From 1653a74da20e342866433e7ce5e1582d3b4f93bd Mon Sep 17 00:00:00 2001
From: Bob <dv4xd@proton.me>
Date: Sun, 18 Aug 2024 21:39:20 +0800
Subject: [PATCH] problem: no help thread

resolve https://github.com/nostrocket/hypergolic/issues/90
---
 src/components/HelpThreadNoteTree.svelte | 37 +++++++++
 src/lib/event_helpers/help_thread.ts     | 69 +++++++++++++++++
 src/routes/help/+page.svelte             | 96 +++++++++++++++++++++++-
 3 files changed, 201 insertions(+), 1 deletion(-)
 create mode 100644 src/components/HelpThreadNoteTree.svelte
 create mode 100644 src/lib/event_helpers/help_thread.ts

diff --git a/src/components/HelpThreadNoteTree.svelte b/src/components/HelpThreadNoteTree.svelte
new file mode 100644
index 0000000..f864774
--- /dev/null
+++ b/src/components/HelpThreadNoteTree.svelte
@@ -0,0 +1,37 @@
+<script lang="ts">
+	import { Avatar, Name } from '@nostr-dev-kit/ndk-svelte-components';
+	import { Separator } from '$lib/components/ui/separator/index.js';
+	import { unixToRelativeTime } from '@/helpers';
+	import { ndk } from '@/ndk';
+	import type { TreeNote } from '@/event_helpers/help_thread';
+
+	export let notes: TreeNote[];
+	export let isRoot: boolean = false;
+</script>
+
+<ol class="w-full">
+	{#each notes as note, index (note.id)}
+		{#if isRoot && index > 0}
+			<Separator />
+		{/if}
+		<li class="flex flex-col p-5">
+			<div class="flex items-center gap-2">
+				<Avatar
+					ndk={$ndk}
+					pubkey={note.pubkey}
+					class="h-5 w-5 flex-none rounded-full object-cover"
+				/>
+				<Name ndk={$ndk} pubkey={note.pubkey} class="inline-block truncate" />
+			</div>
+			<div class="overflow-hidden break-words" style="overflow-wrap: anywhere;">{note.content}</div>
+			<div class="text-gray-500">
+				{note.created_at ? unixToRelativeTime(note.created_at * 1000) : 'Loading'}
+			</div>
+			{#if note.children.length > 0}
+				<div class="ml-4">
+					<svelte:self notes={note.children} isRoot={false} />
+				</div>
+			{/if}
+		</li>
+	{/each}
+</ol>
diff --git a/src/lib/event_helpers/help_thread.ts b/src/lib/event_helpers/help_thread.ts
new file mode 100644
index 0000000..b578584
--- /dev/null
+++ b/src/lib/event_helpers/help_thread.ts
@@ -0,0 +1,69 @@
+import { prepareNostrEvent } from '@/helpers';
+import { NDKKind, type NDKEvent } from '@nostr-dev-kit/ndk';
+import type NDKSvelte from '@nostr-dev-kit/ndk-svelte';
+
+export const HELP_THREAD_ROOT_EVENT_ID =
+	'f05059e5d33716c38a10b392538a592de91014b6e9610c91e5f50543f2fdb4fd';
+const HELP_THREAD_ROOT_AUTHOR_PUBKEY =
+	'887f827161338ef4d3e83482498664ad7454caf9bda7d080c3b32821f1394708';
+
+export interface TreeNote {
+	id: string;
+	pubkey: string;
+	content: string;
+	created_at: number;
+	reply?: string;
+	root: string;
+	children: TreeNote[];
+}
+
+export function buildNoteTree(notes: NDKEvent[]): TreeNote[] {
+	const noteMap = new Map<string, TreeNote>();
+
+	notes.forEach((note) => {
+		const rootTag = note.getMatchingTags('e', 'root')[0]?.[1];
+		const replyTag = note.getMatchingTags('e', 'reply')[0]?.[1];
+
+		noteMap.set(note.id, {
+			id: note.id,
+			pubkey: note.author.pubkey,
+			content: note.content,
+			created_at: note.created_at!,
+			root: rootTag,
+			reply: replyTag,
+			children: []
+		});
+	});
+
+	notes.forEach((note) => {
+		const replyTag = note.getMatchingTags('e', 'reply')[0]?.[1];
+		if (replyTag) {
+			const parent = noteMap.get(replyTag);
+			const self = noteMap.get(note.id);
+			if (parent && self) {
+				parent.children.push(self);
+			}
+		}
+	});
+
+	const result = Array.from(noteMap.values()).filter(
+		(note) =>
+			!note.reply ||
+			(note.reply === HELP_THREAD_ROOT_EVENT_ID && note.root === HELP_THREAD_ROOT_EVENT_ID)
+	);
+
+	return result;
+}
+
+export function prepareQuestionNoteEvent(args: { ndk: NDKSvelte; content: string }) {
+	const tags = [
+		['p', HELP_THREAD_ROOT_AUTHOR_PUBKEY],
+		['e', HELP_THREAD_ROOT_EVENT_ID, 'wss://relay.nostrocket.org', 'reply'],
+		['e', HELP_THREAD_ROOT_EVENT_ID, 'wss://relay.nostrocket.org', 'root']
+	];
+	return prepareNostrEvent({
+		...args,
+		kind: NDKKind.Text,
+		tags
+	});
+}
diff --git a/src/routes/help/+page.svelte b/src/routes/help/+page.svelte
index 23def85..0d10cde 100644
--- a/src/routes/help/+page.svelte
+++ b/src/routes/help/+page.svelte
@@ -1 +1,95 @@
-Wouldn't it be cool to have a nostr help thread here?
+<script lang="ts">
+	import * as Card from '$lib/components/ui/card/index.js';
+	import { ndk } from '@/ndk';
+	import { NDKKind } from '@nostr-dev-kit/ndk';
+	import { onDestroy } from 'svelte';
+	import { derived } from 'svelte/store';
+	import Heading from '../../components/Heading.svelte';
+	import HelpThreadNoteTree from '../../components/HelpThreadNoteTree.svelte';
+	import Button from '@/components/ui/button/button.svelte';
+	import { Label } from '$lib/components/ui/label/index.js';
+	import { Textarea } from '$lib/components/ui/textarea/index.js';
+	import { devmode, currentUser } from '@/stores/session';
+	import {
+		buildNoteTree,
+		HELP_THREAD_ROOT_EVENT_ID,
+		prepareQuestionNoteEvent
+	} from '@/event_helpers/help_thread';
+	import type NDKSvelte from '@nostr-dev-kit/ndk-svelte';
+
+	let notes = $ndk.storeSubscribe({
+		kinds: [1 as NDKKind],
+		'#e': [HELP_THREAD_ROOT_EVENT_ID]
+	});
+
+	let treeNotes = derived(notes, ($_notes) => {
+		return buildNoteTree($_notes);
+	});
+
+	let content: string;
+
+	function publish(ndk: NDKSvelte) {
+		if (!ndk.signer) {
+			throw new Error('no ndk signer found');
+		}
+		let author = $currentUser;
+		if (!author) {
+			throw new Error('no current user');
+		}
+		const e = prepareQuestionNoteEvent({
+			ndk,
+			content
+		});
+		e.publish().then((x) => {
+			console.log(x);
+		});
+	}
+
+	onDestroy(() => {
+		notes.unsubscribe();
+	});
+</script>
+
+<div class="my-4 flex flex-col gap-2">
+	{#if $devmode}
+		<div>
+			<Button
+				on:click={() => {
+					console.log('notes', $notes);
+					console.log('treeNotes', $treeNotes);
+				}}
+				variant="outline"
+			>
+				Print to Console
+			</Button>
+		</div>
+	{/if}
+	<Heading title="Help" />
+	<div>
+		If the answers to the questions below do not address your issue, you can send your question here
+	</div>
+	<form class="relative overflow-hidden">
+		<Label for="message" class="sr-only">Question</Label>
+		<Textarea
+			id="message"
+			placeholder="Type your question here..."
+			class="w-full resize-none shadow-none"
+			bind:value={content}
+		/>
+		<div class="flex items-center pt-2">
+			<Button
+				type="submit"
+				size="sm"
+				class="ml-auto gap-1.5"
+				on:click={() => {
+					publish($ndk);
+				}}
+			>
+				Publish
+			</Button>
+		</div>
+	</form>
+	<Card.Root>
+		<HelpThreadNoteTree notes={$treeNotes} isRoot />
+	</Card.Root>
+</div>