SilverStripe 3.1.x Fetch and Save Vimeo Thumbnail on DataObject from given Vimeo Video ID

SS-Save-Vimeo-Thumbnail

    protected function onBeforeWrite() {

        //Do we have a vimeo video ID?  If so, we need to grab the Vimeo thumbnail
        //...but we only want to do this if either of the following conditions are true:
        //1) A VimeoVideoID has been entered into the CMS and we don't have a thumbnail yet, or
        //2) The VimeoVideoID entered has changed since this Article was last saved
        if(($this->VimeoVideoID && !$this->TutorialCustomThumbnailID)
            || (isset($this->original['VimeoVideoID']) && ($this->VimeoVideoID != $this->original['VimeoVideoID']))) {

            //Let's deal with the exceptional case first.  Perhaps the content editor is removing the VimeoVideoID.
            //If that is the case, we should detach the thumbnail from the record.
            if(!$this->VimeoVideoID) {
                $this->TutorialCustomThumbnailID = 0;
                $this->IncludeTutorialVideo = false;
            } else {

                //get the xml data about the video from Vimeo using the Vimeo Simple API
                $xml = simplexml_load_file('http://vimeo.com/api/v2/video/'.$this->VimeoVideoID.'.xml');

                //Grab the URL of the video thumbnail
                $xml_pic = $xml->video->thumbnail_medium;

                //get the extension of the image - we will need it later
                $ext = pathinfo($xml_pic, PATHINFO_EXTENSION);

                //get the image data
                $image = file_get_contents($xml_pic);

                //write the image to the filesystem
                $folder = Folder::find_or_make('/Uploads/Tutorial-Video-Thumbnails/');
                file_put_contents(ASSETS_PATH . '/Uploads/Tutorial-Video-Thumbnails/'.$this->VimeoVideoID.'-medium.'.$ext, $image);

                //set our thumbnail image filename
                $filename = ASSETS_DIR . '/Uploads/Tutorial-Video-Thumbnails/'.$this->VimeoVideoID.'-medium.'.$ext;

                //check if a record already exists for this image filename in the database.
                //If one already exists, then we can just use it - no need to create another image entry in the db.
                if($vimeoThumbnail = Image::get()->filter(array('Filename' => $filename))->first()) {
                    $this->TutorialCustomThumbnailID = $vimeoThumbnail->ID;
                } else {
                    //create a new Image DataObject with the details of this new image and save record to database
                    $vimeoThumbnail = new Image();
                    $vimeoThumbnail->Filename = ASSETS_DIR . '/Uploads/Tutorial-Video-Thumbnails/'.$this->VimeoVideoID.'-medium.'.$ext;
                    $vimeoThumbnail->Title = $this->VimeoVideoID.'-medium';
                    $vimeoThumbnail->ParentID = $folder->ID;
                    $vimeoThumbnail->write();

                    $this->TutorialCustomThumbnailID = $vimeoThumbnail->ID;
                }


            }


        }


        parent::onBeforeWrite();
    }