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import { readdirSync, readFileSync } from 'fs';
import { join } from 'path';
import { ReactNode } from 'react';
import ReactMarkdown from 'react-markdown';
import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
import rehypeRaw from 'rehype-raw';
import gfm from 'remark-gfm';
import Chapters, { chapter } from '../../components/chapters';
import Image from '../../components/image';
import Navbar, { MobileNavbar } from '../../components/navbar';
import Seperator from '../../components/seperator';
import Tags from '../../components/tag';
export interface ArticleMeta {
title?: string;
subtitle?: string;
author?: string;
tags?: Array<string>;
date?: string;
chapters?: Array<chapter>;
cover?: string;
id?: string;
}
var headingLevel = (input: string) => input?.match(/^[#]+/)[0]?.length || 0;
var sectionID = (input: string) =>
input
.replace(/[()\[\]{}!@#$%^&*<>?,./\;':"\\|=+]/g, '')
.replace(/\s/g, '-')
.toLowerCase();
function Heading(props: {
children?: ReactNode;
level?: number;
}) {
var HeadingTag = 'h' + props.level as keyof JSX.IntrinsicElements;
return <HeadingTag id={sectionID(props.children[0])} children={props.children} />;
}
function Code(props: {
className?: string;
children?: ReactNode;
}) {
var language = /language-(\w+)/.exec(props.className || '');
if (!language) return <code children={props.children} className={props.className} />;
return <SyntaxHighlighter
language={language[1]}
children={props.children.toString().trim()}
useInlineStyles={false}
PreTag='div'
style={{}}
/>;
}
export function RenderedArticle(props: { content: string; }) {
return <ReactMarkdown
rehypePlugins={[rehypeRaw]}
remarkPlugins={[gfm]}
children={props.content}
components={{
img: ({ node, ...props }) => <Image src={props.src as string} alt={props.alt as string} />,
hr: Seperator,
h1: Heading, // TODO: fix this garbage
h2: Heading,
h3: Heading,
h4: Heading,
h5: Heading,
h6: Heading,
code: Code,
}}
/>;
}
export default function Post(props: {
content: string;
meta: ArticleMeta;
}) {
return <div>
<div className='centeredPage'>
<div className='titleWrapper'>
<h1>{props.meta.title}</h1>
<p className='subtile'>{props.meta.subtitle}</p>
{props.meta.tags && <Tags tags={props.meta.tags} />}
</div>
<div className='navAreaWrapper'>
<div className='sticky'>
<Navbar />
<Chapters chapters={props.meta.chapters} />
</div>
</div>
<MobileNavbar />
<div className='contentWrapper'>
<RenderedArticle content={props.content} />
</div>
</div>
</div>;
}
var parseTag = {
'title': (val: string) => val,
'subtitle': (val: string) => val,
'author': (val: string) => val,
'cover': (val: string) => val,
'tags': (val: string) => val.split(',').map(i => i.trim()),
'date': (val: string) => new Date(val).toDateString(),
};
function parseMeta(file: Array<string>): ArticleMeta {
var meta: ArticleMeta = {};
file.forEach(line => {
if (!line.startsWith('[meta]: ')) return;
var tags = line.match(/\[meta\]:\s+\<(.+?)\>\s+\((.+?)\)/);
if (!tags || !tags[1] || !tags[2]) return;
if (!parseTag.hasOwnProperty(tags[1])) return;
meta[tags[1]] = parseTag[tags[1]](tags[2]);
});
return meta;
}
function parseToCRecursive(headings: Array<string>): Array<chapter> {
interface WIPchapter extends chapter {
unparsedChildren?: Array<string>;
}
var children: Array<WIPchapter> = [];
var lowestLevel = headingLevel(headings[0]);
var currentChildIndex = -1;
for (var i in headings) {
var localLevel = headingLevel(headings[i]);
if (localLevel == lowestLevel) {
var chapterName = headings[i].match(/^[#]+\s+(.+)/)[1];
children.push({
name: chapterName,
sectionLink: '#' + sectionID(chapterName),
unparsedChildren: [],
});
currentChildIndex += 1;
} else {
children[currentChildIndex].unparsedChildren.push(headings[i]);
}
}
children.map(child => {
child.children = parseToCRecursive(child.unparsedChildren);
delete child.unparsedChildren;
return child;
});
return children as Array<chapter>;
}
function parseToC(file: Array<string>): Array<chapter> {
var fileAsStr = file.join('\n');
fileAsStr = fileAsStr.replace(/```.*?```/gs, ''); // filter out code blocks from table of contents
var fileAsArr = fileAsStr.split('\n');
var chapterStrings = fileAsArr.filter(line => line.startsWith('#'));
return parseToCRecursive(chapterStrings);
}
function preprocessor(fileContent: string) {
var fileAsArr = fileContent.split('\n');
var meta = parseMeta(fileAsArr);
meta.chapters = parseToC(fileAsArr);
var result = fileAsArr.join('\n').trim();
return { meta, result };
}
export function getStaticProps(props: { params: { id: string; }; }) {
var filename = join('posts/', props.params.id + '.md');
var filecontent = readFileSync(filename).toString().trim();
var parsed = preprocessor(filecontent);
parsed.meta.id = props.params.id;
return {
props: {
content: parsed.result,
meta: parsed.meta,
},
};
}
export function getStaticPaths() {
var files = readdirSync('posts').filter(f => f.endsWith('.md'));
return {
paths: files.map((f) => {
return {
params: {
id: f.substr(0, f.length - 3),
},
};
}),
fallback: false,
};
}
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