HTML 与 Markdown 互相转换

引入以下工具进行 markdown 与 html 之间的转换.

1. league/html-to-markdown ，
2. erusev/parsedown

App\Http\Controllers\Traits\Markdown.php;

<?php
/**
 * Created by PhpStorm.
 * User: GucciLee
 * Date: 2019/3/4
 * Time: 14:41
 */

namespace App\Http\Controllers\Traits;

use League\HTMLToMarkdown\HtmlConverter;

trait Markdown
{
    /**
     * markdown -> html
     * @param $markdown
     * @return mixed
     */
    public function markdownToHtml($markdown)
    {
        // markdown to html
        $convertedHmtl = app('Parsedown')->setBreaksEnabled(true)->text($markdown);

        /** XSS 防注入 */
        $convertedHmtl = clean($convertedHmtl, 'markdown');

        // 代码高亮展示优化
        $convertedHmtl = str_replace("<pre><code>", '<pre><code class=" language-php">', $convertedHmtl);

        // 移除 {{}}
        // $convertedHmtl = remove_vue($convertedHmtl);

        // 返回 html
        return $convertedHmtl;
    }

    /**
     * html -> markdown;
     * @param $html
     * @return string
     */
    public function htmlToMarkdown($html)
    {
        $converter = new HtmlConverter(['header_style' => 'atx']);

        $converter->getConfig()->setOption('list_item_style', '*');

        return $converter->convert($html);
    }
}

其中有用到 XSS 防注入, 参考文章:
XSS 安全漏洞 - HTMLPurifier

App\Http\Controllers\ArticlesController.php

<?php
namespace App\Http\Controllers;
use App\Http\Controllers\Traits\Markdown;
.
.
.
class ArticlesController extends Controller{
    use Markdown;
    .
    .
    .
    public function show(Article $article)
    {
        // 转换markdown
        $article->body = $this->markdownToHtml($article->body);

        return view('pages.articles.show', compact('article'));
    }
    .
    .
    .
}

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