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zvspany
362
components/converter/converter-card.tsx
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362
components/converter/converter-card.tsx
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"use client";
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import { useEffect, useMemo, useState } from "react";
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import { AlertTriangle, ArrowUpDown, Loader2, RefreshCcw } 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 { useDebouncedValue } from "@/hooks/use-debounced-value";
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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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formatTimestamp
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} from "@/lib/format";
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import { buildRateMap, convertAmount } from "@/lib/rates";
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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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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">Unable to load market rates</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 variant="outline" onClick={onRetry} className="w-fit border-red-300/30">
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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 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 ?? 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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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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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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Smart Converter
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</CardTitle>
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<div className="flex items-center gap-2">
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<Badge variant="outline" className="border-border/70 bg-background/50">
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Fiat: {data.sources.fiat}
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</Badge>
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<Badge variant="outline" className="border-border/70 bg-background/50">
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Crypto: {data.sources.crypto}
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</Badge>
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</div>
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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 and crypto assets instantly using live normalized USD quote data.
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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>Using last successful data. Latest refresh failed: {error}</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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<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="h-14 rounded-xl bg-background/70 px-4 text-lg"
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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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{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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<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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{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 code={fromAsset.code} type={fromAsset.type} size="sm" />
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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 code={toAsset.code} type={toAsset.type} size="sm" />
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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 {inputValidation.ok ? formatAmount(inputValidation.value, fromAsset) : "-"}{" "}
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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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<div className="flex items-center justify-end">
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<Button
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type="button"
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variant="ghost"
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size="sm"
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onClick={() => void refresh()}
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className="text-muted-foreground"
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>
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<RefreshCcw className="mr-2 h-4 w-4" />
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Refresh rates
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</Button>
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</div>
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{isLoading ? (
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<div className="flex items-center justify-end gap-2 text-xs text-muted-foreground">
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<Loader2 className="h-3.5 w-3.5 animate-spin" />
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Updating market rates...
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</div>
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) : null}
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</CardContent>
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</Card>
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);
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}
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