mokr=C3=BD?= <patrik.mokry@saxana.sk>
Date: Sun, 27 Feb 2022 20:32:41 +0100
Subject: [PATCH] implement facebook conversion api

---
 composer.json                        |  4 +-
 resources/config/facebook-pixel.php  |  4 ++
 src/LaravelFacebookConversionApi.php | 86 ++++++++++++++++++++++++++--
 3 files changed, 88 insertions(+), 6 deletions(-)

diff --git a/composer.json b/composer.json
index c366eaa..4e3639f 100755
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
   },
   "autoload": {
     "psr-4": {
-      "WebLAgence\\LaravelFacebookPixel\\": "src"
+      "MokryPatrik\\LaravelFacebookConversionApi\\": "src"
     }
   },
   "scripts": {
@@ -41,7 +41,7 @@
         "MokryPatrik\\LaravelFacebookConversionApi\\LaravelFacebookConversionApiServiceProvider"
       ],
       "aliases": {
-        "LaravelFacebookPixel": "WebLAgence\\LaravelFacebookPixel\\LaravelFacebookPixelFacade"
+        "LaravelFacebookPixel": "MokryPatrik\\LaravelFacebookConversionApi\\LaravelFacebookConversionApiFacade"
       }
     }
   },
diff --git a/resources/config/facebook-pixel.php b/resources/config/facebook-pixel.php
index 4e63ce2..d354478 100644
--- a/resources/config/facebook-pixel.php
+++ b/resources/config/facebook-pixel.php
@@ -6,6 +6,10 @@
      */
     'facebook_pixel_ids' => [],
     
+    'facebook_conversion_api_access_token' => '',
+
+    'test_event_code' => false,
+
     /*
      * Enable or disable script rendering. Useful for local development.
      */
diff --git a/src/LaravelFacebookConversionApi.php b/src/LaravelFacebookConversionApi.php
index 1223928..7bd49ca 100644
--- a/src/LaravelFacebookConversionApi.php
+++ b/src/LaravelFacebookConversionApi.php
@@ -2,6 +2,10 @@
 
 namespace MokryPatrik\LaravelFacebookConversionApi;
 
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\ClientException;
+use GuzzleHttp\Exception\GuzzleException;
+use Illuminate\Support\Facades\Request;
 use Illuminate\Support\Traits\Macroable;
 use JsonException;
 
@@ -14,7 +18,7 @@ class LaravelFacebookConversionApi
     use Macroable;
 
     /**
-     * @var string
+     * @var array
      */
     protected $id;
     
@@ -36,9 +40,9 @@ public function __construct($id)
     /**
      * Return the Facebook Pixel id.
      *
-     * @return string
+     * @return array
      */
-    public function getId(): string
+    public function getId(): array
     {
         return $this->id;
     }
@@ -93,7 +97,9 @@ public function bodyContent(): string
         $pixelCode = '';
         foreach ($facebookPixelSession as $key => $facebookPixel) {
             $params = json_encode($facebookPixel["parameters"], JSON_THROW_ON_ERROR);
-            $pixelCode .= "fbq('track', '" . $facebookPixel["name"] . "', " . $params . ");";
+            $eventId = uniqid($facebookPixel["name"], true);
+            $pixelCode .= "fbq('track', '" . $facebookPixel["name"] . "', " . $params . ", {eventID: '" . $eventId . "'});";
+             $this->conversionApiRequest($facebookPixel["name"], $eventId, $facebookPixel["parameters"]);
         }
         session()->forget('facebookPixelSession');
         return "<script>" . $pixelCode . "</script>";
@@ -114,4 +120,76 @@ public function createEvent(string $eventName, array $parameters = []): void
         $facebookPixelSession[] = $facebookPixel;
         session(['facebookPixelSession' => $facebookPixelSession]);
     }
+
+    /**
+     * @param $eventName
+     * @param $eventId
+     * @param $params
+     *
+     * @throws GuzzleException
+     */
+    private function conversionApiRequest($eventName, $eventId, $params): void
+    {
+        if (isset($params['content_category']) && is_array($params['content_category'])) {
+            $params['content_category'] = implode(',', $params['content_category']);
+        }
+        $data = [
+            'data' => [
+                [
+                    'event_name' => $eventName,
+                    'event_id' => $eventId,
+                    'event_time' => time(),
+                    'event_source_url' => Request::url(),
+                    'action_source' => 'website',
+                    'user_data' => $this->getUserData(),
+                    'custom_data' => $params,
+                ]
+            ]
+        ];
+        
+        if (config('facebook-pixel.test_event_code')) {
+            $data['test_event_code'] = config('facebook-pixel.test_event_code');
+        }
+        $data['access_token'] = config('facebook-pixel.facebook_conversion_api_access_token');
+
+        foreach ($this->getId() as $id) {
+            $endpoint = sprintf(
+                'https://graph.facebook.com/v13.0/%s/events',
+                $id
+            );
+
+            try {
+                $client = new Client();
+                 $client->request(
+                    'POST',
+                    $endpoint,
+                    [
+                        'headers' => ['Content-type' => 'application/json'],
+                        'body' => json_encode($data,JSON_THROW_ON_ERROR)
+                    ]
+                );
+            } catch (ClientException | JsonException $e) {}
+        }
+    }
+
+    /**
+     * @return array
+     */
+    private function getUserData(): array
+    {
+        $data =  [
+            'client_ip_address' => Request::ip(),
+            'client_user_agent' => Request::userAgent(),
+        ];
+        
+        if (Request::cookie('_fbc')) {
+            $data['fbc'] = Request::cookie('_fbc');
+        }
+
+        if (Request::cookie('_fbp')) {
+            $data['fbp'] = Request::cookie('_fbp');
+        }
+        
+        return $data;
+    }
 }