feat: Implement invoice generation and emailing functionality

- Added invoice generation logic using DomPDF.
- Integrated invoice data retrieval from the API.
- Implemented language determination for invoices based on customer data.
- Added options to email invoices to customers and admin.
- Included HTML output option for direct viewing in the browser.
- Ensured proper redirection and error handling throughout the process.

histories.php

@@ -30,16 +30,16 @@ $url = 'index.php?page=histories'.$status.$search;
 //GET Details from URL
 $GET_VALUES = urlGETdetails($_GET) ?? '';
 //CALL TO API
-$api_url = '/v1/history/'.$GET_VALUES;
+$api_url = '/v2/history/'.$GET_VALUES;
 $responses = ioServer($api_url,'');
 //Decode Payload
-if (!empty($responses)){$responses = decode_payload($responses);}else{$responses = null;}
+if (!empty($responses)){$responses = json_decode($responses);}else{$responses = null;}
 
 //Return QueryTotal from API
-$api_url = '/v1/history/'.$GET_VALUES.'&totals=';
+$api_url = '/v2/history/'.$GET_VALUES.'&totals=';
 $query_total = ioServer($api_url,'');
 //Decode Payload
-if (!empty($query_total)){$query_total = decode_payload($query_total);}else{$query_total = null;}
+if (!empty($query_total)){$query_total = json_decode($query_total);}else{$query_total = null;}
 
 template_header('Histories', 'histories','view');
 $view = '
@@ -116,7 +116,7 @@ $view .= '
                 foreach ($responses as $response){
 
                 $description = json_decode($response->description) ?? $response->description;
-                $description = json_encode($description, JSON_PRETTY_PRINT); 
+                $description = json_encode($description, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); 
                 //Replace JSON ITEMS
                 $search = ['{', '}', '"',':','[',']',','];
                 $replace   = ['', '','','=','','',''];