Download kindle my clippings file and parse them

gistfile1.txt

class MyClippings extends Shortcode {
    public $name = "my-clippings";
    static $clippings;
    static function load_clippings() {
        if( ! self::$clippings ) {
            self::$clippings = file_get_contents( "https://drive.google.com/uc?export=download&id=[SOME FILE ID FROM Gdrive]" );
        }
    }
    function process( $filter ) {
        self::load_clippings();
        $items = explode( "==========", self::$clippings );
        $highlights = array();
        foreach ($items as $index => $item) {
            $item = trim( $item );
            $lines = explode( "\n", $item );
            if( stristr( $lines[ 0 ], $filter ) ) {
                $highlight = implode( "<br/>", array_slice( $lines, 3 ) );
                $highlight = str_replace( "<br>", "<br/>", $highlight );
                $highlight = strip_tags( $highlight, "<br/>" );
                $highlight = htmlentities( $highlight );
                $highlights[] = "<li>".$highlight."</li>";
            }
        }
        $highlights=implode( "\n", $highlights );

$output = "<ul>
${highlights}
</ul>";
    return $output;
    }
}