Plank\Mediable\MediaUploader::import PHP Method

    public function import($disk, $directory, $filename, $extension)
    {
        $disk = $this->verifyDisk($disk);
        $storage = $this->filesystem->disk($disk);
        $model = $this->makeModel();
        $model->disk = $disk;
        $model->directory = $directory;
        $model->filename = $filename;
        $model->extension = $this->verifyExtension($extension);
        if (!$storage->has($model->getDiskPath())) {
            throw FileNotFoundException::fileNotFound($model->getDiskPath());
        }
        $model->mime_type = $this->verifyMimeType($storage->mimeType($model->getDiskPath()));
        $model->aggregate_type = $this->inferAggregateType($model->mime_type, $model->extension);
        $model->size = $this->verifyFileSize($storage->size($model->getDiskPath()));
        $model->save();
        return $model;
    }