feat(#5): Add the ability to select pre-defined card sets

src/components/Estimates.svelte

@@ -1,28 +1,31 @@
 <script lang="ts">
-	export let values: Array<number | string> = [1, 2, 3, 5, 8, 13, 21, '?'];
+	export let values: Array<number | string>;
 	export let onEstimateClick: (value: number | string) => void;
 	export let disableEstimates: boolean = false;
 </script>
 
 <div id="estimates-list">
 	<div class="centered-container">
-		{#each values as value}
-			<button
-				disabled={disableEstimates}
-				class="{disableEstimates ? 'estimate-card disabled' : 'estimate-card'}"
-				on:click={() => onEstimateClick(value)}
-				on:keydown={(event) => {
-					if (event.key === 'Enter' || event.key === ' ') {
-						event.preventDefault();
-						onEstimateClick(value);
-					}
-				}}
-				aria-label={`Estimate: ${value}`}
-				tabindex="0"
-			>
-				<p class="value">{value}</p>
-			</button>
-		{/each}
+		
+		{#if values !== undefined}
+			{#each values as value}
+				<button
+					disabled={disableEstimates}
+					class="{disableEstimates ? 'estimate-card disabled' : 'estimate-card'}"
+					on:click={() => onEstimateClick(value)}
+					on:keydown={(event) => {
+						if (event.key === 'Enter' || event.key === ' ') {
+							event.preventDefault();
+							onEstimateClick(value);
+						}
+					}}
+					aria-label={`Estimate: ${value}`}
+					tabindex="0"
+				>
+					<p class="value">{value}</p>
+				</button>
+			{/each}
+		{/if}
 	</div>
 </div>
 

src/routes/+page.svelte

@@ -1,11 +1,26 @@
 <script>
-	import { generateId } from './estimation/estimation.js';
+	import { onMount } from 'svelte';
+	import { connectToWebSocket, sendMessage, generateId } from './estimation/estimation.js';
 	import { goto } from '$app/navigation';
 
 	let roomId = '';
+	let socket;
+	const cardSets = [
+		{ name: 'Fibonacci', values: [1, 2, 3, 5, 8, 13, 21, '?'], example: '(1, 2, 3, 5)' },
+		{
+			name: 'T-Shirt Sizing',
+			values: ['XS', 'S', 'M', 'L', 'XL', 'XXL', '?'],
+			example: '(XS, S, M, L)'
+		},
+		{ name: 'Powers of 2', values: [1, 2, 4, 8, 16, 32, '?'], example: '(1, 2, 4, 8)' },
+		{ name: 'Sequential', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, '?'], example: '(1, 2, 3, 4)' }
+	];
+
+	let selectedCardSet = cardSets[0];
 
 	function startARoom() {
 		const roomId = generateId();
+		sendMessage(socket, { roomId: roomId, type: 'create-room', cardSetName: selectedCardSet.name });
 		goto(`/estimation/${roomId}`);
 	}
 
@@ -16,12 +31,32 @@
 			goto(`/estimation/${roomId}`);
 		}
 	}
+	function onMessageReceived(message) {
+		
+	}
+
+	onMount(() => {
+		socket = connectToWebSocket(null, onMessageReceived);
+
+		setInterval(() => {
+			if (socket.readyState === WebSocket.OPEN) {
+				socket.send(JSON.stringify({ type: 'ping' }));
+			}
+		}, 45000); // send a ping every 45 seconds
+	});
 </script>
 
 <div class="container">
 	<p>
 		Simply start a room and share the URL to everyone else who needs to join the estimation session.
 	</p>
+	<div class="dropdown">
+		<select on:change={(e) => (selectedCardSet = cardSets[e.target.selectedIndex])}>
+			{#each cardSets as cardSet, i}
+				<option value={i}>{cardSet.name} {cardSet.example}</option>
+			{/each}
+		</select>
+	</div>
 	<button class="button button-green" on:click={startARoom}>Start a room</button>
 	<div class="join-room-container">
 		<label for="room-id">Join a room:</label>

src/routes/estimation/[roomId]/+page.svelte

@@ -56,11 +56,12 @@
 	let showModal = true;
 	const userId = generateId();
 	let users: Array<User> = [];
-	let estimateGroups: { [key: number]: string[] } = {};
+	let estimateGroups: { [key: number | string]: string[] } = {};
 	let showRestartButton = false;
 	let showEstimates = false;
 	let disableEstimates: boolean = false;
 	let audioElement;
+	let selectedCardSet;
 
 	function closeModal() {
 		showModal = false;
@@ -104,6 +105,8 @@
 		if (message.type === 'user-joined') {
 			sendMessage(socket, { type: 'get-user-estimates' });
 		} else if (message.type === 'user-estimates') {
+			selectedCardSet = message.selectedCardSet.values;
+
 			message.users.forEach((user) => {
 				let updatedUser = users.find((u) => u.userId === user.userId);
 				if (updatedUser === undefined) {
@@ -187,7 +190,7 @@
 	>Share Room Link</button
 >
 
-<Estimates {disableEstimates} onEstimateClick={handleEstimateClick} />
+<Estimates values={selectedCardSet} {disableEstimates} onEstimateClick={handleEstimateClick} />
 
 {#if Object.keys(estimateGroups).length > 0}
 	<EstimateGroupsList {estimateGroups} />

src/server/classes/Room.ts

@@ -1,12 +1,43 @@
 import { WebSocket } from 'ws';
 import { User } from './User';
 
+class CardSet {
+	name: string;
+	values: Array<string | number>;
+	example: string;
+
+	constructor(name: string, values: Array<string | number>, example: string) {
+		this.name = name;
+		this.values = values;
+		this.example = example;
+	}
+}
+
+export const cardSets: Array<CardSet> = [
+	{ name: 'Fibonacci', values: [1, 2, 3, 5, 8, 13, 21, '?'], example: '(1, 2, 3, 5)' },
+	{
+		name: 'T-Shirt Sizing',
+		values: ['XS', 'S', 'M', 'L', 'XL', 'XXL', '?'],
+		example: '(XS, S, M, L)'
+	},
+	{ name: 'Powers of 2', values: [1, 2, 4, 8, 16, 32, '?'], example: '(1, 2, 4, 8)' },
+	{ name: 'Sequential', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, '?'], example: '(1, 2, 3, 4)' }
+];
+
 export class Room {
 	id: string;
+	cardSet: CardSet;
 	users: Map<WebSocket, User>;
 
-	constructor(id: string) {
+	constructor(id: string, cardSetName: string) {
 		this.id = id;
+		const cardSet = cardSets.find((cardSet) => cardSet.name === cardSetName);
+		if (cardSet) {
+			this.cardSet = cardSet;
+		} else {
+			this.cardSet = cardSets[0];
+		}
+		
 		this.users = new Map();
 	}
 

src/server/websocket.ts

@@ -1,6 +1,6 @@
 import express from 'express';
 import { WebSocketServer, WebSocket } from 'ws';
-import { Room } from './classes/Room.js';
+import { Room, cardSets } from './classes/Room.js';
 import { User } from './classes/User.js';
 import { JoinRoomMessage } from './classes/messages/JoinRoomMessage.js';
 import { ChangeEstimateMessage } from './classes/messages/ChangeEstimateMessage.js';
@@ -62,23 +62,31 @@ wss.on('connection', (ws: WebSocket, req) => {
 
 	ws.on('error', onSocketPostError);
 
+	function createRoom(roomId: string, cardSetName: string) {
+		room = new Room(roomId, cardSetName);
+		rooms.add(room);
+	}
+
 	ws.on('message', (message) => {
 		const data = JSON.parse(message.toString());
 
-		if (data.type === 'join-room') {
+		if (data.type === 'create-room') {
+			const roomId = data.roomId;
+			const cardSetName = data.cardSetName;
+			createRoom(roomId, cardSetName);
+		} else if (data.type === 'join-room') {
 			const joinRoomMessage: JoinRoomMessage = data as JoinRoomMessage;
 			const { roomId, userId, name } = joinRoomMessage;
 			room = getRoomById(roomId);
 
 			// Create room if it doesn't already exist
 			if (!room) {
-				room = new Room(roomId);
-				rooms.add(room);
+				createRoom(roomId, data.cardSetName);
 			}
 
 			// Create the user in the room
 			const user = new User(userId, name);
-			room.addUser(ws, user);
+			room!.addUser(ws, user);
 
 			broadcastToRoom(roomId, { type: 'user-joined', message: `${name} has joined the room` });
 		} else if (data.type === 'select-estimate') {
@@ -144,7 +152,7 @@ wss.on('connection', (ws: WebSocket, req) => {
 		} else if (data.type === 'get-user-estimates') {
 			if (room) {
 				const users = room.getUsers();
-				broadcastToRoom(room.id, { type: 'user-estimates', users });
+				broadcastToRoom(room.id, { type: 'user-estimates', users, selectedCardSet: room.cardSet });
 			}
 		} else if (data.type === 'trigger-emoji') {
 			const { cardId, emoji } = data;