From fe9db7509d2acd5e5e722397d743a07e1eb1400f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A2u=20Cao?= <raucao@kosmos.org>
Date: Mon, 21 Oct 2024 00:29:53 +0200
Subject: [PATCH] Support pretty URLs for articles, redirect from naddr

---
 handlers/naddr.ts      | 18 ++++-------------
 handlers/user-event.ts | 45 ++++++++++++++++++++++++++++++++++++++++++
 main.ts                | 17 ++++++++++++++++
 3 files changed, 66 insertions(+), 14 deletions(-)
 create mode 100644 handlers/user-event.ts

diff --git a/handlers/naddr.ts b/handlers/naddr.ts
index cfd3ce7..4f708d6 100644
--- a/handlers/naddr.ts
+++ b/handlers/naddr.ts
@@ -1,27 +1,17 @@
 import { Context } from "@oak/oak";
 import { nip19 } from "@nostr/tools";
 import { log } from "../log.ts";
-import { articleHtml } from "../html.ts";
-import { fetchProfileEvent, fetchReplaceableEvent } from "../nostr.ts";
+import { lookupUsernameByPubkey } from "../ldap.ts";
 
 const naddrHandler = async function (ctx: Context) {
-  const { request } = ctx;
   const naddr = ctx.params.path;
 
   try {
     const r = nip19.decode(naddr);
-    const articleEvent = await fetchReplaceableEvent(
-      r.data.pubkey,
-      r.data.identifier,
-    );
-    const profileEvent = await fetchProfileEvent(r.data.pubkey);
-    let profile;
+    const username = await lookupUsernameByPubkey(r.data.pubkey);
 
-    if (articleEvent && profileEvent) {
-      const profile = JSON.parse(profileEvent.content);
-      const html = articleHtml(articleEvent, profile);
-
-      ctx.response.body = html;
+    if (username && r.data.identifier) {
+      ctx.response.redirect(`/@${username}/${r.data.identifier}`);
     } else {
       ctx.response.status = 404;
       ctx.response.body = "Not Found";
diff --git a/handlers/user-event.ts b/handlers/user-event.ts
new file mode 100644
index 0000000..b4675b9
--- /dev/null
+++ b/handlers/user-event.ts
@@ -0,0 +1,45 @@
+import { Context } from "@oak/oak";
+import { log } from "../log.ts";
+import { lookupPubkeyByUsername } from "../ldap.ts";
+import {
+  fetchProfileEvent,
+  fetchReplaceableEvent,
+} from "../nostr.ts";
+import { articleHtml } from "../html.ts";
+
+const userEventHandler = async function (ctx: Context) {
+  const username = ctx.params.user.replace(/^(@|~)/, "");
+  const identifier = ctx.params.identifier;
+  const pubkey = await lookupPubkeyByUsername(username);
+
+  if (!pubkey) {
+    ctx.response.status = 404;
+    ctx.response.body = "Not Found";
+    return;
+  }
+
+  try {
+    const articleEvent = await fetchReplaceableEvent(
+      pubkey,
+      identifier,
+    );
+    const profileEvent = await fetchProfileEvent(pubkey);
+    let profile;
+
+    if (articleEvent && profileEvent) {
+      profile = JSON.parse(profileEvent.content);
+      const html = articleHtml(articleEvent, profile);
+
+      ctx.response.body = html;
+    } else {
+      ctx.response.status = 404;
+      ctx.response.body = "Not Found";
+    }
+  } catch (e) {
+    log(e, "yellow");
+    ctx.response.status = 404;
+    ctx.response.body = "Not Found";
+  }
+};
+
+export default userEventHandler;
diff --git a/main.ts b/main.ts
index 2d374b8..140f12d 100644
--- a/main.ts
+++ b/main.ts
@@ -4,6 +4,7 @@ import naddrHandler from "./handlers/naddr.ts";
 import nprofileHandler from "./handlers/nprofile.ts";
 import npubHandler from "./handlers/npub.ts";
 import usernameHandler from "./handlers/username.ts";
+import userEventHandler from "./handlers/user-event.ts";
 
 const router = new Router();
 
@@ -29,6 +30,22 @@ router.get("/:path", async (ctx: ctx) => {
   );
 });
 
+router.get("/:user/:identifier", async (ctx: ctx) => {
+  const { user } = ctx.params;
+
+  if (user.startsWith("@") || user.startsWith("~")) {
+    await userEventHandler(ctx);
+  } else {
+    ctx.response.status = 404;
+    ctx.response.body = "Not Found";
+  }
+
+  log(
+    `${ctx.request.method} ${ctx.request.url} - ${ctx.response.status}`,
+    "gray",
+  );
+});
+
 const app = new Application();
 app.use(router.routes());
 app.use(router.allowedMethods());