hs2-last-updated: woohoo! it works i think!

deno.lock

@@ -159,7 +159,8 @@
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-    "https://deno.land/x/emit/mod.ts": "https://deno.land/x/emit@0.28.0/mod.ts"
+    "https://deno.land/x/emit/mod.ts": "https://deno.land/x/emit@0.28.0/mod.ts",
+    "https://deno.land/x/font_dir/mod.ts": "https://deno.land/x/font_dir@v0.1.0/mod.ts"
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@@ -449,6 +450,34 @@
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serverside/hs2-last-updated.ts

@@ -0,0 +1,117 @@
+// once a minute (what's the point if it's out of date!)
+// do days since last update (0 will be obvious then), should (please please please let this be true) only need three digits MAX
+// until hs2 ends of course but let's not think about that now
+// okay aaaa hs2 will end that will be sad and good i guess but
+// not important right now
+
+import { contentType } from "https://deno.land/std@0.202.0/media_types/mod.ts";
+import {
+  DOMParser,
+  NodeType,
+} from "https://deno.land/x/deno_dom@v0.1.38/deno-dom-wasm.ts";
+import {
+  Image,
+  TextLayout,
+} from "https://deno.land/x/imagescript@1.2.15/ImageScript.js";
+
+// not sure how worthwhile this optimization is but
+const dom_parser = new DOMParser();
+
+async function get_last_update_date(): Promise<Date | string> {
+  try {
+    const res = await fetch("https://homestuck2.com/log");
+    const body = await res.text();
+    if (!body) return "couldn't get a string body";
+
+    // could just regex for the date lol
+    const doc = dom_parser.parseFromString(body, "text/html");
+    if (!doc) return "couldn't parse the body into the DOM";
+
+    const p = doc.querySelector("p");
+    if (!p) return "couldn't get a p from the doc";
+
+    // should really enable strict indexing
+    const us_date_node = p.childNodes[0];
+    if (!us_date_node || us_date_node.nodeType != NodeType.TEXT_NODE) {
+      return "couldn't get a date node from the log entry";
+    }
+
+    const us_date = us_date_node.textContent.replace(" - ", "");
+    // apparently doing new Date("10/8/2023") is implementation defined which is icky but it works with deno
+    const date = new Date(us_date);
+    if (Number.isNaN(date.valueOf())) {
+      return `got an invalid date :(. the text_content was '${us_date}'`;
+    }
+    return date;
+  } catch (e) {
+    return `caught error: ${e}`;
+  }
+}
+
+async function check_again() {
+  last_checked = new Date();
+
+  const new_date = await get_last_update_date();
+  if (typeof new_date == "string") {
+    console.log(`failed to get a date when checking 😬: '${new_date}'`);
+    console.log(
+      "^ ironically enough, this is more likely when there *is* an update",
+    );
+    console.log(
+      "^ unironically, this is *most* likely the result of a bug",
+    );
+    return;
+  }
+  last_updated = new_date;
+}
+
+function days_since_update(): number {
+  const millis = new Date().getTime() - last_updated.getTime();
+  return millis / (24 * 60 * 60 * 1000);
+}
+
+// silly, i know
+let last_updated: Date = new Date(0);
+let last_checked: Date = new Date();
+await check_again();
+
+// *definitely* a worthwhile optimization
+// (still inefficient to go over http...)
+const font = await fetch("https://static.pyrope.net/courier-std-bold.otf")
+  .then((r) => r.arrayBuffer())
+  .then((b) => new Uint8Array(b));
+
+function make_image(): Image {
+  const days = Math.floor(days_since_update()).toString().padStart(3, "0");
+  console.log(days_since_update());
+  const image = new Image(106, 44);
+  const text = Image.renderText(
+    font,
+    64,
+    days,
+    0x00_00_00_ff,
+    new TextLayout({ verticalAlign: "center", horizontalAlign: "middle" }),
+  );
+
+  return image.composite(text, -5);
+}
+
+async function update_image() {
+  image = await make_image().encode();
+}
+
+let image: Uint8Array = new Uint8Array();
+await update_image();
+
+Deno.serve({ port: 61264 }, async () => {
+  if (new Date().getTime() - last_checked.getTime() >= 60 * 1000) {
+    await check_again();
+    await update_image();
+  }
+
+  return new Response(image, {
+    headers: { "Content-Type": contentType("png") },
+  });
+});
+
+await Deno.writeFile("/tmp/poop.png", image);