From 0b93d9759d7f94378cc36c4d9838b2ade9ceb732 Mon Sep 17 00:00:00 2001
From: Shahar Talmi <shahar@wix.com>
Date: Fri, 25 Oct 2024 22:33:55 +0200
Subject: [PATCH] added server source code

---
 src/server/deno.js       |  3 ++
 src/server/deno.json     | 10 +++++
 src/server/deploy.sh     |  3 ++
 src/server/worker.js     | 95 ++++++++++++++++++++++++++++++++++++++++
 src/server/wrangler.toml |  8 ++++
 src/utils/urls.js        |  1 +
 6 files changed, 120 insertions(+)
 create mode 100644 src/server/deno.js
 create mode 100644 src/server/deno.json
 create mode 100755 src/server/deploy.sh
 create mode 100644 src/server/worker.js
 create mode 100644 src/server/wrangler.toml

diff --git a/src/server/deno.js b/src/server/deno.js
new file mode 100644
index 00000000..5c4729ae
--- /dev/null
+++ b/src/server/deno.js
@@ -0,0 +1,3 @@
+import worker from './worker.js';
+
+Deno.serve(worker.fetch);
diff --git a/src/server/deno.json b/src/server/deno.json
new file mode 100644
index 00000000..d64c4f5b
--- /dev/null
+++ b/src/server/deno.json
@@ -0,0 +1,10 @@
+{
+  "deploy": {
+    "project": "652c6edb-dacd-440a-845e-8ea175eddd31",
+    "exclude": [
+      "**/node_modules"
+    ],
+    "include": [],
+    "entrypoint": "deno.js"
+  }
+}
\ No newline at end of file
diff --git a/src/server/deploy.sh b/src/server/deploy.sh
new file mode 100755
index 00000000..e457b44d
--- /dev/null
+++ b/src/server/deploy.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+deployctl deploy --prod
+npx wrangler deploy
\ No newline at end of file
diff --git a/src/server/worker.js b/src/server/worker.js
new file mode 100644
index 00000000..871a99b3
--- /dev/null
+++ b/src/server/worker.js
@@ -0,0 +1,95 @@
+function cleanError(s) {
+  return s.match(/<h1>(.*)<\/h1>/)?.[1] || s;
+}
+
+function cleanAnswer(s) {
+  return s.match(/<article><p>([^.]*\.)/)?.[1] || s;
+}
+
+function cleanQuestion(s) {
+  return s.match(/(?<=<p>Your puzzle answer was <code>).*?(?=<\/code>)/g) || [];
+}
+
+async function downloadContent(url, session, postPayload) {
+  const headers = { Cookie: `session=${session}` };
+  const options = { headers };
+  if (postPayload) {
+    Object.assign(options, {
+      body: postPayload,
+      method: 'POST',
+    });
+    Object.assign(options.headers, {
+      'content-type': 'application/x-www-form-urlencoded',
+    });
+  }
+  const response = await fetch(url, options);
+  if (response.status >= 400) {
+    throw new Error(
+      [
+        `Failed to download from ${url} (${response.status})`,
+        `Description: ${cleanError(await response.text())}`,
+      ].join('\n'),
+    );
+  }
+  return await response.text();
+}
+
+async function getDayAnswer(year, day, session) {
+  const url = `https://adventofcode.com/${+year}/day/${+day}`;
+  return cleanQuestion(await downloadContent(url, session));
+}
+
+async function getDayInput(year, day, session) {
+  const url = `https://adventofcode.com/${+year}/day/${+day}/input`;
+  return await downloadContent(url, session);
+}
+
+async function submitDayAnswer(year, day, session, level, answer) {
+  const url = `https://adventofcode.com/${+year}/day/${+day}/answer`;
+  const postPayload = `level=${level}&answer=${encodeURIComponent(answer)}`;
+  return cleanAnswer(await downloadContent(url, session, postPayload));
+}
+
+async function respond(fn) {
+  try {
+    const body = await fn();
+    return new Response(
+      typeof body === 'string' ? body : JSON.stringify(body),
+      {
+        status: 200,
+        headers: { 'Access-Control-Allow-Origin': '*' },
+      },
+    );
+  } catch (e) {
+    return new Response(e.toString(), {
+      status: 500,
+      headers: { 'Access-Control-Allow-Origin': '*' },
+    });
+  }
+}
+
+export default {
+  async fetch(req) {
+    let match;
+    const session = new URL(req.url).searchParams.get('session');
+    match = new URLPattern({ pathname: '/input/:year/:day' }).exec(req.url);
+    if (req.method === 'GET' && match) {
+      const { year, day } = match.pathname.groups;
+      return respond(() => getDayInput(year, day, session));
+    }
+    match = new URLPattern({ pathname: '/question/:year/:day' }).exec(req.url);
+    if (req.method === 'GET' && match) {
+      const { year, day } = match.pathname.groups;
+      return respond(() => getDayAnswer(year, day, session));
+    }
+    match = new URLPattern({ pathname: '/answer/:year/:day' }).exec(req.url);
+    if (req.method === 'POST' && match) {
+      const { year, day } = match.pathname.groups;
+      const formData = await req.formData();
+      const level = formData.get('level');
+      const answer = formData.get('answer');
+      return respond(() => submitDayAnswer(year, day, session, level, answer));
+    }
+    return new Response('Not found', { status: 404 });
+  },
+};
diff --git a/src/server/wrangler.toml b/src/server/wrangler.toml
new file mode 100644
index 00000000..fe05d40e
--- /dev/null
+++ b/src/server/wrangler.toml
@@ -0,0 +1,8 @@
+#:schema node_modules/wrangler/config-schema.json
+name = "aoc"
+main = "worker.js"
+compatibility_date = "2024-10-22"
+compatibility_flags = ["nodejs_compat"]
+
+[observability]
+enabled = true
diff --git a/src/utils/urls.js b/src/utils/urls.js
index 28d51dcf..71bc9181 100644
--- a/src/utils/urls.js
+++ b/src/utils/urls.js
@@ -23,4 +23,5 @@ export const imports = {
 };
 
 // export const aocSolverServer = 'https://www.wix.com/_serverless/adventofcode';
+// export const aocSolverServer = 'https://aoc.shahar-talmi.workers.dev';
 export const aocSolverServer = 'https://aoc.deno.dev';