From 484a396a6421205d329b9ad5698b94a2ac30a5b9 Mon Sep 17 00:00:00 2001
From: Alex Gleason <alex@alexgleason.me>
Date: Sat, 4 Mar 2023 20:19:57 -0600
Subject: [PATCH] Add /api/v1/instance

---
 src/api/instance.ts | 45 +++++++++++++++++++++++++++++++++++++++++++++
 src/app.ts          |  4 +++-
 src/config.ts       |  2 ++
 src/deps.ts         |  4 +++-
 4 files changed, 53 insertions(+), 2 deletions(-)
 create mode 100644 src/api/instance.ts
 create mode 100644 src/config.ts

diff --git a/src/api/instance.ts b/src/api/instance.ts
new file mode 100644
index 00000000..0b432b0f
--- /dev/null
+++ b/src/api/instance.ts
@@ -0,0 +1,45 @@
+import { LOCAL_DOMAIN, POST_CHAR_LIMIT } from '@/config.ts';
+
+import type { Context } from '@/deps.ts';
+
+function instanceController(c: Context) {
+  const { host } = new URL(LOCAL_DOMAIN);
+
+  return c.json({
+    uri: host,
+    title: 'Nostrverse',
+    description: 'An adapter between Mastodon API and Nostr.',
+    short_description: 'An adapter between Mastodon API and Nostr.',
+    registrations: false,
+    max_toot_chars: POST_CHAR_LIMIT,
+    configuration: {
+      media_attachments: {
+        image_size_limit: 100000000,
+        video_size_limit: 100000000,
+      },
+      polls: {
+        max_characters_per_option: 0,
+        max_expiration: 0,
+        max_options: 0,
+        min_expiration: 0,
+      },
+      statuses: {
+        max_characters: POST_CHAR_LIMIT,
+        max_media_attachments: 20,
+      },
+    },
+    languages: ['en'],
+    stats: {
+      domain_count: 0,
+      status_count: 0,
+      user_count: 0,
+    },
+    urls: {
+      streaming_api: `wss://${host}`,
+    },
+    version: '0.0.0 (compatible; Nostrverse 0.0.1)',
+    rules: [],
+  });
+}
+
+export default instanceController;
diff --git a/src/app.ts b/src/app.ts
index 77d78833..2e2445ce 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,7 +1,9 @@
 import { Hono } from '@/deps.ts';
 
+import instanceController from './api/instance.ts';
+
 const app = new Hono();
 
-app.get('/', (c) => c.text('Hono!'));
+app.get('/api/v1/instance', instanceController);
 
 export default app;
diff --git a/src/config.ts b/src/config.ts
new file mode 100644
index 00000000..cedd9045
--- /dev/null
+++ b/src/config.ts
@@ -0,0 +1,2 @@
+export const LOCAL_DOMAIN = Deno.env.get('LOCAL_DOMAIN') || 'http://localhost:8000';
+export const POST_CHAR_LIMIT = Number(Deno.env.get('POST_CHAR_LIMIT') || 5000);
diff --git a/src/deps.ts b/src/deps.ts
index b0af16e8..0925d11f 100644
--- a/src/deps.ts
+++ b/src/deps.ts
@@ -1 +1,3 @@
-export { Hono } from 'https://deno.land/x/hono@v3.0.2/mod.ts';
+import { Context, Hono } from 'https://deno.land/x/hono@v3.0.2/mod.ts';
+export { Hono };
+export type { Context };