Hook for creating pdf from link

[Evgeny]

Hello,

I want make hook, after InvoicePaid by hand (bank invoice) i generate some html table page with stamp, whis page available only for customers and require login in clientarea.

Pdf generation work by link:         

If this link in clientarea pdf created blank

$url = 'https://domain.tld/whmcs/index.php?m=receipt&id=6750;

If url for some page as example

$url = 'https://domain.tld/123.php;

it generate good.

<?php
use WHMCS\Database\Capsule;
use TCPDF;

if (!defined("WHMCS")) {
    die("This file cannot be accessed directly");
}

add_hook('InvoicePaid', 1, function($vars) {

    logActivity('Starting InvoicePayment hook for Invoice ID: ' . $vars['invoiceid']);

    if ($invoice->paymentmethod == 'bankinvoice') {
        logActivity('Manual payment detected for Invoice ID: ' . $vars['invoiceid']);

        $invoiceId = $vars['invoiceid'];

        $invoice = Capsule::table('tblinvoices')->where('id', $invoiceId)->first();

        if ($invoice) {
            logActivity('Invoice found for Invoice ID: ' . $invoiceId);

            $client = Capsule::table('tblclients')->where('id', $invoice->userid)->first();

            if ($client) {
                logActivity('Client data retrieved for Client ID: ' . $invoice->userid);

                require_once '/var/www/vhosts/domain.tld/whmcs/vendor/tecnickcom/tcpdf/tcpdf.php';


                $pdf = new TCPDF();
                $pdf->SetCreator(PDF_CREATOR);
                $pdf->SetAuthor('Your Company');
                $pdf->SetTitle('Invoice ' . $invoiceId);
                $pdf->SetSubject('Invoice PDF');

                $pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, 'Invoice', 'Your Company');

                $pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
                $pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));

                $pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

                $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
                $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
                $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);

                $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

                $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

                $pdf->AddPage();

                $url = 'https://domain.tld/whmcs/index.php?m=receipt&id=' . $invoiceId;

                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $url);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_POST, 1);
                curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
                    'username' => $client->email,
                    'password' => $client->password
                ]));
                curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
                curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
                $html = curl_exec($ch);

                if (curl_errno($ch)) {
                    logActivity('cURL error: ' . curl_error($ch));
                } else {
                    logActivity('cURL request successful for Invoice ID: ' . $invoiceId);
                }

                curl_close($ch);

                $pdf->writeHTML($html, true, false, true, false, '');

                $uploadsDir = __DIR__ . '/../../uploads/';
                $pdfFilePath = $uploadsDir . 'Invoice_' . $invoiceId . '.pdf';

                $pdf->Output($pdfFilePath, 'F');

                logActivity('PDF generated and saved successfully for Invoice ID: ' . $invoiceId);

                echo 'PDF generated successfully. <a href="' . $pdfFilePath . '">Download PDF</a>';
            } else {
                logActivity('Client data not found for Client ID: ' . $invoice->userid);
            }
        } else {
            logActivity('Invoice not found for Invoice ID: ' . $invoiceId);
        }
    } else {
        logActivity('Non-manual payment detected for Invoice ID: ' . $vars['invoiceid']);
    }
});

I mark the invoice as paid manually in the admin panel. Apparently, authorization is not working correctly. How can I make it request data from the user, the account owner?

[DennisHermannsen]

The code running in the hooks isn't run by an authenticated user. It won't be able to access a URL that requires the user to be logged in, unless you log in. Unless you know the password of the client, you can't login as them.

[Evgeny]

Ok, i need to make request by admin (api) user

I try use this link

https://domain.tld/whmcs/admin/addonmodules.php?module=mymodule&action=printpage&id=10310&username=admin&password=MyPass&accesskey=mykey

But it redirect to admin login page. How i can make request to access this page. If i logged in admin area it working, but i need to make request from hook with admin login and password.

&username=admin&password=MyPass&accesskey=mykey

i find it Access Control - WHMCS Developer Documentation but it not working for me.

[Evgeny]

In general, I need to launch a link from my personal account or through the admin panel by specifying the user parameters, I did not find examples of how to do this by specifying the username and password to execute the link. I would be very glad if you share

This link 

https://domain.tld/whmcs/admin/addonmodules.php?module=mymodule&action=printpage&id=10310

or this link

https://domain.tld/whmcs/index.php?m=mymodule&id=10310

from an authorized user.  Is it possible to somehow pass these parameters in a link or what options are there?

[DennisHermannsen]

You aren't authenticated in your hooks.  The hooks aren't running as you - they're running as the system. WHMCS doesn't offer a native way of logging in as an admin in a hook.

If you just want to download the invoice, you can include /includes/invoicefunctions.php and run the pdfInvoice($invoiceId) function.

 

[Evgeny]

got it, did it differently, placed the php file in callback folder with include to module and add access with token. 

Thank you for your consultation.