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import showdown from "showdown";
import yaml from "yaml";
import { promises as fs } from "fs";
function splitPostHeader(postData: string): [string, string] {
if (postData.startsWith("---\n")) {
const headerEndIndex = postData.indexOf("\n---\n", 4);
return [
postData.substring(4, headerEndIndex),
postData.substring(headerEndIndex + 5),
];
}
return ["", postData];
}
declare interface PostMetadata {
name: string;
unlisted?: boolean;
tags?: Array<string>;
description?: string;
}
declare interface PostEntry {
name: string;
id: string;
description: string | null;
}
const baseTemplate = await fs.readFile("template.html", { encoding: "utf-8" });
class PostCollector {
allPosts: PostEntry[] = [];
makeHtmlForPost(postMetadata: PostMetadata, markdown: string): string {
const converter = new showdown.Converter();
const htmlPostBody = converter.makeHtml(markdown);
const variables = {
postBody: htmlPostBody,
title: postMetadata.name,
};
return baseTemplate.replace(
/%([a-zA-Z]+)%/g,
(_, match) => variables[match] ?? `Missing variable: ${match}`,
);
}
async run() {
await fs.rm("build", { recursive: true });
await fs.mkdir("build");
await fs.mkdir("build/posts");
const posts = await fs.readdir("posts");
for (let postPath of posts) {
const totalPostPath = `posts/${postPath}`;
if (!postPath.endsWith(".md")) {
await fs.copyFile(totalPostPath, `build/posts/${postPath}`);
continue;
}
const postId = postPath.replace(".md", "");
const postText = await fs.readFile(totalPostPath, { encoding: "utf-8" });
const [postHeader, postBody] = splitPostHeader(postText);
const postMetadata = yaml.parse(postHeader) as PostMetadata;
const postHtml = this.makeHtmlForPost(postMetadata, postBody);
const targetPath = `build/posts/${postId}.html`;
await fs.writeFile(targetPath, postHtml, { encoding: "utf-8" });
if (!postMetadata.unlisted)
this.allPosts.push({
name: postMetadata.name,
id: postId,
description: postMetadata.description ?? null,
});
}
await fs.writeFile(
"build/posts/index.html",
this.makeHtmlForPost(
{ name: "Post Index" },
"# Post List\n" +
this.allPosts
.map(
(post) =>
`## [${post.name}](./${post.id}.html)\n\n${post.description ?? ""}`,
)
.join("\n"),
),
{ encoding: "utf-8" },
);
}
}
await new PostCollector().run();
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