<?php

namespace Kirby\Cms;

use Kirby\Http\Url as BaseUrl;
use Kirby\Toolkit\Str;

/**
 * Extension of the Kirby\Http\Url class
 * with a specific Url::home method that always
 * creates the correct base Url and a template asset
 * Url builder.
 */
class Url extends BaseUrl
{
    public static $home = null;

    /**
     * Returns the Url to the homepage
     *
     * @return string
     */
    public static function home(): string
    {
        return App::instance()->url();
    }

    /**
     * Creates an absolute Url to a template asset if it exists. This is used in the `css()` and `js()` helpers
     *
     * @param string $assetPath
     * @param string $extension
     * @return string|null
     */
    public static function toTemplateAsset(string $assetPath, string $extension)
    {
        $kirby = App::instance();
        $page  = $kirby->site()->page();
        $path  = $assetPath . '/' . $page->template() . '.' . $extension;
        $file  = $kirby->root('assets') . '/' . $path;
        $url   = $kirby->url('assets') . '/' . $path;

        return file_exists($file) === true ? $url : null;
    }
}