1 files changed, 24 insertions, 14 deletions
diff --git a/index.ts b/index.ts
index eadab52..13b6e9f 100644
--- a/index.ts
+++ b/index.ts
@@ -18,6 +18,27 @@ function splitPostHeader(postData: string): [string, string] {
 
 await fs.rm("build", { recursive: true });
 await fs.mkdir("build");
+declare interface PostMetadata {
+  name: string;
+  unlisted?: boolean;
+  tags?: Array<string>;
+  description?: string;
+}
+
+const baseTemplate = await fs.readFile("template.html", { encoding: "utf-8" });
+
+function 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}`,
+  );
+}
 
 for (let postPath of posts) {
   const totalPostPath = `posts/${postPath}`;
@@ -27,19 +48,8 @@ for (let postPath of posts) {
   }
   const postText = await fs.readFile(totalPostPath, { encoding: "utf-8" });
   const [postHeader, postBody] = splitPostHeader(postText);
-  const postMetadata = yaml.parse(postHeader);
-  const converter = new showdown.Converter();
-  const htmlBody = converter.makeHtml(postBody);
-
-  const primitiveHtmlDocument = `
-<html>
-    <head>
-        <title>${postMetadata.name}</title>
-    </head>
-    <body>
-        ${htmlBody}
-    </body>
-</html>`;
+  const postMetadata = yaml.parse(postHeader) as PostMetadata;
+  const postHtml = makeHtmlForPost(postMetadata, postBody);
   const targetPath = `build/${postPath.replace(".md", ".html")}`;
-  fs.writeFile(targetPath, primitiveHtmlDocument, { encoding: "utf-8" });
+  fs.writeFile(targetPath, postHtml, { encoding: "utf-8" });
 }