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import React, { useState, useEffect } from 'react';
import { Link, Typography } from '@material-ui/core';
import axios from 'axios';
import ReactMarkdown from 'react-markdown';
import emoji from 'remark-gemoji';
import CodeBlock from './CodeBlock';
import InlineCode from './InlineCode';
import Heading from './Heading';
import Image from './Image';
interface PropTypes {
data?: string;
url?: string;
context?: any;
}
const resolveUrls = (line: string, baseUrl: string): string => line.replace(
/src="(?!http)(.*)"[\s>]/,
(match, url) => `src="${baseUrl}/${url}?sanitize=true"`,
).replace(
/\[(.*\]?.*)\]\((?!http)(.+?)\)/g,
(match, text, url) => `[${text}](${baseUrl}/${url})`,
);
const Markdown: React.FC<PropTypes> = ({ data, url, context = {} }) => {
const [markdown, setMarkdown] = useState<string>(data || '');
if (url) axios.get(url).then(response => setMarkdown(response.data));
useEffect(() => {
if (!url) setMarkdown(data || '');
}, [data, url]);
const baseUrl = url?.slice(0, url.lastIndexOf('/')) || '';
const sanitized = resolveUrls(markdown, baseUrl);
const renderers = {
heading: Heading,
inlineCode: InlineCode,
link: Link,
image: Image,
code: ({ language, value }: any) => {
if (language === 'react') return context[value] || null;
return CodeBlock({ value });
},
};
return (
<Typography>
<ReactMarkdown
source={sanitized}
renderers={renderers}
plugins={[emoji]}
allowDangerousHtml
/>
</Typography>
);
};
export default Markdown;
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