feat: add lottery generator
Adds /generators/lottery/ with configurable range and pick count. Partial Fisher-Yates shuffle guarantees unique draws, results sorted ascending and displayed as numbered balls with clipboard copy. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
emil
co-authored by
Claude Sonnet 4.6
Claude Sonnet 4.6
parent
9772f04f23
commit
09f593a062
@@ -0,0 +1,179 @@
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---
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// Interactive lottery generator — runs on the client via inline script
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---
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<div id="lottery-generator" class="mt-8">
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<div class="grid grid-cols-1 sm:grid-cols-3 gap-4">
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<div>
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<label for="lg-from" class="block text-sm font-medium text-zinc-400 mb-1">From</label>
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<input
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id="lg-from"
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type="number"
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value="1"
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class="w-full bg-zinc-900 border border-zinc-700 rounded-lg px-3 py-2 text-zinc-100 text-base focus:outline-none focus:border-[#534AB7] focus:ring-1 focus:ring-[#534AB7] transition-colors"
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aria-label="Range start"
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/>
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</div>
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<div>
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<label for="lg-to" class="block text-sm font-medium text-zinc-400 mb-1">To</label>
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<input
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id="lg-to"
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type="number"
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value="49"
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class="w-full bg-zinc-900 border border-zinc-700 rounded-lg px-3 py-2 text-zinc-100 text-base focus:outline-none focus:border-[#534AB7] focus:ring-1 focus:ring-[#534AB7] transition-colors"
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aria-label="Range end"
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/>
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</div>
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<div>
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<label for="lg-pick" class="block text-sm font-medium text-zinc-400 mb-1">Pick</label>
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<input
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id="lg-pick"
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type="number"
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value="6"
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min="1"
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class="w-full bg-zinc-900 border border-zinc-700 rounded-lg px-3 py-2 text-zinc-100 text-base focus:outline-none focus:border-[#534AB7] focus:ring-1 focus:ring-[#534AB7] transition-colors"
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aria-label="How many numbers to pick"
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/>
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</div>
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</div>
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<p
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id="lg-error"
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role="alert"
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aria-live="polite"
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class="mt-3 text-sm text-red-500 hidden"
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></p>
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<div class="my-10 min-h-24 flex flex-col items-center justify-center gap-4">
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<div
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id="lg-result"
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class="flex flex-wrap justify-center gap-2"
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aria-live="polite"
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aria-label="Lottery result"
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></div>
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<button
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id="lg-copy-btn"
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type="button"
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aria-label="Copy numbers to clipboard"
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class="invisible inline-flex items-center gap-1.5 text-xs font-medium text-zinc-500 hover:text-zinc-200 transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-[#534AB7] rounded"
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>
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<span id="lg-copy-label">Copy</span>
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<span id="lg-copy-icon" aria-hidden="true">
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<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
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<rect width="14" height="14" x="8" y="8" rx="2" ry="2"/>
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<path d="M4 16c-1.1 0-2-.9-2-2V4c0-1.1.9-2 2-2h10c1.1 0 2 .9 2 2"/>
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</svg>
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</span>
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<span id="lg-check-icon" class="hidden text-[#534AB7]" aria-hidden="true">
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<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
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<path d="M20 6 9 17l-5-5"/>
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</svg>
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</span>
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</button>
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</div>
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<div class="flex justify-center">
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<button
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id="lg-btn"
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type="button"
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class="w-full sm:w-auto px-8 py-3 bg-[#534AB7] text-white font-semibold rounded-lg hover:bg-[#4740a0] active:bg-[#3d3990] focus:outline-none focus-visible:ring-2 focus-visible:ring-[#534AB7] focus-visible:ring-offset-2 focus-visible:ring-offset-zinc-950 transition-colors duration-100 cursor-pointer"
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>
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Draw
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</button>
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</div>
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</div>
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<script>
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const fromInput = document.getElementById('lg-from') as HTMLInputElement;
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const toInput = document.getElementById('lg-to') as HTMLInputElement;
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const pickInput = document.getElementById('lg-pick') as HTMLInputElement;
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const btn = document.getElementById('lg-btn') as HTMLButtonElement;
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const copyBtn = document.getElementById('lg-copy-btn') as HTMLButtonElement;
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const resultEl = document.getElementById('lg-result') as HTMLDivElement;
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const errorEl = document.getElementById('lg-error') as HTMLParagraphElement;
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const copyLabel = document.getElementById('lg-copy-label') as HTMLSpanElement;
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const copyIcon = document.getElementById('lg-copy-icon') as HTMLSpanElement;
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const checkIcon = document.getElementById('lg-check-icon') as HTMLSpanElement;
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let copyRevertTimer: ReturnType<typeof setTimeout> | null = null;
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function isInteger(val: string) {
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return /^-?\d+$/.test(val.trim());
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}
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function showError(msg: string) {
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errorEl.textContent = msg;
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errorEl.classList.remove('hidden');
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}
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function clearError() {
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errorEl.textContent = '';
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errorEl.classList.add('hidden');
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}
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function draw() {
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if (!isInteger(fromInput.value) || !isInteger(toInput.value) || !isInteger(pickInput.value)) {
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showError('All values must be whole numbers.');
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return;
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}
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const min = parseInt(fromInput.value, 10);
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const max = parseInt(toInput.value, 10);
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const pick = parseInt(pickInput.value, 10);
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const pool = max - min + 1;
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if (min >= max) { showError('"From" must be less than "To".'); return; }
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if (pick < 1) { showError('"Pick" must be at least 1.'); return; }
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if (pick > pool) { showError(`Cannot pick ${pick} unique numbers from a range of ${pool}.`); return; }
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clearError();
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// Fisher-Yates partial shuffle — O(pick)
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const nums = Array.from({ length: pool }, (_, i) => min + i);
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for (let i = 0; i < pick; i++) {
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const j = i + Math.floor(Math.random() * (pool - i));
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[nums[i], nums[j]] = [nums[j], nums[i]];
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}
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const picked = nums.slice(0, pick).sort((a, b) => a - b);
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resultEl.innerHTML = '';
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picked.forEach((n, idx) => {
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const ball = document.createElement('span');
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ball.textContent = String(n);
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ball.className =
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'inline-flex items-center justify-center min-w-[2.5rem] h-10 px-2 rounded-full bg-[#534AB7]/15 border border-[#534AB7]/40 text-zinc-100 font-bold tabular-nums text-sm';
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ball.style.animationDelay = `${idx * 40}ms`;
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resultEl.appendChild(ball);
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});
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copyBtn.classList.remove('invisible');
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copyLabel.textContent = 'Copy';
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}
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async function copyNumbers() {
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const balls = resultEl.querySelectorAll('span');
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const value = Array.from(balls).map((b) => b.textContent).join(', ');
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if (!value) return;
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await navigator.clipboard.writeText(value);
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copyIcon.classList.add('hidden');
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checkIcon.classList.remove('hidden');
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copyLabel.textContent = 'Copied';
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if (copyRevertTimer) clearTimeout(copyRevertTimer);
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copyRevertTimer = setTimeout(() => {
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checkIcon.classList.add('hidden');
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copyIcon.classList.remove('hidden');
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copyLabel.textContent = 'Copy';
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}, 1500);
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}
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btn.addEventListener('click', draw);
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copyBtn.addEventListener('click', copyNumbers);
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[fromInput, toInput, pickInput].forEach((input) => {
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input.addEventListener('keydown', (e) => { if (e.key === 'Enter') draw(); });
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});
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</script>
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@@ -33,7 +33,7 @@ export const generators: Generator[] = [
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title: 'Lottery',
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description: 'Draw a set of unique numbers for lottery-style picks.',
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icon: 'ticket',
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status: 'coming-soon',
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status: 'live',
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},
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{
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slug: 'dice',
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@@ -0,0 +1,63 @@
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---
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import BaseLayout from '../../layouts/BaseLayout.astro';
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import LotteryGenerator from '../../components/generators/LotteryGenerator.astro';
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import AdBanner from '../../components/AdBanner.astro';
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import { generators } from '../../data/generators';
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const generator = generators.find((g) => g.slug === 'lottery')!;
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---
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<BaseLayout
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title={`${generator.title} Generator — Randify`}
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description={generator.description}
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>
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<div class="max-w-2xl mx-auto px-4 py-12 sm:py-20">
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<nav aria-label="Breadcrumb" class="mb-10">
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<a
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href="/"
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class="inline-flex items-center gap-1.5 text-sm text-zinc-500 hover:text-zinc-200 transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-[#534AB7] rounded"
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aria-label="Back to all generators"
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>
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<svg
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xmlns="http://www.w3.org/2000/svg"
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width="14"
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height="14"
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viewBox="0 0 24 24"
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fill="none"
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stroke="currentColor"
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stroke-width="2.5"
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stroke-linecap="round"
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stroke-linejoin="round"
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aria-hidden="true"
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>
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<path d="m15 18-6-6 6-6"/>
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</svg>
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All generators
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</a>
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</nav>
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<header class="mb-2">
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<div class="flex items-center gap-2 mb-4">
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<span
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class="inline-block w-2.5 h-2.5 rounded-full bg-[#534AB7]"
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aria-hidden="true"
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></span>
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<span class="text-sm font-medium text-zinc-400 uppercase tracking-widest">randify</span>
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</div>
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<h1 class="text-3xl sm:text-4xl font-bold text-zinc-100">
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{generator.title} Generator
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</h1>
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<p class="mt-2 text-base text-zinc-400">{generator.description}</p>
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</header>
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<main>
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<LotteryGenerator />
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</main>
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<div class="mt-12 grid grid-cols-3 gap-3">
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<AdBanner size="tile" />
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<AdBanner size="tile" />
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<AdBanner size="tile" />
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</div>
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</div>
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</BaseLayout>
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