Implementing `previewUsing` to work on `attachExisting`

[marlocorridor]

We are using previewUsing to use a conversion file for preview.

But on "use existing" button, preview does not work.

We can't seem to find on documents and we are still looking at the source code. We reviewed the closed issues but still couldn't find a reference.

[marlocorridor]

MediaUploadingListItem.vue

  methods: {
    loadPreview() {
      if (this.media.isImage) { // could we change this
        this.preview = this.media.previewUrl
      } else {
        return
      }
    ...

      ...
      if (this.media.previewUrl) { // to this?
        this.preview = this.media.previewUrl
      } else {
        return
      }
    ...

[marlocorridor]

As of inspecting, previewUrl for attacheExisting is not using ->previewUsing('preview')

{
    "0": {
        "id": ...,
        "size": 13133,
        "mimeType": "application/pdf",
        "fileName": "sample-2.pdf",
        "collectionName": "",
        "extension": "pdf",
        "previewUrl": "http://127.0.0.1:9000/.../media/16fc12ce-e916-4e0f-bf65-21fd71b2f3bc/sample-2.pdf"
    }
}

[marlocorridor]

class AttachableMediaPresenter implements Arrayable
{
    private $media;

    public function __construct(Media $media)
    {
        $this->media = $media;
    }

    public function toArray(): array
    {
        return array_merge([
            'id' => $this->media->id,
            'size' => $this->media->size,
            'mimeType' => $this->media->mime_type,
            'fileName' => $this->media->file_name,
            'collectionName' => $this->media->collection_name,
            'extension' => $this->media->extension,
            'previewUrl' => $this->media->getFullUrl('preview'), // how could we pass the conversion value :)
        ]);
    }
}

[marlocorridor]

class AttachableMediaPresenter implements Arrayable
{
    ...
    public function toArray(): array
    {
        return array_merge([
            ...
            'previewUrl' => $this->media->getFullUrl('preview'), // how could we pass the conversion value :)
        ]);
    }
}

This seems to work, we just need to find where to get the conversion value

[marlocorridor]

[marlocorridor]

Preparing the pull request