From 1da9c7d144d2afe78f8ac00ac704dfad749d4d47 Mon Sep 17 00:00:00 2001
From: Adam Soltys <asoltys@gmail.com>
Date: Wed, 21 Dec 2022 15:48:14 -0800
Subject: add nostr message field to user profile page

---
 src/lib/utils.js                                  | 24 +++++++++
 src/routes/(app)/[username]/+page.server.js       |  9 +++-
 src/routes/(app)/[username]/+page.svelte          | 60 ++++++++++++++++++++++-
 src/routes/(app)/[username]/+server.js            |  6 +++
 src/routes/(app)/[username]/generate/+page.svelte | 27 ++--------
 5 files changed, 98 insertions(+), 28 deletions(-)
 create mode 100644 src/routes/(app)/[username]/+server.js

(limited to 'src')

diff --git a/src/lib/utils.js b/src/lib/utils.js
index f59b6359..14646ad0 100644
--- a/src/lib/utils.js
+++ b/src/lib/utils.js
@@ -1,3 +1,5 @@
+import * as ecc from 'tiny-secp256k1';
+import { BIP32Factory } from 'bip32';
 import { browser } from '$app/environment';
 import { toast } from '@zerodevx/svelte-toast';
 import { goto } from '$app/navigation';
@@ -168,3 +170,25 @@ export const wait = async (f, s = 300) => {
 	if (i >= s) throw new Error('timeout');
 	return f();
 };
+
+export const stretch = async (password, salt) =>
+	crypto.subtle.deriveKey(
+		{
+			name: 'PBKDF2',
+			salt,
+			iterations: 100000,
+			hash: 'SHA-256'
+		},
+		await crypto.subtle.importKey(
+			'raw',
+			new TextEncoder().encode(password),
+			{ name: 'PBKDF2' },
+			false,
+			['deriveBits', 'deriveKey']
+		),
+		{ name: 'AES-GCM', length: 256 },
+		true,
+		['encrypt', 'decrypt']
+	);
+
+export const bip32 = await BIP32Factory(ecc);
diff --git a/src/routes/(app)/[username]/+page.server.js b/src/routes/(app)/[username]/+page.server.js
index 01dfab5a..547f754f 100644
--- a/src/routes/(app)/[username]/+page.server.js
+++ b/src/routes/(app)/[username]/+page.server.js
@@ -1,14 +1,19 @@
 import { get } from '$lib/utils';
 import Qr from 'qrcode-base64';
 
-export async function load({ params, url }) {
+export async function load({ params, parent, url }) {
+	let { user } = await parent();
+	let pubkey;
+	if (user) ({ pubkey } = user);
+	else pubkey = params.username;
+
 	let { username } = params;
 	let text = `${encodeURI(username)}@${url.hostname}`;
 	let src = Qr.drawImg(text, { size: 300 });
 	let events = [];
 
 	try {
-		events = await get(`/${username}/events`);
+		events = await get(`/${pubkey}/events`);
 	} catch (e) {
 		console.log(e);
 	}
diff --git a/src/routes/(app)/[username]/+page.svelte b/src/routes/(app)/[username]/+page.svelte
index 78d84653..837257ef 100644
--- a/src/routes/(app)/[username]/+page.svelte
+++ b/src/routes/(app)/[username]/+page.svelte
@@ -1,12 +1,53 @@
 <script>
+	import { Buffer } from 'buffer';
+	import { entropyToMnemonic, mnemonicToSeedSync } from 'bip39';
+	import { enhance } from '$app/forms';
 	import { Feed, Icon, PageNotFound } from '$comp';
 	import { t } from '$lib/translations';
+	import { bech32m } from 'bech32';
+	import { calculateId, signId } from 'nostr';
+	import { bip32, stretch, post } from '$lib/utils';
+
+	const { decode, fromWords } = bech32m;
 	export let data;
 
+	let message;
+
 	let { events, user, subject, src, text } = data;
 	let followed = false;
 
 	let { username: n } = subject;
+
+	let submit = async () => {
+		let mnemonic, key, password, seed, entropy, child, privkey;
+		entropy = Buffer.from(
+			await crypto.subtle.decrypt(
+				{ name: 'AES-GCM', iv: new Uint8Array(16) },
+				await stretch(password, Buffer.from(user.salt, 'hex')),
+				Uint8Array.from(fromWords(decode(user.cipher, 180).words))
+			),
+			'hex'
+		).toString('hex');
+
+		mnemonic = entropyToMnemonic(entropy);
+		seed = mnemonicToSeedSync(mnemonic);
+		key = bip32.fromSeed(seed);
+		child = key.derivePath("m/44'/1237'/0'/0/0");
+		privkey = child.privateKey;
+
+		let event = {
+			pubkey: user.pubkey,
+			created_at: Math.floor(Date.now() / 1000),
+			kind: 1,
+			content: message,
+			tags: []
+		};
+
+		event.id = await calculateId(event);
+		event.sig = await signId(privkey, event.id);
+		await post(`/${user.username}`, { event });
+	};
+
 	$: username = n.length > 60 ? n.substr(0, 6) : n;
 </script>
 
@@ -69,9 +110,24 @@
 		</div>
 	</div>
 
-	<div class="w-full flex md:pt-12 lg:pt-0">
+	<div class="w-full md:pt-12 lg:pt-0">
+		{#if user.username === n}
+			<form on:submit|preventDefault={submit}>
+				<input
+					name="message"
+					bind:value={message}
+					placeholder="What's on your mind?"
+					class="w-full my-5 max-w-lg mx-auto"
+				/>
+			</form>
+		{/if}
+
 		<div class="mx-auto space-y-5 mt-5 lg:max-w-lg xl:max-w-2xl">
-			<Feed {events} />
+			{#if events.length}
+				<Feed {events} />
+			{:else}
+				<div class="text-center">You haven't posted anything yet</div>
+			{/if}
 		</div>
 	</div>
 </div>
diff --git a/src/routes/(app)/[username]/+server.js b/src/routes/(app)/[username]/+server.js
new file mode 100644
index 00000000..d0b1242f
--- /dev/null
+++ b/src/routes/(app)/[username]/+server.js
@@ -0,0 +1,6 @@
+import { auth, post } from '$lib/utils';
+import { json } from '@sveltejs/kit';
+
+export async function POST({ cookies, request }) {
+	return json(post('/nostr/send', await request.json(), auth(cookies)));
+}
diff --git a/src/routes/(app)/[username]/generate/+page.svelte b/src/routes/(app)/[username]/generate/+page.svelte
index ee67237c..fd6b6f7e 100644
--- a/src/routes/(app)/[username]/generate/+page.svelte
+++ b/src/routes/(app)/[username]/generate/+page.svelte
@@ -1,42 +1,20 @@
 <script>
 	import { Buffer } from 'buffer';
 	import { onMount } from 'svelte';
-	import { BIP32Factory } from 'bip32';
 	import { bech32m } from 'bech32';
 	import { generateMnemonic, mnemonicToEntropy, mnemonicToSeedSync } from 'bip39';
 	import * as ecc from 'tiny-secp256k1';
-	import { post } from '$lib/utils';
+	import { bip32, stretch, post } from '$lib/utils';
 	import { goto } from '$app/navigation';
 
 	export let data;
 	let { user } = data;
 
-	const { encode, decode, fromWords, toWords } = bech32m;
-
-	const stretch = async (password, salt) =>
-		crypto.subtle.deriveKey(
-			{
-				name: 'PBKDF2',
-				salt,
-				iterations: 100000,
-				hash: 'SHA-256'
-			},
-			await crypto.subtle.importKey(
-				'raw',
-				new TextEncoder().encode(password),
-				{ name: 'PBKDF2' },
-				false,
-				['deriveBits', 'deriveKey']
-			),
-			{ name: 'AES-GCM', length: 256 },
-			true,
-			['encrypt', 'decrypt']
-		);
+	const { encode, toWords } = bech32m;
 
 	let mnemonic, key, password, seed, entropy, cipher, pubkey, salt, child;
 
 	onMount(async () => {
-		let bip32 = await BIP32Factory(ecc);
 		mnemonic = generateMnemonic();
 		seed = mnemonicToSeedSync(mnemonic);
 		entropy = mnemonicToEntropy(mnemonic);
@@ -54,6 +32,7 @@
 
 		user.pubkey = Buffer.from(ecc.xOnlyPointFromPoint(child.publicKey)).toString('hex');
 		user.cipher = encode('en', toWords(bytes), 180);
+		user.salt = Buffer.from(salt).toString('hex');
 
 		await post(`/${user.username}/generate`, user);
 		goto(`/${user.username}/dashboard`);
-- 
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