feat: chat list (joined)

src/lib/blah/connection/chatServer.ts

@@ -95,6 +95,23 @@ export class BlahChatServerConnection {
 		await this.apiCall('POST', `/room/${id}/admin`, payload);
 	}
 
+	private async fetchRoomList(filter: 'joined' | 'public'): Promise<BlahRoomInfo[]> {
+		const { rooms }: { rooms: BlahRoomInfo[] } = await this.apiCall(
+			'GET',
+			`/room?filter=${filter}`
+		);
+		return rooms;
+	}
+
+	async fetchJoinedRooms(): Promise<BlahRoomInfo[]> {
+		if (!this.keypair) return [];
+		return await this.fetchRoomList('joined');
+	}
+
+	async discoverRooms(): Promise<BlahRoomInfo[]> {
+		return await this.fetchRoomList('public');
+	}
+
 	async sendMessage(room: string, message: BlahRichText): Promise<void> {
 		if (!this.keypair) throw new Error('Must send message with a keypair');
 		const payload: BlahMessage = { room, rich_text: message, typ: 'chat' };
@@ -153,7 +170,7 @@ export class BlahChatServerConnection {
 	}
 
 	connect() {
-		if (!this.webSocket) this.webSocket = this.createWebSocket();
+		if (!this.webSocket && this.keypair) this.webSocket = this.createWebSocket();
 	}
 
 	disconnect() {
@@ -174,8 +191,6 @@ export class BlahChatServerConnection {
 		roomId: string,
 		onNewMessage: (message: BlahSignedPayload<BlahMessage>) => void
 	): { unsubscribe: () => void } {
-		if (!this.webSocket) throw new Error('Must connect to WebSocket before subscribing to rooms');
-
 		const listeners = this.roomListeners.get(roomId) ?? new Set();
 		listeners.add(onNewMessage);
 		this.roomListeners.set(roomId, listeners);
@@ -194,9 +209,6 @@ export class BlahChatServerConnection {
 	subscribe(onNewMessage: (message: BlahSignedPayload<BlahMessage>) => void): {
 		unsubscribe: () => void;
 	} {
-		if (!this.webSocket)
-			throw new Error('Must connect to WebSocket before subscribing to messages');
-
 		this.serverListeners.add(onNewMessage);
 
 		return {

src/lib/blah/structures/roomInfo.ts

@@ -1,3 +1,8 @@
+import type { BlahSignedPayload } from '../crypto';
+import type { BlahMessage } from './message';
+
 export type BlahRoomInfo = {
+	ruuid: string;
 	title: string;
+	last_chat?: BlahSignedPayload<BlahMessage>;
 };

src/lib/chatList.ts

@@ -0,0 +1,68 @@
+import { readable, writable, type Readable, type Writable } from 'svelte/store';
+import { chatFromBlah, type Chat } from './types';
+import type { BlahMessage, BlahRoomInfo } from './blah/structures';
+import type { BlahSignedPayload } from './blah/crypto';
+
+export class ChatListManager {
+	chatList: Writable<Chat[]>;
+
+	constructor() {
+		this.chatList = writable<Chat[]>([]);
+	}
+
+	private sortChats(chatList: Chat[]) {
+		chatList.sort(
+			(a, b) =>
+				(b.lastMessage?.date ?? new Date(1970, 0, 1)).getTime() ??
+				-(a.lastMessage?.date ?? new Date(1970, 0, 1)).getTime()
+		);
+	}
+
+	ingestChats(chats: BlahRoomInfo[], serverEndpoint: string) {
+		this.chatList.update((chatList) => {
+			for (const chat of chats) {
+				const newChat = chatFromBlah(chat, serverEndpoint);
+
+				const existing = chatList.find((c) => c.id === chat.ruuid);
+				if (existing) {
+					existing.name = newChat.name;
+					existing.lastMessage = newChat.lastMessage ?? existing.lastMessage;
+				} else {
+					chatList.push(newChat);
+					console.log('new chat added to list', newChat);
+				}
+			}
+
+			this.sortChats(chatList);
+			return chatList;
+		});
+	}
+
+	ingestMessage(message: BlahSignedPayload<BlahMessage>, serverEndpoint: string) {
+		this.chatList.update((chatList) => {
+			const chat = chatList.find((c) => c.id === message.signee.payload.room);
+			if (chat) {
+				const newChat = chatFromBlah(
+					{ ruuid: chat.id, title: chat.name, last_chat: message },
+					serverEndpoint
+				);
+				chat.lastMessage = newChat.lastMessage ?? chat.lastMessage;
+			}
+			this.sortChats(chatList);
+			return chatList;
+		});
+	}
+
+	leaveChatServers(serverEndpoints: string[]) {
+		this.chatList.update((chatList) => {
+			return chatList.filter((chat) => serverEndpoints.includes(chat.server));
+		});
+	}
+}
+
+export function useChatList(manager: ChatListManager): Readable<Chat[]> {
+	return readable<Chat[]>([], (set) => {
+		const unsubscribe = manager.chatList.subscribe(set);
+		return unsubscribe;
+	});
+}

src/lib/chatServers.ts

@@ -3,23 +3,44 @@ import { get } from 'svelte/store';
 import { BlahChatServerConnection } from './blah/connection/chatServer';
 import { BlahKeyPair, type EncodedBlahKeyPair } from './blah/crypto';
 import { currentKeyPair } from './keystore';
+import { ChatListManager } from './chatList';
+import { browser } from '$app/environment';
 
 export const chatServers = persisted<string[]>('weblah-chat-servers', ['https://blah.oxa.li/api']);
 
 class ChatServerConnectionPool {
 	private connections: Map<string, BlahChatServerConnection> = new Map();
 	private keypair: BlahKeyPair | null = null;
+	chatList: ChatListManager = new ChatListManager();
 
 	constructor() {
+		if (browser) {
 			chatServers.subscribe(this.onChatServersChange.bind(this));
 			currentKeyPair.subscribe(this.onKeyPairChange.bind(this));
 		}
+	}
 
-	connectAll(keypair?: BlahKeyPair) {
-		for (const endpoint of get(chatServers)) {
-			const connection = new BlahChatServerConnection(endpoint, keypair);
+	private createAndConnect(endpoint: string) {
+		const connection = new BlahChatServerConnection(endpoint, this.keypair);
 		this.connections.set(endpoint, connection);
 		connection.connect();
+		this.setupChatList(connection);
+	}
+
+	private fetchJoinedRooms(connection: BlahChatServerConnection) {
+		connection
+			.fetchJoinedRooms()
+			.then((rooms) => this.chatList.ingestChats(rooms, connection.endpoint));
+	}
+
+	private setupChatList(connection: BlahChatServerConnection) {
+		this.fetchJoinedRooms(connection);
+		connection.subscribe((message) => this.chatList.ingestMessage(message, connection.endpoint));
+	}
+
+	connectAll() {
+		for (const endpoint of get(chatServers)) {
+			this.createAndConnect(endpoint);
 		}
 	}
 	disconnectAll() {
@@ -33,24 +54,27 @@ class ChatServerConnectionPool {
 		this.keypair = await BlahKeyPair.fromEncoded(encodedKeyPair);
 		for (const connection of this.connections.values()) {
 			connection.changeKeyPair(this.keypair);
+			connection.connect();
+			this.fetchJoinedRooms(connection);
 		}
 	}
 
 	private async onChatServersChange(newChatServers: string[]) {
 		// Disconnect from chat servers that are no longer in the list
+		const disconnectedEndpoints: string[] = [];
 		for (const [endpoint, connection] of this.connections.entries()) {
 			if (!newChatServers.includes(endpoint)) {
 				connection.disconnect();
 				this.connections.delete(endpoint);
+				disconnectedEndpoints.push(endpoint);
 			}
 		}
+		this.chatList.leaveChatServers(disconnectedEndpoints);
 
 		// Connect to chat servers that are in the list but not yet connected
 		for (const endpoint of newChatServers) {
 			if (!this.connections.has(endpoint)) {
-				const connection = new BlahChatServerConnection(endpoint, this.keypair);
-				this.connections.set(endpoint, connection);
-				connection.connect();
+				this.createAndConnect(endpoint);
 			}
 		}
 	}

src/lib/types/chat.ts

@@ -1,4 +1,5 @@
-import type { Message } from './message';
+import type { BlahRoomInfo } from '$lib/blah/structures';
+import { messageFromBlah, type Message } from './message';
 
 export type Chat = {
 	server: string;
@@ -9,3 +10,13 @@ export type Chat = {
 	lastMessage?: Message;
 	unreadCount?: number;
 };
+
+export function chatFromBlah(room: BlahRoomInfo, serverEndpoint: string): Chat {
+	return {
+		server: serverEndpoint,
+		id: room.ruuid,
+		name: room.title,
+		type: 'group',
+		lastMessage: room.last_chat ? messageFromBlah(room.last_chat) : undefined
+	};
+}

src/routes/(app)/ChatList.svelte

@@ -1,115 +1,22 @@
 <script>
+	import { browser } from '$app/environment';
+	import { useChatList } from '$lib/chatList';
+	import { chatServerConnectionPool } from '$lib/chatServers';
 	import ChatListHeader from './ChatListHeader.svelte';
 	import ChatListItem from './ChatListItem.svelte';
+
+	const chatList = browser ? useChatList(chatServerConnectionPool.chatList) : null;
 </script>
 
 <div class="flex h-[100dvh] flex-col justify-stretch">
 	<ChatListHeader />
 	<div class="min-h-0 flex-1 touch-pan-y overflow-y-auto">
 		<ul>
-			<ChatListItem
-				chat={{
-					id: 'room-1',
-					name: 'Blah IM Interest Group',
-					lastMessage: {
-						sender: { id: '1', name: 'septs' },
-						content: '窄带通信吧，asn1 + bzip2 效果还是可以的',
-						date: new Date('2024-08-29T02:11Z')
-					},
-					unreadCount: 3
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: 'room-2',
-					name: 'Laoself Chat',
-					lastMessage: {
-						sender: { id: '10', name: 'Richard Luo 🐱' },
-						content: '如果durov没事 那你是不是又可以拖延症复发了（',
-						date: new Date('2024-08-29T02:11Z')
-					}
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: 'room-3',
-					name: 'Ubuntu中文',
-					lastMessage: {
-						sender: { id: '15', name: 'chen jianhao' },
-						content:
-							'就什么也没安装，昨晚好好的，就打开了pycharm而已，写完代码直接按设置好的快捷键alt+s 关机 重启就不行了',
-						date: new Date('2024-08-29T02:27Z')
-					},
-					unreadCount: 827469
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '1',
-					name: 'septs',
-					lastMessage: {
-						sender: { id: '1', name: 'septs' },
-						content: '验证 checksum 是否正确的代价还是可以接受的',
-						date: new Date('2024-08-28T02:54Z')
-					}
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '2',
-					name: 'oxa',
-					lastMessage: {
-						sender: { id: '2', name: 'oxa' },
-						content: '但似乎现在大家都讨厌 pgp ，觉得太复杂',
-						date: new Date('2024-08-28T02:37Z')
-					}
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '3',
-					name: 'omo',
-					lastMessage: {
-						sender: { id: '3', name: 'omo' },
-						content: '我對 revalidate 的理解是不經過 cache 直接重拉一遍',
-						date: new Date('2024-08-28T02:11Z')
-					},
-					unreadCount: 8
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '4',
-					name: 'Inno Aiolos',
-					lastMessage: {
-						sender: { id: '4', name: 'Inno Aiolos' },
-						content: '至少得把信息分发给所有广播自己是这个public key的destination',
-						date: new Date('2024-07-28T02:11Z')
-					}
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '5',
-					name: 'Gary です',
-					lastMessage: {
-						sender: { id: '5', name: 'Gary です' },
-						content: '没必要8，长毛象那样挺麻烦的',
-						date: new Date('2023-07-28T02:11Z')
-					}
-				}}
-			/>
-			<ChatListItem
-				chat={{
-					id: '6',
-					name: 'Chtholly Nota Seniorious',
-					lastMessage: {
-						sender: { id: '6', name: 'Chtholly Nota Seniorious' },
-						content: '遥遥领先！\n隔壁 nostr 最开始没有注意到这个问题，然后被狂灌置顶 spam',
-						date: new Date('2022-07-28T02:11Z')
-					}
-				}}
-			/>
+			{#if $chatList}
+				{#each $chatList as chat}
+					<ChatListItem {chat} />
+				{/each}
+			{/if}
 		</ul>
 	</div>
 </div>

src/routes/(app)/ChatListItem.svelte

@@ -7,12 +7,21 @@
 	import { blahRichTextToPlainText } from '$lib/richText';
 
 	export let chat: Chat;
+
+	let urlSafeEndpoint: string;
+	$: {
+		const url = new URL(chat.server);
+		urlSafeEndpoint = encodeURIComponent(url.hostname + url.pathname);
+	}
 </script>
 
 <li
 	class="relative after:absolute after:bottom-0 after:end-0 after:start-14 after:border-t-[0.5px] after:border-ss-secondary"
 >
-	<a href="/chats/{chat.id}" class="flex h-20 cursor-default items-center gap-2 px-2">
+	<a
+		href="/chats/{urlSafeEndpoint}/{chat.id}"
+		class="flex h-20 cursor-default items-center gap-2 px-2"
+	>
 		<div class="size-10">
 			<AvatarBeam size={40} name={chat.name} />
 		</div>

src/routes/(app)/chats/[server]/[chatId]/+page.svelte

@@ -28,7 +28,7 @@
 <div class="flex h-full w-full flex-col items-center justify-center">
 	{#if server}
 		{@const { info, messages, sendMessage } = useChat(server, roomId)}
-		<ChatPage {info} {messages} on:sendMessage={sendMessage} />
+		<ChatPage {info} {messages} on:sendMessage={(e) => sendMessage(e.detail)} />
 	{:else}
 		<ServiceMessage>
 			To view this chat, you need to connect to chat server

src/routes/(app)/chats/[server]/[chatId]/ChatInput.svelte

@@ -28,7 +28,7 @@
 </script>
 
 <form
-	class="flex items-end gap-2 border-t border-ss-secondary bg-sb-primary p-2 shadow-sm"
+	class="flex w-full items-end gap-2 border-t border-ss-secondary bg-sb-primary p-2 shadow-sm"
 	bind:this={form}
 	on:submit|preventDefault={submit}
 >

src/routes/(app)/chats/[server]/[chatId]/ChatPage.svelte

@@ -13,13 +13,13 @@
 	export let info: Readable<Chat>;
 	export let messages: Readable<Message[]>;
 
-	type $$Events = {
-		sendMessage: BlahRichText;
-	};
+	interface $$Events {
+		sendMessage: CustomEvent<BlahRichText>;
+	}
 </script>
 
 <ChatHeader info={$info} outsideUnreadCount={263723} />
-<BgPattern class="flex-1" pattern="charlieBrown">
+<BgPattern class="w-full flex-1" pattern="charlieBrown">
 	<ChatHistory messages={$messages} mySenderId={$currentKeyPair?.id} />
 </BgPattern>
 <ChatInput on:sendMessage />