feat: gambling (coinflip & slots)
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38 changed files with 5631 additions and 1 deletions
491
website/src/lib/components/self/games/Coinflip.svelte
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491
website/src/lib/components/self/games/Coinflip.svelte
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@ -0,0 +1,491 @@
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<script lang="ts">
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// https://github.com/gre/bezier-easing
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// BezierEasing - use bezier curve for transition easing function
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// by Gaëtan Renaudeau 2014 - 2015 – MIT License
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// These values are established by empiricism with tests (tradeoff: performance VS precision)
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const NEWTON_ITERATIONS = 4;
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const NEWTON_MIN_SLOPE = 0.001;
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const SUBDIVISION_PRECISION = 0.0000001;
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const SUBDIVISION_MAX_ITERATIONS = 10;
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const kSplineTableSize = 11;
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const kSampleStepSize = 1.0 / (kSplineTableSize - 1.0);
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const float32ArraySupported = typeof Float32Array === 'function';
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function A(aA1: number, aA2: number) {
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return 1.0 - 3.0 * aA2 + 3.0 * aA1;
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}
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function B(aA1: number, aA2: number) {
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return 3.0 * aA2 - 6.0 * aA1;
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}
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function C(aA1: number) {
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return 3.0 * aA1;
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}
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// Returns x(t) given t, x1, and x2, or y(t) given t, y1, and y2.
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function calcBezier(aT: number, aA1: number, aA2: number) {
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return ((A(aA1, aA2) * aT + B(aA1, aA2)) * aT + C(aA1)) * aT;
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}
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// Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2.
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function getSlope(aT: number, aA1: number, aA2: number) {
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return 3.0 * A(aA1, aA2) * aT * aT + 2.0 * B(aA1, aA2) * aT + C(aA1);
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}
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function binarySubdivide(aX: number, aA: number, aB: number, mX1: number, mX2: number) {
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let currentX,
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currentT,
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i = 0;
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do {
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currentT = aA + (aB - aA) / 2.0;
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currentX = calcBezier(currentT, mX1, mX2) - aX;
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if (currentX > 0.0) {
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aB = currentT;
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} else {
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aA = currentT;
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}
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} while (Math.abs(currentX) > SUBDIVISION_PRECISION && ++i < SUBDIVISION_MAX_ITERATIONS);
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return currentT;
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}
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function newtonRaphsonIterate(aX: number, aGuessT: number, mX1: number, mX2: number) {
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for (let i = 0; i < NEWTON_ITERATIONS; ++i) {
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const currentSlope = getSlope(aGuessT, mX1, mX2);
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if (currentSlope === 0.0) {
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return aGuessT;
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}
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const currentX = calcBezier(aGuessT, mX1, mX2) - aX;
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aGuessT -= currentX / currentSlope;
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}
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return aGuessT;
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}
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function LinearEasing(x: number) {
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return x;
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}
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function bezier(mX1: number, mY1: number, mX2: number, mY2: number): (x: number) => number {
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if (!(0 <= mX1 && mX1 <= 1 && 0 <= mX2 && mX2 <= 1)) {
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throw new Error('bezier x values must be in [0, 1] range');
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}
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if (mX1 === mY1 && mX2 === mY2) {
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return LinearEasing;
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}
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// Precompute samples table
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const sampleValues: Float32Array | number[] = float32ArraySupported
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? new Float32Array(kSplineTableSize)
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: new Array(kSplineTableSize);
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for (let i = 0; i < kSplineTableSize; ++i) {
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sampleValues[i] = calcBezier(i * kSampleStepSize, mX1, mX2);
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}
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function getTForX(aX: number) {
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let intervalStart = 0.0;
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let currentSample = 1;
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const lastSample = kSplineTableSize - 1;
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for (; currentSample !== lastSample && sampleValues[currentSample] <= aX; ++currentSample) {
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intervalStart += kSampleStepSize;
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}
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--currentSample;
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// Interpolate to provide an initial guess for t
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const dist =
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(aX - sampleValues[currentSample]) /
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(sampleValues[currentSample + 1] - sampleValues[currentSample]);
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const guessForT = intervalStart + dist * kSampleStepSize;
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const initialSlope = getSlope(guessForT, mX1, mX2);
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if (initialSlope >= NEWTON_MIN_SLOPE) {
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return newtonRaphsonIterate(aX, guessForT, mX1, mX2);
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} else if (initialSlope === 0.0) {
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return guessForT;
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} else {
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return binarySubdivide(aX, intervalStart, intervalStart + kSampleStepSize, mX1, mX2);
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}
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}
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return function BezierEasing(x: number) {
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// Because JavaScript number are imprecise, we should guarantee the extremes are right.
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if (x === 0 || x === 1) {
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return x;
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}
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return calcBezier(getTForX(x), mY1, mY2);
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};
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}
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function getNormalizedTimeForProgress(
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targetProgress: number,
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easingFunction: (t: number) => number,
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tolerance = 0.0001,
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maxIterations = 100
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): number {
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if (targetProgress <= 0) return 0;
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if (targetProgress >= 1) return 1;
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let minT = 0;
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let maxT = 1;
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let t = 0.5;
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for (let i = 0; i < maxIterations; i++) {
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const currentProgress = easingFunction(t);
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const error = currentProgress - targetProgress;
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if (Math.abs(error) < tolerance) {
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return t;
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}
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if (error < 0) {
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minT = t;
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} else {
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maxT = t;
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}
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t = (minT + maxT) / 2;
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}
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return t;
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}
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// --- End of bezier-easing code ---
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import { Button } from '$lib/components/ui/button';
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import { Input } from '$lib/components/ui/input';
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import {
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Card,
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CardContent,
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CardDescription,
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CardHeader,
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CardTitle
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} from '$lib/components/ui/card';
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import confetti from 'canvas-confetti';
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import { toast } from 'svelte-sonner';
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import { formatValue, playSound, showConfetti } from '$lib/utils';
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interface CoinflipResult {
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won: boolean;
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result: 'heads' | 'tails';
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newBalance: number;
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payout: number;
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amountWagered: number;
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}
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const cssEaseInOut = bezier(0.42, 0, 0.58, 1.0);
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let {
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balance = $bindable(),
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onBalanceUpdate
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}: {
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balance: number;
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onBalanceUpdate?: (newBalance: number) => void;
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} = $props();
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let betAmount = $state(10);
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let selectedSide = $state('heads');
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let isFlipping = $state(false);
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let coinRotation = $state(0);
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let lastResult = $state<CoinflipResult | null>(null);
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let activeSoundTimeouts = $state<NodeJS.Timeout[]>([]);
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let canBet = $derived(betAmount > 0 && betAmount <= balance && !isFlipping);
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function selectSide(side: string) {
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if (!isFlipping) {
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selectedSide = side;
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}
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}
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function setBetAmount(amount: number) {
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if (amount >= 0 && amount <= balance) {
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betAmount = amount;
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}
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}
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async function flipCoin() {
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if (!canBet) return;
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isFlipping = true;
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lastResult = null;
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activeSoundTimeouts.forEach(clearTimeout);
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activeSoundTimeouts = [];
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try {
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const response = await fetch('/api/gambling/coinflip', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json'
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},
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body: JSON.stringify({
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side: selectedSide,
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amount: betAmount
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})
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});
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if (!response.ok) {
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const errorData = await response.json();
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throw new Error(errorData.error || 'Failed to place bet');
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}
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const resultData: CoinflipResult = await response.json();
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const baseSpinsDegrees = 1800;
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const currentRotationValue = coinRotation;
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let rotationDeltaForThisFlip = baseSpinsDegrees;
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const faceAfterBaseSpins =
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(currentRotationValue + baseSpinsDegrees) % 360 < 180 ? 'heads' : 'tails';
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if (faceAfterBaseSpins !== resultData.result) {
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rotationDeltaForThisFlip += 180;
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}
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if (rotationDeltaForThisFlip === 0) {
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rotationDeltaForThisFlip = 360;
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}
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coinRotation = currentRotationValue + rotationDeltaForThisFlip;
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const animationDuration = 2000;
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if (rotationDeltaForThisFlip >= 180) {
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const numHalfSpins = Math.floor(rotationDeltaForThisFlip / 180);
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for (let i = 1; i <= numHalfSpins; i++) {
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const targetEasedProgress = (i * 180) / rotationDeltaForThisFlip;
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const normalizedTime = getNormalizedTimeForProgress(targetEasedProgress, cssEaseInOut);
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const timeToPlaySound = normalizedTime * animationDuration;
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const timeoutId = setTimeout(() => {
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playSound('flip');
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}, timeToPlaySound);
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activeSoundTimeouts.push(timeoutId);
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}
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}
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setTimeout(() => {
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balance = resultData.newBalance;
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lastResult = resultData;
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onBalanceUpdate?.(resultData.newBalance);
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if (resultData.won) {
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showConfetti(confetti);
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}
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setTimeout(() => {
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isFlipping = false;
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if (!resultData.won) {
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playSound('lose');
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}
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}, 500);
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}, animationDuration);
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} catch (error) {
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console.error('Coinflip error:', error);
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toast.error('Bet failed', {
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description: error instanceof Error ? error.message : 'Unknown error occurred'
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});
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isFlipping = false;
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activeSoundTimeouts.forEach(clearTimeout);
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activeSoundTimeouts = [];
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}
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}
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</script>
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<Card>
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<CardHeader>
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<CardTitle>Coinflip</CardTitle>
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<CardDescription>Choose heads or tails and double your money!</CardDescription>
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</CardHeader>
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<CardContent>
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<!-- Main Layout: Coin/Balance Left, Controls Right -->
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<div class="grid grid-cols-1 gap-8 md:grid-cols-2">
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<!-- Left Side: Coin, Balance, and Result -->
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<div class="flex flex-col space-y-4">
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<!-- Balance Display -->
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<div class="text-center">
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<p class="text-muted-foreground text-sm">Balance</p>
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<p class="text-2xl font-bold">{formatValue(balance)}</p>
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</div>
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<!-- Coin Animation -->
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<div class="flex justify-center">
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<div class="coin-container">
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<div class="coin" style="transform: rotateY({coinRotation}deg)">
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<div class="coin-face coin-heads">
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<img
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src="/facedev/avif/bliptext.avif"
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alt="Heads"
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class="h-32 w-32 object-contain"
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/>
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</div>
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<div class="coin-face coin-tails">
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<img
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src="/facedev/avif/wattesigma.avif"
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alt="Tails"
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class="h-32 w-32 object-contain"
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/>
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</div>
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</div>
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</div>
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</div>
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<!-- Result Display (Reserve Space) -->
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<div class="flex items-center justify-center text-center">
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{#if lastResult && !isFlipping}
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<div class="bg-muted/50 w-full rounded-lg p-3">
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{#if lastResult.won}
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<p class="text-success font-semibold">WIN</p>
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<p class="text-sm">
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Won {formatValue(lastResult.payout)} on {lastResult.result}
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</p>
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{:else}
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<p class="text-destructive font-semibold">LOSS</p>
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<p class="text-sm">
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Lost {formatValue(lastResult.amountWagered)} on {lastResult.result}
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</p>
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{/if}
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</div>
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{/if}
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</div>
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</div>
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<!-- Right Side: Betting Controls -->
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<div class="space-y-4">
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<!-- Side Selection (Inline) -->
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<div>
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<div class="mb-2 block text-sm font-medium">Choose Side</div>
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<div class="flex gap-3">
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<Button
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variant={selectedSide === 'heads' ? 'default' : 'outline'}
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onclick={() => selectSide('heads')}
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disabled={isFlipping}
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class="side-button h-16 flex-1"
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>
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<div class="text-center">
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<img
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src="/facedev/avif/bliptext.avif"
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alt="Heads"
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class="mx-auto mb-1 h-8 w-8 object-contain"
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/>
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<div>Heads</div>
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</div>
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</Button>
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<Button
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variant={selectedSide === 'tails' ? 'default' : 'outline'}
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onclick={() => selectSide('tails')}
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disabled={isFlipping}
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class="side-button h-16 flex-1"
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>
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<div class="text-center">
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<img
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src="/facedev/avif/wattesigma.avif"
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alt="Tails"
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class="mx-auto mb-1 h-8 w-8 object-contain"
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/>
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<div>Tails</div>
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</div>
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</Button>
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</div>
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</div>
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<!-- Bet Amount -->
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<div>
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<label for="bet-amount" class="mb-2 block text-sm font-medium">Bet Amount</label>
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<Input
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id="bet-amount"
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type="number"
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bind:value={betAmount}
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min="1"
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max={balance}
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disabled={isFlipping}
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/>
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</div>
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<!-- Percentage Quick Actions -->
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<div>
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<div class="grid grid-cols-4 gap-2">
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<Button
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size="sm"
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variant="outline"
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onclick={() => setBetAmount(Math.floor((balance || 0) * 0.25))}
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disabled={isFlipping}>25%</Button
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>
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<Button
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size="sm"
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variant="outline"
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onclick={() => setBetAmount(Math.floor((balance || 0) * 0.5))}
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disabled={isFlipping}>50%</Button
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>
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<Button
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size="sm"
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variant="outline"
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onclick={() => setBetAmount(Math.floor((balance || 0) * 0.75))}
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disabled={isFlipping}>75%</Button
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>
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<Button
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size="sm"
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variant="outline"
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onclick={() => setBetAmount(Math.floor(balance || 0))}
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disabled={isFlipping}>Max</Button
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>
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</div>
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</div>
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<!-- Flip Button -->
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<Button class="h-12 w-full text-lg" onclick={flipCoin} disabled={!canBet}>
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{isFlipping ? 'Flipping...' : 'Flip'}
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</Button>
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</div>
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</div>
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</CardContent>
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</Card>
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<style>
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.coin-container {
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position: relative;
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width: 8rem; /* 128px */
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height: 8rem; /* 128px */
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perspective: 1000px;
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}
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.coin {
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width: 100%;
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height: 100%;
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position: relative;
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transform-style: preserve-3d;
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transition: transform 2s ease-in-out;
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}
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.coin-face {
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position: absolute;
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width: 100%;
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height: 100%;
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backface-visibility: hidden;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.coin-heads {
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transform: rotateY(0deg);
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}
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.coin-tails {
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transform: rotateY(180deg);
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}
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:global(.side-button) {
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box-sizing: border-box !important;
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border: 2px solid transparent !important;
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}
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:global(.side-button[data-variant='outline']) {
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border-color: hsl(var(--border)) !important;
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}
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:global(.side-button[data-variant='default']) {
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border-color: hsl(var(--primary)) !important;
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}
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</style>
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Reference in a new issue