Add PayPal webhook handler and marketing styles

- Implemented PayPal webhook for handling payment notifications, including signature verification and transaction updates.
- Created invoice generation and license management for software upgrades upon successful payment.
- Added comprehensive logging for debugging purposes.
- Introduced new CSS styles for the marketing file management system, including layout, toolbar, breadcrumb navigation, search filters, and file management UI components.

assets/functions.php

@@ -1353,6 +1353,47 @@ function ioAPIv2($api_call, $data, $token){
   return $resp;
 }
 
+//------------------------------------------
+// API TO API version 2 File Upload
+//------------------------------------------
+function ioAPIv2_FileUpload($api_call, $fileData, $additionalData = [], $token = '') {
+    include dirname(__FILE__,2).'/settings/settings_redirector.php';
+    
+    $url = $baseurl . $api_call;
+    
+    $curl = curl_init($url);
+    curl_setopt($curl, CURLOPT_URL, $url);
+    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+    curl_setopt($curl, CURLOPT_POST, true);
+    
+    // Prepare headers (no Content-Type for multipart uploads)
+    if ($token != '') {
+        $headers = array("Authorization: Bearer $token");
+    } else {
+        $headers = array();
+    }
+    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
+    
+    // Merge file data with additional data
+    $postData = array_merge($fileData, $additionalData);
+    curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
+
+    $resp = curl_exec($curl);
+    $http_status = curl_getinfo($curl) ?? '200';
+    curl_close($curl);
+
+    if ($http_status['http_code'] == '403' || $http_status['http_code'] == '400') {
+        $resp = json_encode('NOK');
+    }
+    
+    if (debug){
+      $message = $date.';'.$api_call;
+      debuglog($message);
+    }
+
+    return $resp;
+}
+
 //------------------------------------------
 // DEFINE WHERECLAUSE BASED ON ACCOUNTHIERARCHY ALL
 //------------------------------------------
@@ -1491,7 +1532,12 @@ function getProfile($profile, $permission){
         'com_log' => 'U',
         'software_update' => 'R',
         'software_download' => 'R',
-        'software_available' => 'R'
+        'software_available' => 'R',
+        'marketing_files' => 'CRUD',
+        'marketing_folders' => 'CRUD',
+        'marketing_tags' => 'CRUD',
+        'marketing_upload' => 'CRUD',
+        'marketing_delete' => 'CRUD'
     ];
 
     // Group permissions: [granting_page => [collection => allowed_actions_string]]