615 lines
20 KiB
TypeScript
615 lines
20 KiB
TypeScript
"use client";
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import { useEffect, useMemo, useState } from "react";
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import {
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AlertTriangle,
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ArrowUpDown,
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BarChart3,
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Check,
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Copy,
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Loader2,
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RefreshCcw,
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} from "lucide-react";
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import { CurrencyIcon } from "@/components/converter/currency-icon";
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import { CurrencySelect } from "@/components/converter/currency-select";
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import { Badge } from "@/components/ui/badge";
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import { Button } from "@/components/ui/button";
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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 "@/components/ui/card";
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import { Input } from "@/components/ui/input";
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import { Separator } from "@/components/ui/separator";
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import { Skeleton } from "@/components/ui/skeleton";
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import { useCryptoMarket } from "@/hooks/use-crypto-market";
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import { useDebouncedValue } from "@/hooks/use-debounced-value";
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import { getDisplaySymbol } from "@/lib/currency-display";
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import { useMarketRates } from "@/hooks/use-market-rates";
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import {
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formatAmount,
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formatInverseRate,
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formatRate,
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formatSignedPercent,
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formatTimestamp,
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formatUsdCompact,
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formatUsdPrice,
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} from "@/lib/format";
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import { buildRateMap, convertAmount } from "@/lib/rates";
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import { cn } from "@/lib/utils";
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import { validateAmount } from "@/lib/validation";
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const DEFAULT_FROM = "USD";
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const DEFAULT_TO = "EUR";
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const QUICK_AMOUNTS = [10, 50, 100, 500, 1000] as const;
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interface ConverterCardProps {
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forcedFromCode?: string;
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forcedToCode?: string;
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onPairChange?: (fromCode: string, toCode: string) => void;
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}
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function ConverterSkeleton() {
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return (
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<Card className="border-border/70">
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<CardHeader>
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<Skeleton className="h-6 w-40" />
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<Skeleton className="h-4 w-72" />
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</CardHeader>
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<CardContent className="space-y-5">
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<div className="space-y-2">
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<Skeleton className="h-4 w-20" />
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<Skeleton className="h-14 w-full rounded-xl" />
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</div>
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<div className="grid gap-3 sm:grid-cols-[1fr_auto_1fr] sm:items-end">
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<Skeleton className="h-20 w-full rounded-xl" />
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<Skeleton className="mx-auto h-10 w-10 rounded-full" />
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<Skeleton className="h-20 w-full rounded-xl" />
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</div>
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<Skeleton className="h-28 w-full rounded-xl" />
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</CardContent>
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</Card>
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);
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}
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function ErrorState({
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message,
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onRetry,
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}: {
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message: string;
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onRetry: () => void;
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}) {
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return (
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<Card className="border-red-500/30 bg-red-500/5">
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<CardContent className="flex flex-col gap-4 p-6">
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<div className="flex items-start gap-3">
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<AlertTriangle className="mt-0.5 h-5 w-5 text-red-300" />
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<div>
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<p className="text-sm font-medium text-red-200">
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Unable to load market rates
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</p>
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<p className="mt-1 text-sm text-red-200/80">{message}</p>
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</div>
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</div>
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<Button
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variant="outline"
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onClick={onRetry}
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className="w-fit border-red-300/30"
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>
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<RefreshCcw className="mr-2 h-4 w-4" />
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Retry
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</Button>
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</CardContent>
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</Card>
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);
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}
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function EmptyState() {
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return (
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<Card className="border-border/70">
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<CardContent className="p-6">
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<p className="text-sm text-muted-foreground">
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No assets are currently available. Please try again shortly.
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</p>
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</CardContent>
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</Card>
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);
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}
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export function ConverterCard({
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forcedFromCode,
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forcedToCode,
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onPairChange,
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}: ConverterCardProps) {
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const { data, error, isLoading, refresh } = useMarketRates();
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const [amountInput, setAmountInput] = useState("1");
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const [fromCode, setFromCode] = useState(DEFAULT_FROM);
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const [toCode, setToCode] = useState(DEFAULT_TO);
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const [isCopied, setIsCopied] = useState(false);
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const debouncedAmount = useDebouncedValue(amountInput, 120);
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const assets = useMemo(() => data?.assets ?? [], [data]);
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const rateMap = useMemo(() => buildRateMap(assets), [assets]);
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useEffect(() => {
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if (!assets.length) {
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return;
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}
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if (!rateMap.has(fromCode)) {
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setFromCode(rateMap.has(DEFAULT_FROM) ? DEFAULT_FROM : assets[0].code);
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}
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if (!rateMap.has(toCode)) {
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const fallback = rateMap.has(DEFAULT_TO)
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? DEFAULT_TO
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: (assets.find((asset) => asset.code !== fromCode)?.code ??
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assets[0].code);
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setToCode(fallback);
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}
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}, [assets, fromCode, toCode, rateMap]);
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useEffect(() => {
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if (!assets.length) {
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return;
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}
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if (forcedFromCode && rateMap.has(forcedFromCode)) {
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setFromCode(forcedFromCode);
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}
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if (forcedToCode && rateMap.has(forcedToCode)) {
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setToCode(forcedToCode);
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}
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}, [assets, forcedFromCode, forcedToCode, rateMap]);
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useEffect(() => {
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onPairChange?.(fromCode, toCode);
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}, [fromCode, toCode, onPairChange]);
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const inputValidation = validateAmount(amountInput);
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const debouncedValidation = validateAmount(debouncedAmount);
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const fromAsset = rateMap.get(fromCode);
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const toAsset = rateMap.get(toCode);
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const convertedValue = useMemo(() => {
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if (!fromAsset || !toAsset || !debouncedValidation.ok) {
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return null;
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}
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return convertAmount(debouncedValidation.value, fromAsset, toAsset);
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}, [fromAsset, toAsset, debouncedValidation]);
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const currentRate = useMemo(() => {
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if (!fromAsset || !toAsset) {
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return null;
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}
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return formatRate(fromAsset, toAsset);
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}, [fromAsset, toAsset]);
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const inverseRate = useMemo(() => {
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if (!fromAsset || !toAsset) {
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return null;
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}
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return formatInverseRate(fromAsset, toAsset);
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}, [fromAsset, toAsset]);
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const handleSwap = () => {
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setFromCode(toCode);
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setToCode(fromCode);
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};
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const marketAsset = useMemo(() => {
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if (toAsset?.type === "crypto") {
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return toAsset;
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}
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if (fromAsset?.type === "crypto") {
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return fromAsset;
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}
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return null;
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}, [fromAsset, toAsset]);
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const {
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data: marketData,
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error: marketError,
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isLoading: isMarketLoading,
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refresh: refreshMarket,
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} = useCryptoMarket(marketAsset?.code ?? null);
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const handleCopyConvertedValue = async () => {
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if (convertedValue === null || !toAsset) {
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return;
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}
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const text = `${formatAmount(convertedValue, toAsset)} ${toAsset.code}`;
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try {
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await navigator.clipboard.writeText(text);
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setIsCopied(true);
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window.setTimeout(() => setIsCopied(false), 1400);
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} catch {
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setIsCopied(false);
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}
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};
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if (isLoading && !data) {
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return <ConverterSkeleton />;
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}
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if (!data && error) {
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return <ErrorState message={error} onRetry={() => void refresh()} />;
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}
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if (!data || assets.length === 0) {
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return <EmptyState />;
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}
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const convertedDisplay =
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convertedValue !== null && toAsset
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? `${formatAmount(convertedValue, toAsset)} ${toAsset.code}`
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: "--";
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const amountError = inputValidation.ok ? null : inputValidation.error;
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const amountPrefix = getDisplaySymbol(fromAsset);
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return (
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<Card className="relative overflow-hidden border-border/70 bg-card/90">
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<CardHeader className="relative z-10 rounded-t-2xl bg-gradient-to-r from-sky-500/10 via-cyan-400/5 to-emerald-500/10 pb-4 sm:pb-5">
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<div className="flex flex-wrap items-center justify-between gap-2">
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<CardTitle className="text-2xl font-semibold tracking-tight">
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Currency Converter
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</CardTitle>
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<Badge
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variant="outline"
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className="max-w-full border-border/70 bg-background/50 text-[11px] sm:text-xs"
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>
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<span className="inline-flex items-center gap-1 whitespace-nowrap sm:hidden">
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<span className="text-muted-foreground">Data sources:</span>
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<a
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href="https://frankfurter.dev/"
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target="_blank"
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rel="noreferrer"
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className="text-foreground transition-colors hover:text-cyan-100"
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>
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{data.sources.fiat}
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</a>
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<span className="text-muted-foreground">•</span>
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<a
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href="https://www.coingecko.com/"
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target="_blank"
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rel="noreferrer"
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className="text-foreground transition-colors hover:text-cyan-100"
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>
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{data.sources.crypto}
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</a>
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</span>
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<span className="hidden items-center gap-1 whitespace-nowrap sm:inline-flex">
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<span className="text-muted-foreground">Data sources:</span>
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<a
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href="https://frankfurter.dev/"
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target="_blank"
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rel="noreferrer"
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className="text-foreground transition-colors hover:text-cyan-100"
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>
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{data.sources.fiat}
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</a>
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<span className="text-muted-foreground">•</span>
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<a
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href="https://www.coingecko.com/"
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target="_blank"
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rel="noreferrer"
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className="text-foreground transition-colors hover:text-cyan-100"
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>
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{data.sources.crypto}
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</a>
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</span>
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</Badge>
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</div>
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<CardDescription className="pr-1 text-base/7 sm:text-sm">
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Convert fiat currencies and cryptocurrencies using live exchange
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rates.
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</CardDescription>
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</CardHeader>
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<CardContent className="relative z-10 space-y-5 pt-4 sm:pt-5">
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{error ? (
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<div className="flex items-center gap-2 rounded-lg border border-amber-500/30 bg-amber-500/10 px-3 py-2 text-xs text-amber-200">
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<AlertTriangle className="h-4 w-4" />
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<span>
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Using last successful data. Latest refresh failed: {error}
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</span>
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</div>
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) : null}
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<div className="space-y-2">
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<label
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htmlFor="amount"
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className="text-xs uppercase tracking-[0.14em] text-muted-foreground"
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>
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Amount
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</label>
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<div className="relative">
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{amountPrefix ? (
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<span className="pointer-events-none absolute left-4 top-1/2 -translate-y-1/2 text-sm text-muted-foreground/80">
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{amountPrefix}
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</span>
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) : null}
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<Input
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id="amount"
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type="text"
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inputMode="decimal"
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value={amountInput}
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onChange={(event) => setAmountInput(event.target.value)}
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placeholder="Enter amount"
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className={cn(
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"h-14 rounded-xl bg-background/70 px-4 text-lg",
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amountPrefix ? "pl-10" : "",
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)}
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aria-invalid={Boolean(amountError)}
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aria-describedby={amountError ? "amount-error" : undefined}
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/>
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</div>
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<div className="flex flex-wrap items-center gap-2 pt-1">
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{QUICK_AMOUNTS.map((quickAmount) => {
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const isActive =
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inputValidation.ok && inputValidation.value === quickAmount;
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return (
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<Button
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key={quickAmount}
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type="button"
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variant="outline"
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size="sm"
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onClick={() => setAmountInput(String(quickAmount))}
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className={cn(
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"h-7 rounded-full border-border/70 px-3 text-xs text-muted-foreground transition-colors hover:text-foreground",
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isActive ? "border-cyan-300/50 bg-cyan-500/15 text-cyan-100" : ""
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)}
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aria-label={`Set amount to ${quickAmount}`}
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>
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{quickAmount}
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</Button>
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);
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})}
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</div>
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{amountError ? (
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<p id="amount-error" className="text-sm text-red-300">
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{amountError}
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</p>
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) : null}
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</div>
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<div className="grid gap-3 sm:grid-cols-[1fr_auto_1fr] sm:items-end">
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<CurrencySelect
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label="From"
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value={fromCode}
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onChange={setFromCode}
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assets={assets}
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/>
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<Button
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type="button"
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size="icon"
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variant="outline"
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className="mx-auto mb-0.5 rounded-full border-border/70 bg-background/50"
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onClick={handleSwap}
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aria-label="Swap currencies"
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>
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<ArrowUpDown className="h-4 w-4" />
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</Button>
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<CurrencySelect
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label="To"
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value={toCode}
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onChange={setToCode}
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assets={assets}
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/>
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</div>
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<div className="rounded-xl border border-border/70 bg-background/50 p-4">
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<div className="flex items-center justify-between gap-2">
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<p className="text-xs uppercase tracking-[0.12em] text-muted-foreground">
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Converted value
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</p>
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<Button
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type="button"
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variant="ghost"
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size="icon"
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onClick={() => void handleCopyConvertedValue()}
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disabled={convertedValue === null || !toAsset}
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className="h-7 w-7 text-muted-foreground hover:text-foreground"
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aria-label={
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isCopied
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? "Converted value copied"
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: "Copy converted value to clipboard"
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}
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>
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{isCopied ? (
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<Check className="h-3.5 w-3.5 text-cyan-200" />
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) : (
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<Copy className="h-3.5 w-3.5" />
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)}
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</Button>
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</div>
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{fromAsset && toAsset ? (
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<div className="mt-2 flex items-center gap-2 text-xs text-muted-foreground">
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<span className="inline-flex items-center gap-1.5 rounded-full border border-border/70 bg-background/60 px-2 py-1">
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<CurrencyIcon
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code={fromAsset.code}
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type={fromAsset.type}
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size="sm"
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/>
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{fromAsset.code}
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</span>
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<span>to</span>
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<span className="inline-flex items-center gap-1.5 rounded-full border border-border/70 bg-background/60 px-2 py-1">
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<CurrencyIcon
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code={toAsset.code}
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type={toAsset.type}
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size="sm"
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/>
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{toAsset.code}
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</span>
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</div>
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) : null}
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<p className="mt-2 break-all text-3xl font-semibold tracking-tight text-foreground sm:text-4xl">
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{convertedDisplay}
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</p>
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{fromAsset ? (
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<p className="mt-2 text-sm text-muted-foreground">
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for{" "}
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{inputValidation.ok
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? formatAmount(inputValidation.value, fromAsset)
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: "-"}{" "}
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{fromAsset.code}
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</p>
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) : null}
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</div>
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<Separator className="bg-border/70" />
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<div className="grid gap-3 text-sm text-muted-foreground sm:grid-cols-3">
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<div>
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<p className="text-xs uppercase tracking-[0.12em]">Current rate</p>
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<p className="mt-1 text-sm text-foreground">
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{fromAsset && toAsset && currentRate
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? `1 ${fromAsset.code} = ${currentRate} ${toAsset.code}`
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: "-"}
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</p>
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</div>
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<div>
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<p className="text-xs uppercase tracking-[0.12em]">Inverse rate</p>
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<p className="mt-1 text-sm text-foreground">
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{fromAsset && toAsset && inverseRate
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? `1 ${toAsset.code} = ${inverseRate} ${fromAsset.code}`
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: "-"}
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</p>
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</div>
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<div>
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<p className="text-xs uppercase tracking-[0.12em]">Last updated</p>
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<p className="mt-1 text-sm text-foreground">
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{formatTimestamp(data.updatedAt)}
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</p>
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</div>
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</div>
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{marketAsset ? (
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<div className="rounded-xl border border-border/70 bg-background/40 p-4">
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<div className="flex items-center justify-between gap-2">
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<p className="inline-flex items-center gap-1.5 text-xs uppercase tracking-[0.12em] text-muted-foreground">
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<BarChart3 className="h-3.5 w-3.5" />
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Market data
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</p>
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<span className="inline-flex items-center gap-1.5 rounded-full border border-border/70 bg-background/70 px-2 py-1 text-xs text-foreground">
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<CurrencyIcon
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code={marketAsset.code}
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type={marketAsset.type}
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size="sm"
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/>
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{marketAsset.code}
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</span>
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</div>
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{marketError && !marketData ? (
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<p className="mt-3 text-xs text-red-300/90">
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Unable to load market data right now.
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</p>
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) : null}
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<div className="mt-3 grid gap-2 sm:grid-cols-2 lg:grid-cols-4">
|
|
<div className="rounded-lg border border-border/60 bg-background/60 p-3">
|
|
<p className="text-xs uppercase tracking-[0.1em] text-muted-foreground">
|
|
Price
|
|
</p>
|
|
<p className="mt-1 text-base font-medium text-foreground">
|
|
{marketData ? formatUsdPrice(marketData.priceUsd) : "-"}
|
|
</p>
|
|
</div>
|
|
<div className="rounded-lg border border-border/60 bg-background/60 p-3">
|
|
<p className="text-xs uppercase tracking-[0.1em] text-muted-foreground">
|
|
24h
|
|
</p>
|
|
<p
|
|
className={cn(
|
|
"mt-1 text-base font-medium text-foreground",
|
|
marketData && marketData.change24hPct !== null
|
|
? marketData.change24hPct > 0
|
|
? "text-emerald-300"
|
|
: marketData.change24hPct < 0
|
|
? "text-red-300"
|
|
: "text-foreground"
|
|
: "text-foreground",
|
|
)}
|
|
>
|
|
{marketData
|
|
? formatSignedPercent(marketData.change24hPct)
|
|
: "-"}
|
|
</p>
|
|
</div>
|
|
<div className="rounded-lg border border-border/60 bg-background/60 p-3">
|
|
<p className="text-xs uppercase tracking-[0.1em] text-muted-foreground">
|
|
Market cap
|
|
</p>
|
|
<p className="mt-1 text-base font-medium text-foreground">
|
|
{marketData ? formatUsdCompact(marketData.marketCapUsd) : "-"}
|
|
</p>
|
|
</div>
|
|
<div className="rounded-lg border border-border/60 bg-background/60 p-3">
|
|
<p className="text-xs uppercase tracking-[0.1em] text-muted-foreground">
|
|
Volume (24h)
|
|
</p>
|
|
<p className="mt-1 text-base font-medium text-foreground">
|
|
{marketData ? formatUsdCompact(marketData.volume24hUsd) : "-"}
|
|
</p>
|
|
</div>
|
|
</div>
|
|
|
|
<div className="mt-3 flex min-h-4 items-center justify-between gap-2 text-xs text-muted-foreground">
|
|
<span>
|
|
{marketData
|
|
? `Updated ${formatTimestamp(marketData.updatedAt)}`
|
|
: isMarketLoading
|
|
? "Updating market data..."
|
|
: ""}
|
|
</span>
|
|
{marketData ? <span>Source: {marketData.source}</span> : null}
|
|
</div>
|
|
</div>
|
|
) : null}
|
|
|
|
<div className="flex items-center justify-end">
|
|
<Button
|
|
type="button"
|
|
variant="ghost"
|
|
size="sm"
|
|
onClick={() => {
|
|
void refresh();
|
|
void refreshMarket();
|
|
}}
|
|
className="text-muted-foreground"
|
|
>
|
|
<RefreshCcw className="mr-2 h-4 w-4" />
|
|
Refresh rates
|
|
</Button>
|
|
</div>
|
|
|
|
{isLoading ? (
|
|
<div className="flex items-center justify-end gap-2 text-xs text-muted-foreground">
|
|
<Loader2 className="h-3.5 w-3.5 animate-spin" />
|
|
Updating market rates...
|
|
</div>
|
|
) : null}
|
|
</CardContent>
|
|
</Card>
|
|
);
|
|
}
|