Assign cover for PDF in the panel

The CMS Questions
1

I have created a plug-in to generate preview images of PDFs that are created in the panel during upload. Here is an example:

financialreport.pdf (-> template: pdf.yml)
financialreport.pdf.txt
financialreport.jpg (-> template: pdfcover.yml)
financialreport.jpg.txt

I use the preview image in the frontend for display. Both work perfectly.

In the panel, I would also like to use this image as a preview image to display the PDFs, as currently only the standard icon is displayed. Is that possible? I have not found a comparable solution for this in the forum.

screenshot
screenshot1224×594 49.5 KB

2

I am not 100% sure that there are no guards somewhere in between that would prevent this, but if you try to use File blueprint | Kirby CMS somehow reliably pointing the query suboption towards your generated JPG.

3

Thank you for your quick reply.
I had tried a plugin, but unfortunately no cover image is displayed in the panel.

<?php

Kirby::plugin('my/plugin', [
    'fileMethods' => [
        'customThumbnail' => function () {
            $jpg = $this->parent()->file($this->name() . '.jpg');
            return $jpg ? $jpg->url() : $this->icon();
        }
    ]
]);

Blueprint:

query: "{{ file.customThumbnail }}"
4

Needs to be

image:
  query: file.customThumbnail

and also the query should return a File or an Asset object, not a URL.

5

I have found a comparable solution here in the forum. However, this assumes that the name of the preview image is structured in this way:

image:
  query: file.siblings.findBy("name", file.filename)

financialreport.pdf.jpg
financialreport.pdf.jpg.txt

In my plugin, ‘.pdf’ is removed from the name of the JPG, so the query query does not work.

financialreport.jpg
financialreport.jpg.txt

I could change my plugin now, but then I would have to regenerate all PDF preview images. Therefore, it is probably easier to change the query query. But how?

6

Why are you giving up on your custom file method if that works for your naming scheme?

Kirby::plugin('my/plugin', [
    'fileMethods' => [
        'customThumbnail' => function () {
            return $this->parent()->file($this->name() . '.jpg');
        }
    ]
]);
1 Like
7

screenshot
screenshot1302×606 96 KB

The image preview now works with your modified plugin code.
Perfect! Many, many thanks!