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import { ReactNode } from 'react';
import ReactMarkdown from 'react-markdown';
import { readdirSync, readFileSync } from 'fs';
import { join } from 'path';
import Seperator from '../../components/seperator';
import Navbar from '../../components/navbar';
// import Button from '../../components/button';
import Image from '../../components/image';
import Chapters, { chapter } from '../../components/chapters';
interface ArticleMeta {
title?: string;
subtitle?: string;
author?: string;
tags?: Array<string>;
date?: string;
chapters?: Array<chapter>;
}
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].props.children)} children={props.children}/>
}
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>
</div>
<div className="navAreaWrapper">
<div className="sticky">
<Navbar/>
<Chapters chapters={props.meta.chapters}/>
</div>
</div>
<div className="contentWrapper">
<ReactMarkdown
children={props.content}
renderers={{
image: Image,
thematicBreak: Seperator,
heading: Heading,
}}/>
</div>
</div>
</div>
}
var parseTag = {
"title": (val: string) => val,
"subtitle": (val: string) => val,
"author": (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 chapterStrings = file.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);
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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