Rename file upload from Channel Form

Question

I'm using:

{field:my-field-name}

to display my file upload form in Channel Forms to allow the user to upload a file.

I want to be able to change the filename and append their user ID to it but can't figure out how...the EE documentation doesn't provide any clues either.

Any thoughts?

Thanks, Dan

Answer 1

You'll need to write an extension which uses the file_after_save hook. This hook passes you the $file_id and an array of info about the file called $data. Using this info you should be able update the file name doing something like this in your extension:

function file_after_save($file_id, $data)
{
    $parts = pathinfo($data['file_name']);
    $new_file_name =
        $parts['filename'].
        '_foobar_'. // whatever you want to add to the filename
        $data['uploaded_by_member_id'].
        '.'.$parts['extension'];

    ee()->load->library('filemanager');
    ee()->filemanager->rename_file($file_id, $new_file_name, true);
}