Squash commmits

.dockerignore

@@ -0,0 +1,17 @@
+Dockerfile
+.dockerignore
+.git
+.gitignore
+.gitattributes
+README.md
+.npmrc
+.prettierrc
+.eslintrc.cjs
+.graphqlrc
+.editorconfig
+.svelte-kit
+.vscode
+node_modules
+build
+package
+**/.env

.env.example

@@ -0,0 +1 @@
+CRABFIT_API_URL=https://api.crab.fit/event/cfschedulerdemo-282854

.gitignore

@@ -0,0 +1,23 @@
+node_modules
+
+# Output
+.output
+.vercel
+.netlify
+.wrangler
+/.svelte-kit
+/build
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.*
+!.env.example
+!.env.test
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

.npmrc

@@ -0,0 +1 @@
+engine-strict=false

.prettierignore

@@ -0,0 +1,9 @@
+# Package Managers
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+bun.lock
+bun.lockb
+
+# Miscellaneous
+/static/

.prettierrc

@@ -0,0 +1,16 @@
+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte", "prettier-plugin-tailwindcss"],
+	"overrides": [
+		{
+			"files": "*.svelte",
+			"options": {
+				"parser": "svelte"
+			}
+		}
+	],
+	"tailwindStylesheet": "./src/app.css"
+}

Dockerfile

@@ -0,0 +1,27 @@
+FROM node:22-alpine AS builder
+
+WORKDIR /app
+
+RUN npm install -g corepack@0.24.1 && corepack enable
+
+# Copy deps first for caching
+COPY pnpm-lock.yaml package.json ./
+RUN pnpm i --frozen-lockfile
+
+# Copy rest of app
+COPY . .
+
+# Build
+RUN pnpm run build
+RUN pnpm prune --production
+
+FROM node:22-alpine
+WORKDIR /app
+COPY --from=builder /app/build build/
+COPY --from=builder /app/node_modules node_modules/
+COPY package.json .
+EXPOSE 3000
+ENV NODE_ENV=production
+
+CMD [ "node", "build" ]
+

README.md

@@ -0,0 +1,37 @@
+## Completely Fair™ Scheduler Webapp
+The CF scheduler helps you find time slots that you have in common with others. This is helpful when you for example have coworkers from different parts of the world.
+
+Originally inspired by the python-based [completely-fair-scheduler](https://git.autonomic.zone/autonomic-cooperative/completely-fair-scheduler), this webapp is more accessible as it does not require the use of a terminal. 
+
+## How to use
+### 1. Create a crabfit
+Make an event on your chosen crabfit instance, in our case https://crab.fit/
+
+Except the name, use these settings when creating the event:
+
+![crabift-settings](crabfit-settings.png)
+
+Get your teammates to fill it out!
+
+### 2. Set the CRABFIT_API_URL
+Get the event ID. It's at the end of the url of the event. In the demo url it's `cfschedulerdemo-282854`. Put `https://api.crab.fit/event/` in front of it and you have the API url, like so: `https://api.crab.fit/event/cfschedulerdemo-282854`
+
+
+### 3. Start the application
+#### docker-compose (suggested)
+```
+docker compose up
+```
+
+#### pnpm
+```
+pnpm install
+pnpm build
+pnpm preview
+```
+
+### 4. You're done!
+Your webapp should be running on [127.0.0.1:3000](127.0.0.1:3000). It should look something like this:
+![demo](demo.png)
+
+

docker-compose.yml

@@ -0,0 +1,16 @@
+version: '3.8'
+
+services:
+  nodejs:
+    restart: unless-stopped
+    build:
+      context: ./
+      dockerfile: Dockerfile
+    environment:
+      - CRABFIT_API_URL=${CRABFIT_API_URL}
+    ports:
+      - '3000:3000'
+    deploy:
+      update_config:
+        failure_action: rollback
+        order: start-first

eslint.config.js

@@ -0,0 +1,40 @@
+import prettier from 'eslint-config-prettier';
+import { includeIgnoreFile } from '@eslint/compat';
+import js from '@eslint/js';
+import svelte from 'eslint-plugin-svelte';
+import globals from 'globals';
+import { fileURLToPath } from 'node:url';
+import ts from 'typescript-eslint';
+import svelteConfig from './svelte.config.js';
+
+const gitignorePath = fileURLToPath(new URL('./.gitignore', import.meta.url));
+
+export default ts.config(
+	includeIgnoreFile(gitignorePath),
+	js.configs.recommended,
+	...ts.configs.recommended,
+	...svelte.configs.recommended,
+	prettier,
+	...svelte.configs.prettier,
+	{
+		languageOptions: {
+			globals: { ...globals.browser, ...globals.node }
+		},
+		rules: {
+			// typescript-eslint strongly recommend that you do not use the no-undef lint rule on TypeScript projects.
+			// see: https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+			'no-undef': 'off'
+		}
+	},
+	{
+		files: ['**/*.svelte', '**/*.svelte.ts', '**/*.svelte.js'],
+		languageOptions: {
+			parserOptions: {
+				projectService: true,
+				extraFileExtensions: ['.svelte'],
+				parser: ts.parser,
+				svelteConfig
+			}
+		}
+	}
+);

package.json

@@ -0,0 +1,55 @@
+{
+	"name": "completely-fair-scheduler-webapp",
+	"private": true,
+	"version": "0.0.1",
+	"type": "module",
+	"scripts": {
+		"dev": "vite dev",
+		"build": "vite build",
+		"preview": "vite preview --port 3000",
+		"prepare": "svelte-kit sync || echo ''",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"format": "prettier --write .",
+		"lint": "prettier --check . && eslint .",
+		"test:unit": "vitest",
+		"test": "npm run test:unit -- --run"
+	},
+	"devDependencies": {
+		"@eslint/compat": "^1.2.5",
+		"@eslint/js": "^9.31.0",
+		"@sveltejs/adapter-node": "^5.2.12",
+		"@sveltejs/kit": "^2.22.0",
+		"@sveltejs/vite-plugin-svelte": "^6.0.0",
+		"@tailwindcss/vite": "^4.0.0",
+		"daisyui": "^5.0.46",
+		"eslint": "^9.18.0",
+		"eslint-config-prettier": "^10.0.1",
+		"eslint-plugin-svelte": "^3.0.0",
+		"globals": "^16.0.0",
+		"mathjs": "^14.5.3",
+		"node-fetch": "^3.3.2",
+		"prettier": "^3.4.2",
+		"prettier-plugin-svelte": "^3.3.3",
+		"prettier-plugin-tailwindcss": "^0.6.11",
+		"svelte": "^5.0.0",
+		"svelte-check": "^4.0.0",
+		"tailwindcss": "^4.0.0",
+		"typescript": "^5.0.0",
+		"typescript-eslint": "^8.20.0",
+		"vite": "^7.0.4",
+		"vitest": "^3.2.3"
+	},
+	"pnpm": {
+		"onlyBuiltDependencies": [
+			"esbuild"
+		]
+	},
+	"packageManager": "pnpm@9.12.1+sha512.e5a7e52a4183a02d5931057f7a0dbff9d5e9ce3161e33fa68ae392125b79282a8a8a470a51dfc8a0ed86221442eb2fb57019b0990ed24fab519bf0e1bc5ccfc4",
+	"dependencies": {
+		"@lucide/svelte": "^0.525.0",
+		"build": "^0.1.4",
+		"pnpm": "^10.14.0",
+		"preview": "^0.1.3"
+	}
+}

src/app.css

@@ -0,0 +1,4 @@
+@import 'tailwindcss';
+@plugin "daisyui" {
+  themes: cmyk --default, dracula --prefersdark;
+}

src/app.d.ts

@@ -0,0 +1,13 @@
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+	namespace App {
+		// interface Error {}
+		// interface Locals {}
+		// interface PageData {}
+		// interface PageState {}
+		// interface Platform {}
+	}
+}
+
+export {};

src/app.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<link rel="icon" href="%sveltekit.assets%/favicon.svg" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		%sveltekit.head%
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">%sveltekit.body%</div>
+	</body>
+</html>

src/demo.spec.ts

@@ -0,0 +1,7 @@
+import { describe, it, expect } from 'vitest';
+
+describe('sum test', () => {
+	it('adds 1 + 2 to equal 3', () => {
+		expect(1 + 2).toBe(3);
+	});
+});

src/lib/components/ClickSpark.svelte

@@ -0,0 +1,79 @@
+<!-- https://codepen.io/hexagoncircle/pen/bGZdWyw -->
+
+<script>
+	let svgEl;
+	let sparkEl;
+
+	export function triggerSpark(e) {
+		setPosition(e);
+		animate();
+	}
+
+	function setPosition(e) {
+		sparkEl.style.left = `${e.pageX - sparkEl.clientWidth / 2}px`;
+		sparkEl.style.top = `${e.pageY - sparkEl.clientHeight / 2}px`;
+	}
+
+	function animate() {
+		const sparks = [...svgEl.children];
+		const size = parseInt(sparks[0].getAttribute('y1'));
+		const offset = size / 2 + 'px';
+
+		const options = {
+			duration: 660,
+			easing: 'cubic-bezier(0.25, 1, 0.5, 1)',
+			fill: 'forwards'
+		};
+
+		sparks.forEach((spark, i) => {
+			const deg = `calc(${i} * (360deg / ${sparks.length}))`;
+			const keyframes = [
+				{
+					strokeDashoffset: size * 3,
+					transform: `rotate(${deg}) translateY(${offset})`
+				},
+				{
+					strokeDashoffset: size,
+					transform: `rotate(${deg}) translateY(0)`
+				}
+			];
+			spark.animate(keyframes, options);
+		});
+	}
+</script>
+
+<div bind:this={sparkEl} class="spark">
+	<svg
+		bind:this={svgEl}
+		viewBox="0 0 100 100"
+		fill="none"
+		stroke-linecap="round"
+		stroke-linejoin="round"
+		stroke-width="4"
+		stroke="var(--color-accent, currentcolor)"
+	>
+		{#each Array(8) as _}
+			<line
+				x1="50"
+				y1="30"
+				x2="50"
+				y2="4"
+				stroke-dasharray="30"
+				stroke-dashoffset="30"
+				style="transform-origin: center"
+			/>
+		{/each}
+	</svg>
+</div>
+
+<style>
+	.spark {
+		position: absolute;
+		pointer-events: none;
+	}
+	svg {
+		width: 50px;
+		height: 50px;
+		transform: rotate(-20deg);
+	}
+</style>

src/lib/crabfitData.ts

@@ -0,0 +1,17 @@
+import type { Member } from '$lib/meeting';
+import { fetchCrabfitData } from '$lib/meeting';
+import { env } from '$env/dynamic/private';
+
+export let crabfitData: Member[] | null = null;
+let lastFetchTime = 0;
+const TTL = 1000 * 60 * 60 * 12; // 12 hours in ms
+
+export async function getCrabfitData(): Promise<Member[]> {
+	const now = Date.now();
+	if (!crabfitData || now - lastFetchTime > TTL) {
+		crabfitData = await fetchCrabfitData(env.CRABFIT_API_URL);
+		lastFetchTime = now;
+		console.log(`${now} cached new crabifit data`);
+	}
+	return crabfitData;
+}

src/lib/index.ts

@@ -0,0 +1 @@
+// place files you want to import through the `$lib` alias in this folder.

src/lib/meeting.ts

@@ -0,0 +1,108 @@
+import fetch from 'node-fetch';
+import { env } from '$env/dynamic/private';
+
+export type Member = {
+	name: string;
+	availability: string[];
+};
+
+export type Options = {
+	members: Member[];
+	days: string[];
+	number: number;
+};
+
+const dayMap: Record<string, string> = {
+	Monday: '1',
+	Tuesday: '2',
+	Wednesday: '3',
+	Thursday: '4',
+	Friday: '5',
+	Saturday: '6',
+	Sunday: '7'
+};
+
+const dayReverseMap: Record<string, string> = {
+	'1': 'Monday',
+	'2': 'Tuesday',
+	'3': 'Wednesday',
+	'4': 'Thursday',
+	'5': 'Friday',
+	'6': 'Saturday',
+	'7': 'Sunday'
+};
+
+export function findMeetingOptions(
+	members: Member[],
+	{ days, number }: Omit<Options, 'members'>
+): { [key: string]: [string, string] }[] {
+	const data: Record<string, string[]> = {};
+	const selectedDays = days.map((d) => dayMap[d]);
+
+	for (const member of members) {
+		for (const slot of member.availability) {
+			const [time, day] = slot.split('-');
+			if (!time.endsWith('00')) continue;
+			if (!selectedDays.includes(day)) continue;
+			if (!data[slot]) data[slot] = [];
+			data[slot].push(member.name);
+		}
+	}
+
+	const membersCount = members.length;
+	const slots = Object.keys(data);
+	const combinations = getCombinations(slots, number);
+	const seen: Set<string> = new Set();
+	const options: { [key: string]: [string, string] }[] = [];
+	let counter = 1;
+
+	for (const combo of combinations) {
+		const unique = new Set(combo);
+		if (unique.size < number) continue;
+		const key = [...unique].sort().join(',');
+		if (seen.has(key)) continue;
+		seen.add(key);
+
+		const attendeesPerSlot = combo.map((slot) => data[slot] ?? []);
+		const attendees = new Set(attendeesPerSlot.flat());
+
+		if (
+			attendees.size === membersCount &&
+			attendeesPerSlot.every((s) => s.length >= Math.floor(membersCount / number)) &&
+			attendeesPerSlot.every((s) => s.length < Math.floor(membersCount / number) + 2)
+		) {
+			for (const slot of combo) {
+				const [time, day] = slot.split('-');
+				options.push({
+					[`Option ${counter}`]: [dayReverseMap[day], time]
+				});
+				counter += 1;
+			}
+		}
+	}
+
+	return options;
+}
+
+function getCombinations(arr: string[], size: number): string[][] {
+	if (size === 0) return [[]];
+	if (size > arr.length) return [];
+	if (size === 1) return arr.map((v) => [v]);
+	const combos: string[][] = [];
+	for (let i = 0; i < arr.length; i++) {
+		const rest = getCombinations(arr.slice(i + 1), size - 1);
+		for (const r of rest) {
+			combos.push([arr[i], ...r]);
+		}
+	}
+	return combos;
+}
+
+export async function fetchCrabfitData(apiUrl): Promise<Member[]> {
+	const res = await fetch(`${apiUrl}/people`);
+	return res.json();
+}
+
+export async function filterMemberData(members: string[], memberData: Member[]): Promise<Member[]> {
+	return members.map((name: string) => memberData.find((m) => m.name === name)).filter(Boolean);
+}

src/routes/+layout.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+	import '../app.css';
+
+	let { children } = $props();
+</script>
+
+{@render children()}

src/routes/+page.server.ts

@@ -0,0 +1,38 @@
+import { fail } from '@sveltejs/kit';
+// import type { Actions } from './$types';
+import { getCrabfitData } from '$lib/crabfitData';
+import { findMeetingOptions, filterMemberData } from '$lib/meeting';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async ({ fetch }) => {
+	const res = await fetch('/api/members');
+	const data = await res.json();
+	return { members: data.names };
+};
+
+export const actions: Actions = {
+	getMeetings: async ({ request }) => {
+		const form = await request.formData();
+
+		const selectedMembers = form.getAll('selectedMembers');
+		const days = form.getAll('selectedDays');
+		// const number = form.get('number');
+		const number = 1;
+
+		if (!selectedMembers) return fail(500, { success: false, error: 'Select a member' });
+		if (!days) return fail(500, { success: false, error: 'Select a day' });
+
+		try {
+			const crabfit = await getCrabfitData();
+
+			const members = await filterMemberData(selectedMembers, crabfit);
+
+			const options = findMeetingOptions(members, { days, number });
+
+			return { success: true, options };
+		} catch (err) {
+			console.error('findMeetingOptions error:', err);
+			return fail(500, { success: false, error: 'Failed to fetch meetings' });
+		}
+	}
+};

src/routes/+page.svelte

@@ -0,0 +1,206 @@
+<script lang="ts">
+	import { enhance } from '$app/forms';
+	import { Copy } from '@lucide/svelte';
+	import type { PageProps } from './$types';
+	import ClickSpark from '$lib/components/ClickSpark.svelte';
+
+	let { data }: PageProps = $props();
+
+	// let members: string[] = $state(data.members);
+	let selectedDays: string[] = $state([]);
+	let lastSelectedDays = $state([]);
+	let selectedMembers: string[] = $state([]);
+	let number = $state(1);
+	let form: HTMLFormElement;
+	let noMeetings = $state(false);
+	let meetingOptions: { [optionName: string]: [string, string] }[] = $state([]);
+
+	let sparkRef;
+
+	const daysOfTheWeek = [
+		'Monday',
+		'Tuesday',
+		'Wednesday',
+		'Thursday',
+		'Friday',
+		'Saturday',
+		'Sunday'
+	];
+
+	const weekdays = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'];
+
+	function updateMeetings() {
+		noMeetings = false;
+		if (selectedDays.length > 0 && selectedMembers.length > 0) {
+			if (form) form.requestSubmit();
+		} else {
+			meetingOptions = [];
+		}
+	}
+
+	function sortByDay(options) {
+		const grouped = {};
+
+		for (const option of options) {
+			for (const [optName, [day, time]] of Object.entries(option)) {
+				if (!grouped[day]) grouped[day] = [];
+				grouped[day].push(time);
+			}
+		}
+
+		for (const day in grouped) {
+			grouped[day].sort();
+		}
+
+		return grouped;
+	}
+
+	function formatTime(time: string) {
+		const t = time.split('');
+		return `${t[0]}${t[1]}:${t[2]}${t[3]}`;
+	}
+
+	function copyOptions(e) {
+		const membs = selectedMembers.reduce((prev, curr) => `${prev}, ${curr}`);
+		let text = `Meeting times for ${membs}\n`;
+		meetingOptions.forEach((opt, i) => {
+			const [day, time] = Object.values(opt)[0];
+			text += `${day} at ${formatTime(time)}\n`;
+		});
+
+		navigator.clipboard.writeText(text);
+		sparkRef.triggerSpark(e);
+	}
+</script>
+
+<div class="flex flex-col items-center justify-center gap-8 px-8 pt-8 pb-20">
+	<div>
+		<form
+			class="flex flex-wrap gap-8 md:gap-24"
+			bind:this={form}
+			id="meeting-form"
+			method="POST"
+			action="?/getMeetings"
+			use:enhance={({ formElement, formData, action, cancel, submitter }) => {
+				return async ({ result, update }) => {
+					if (result.type === 'success') {
+						meetingOptions = result.data.options;
+						if (meetingOptions.length === 0) noMeetings = true;
+					}
+
+					if (result.type === 'error' || result.type === 'failure') {
+						meetingOptions = [];
+					}
+				};
+			}}
+		>
+			<div class="flex flex-col gap-4">
+				<ul class="menu-horizontal rounded-box bg-base-200">
+					<li class="menu-title">Select</li>
+					<li>
+						<button
+							onclick={() => {
+								if (selectedDays.toString() === weekdays.toString()) {
+									selectedDays = [...lastSelectedDays];
+								} else {
+									lastSelectedDays = [...selectedDays];
+									selectedDays = [...weekdays];
+								}
+							}}
+							class="btn">Weekdays</button
+						>
+					</li>
+					<li>
+						<button
+							onclick={() => {
+								if (selectedDays.toString() === daysOfTheWeek.toString()) {
+									selectedDays = [...lastSelectedDays];
+								} else {
+									lastSelectedDays = [...selectedDays];
+									selectedDays = [...daysOfTheWeek];
+								}
+							}}
+							class="btn">All</button
+						>
+					</li>
+					<li>
+						<button
+							onclick={() => {
+								if (selectedDays.toString() === '') {
+									selectedDays = [...lastSelectedDays];
+								} else {
+									lastSelectedDays = [...selectedDays];
+									selectedDays = [];
+								}
+							}}
+							class="btn">None</button
+						>
+					</li>
+				</ul>
+
+				<fieldset id="day-select" class="fieldset flex flex-col gap-3">
+					<legend class="fieldset-legend text-xl">Which days</legend>
+					{#each daysOfTheWeek as day}
+						<label class="label gap-3 text-xl text-base-content select-none"
+							><input
+								class="checkbox checkbox-lg checkbox-secondary"
+								type="checkbox"
+								bind:group={selectedDays}
+								onchange={updateMeetings}
+								name="selectedDays"
+								value={day}
+							/>{day}</label
+						>
+					{/each}
+				</fieldset>
+			</div>
+
+			<fieldset id="member-select" class="fieldset flex flex-col gap-3">
+				<legend class="fieldset-legend text-xl">Which members</legend>
+
+				{#each data.members as member}
+					<label class="label gap-3 text-xl text-base-content select-none"
+						><input
+							class="checkbox checkbox-lg checkbox-primary"
+							type="checkbox"
+							bind:group={selectedMembers}
+							onchange={updateMeetings}
+							value={member}
+							name="selectedMembers"
+						/>{member}</label
+					>
+				{/each}
+			</fieldset>
+		</form>
+	</div>
+
+	<div class="divider"><h2 class="text-2xl">Possible meeting times</h2></div>
+
+	<div>
+		{#if meetingOptions.length > 0}
+			<button class="btn absolute right-5 sm:right-20" onclick={copyOptions}><Copy /> </button>
+			<div class="flex flex-wrap justify-center gap-8 md:gap-4">
+				{#each Object.entries(sortByDay(meetingOptions)) as [day, times]}
+					<ul class="list h-fit w-56 rounded-box bg-base-200 shadow-md sm:w-fit">
+						<h3 class="divide-y-2 rounded-t-box bg-base-300 px-8 py-4 text-center text-2xl">
+							{day}
+						</h3>
+						{#each times as time}
+							<li
+								class="list-row flex justify-center divide-y-2 rounded-box text-2xl font-extralight tabular-nums"
+							>
+								{formatTime(time)}
+							</li>
+						{/each}
+					</ul>
+				{/each}
+			</div>
+		{:else if noMeetings}
+			<p class="text-lg font-semibold">No meeting options found</p>
+		{:else}
+			<p class="text-lg font-semibold">Select days and members first</p>
+		{/if}
+	</div>
+</div>
+
+<ClickSpark bind:this={sparkRef} />

src/routes/api/members/+server.ts

@@ -0,0 +1,12 @@
+import type { RequestHandler } from '@sveltejs/kit';
+import { getCrabfitData } from '$lib/crabfitData';
+
+export const GET: RequestHandler = async () => {
+	const crabfitData = await getCrabfitData();
+
+	const names = crabfitData.map((m) => m.name);
+
+	return new Response(JSON.stringify({ names }), {
+		headers: { 'Content-Type': 'application/json' }
+	});
+};

src/routes/page.html

@@ -0,0 +1,96 @@
+<script lang="ts">
+	import { options } from '../../.svelte-kit/generated/server/internal.js';
+	import { enhance } from '$app/forms';
+	import { onMount } from 'svelte';
+
+	let members: string[] = $state([]);
+	let selectedDay = $state('Mon');
+	let selectedMembers: string[] = $state([]);
+	let number = $state(1);
+	let form: HTMLFormElement;
+
+	let meetingOptions: { [optionName: string]: [string, string] }[] = $state([]);
+
+	// Fetch members on mount
+	onMount(async () => {
+		const res = await fetch('/api/members');
+		const data = await res.json();
+		members = data.names;
+	});
+
+	function updateMeetings() {
+		if (form) form.requestSubmit();
+	}
+</script>
+
+<form
+	bind:this="{form}"
+	id="meeting-form"
+	method="POST"
+	action="?/getMeetings"
+	use:enhance="{({"
+	formElement,
+	formData,
+	action,
+	cancel,
+	submitter
+	})=""
+>
+	{ return async ({ result, update }) => { if (result.type === 'success') { meetingOptions =
+	result.data; } if (result.type === 'error' || result.type === 'failure') { meetingOptions = []; }
+	}; }} >
+	<div>
+		<label for="day-select">Select day of week:</label>
+		<select id="day-select" name="days" bind:value="{selectedDay}" onchange="{updateMeetings}">
+			<option>Mon</option>
+			<option>Tue</option>
+			<option>Wed</option>
+			<option>Thu</option>
+			<option>Fri</option>
+			<option>Sat</option>
+			<option>Sun</option>
+		</select>
+	</div>
+
+	<div>
+		<label>Select members:</label>
+		{#if members.length === 0}
+		<p>Loading members...</p>
+		{:else}
+		<select multiple bind:value="{members}">
+			{#each members as member}
+			<option value="{member}">{member}</option>
+			{/each}
+		</select>
+		{/if}
+	</div>
+
+	<div>
+		<label for="number-input">Number of meetings:</label>
+		<input
+			id="number-input"
+			type="number"
+			name="number"
+			min="1"
+			bind:value="{number}"
+			onchange="{updateMeetings}"
+		/>
+	</div>
+
+	<!-- Hidden inputs for comma-separated values -->
+	<!-- <input type="hidden" name="members" value={selectedMembers.join(',')} />
+	<input type="hidden" name="days" value={selectedDay} /> -->
+</form>
+
+<div>
+	<h2>Possible meeting times:</h2>
+	{#if meetingOptions.length > 0}
+	<ul>
+		{#each meetingOptions as option, i} {#each Object.entries(option) as [optName, [day, time]]}
+		<li><strong>{optName}</strong>: {day} at {time}</li>
+		{/each} {/each}
+	</ul>
+	{:else}
+	<p>No meeting options found.</p>
+	{/if}
+</div>

src/test/meeting.test.ts

@@ -0,0 +1,107 @@
+import { describe, it, expect, vi } from 'vitest';
+import { fetchCrabfitData, filterMemberData, findMeetingOptions } from '$lib/meeting';
+
+// vi.mock('node-fetch', async () => ({
+// 	default: vi.fn(() =>
+// 		Promise.resolve({
+// 			json: () => Promise.resolve(mockData)
+// 		})
+// 	)
+// }));
+const mockData = [
+	{
+		name: 'Alice',
+		availability: ['1100-1', '1115-1', '1130-1', '1100-2'],
+		created_at: 1000000000
+	},
+	{
+		name: 'Bob',
+		availability: ['1100-1', '1400-1', '1500-1'],
+		created_at: 1000000001
+	},
+	// Charlie has no times on Monday, but does on Tuesdays
+	{
+		name: 'Charlie',
+		availability: ['2000-1', '1100-2'],
+		created_at: 1000000002
+	}
+];
+
+const testData = [
+	{
+		name: 'B',
+		availability: ['0900-1', '0915-1', '0930-1', '0945-1', '1000-1', '1015-1', '1030-1', '1045-1'],
+		created_at: 1753176466
+	},
+	{
+		name: 'A',
+		availability: ['0800-1', '0815-1', '0830-1', '0845-1', '0900-1', '0915-1', '0930-1', '0945-1'],
+		created_at: 1753176450
+	}
+];
+
+const CRABFIT_TEST_API_URL = 'https://api.crab.fit/event/schedulertestdata-850919';
+
+describe('findMeetingOptions', () => {
+	it('returns options correctly', async () => {
+		const options = await findMeetingOptions([mockData[0], mockData[1]], {
+			days: ['Monday'],
+			number: 1
+		});
+		expect(options).toEqual([{ 'Option 1': ['Monday', '1100'] }]);
+	});
+
+	it('returns options correctly', async () => {
+		const options = await findMeetingOptions([mockData[0], mockData[2]], {
+			days: ['Tuesday'],
+			number: 1
+		});
+		expect(options).toEqual([{ 'Option 1': ['Tuesday', '1100'] }]);
+	});
+
+	it('returns no options for impossible constraints', async () => {
+		const options = await findMeetingOptions([mockData[0], mockData[2]], {
+			days: ['Monday'],
+			number: 1
+		});
+		expect(options).toEqual([]);
+	});
+});
+
+describe('filterMemberData', () => {
+	it('filters member data', async () => {
+		const members = ['A', 'B'];
+		const result = await filterMemberData(members, testData);
+		expect(result).toEqual(expect.arrayContaining(testData));
+	});
+});
+
+describe('fetchCrabfitData', () => {
+	it('gets member data', async () => {
+		expect(await fetchCrabfitData(CRABFIT_TEST_API_URL)).toEqual(testData);
+	});
+});
+
+describe('integration', () => {
+	it('finds meetings with fetched data', async () => {
+		const crabfitData = await fetchCrabfitData(CRABFIT_TEST_API_URL);
+		const members = ['A', 'B'];
+		const memberData = await filterMemberData(members, crabfitData);
+
+		const options = await findMeetingOptions(memberData, {
+			days: ['Monday'],
+			number: 1
+		});
+		expect(options).toEqual([{ 'Option 1': ['Monday', '0900'] }]);
+	});
+	it('finds meetings with test data', async () => {
+		const members = ['A', 'B'];
+		const memberData = await filterMemberData(members, testData);
+
+		const options = await findMeetingOptions(memberData, {
+			days: ['Monday'],
+			number: 1
+		});
+		expect(options).toEqual([{ 'Option 1': ['Monday', '0900'] }]);
+	});
+});

static/favicon.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="107" height="128" viewBox="0 0 107 128"><title>svelte-logo</title><path d="M94.157 22.819c-10.4-14.885-30.94-19.297-45.792-9.835L22.282 29.608A29.92 29.92 0 0 0 8.764 49.65a31.5 31.5 0 0 0 3.108 20.231 30 30 0 0 0-4.477 11.183 31.9 31.9 0 0 0 5.448 24.116c10.402 14.887 30.942 19.297 45.791 9.835l26.083-16.624A29.92 29.92 0 0 0 98.235 78.35a31.53 31.53 0 0 0-3.105-20.232 30 30 0 0 0 4.474-11.182 31.88 31.88 0 0 0-5.447-24.116" style="fill:#ff3e00"/><path d="M45.817 106.582a20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.503 18 18 0 0 1 .624-2.435l.49-1.498 1.337.981a33.6 33.6 0 0 0 10.203 5.098l.97.294-.09.968a5.85 5.85 0 0 0 1.052 3.878 6.24 6.24 0 0 0 6.695 2.485 5.8 5.8 0 0 0 1.603-.704L69.27 76.28a5.43 5.43 0 0 0 2.45-3.631 5.8 5.8 0 0 0-.987-4.371 6.24 6.24 0 0 0-6.698-2.487 5.7 5.7 0 0 0-1.6.704l-9.953 6.345a19 19 0 0 1-5.296 2.326 20.72 20.72 0 0 1-22.237-8.243 19.17 19.17 0 0 1-3.277-14.502 17.99 17.99 0 0 1 8.13-12.052l26.081-16.623a19 19 0 0 1 5.3-2.329 20.72 20.72 0 0 1 22.237 8.243 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-.624 2.435l-.49 1.498-1.337-.98a33.6 33.6 0 0 0-10.203-5.1l-.97-.294.09-.968a5.86 5.86 0 0 0-1.052-3.878 6.24 6.24 0 0 0-6.696-2.485 5.8 5.8 0 0 0-1.602.704L37.73 51.72a5.42 5.42 0 0 0-2.449 3.63 5.79 5.79 0 0 0 .986 4.372 6.24 6.24 0 0 0 6.698 2.486 5.8 5.8 0 0 0 1.602-.704l9.952-6.342a19 19 0 0 1 5.295-2.328 20.72 20.72 0 0 1 22.237 8.242 19.17 19.17 0 0 1 3.277 14.503 18 18 0 0 1-8.13 12.053l-26.081 16.622a19 19 0 0 1-5.3 2.328" style="fill:#fff"/></svg>

svelte.config.js

@@ -0,0 +1,20 @@
+import adapter from '@sveltejs/adapter-node';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	// Consult https://svelte.dev/docs/kit/integrations
+	// for more information about preprocessors
+	preprocess: vitePreprocess(),
+	kit: {
+		adapter: adapter({ out: 'build' }),
+		env: {
+			dir: "./"
+		},
+		alias: {
+			$src: "./src",
+		}
+	},
+};
+
+export default config;

tsconfig.json

@@ -0,0 +1,19 @@
+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"allowJs": true,
+		"checkJs": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"sourceMap": true,
+		"strict": true,
+		"moduleResolution": "bundler"
+	}
+	// Path aliases are handled by https://svelte.dev/docs/kit/configuration#alias
+	// except $lib which is handled by https://svelte.dev/docs/kit/configuration#files
+	//
+	// If you want to overwrite includes/excludes, make sure to copy over the relevant includes/excludes
+	// from the referenced tsconfig.json - TypeScript does not merge them in
+}

vite.config.ts

@@ -0,0 +1,20 @@
+import tailwindcss from '@tailwindcss/vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [tailwindcss(), sveltekit()],
+	test: {
+		projects: [
+			{
+				extends: './vite.config.ts',
+				test: {
+					name: 'server',
+					environment: 'node',
+					include: ['src/**/*.{test,spec}.{js,ts}'],
+					exclude: ['src/**/*.svelte.{test,spec}.{js,ts}']
+				}
+			}
+		]
+	}
+});