Looks like trivial modfication...
1. modify pictureUpload function in ProductController.php
2. modify 1 backoffice twig file to display the link with name of uploaded file like test.pdf -> because there will be no thumbnail from such a pdf file so Prestashop will not display it in order product details.
I will write a complete tutorial in my free time.
It's trivial modfication...
Just add an additional mime type 'application/pdf' and add the extension 'pdf' in the validation function and slightly modify 1 backoffice file to display the link with name of uploaded file like test.pdf -> because there will be no thumbnail from such a pdf file so Prestashop will not display it in order product details.
I will write a complete tutorial in my free time.
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