File watching and various tweaks

server/server.ts

@@ -6,24 +6,31 @@ import { oakCors } from "https://deno.land/x/cors@v1.2.0/mod.ts";
 import { readAll } from "https://deno.land/std@0.126.0/streams/mod.ts";
 import { exists } from "https://deno.land/std@0.126.0/fs/mod.ts";
 
+type NuggetMeta = {
+  name: string;
+  lastModified: number;
+};
+
 const fsPrefix = "/fs";
 const nuggetsPath = "../nuggets";
 
 const fsRouter = new Router();
 
-fsRouter.use(oakCors());
+fsRouter.use(oakCors({ methods: ["OPTIONS", "GET", "PUT", "POST"] }));
 
 fsRouter.get("/", async (context) => {
   const localPath = nuggetsPath;
-  let fileNames: string[] = [];
+  let fileNames: NuggetMeta[] = [];
   for await (const dirEntry of Deno.readDir(localPath)) {
     if (dirEntry.isFile) {
-      fileNames.push(
-        dirEntry.name.substring(
+      const stat = await Deno.stat(`${localPath}/${dirEntry.name}`);
+      fileNames.push({
+        name: dirEntry.name.substring(
           0,
           dirEntry.name.length - path.extname(dirEntry.name).length
-        )
-      );
+        ),
+        lastModified: stat.mtime?.getTime()!,
+      });
     }
   }
   context.response.body = JSON.stringify(fileNames);
@@ -33,7 +40,9 @@ fsRouter.get("/:nugget", async (context) => {
   const nuggetName = context.params.nugget;
   const localPath = `${nuggetsPath}/${nuggetName}.md`;
   try {
+    const stat = await Deno.stat(localPath);
     const text = await Deno.readTextFile(localPath);
+    context.response.headers.set("Last-Modified", "" + stat.mtime?.getTime());
     context.response.body = text;
   } catch (e) {
     context.response.status = 404;
@@ -46,7 +55,9 @@ fsRouter.options("/:nugget", async (context) => {
   try {
     const stat = await Deno.stat(localPath);
     context.response.headers.set("Content-length", `${stat.size}`);
+    context.response.headers.set("Last-Modified", "" + stat.mtime?.getTime());
   } catch (e) {
+    // For CORS
     context.response.status = 200;
     context.response.body = "";
   }
@@ -69,8 +80,10 @@ fsRouter.put("/:nugget", async (context) => {
   const text = await readAll(result.value);
   file.write(text);
   file.close();
+  const stat = await Deno.stat(localPath);
   console.log("Wrote to", localPath);
   context.response.status = existingNugget ? 200 : 201;
+  context.response.headers.set("Last-Modified", "" + stat.mtime?.getTime());
   context.response.body = "OK";
 });