feat(market): add selectable chart ranges (24h/7d/30d/1y/all) with range-aware API caching and downsampling

README.md

@@ -161,9 +161,10 @@ If empty, the app uses the local default (`/api/rates`).
 - `GET /api/convert?from=USD&to=BTC&amount=100`
   - Converts between any supported fiat/crypto pair using current normalized rates.
   - Example response fields: `amount`, `convertedAmount`, `rate`, `inverseRate`, `updatedAt`, `sources`.
-- `GET /api/market?code=BTC`
+- `GET /api/market?code=BTC&range=24h`
   - Returns CoinGecko-based market snapshot for a crypto asset.
-  - Example response fields: `priceUsd`, `change24hPct`, `marketCapUsd`, `volume24hUsd`, `priceHistory24h`, `updatedAt`.
+  - Supported ranges: `24h`, `7d`, `30d`, `1y`, `all`.
+  - Example response fields: `priceUsd`, `change24hPct`, `marketCapUsd`, `volume24hUsd`, `priceHistoryRange`, `priceHistory`, `updatedAt`.
 
 ## Architecture Notes
 

app/api/market/route.ts

@@ -1,6 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import { z } from "zod";
 
+import { MARKET_CHART_RANGES } from "@/lib/market";
 import { getRatesWithCache } from "@/lib/server/rates-cache";
 import {
   getCryptoMarketWithCache,
@@ -10,6 +11,7 @@ import {
 
 const querySchema = z.object({
   code: z.string().trim().toUpperCase().min(1),
+  range: z.enum(MARKET_CHART_RANGES).default("24h"),
 });
 
 export const revalidate = 60;
@@ -18,6 +20,7 @@ export async function GET(request: NextRequest) {
   const searchParams = request.nextUrl.searchParams;
   const queryResult = querySchema.safeParse({
     code: searchParams.get("code") ?? "",
+    range: searchParams.get("range") ?? undefined,
   });
 
   if (!queryResult.success) {
@@ -32,7 +35,7 @@ export async function GET(request: NextRequest) {
     );
   }
 
-  const { code } = queryResult.data;
+  const { code, range } = queryResult.data;
 
   try {
     const rates = await getRatesWithCache();
@@ -56,6 +59,7 @@ export async function GET(request: NextRequest) {
       code: asset.code,
       name: asset.name,
       providerId: asset.providerId,
+      range,
     });
 
     return NextResponse.json(market, {
@@ -65,7 +69,7 @@ export async function GET(request: NextRequest) {
       },
     });
   } catch (error) {
-    const fallback = getLastCachedCryptoMarket(code);
+    const fallback = getLastCachedCryptoMarket(code, range);
 
     if (fallback) {
       return NextResponse.json(fallback, {

components/converter/converter-card.tsx

@@ -29,6 +29,10 @@ import { Skeleton } from "@/components/ui/skeleton";
 import { useCryptoMarket } from "@/hooks/use-crypto-market";
 import { useDebouncedValue } from "@/hooks/use-debounced-value";
 import { getDisplaySymbol } from "@/lib/currency-display";
+import {
+  MARKET_CHART_RANGES,
+  type MarketChartRange,
+} from "@/lib/market";
 import { useMarketRates } from "@/hooks/use-market-rates";
 import {
   formatAmount,
@@ -48,6 +52,13 @@ const DEFAULT_TO = "EUR";
 const QUICK_AMOUNTS = [10, 50, 100, 500, 1000] as const;
 const DEFAULT_MULTI_CONVERSION_CODES = ["USD", "EUR", "BTC", "ETH", "SOL"] as const;
 const MAX_MULTI_CONVERSIONS = 4;
+const MARKET_RANGE_LABELS: Record<MarketChartRange, string> = {
+  "24h": "24h",
+  "7d": "7d",
+  "30d": "30d",
+  "1y": "1y",
+  all: "all",
+};
 
 interface ConverterCardProps {
   forcedFromCode?: string;
@@ -135,6 +146,7 @@ export function ConverterCard({
   const [fromCode, setFromCode] = useState(DEFAULT_FROM);
   const [toCode, setToCode] = useState(DEFAULT_TO);
   const [isCopied, setIsCopied] = useState(false);
+  const [marketRange, setMarketRange] = useState<MarketChartRange>("24h");
 
   const debouncedAmount = useDebouncedValue(amountInput, 120);
 
@@ -259,7 +271,7 @@ export function ConverterCard({
     error: marketError,
     isLoading: isMarketLoading,
     refresh: refreshMarket,
-  } = useCryptoMarket(marketAsset?.code ?? null);
+  } = useCryptoMarket(marketAsset?.code ?? null, marketRange);
 
   const handleCopyConvertedValue = async () => {
     if (convertedValue === null || !toAsset) {
@@ -295,6 +307,35 @@ export function ConverterCard({
     return Number.isFinite(latest) ? new Date(latest).toISOString() : data.updatedAt;
   }, [data, marketData?.updatedAt]);
 
+  const marketRangeChangePct = useMemo(() => {
+    if (!marketData) {
+      return null;
+    }
+
+    const points = marketData.priceHistory;
+
+    if (points.length >= 2) {
+      const first = points[0]?.priceUsd;
+      const last = points[points.length - 1]?.priceUsd;
+
+      if (
+        typeof first === "number" &&
+        typeof last === "number" &&
+        Number.isFinite(first) &&
+        Number.isFinite(last) &&
+        first > 0
+      ) {
+        return ((last - first) / first) * 100;
+      }
+    }
+
+    if (marketRange === "24h") {
+      return marketData.change24hPct;
+    }
+
+    return null;
+  }, [marketData, marketRange]);
+
   const amountPrefix = getDisplaySymbol(fromAsset);
   const amountInputPaddingLeft = useMemo(() => {
     if (!amountPrefix) {
@@ -627,6 +668,30 @@ export function ConverterCard({
               </span>
             </div>
 
+            <div className="mt-3 flex flex-wrap gap-1.5">
+              {MARKET_CHART_RANGES.map((range) => {
+                const isActive = marketRange === range;
+
+                return (
+                  <Button
+                    key={range}
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => setMarketRange(range)}
+                    className={cn(
+                      "h-7 rounded-full border-border/70 px-3 text-xs text-muted-foreground hover:text-foreground",
+                      isActive ? "border-cyan-300/50 bg-cyan-500/15 text-cyan-100" : "",
+                    )}
+                    aria-pressed={isActive}
+                    aria-label={`Show ${MARKET_RANGE_LABELS[range]} chart`}
+                  >
+                    {MARKET_RANGE_LABELS[range]}
+                  </Button>
+                );
+              })}
+            </div>
+
             {marketError && !marketData ? (
               <p className="mt-3 text-xs text-red-300/90">
                 Unable to load market data right now.
@@ -634,7 +699,8 @@ export function ConverterCard({
             ) : null}
 
             <PriceSparkline
-              points={marketData?.priceHistory24h ?? []}
+              points={marketData?.priceHistory ?? []}
+              rangeLabel={MARKET_RANGE_LABELS[marketRange]}
               isLoading={isMarketLoading && !marketData}
               className="mt-3"
             />
@@ -650,23 +716,21 @@ export function ConverterCard({
               </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
+                  {MARKET_RANGE_LABELS[marketRange]}
                 </p>
                 <p
                   className={cn(
                     "mt-1 text-base font-medium text-foreground",
-                    marketData && marketData.change24hPct !== null
+                    marketRangeChangePct !== null
-                      ? marketData.change24hPct > 0
+                      ? marketRangeChangePct > 0
                         ? "text-emerald-300"
-                        : marketData.change24hPct < 0
+                        : marketRangeChangePct < 0
                           ? "text-red-300"
                           : "text-foreground"
                       : "text-foreground",
                   )}
                 >
-                  {marketData
+                  {marketData ? formatSignedPercent(marketRangeChangePct) : "-"}
-                    ? formatSignedPercent(marketData.change24hPct)
-                    : "-"}
                 </p>
               </div>
               <div className="rounded-lg border border-border/60 bg-background/60 p-3">

components/converter/price-sparkline.tsx

@@ -11,12 +11,14 @@ interface PriceSparklinePoint {
 
 interface PriceSparklineProps {
   points: PriceSparklinePoint[];
+  rangeLabel: string;
   isLoading?: boolean;
   className?: string;
 }
 
 export function PriceSparkline({
   points,
+  rangeLabel,
   isLoading = false,
   className,
 }: PriceSparklineProps) {
@@ -82,7 +84,7 @@ export function PriceSparkline({
       )}
     >
       <p className="text-xs uppercase tracking-[0.1em] text-muted-foreground">
-        Price (24h)
+        Price ({rangeLabel})
       </p>
 
       {chart ? (
@@ -91,7 +93,7 @@ export function PriceSparkline({
             viewBox={`0 0 ${chart.width} ${chart.height}`}
             className="h-20 w-full"
             role="img"
-            aria-label="Price trend over the last 24 hours"
+            aria-label={`Price trend over the last ${rangeLabel}`}
             preserveAspectRatio="none"
             shapeRendering="geometricPrecision"
           >
@@ -130,7 +132,9 @@ export function PriceSparkline({
         </div>
       ) : (
         <div className="mt-2 flex h-20 items-center justify-center rounded-md border border-dashed border-border/60 text-xs text-muted-foreground">
-          {isLoading ? "Loading 24h price history..." : "24h price history unavailable"}
+          {isLoading
+            ? `Loading ${rangeLabel} price history...`
+            : `${rangeLabel} price history unavailable`}
         </div>
       )}
     </div>

hooks/use-crypto-market.ts

@@ -4,13 +4,17 @@ import { useCallback, useEffect, useMemo, useState } from "react";
 
 import { buildApiUrl } from "@/lib/api/url";
 import {
+  type MarketChartRange,
   parseCryptoMarketResponse,
   type CryptoMarketResponse,
 } from "@/lib/market";
 
 const REFRESH_INTERVAL_MS = 60_000;
 
-export function useCryptoMarket(assetCode: string | null) {
+export function useCryptoMarket(
+  assetCode: string | null,
+  range: MarketChartRange = "24h",
+) {
   const [data, setData] = useState<CryptoMarketResponse | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);
@@ -18,7 +22,7 @@ export function useCryptoMarket(assetCode: string | null) {
   useEffect(() => {
     setData(null);
     setError(null);
-  }, [assetCode]);
+  }, [assetCode, range]);
 
   const fetchMarket = useCallback(async () => {
     if (!assetCode) {
@@ -32,7 +36,9 @@ export function useCryptoMarket(assetCode: string | null) {
 
     try {
       const response = await fetch(
-        buildApiUrl(`/api/market?code=${encodeURIComponent(assetCode)}`),
+        buildApiUrl(
+          `/api/market?code=${encodeURIComponent(assetCode)}&range=${encodeURIComponent(range)}`,
+        ),
       );
 
       if (!response.ok) {
@@ -53,7 +59,7 @@ export function useCryptoMarket(assetCode: string | null) {
     } finally {
       setIsLoading(false);
     }
-  }, [assetCode]);
+  }, [assetCode, range]);
 
   useEffect(() => {
     void fetchMarket();
@@ -80,7 +86,7 @@ export function useCryptoMarket(assetCode: string | null) {
       window.clearInterval(id);
       document.removeEventListener("visibilitychange", handleVisibilityChange);
     };
-  }, [assetCode, fetchMarket]);
+  }, [assetCode, range, fetchMarket]);
 
   return useMemo(
     () => ({

lib/api/crypto.ts

@@ -1,4 +1,5 @@
 import { CRYPTO_ASSETS } from "@/lib/assets";
+import type { MarketChartRange } from "@/lib/market";
 
 export interface CryptoRateResult {
   usdPrices: Record<string, number>;
@@ -19,6 +20,13 @@ export interface CryptoPricePoint {
 }
 
 const COINGECKO_BASE_URL = "https://api.coingecko.com/api/v3";
+const COINGECKO_RANGE_TO_DAYS: Record<MarketChartRange, string> = {
+  "24h": "1",
+  "7d": "7",
+  "30d": "30",
+  "1y": "365",
+  all: "max",
+};
 
 function buildCoinGeckoHeaders(): HeadersInit {
   const headers: Record<string, string> = {
@@ -96,12 +104,14 @@ export async function fetchCryptoMarketSnapshot(
   };
 }
 
-export async function fetchCryptoPriceHistory24h(
+export async function fetchCryptoPriceHistory(
   providerId: string,
+  range: MarketChartRange,
 ): Promise<CryptoPricePoint[]> {
+  const days = COINGECKO_RANGE_TO_DAYS[range];
   const url = `${COINGECKO_BASE_URL}/coins/${encodeURIComponent(
     providerId,
-  )}/market_chart?vs_currency=usd&days=1`;
+  )}/market_chart?vs_currency=usd&days=${encodeURIComponent(days)}`;
 
   const response = await fetch(url, {
     next: { revalidate: 60 },

lib/market.ts

@@ -1,5 +1,8 @@
 import { z } from "zod";
 
+export const MARKET_CHART_RANGES = ["24h", "7d", "30d", "1y", "all"] as const;
+export type MarketChartRange = (typeof MARKET_CHART_RANGES)[number];
+
 export interface CryptoMarketResponse {
   code: string;
   name: string;
@@ -7,7 +10,8 @@ export interface CryptoMarketResponse {
   change24hPct: number | null;
   marketCapUsd: number | null;
   volume24hUsd: number | null;
-  priceHistory24h: Array<{
+  priceHistoryRange: MarketChartRange;
+  priceHistory: Array<{
     timestamp: string;
     priceUsd: number;
   }>;
@@ -15,26 +19,38 @@ export interface CryptoMarketResponse {
   source: string;
 }
 
-const marketResponseSchema = z.object({
+const pointSchema = z.object({
-  code: z.string(),
+  timestamp: z.string(),
-  name: z.string(),
   priceUsd: z.number().positive(),
-  change24hPct: z.number().nullable(),
-  marketCapUsd: z.number().nullable(),
-  volume24hUsd: z.number().nullable(),
-  priceHistory24h: z
-    .array(
-      z.object({
-        timestamp: z.string(),
-        priceUsd: z.number().positive(),
-      }),
-    )
-    .optional()
-    .default([]),
-  updatedAt: z.string(),
-  source: z.string(),
 });
 
+const marketResponseSchema = z
+  .object({
+    code: z.string(),
+    name: z.string(),
+    priceUsd: z.number().positive(),
+    change24hPct: z.number().nullable(),
+    marketCapUsd: z.number().nullable(),
+    volume24hUsd: z.number().nullable(),
+    priceHistoryRange: z.enum(MARKET_CHART_RANGES),
+    priceHistory: z.array(pointSchema).optional(),
+    priceHistory24h: z.array(pointSchema).optional(),
+    updatedAt: z.string(),
+    source: z.string(),
+  })
+  .transform((value) => ({
+    code: value.code,
+    name: value.name,
+    priceUsd: value.priceUsd,
+    change24hPct: value.change24hPct,
+    marketCapUsd: value.marketCapUsd,
+    volume24hUsd: value.volume24hUsd,
+    priceHistoryRange: value.priceHistoryRange,
+    priceHistory: value.priceHistory ?? value.priceHistory24h ?? [],
+    updatedAt: value.updatedAt,
+    source: value.source,
+  }));
+
 export function parseCryptoMarketResponse(
   payload: unknown,
 ): CryptoMarketResponse {

lib/server/market-cache.ts

@@ -1,7 +1,8 @@
 import {
   fetchCryptoMarketSnapshot,
-  fetchCryptoPriceHistory24h,
+  fetchCryptoPriceHistory,
 } from "@/lib/api/crypto";
+import type { MarketChartRange } from "@/lib/market";
 
 export interface CachedCryptoMarketSnapshot {
   code: string;
@@ -10,7 +11,8 @@ export interface CachedCryptoMarketSnapshot {
   change24hPct: number | null;
   marketCapUsd: number | null;
   volume24hUsd: number | null;
-  priceHistory24h: Array<{
+  priceHistoryRange: MarketChartRange;
+  priceHistory: Array<{
     timestamp: string;
     priceUsd: number;
   }>;
@@ -30,12 +32,33 @@ export const MARKET_CACHE_CONTROL_VALUE =
 const marketCache = new Map<string, CacheEntry>();
 const inFlightRequests = new Map<string, Promise<CachedCryptoMarketSnapshot>>();
 
+function downsamplePriceHistory(
+  points: Array<{ timestamp: string; priceUsd: number }>,
+  maxPoints: number,
+): Array<{ timestamp: string; priceUsd: number }> {
+  if (points.length <= maxPoints) {
+    return points;
+  }
+
+  const sampled: Array<{ timestamp: string; priceUsd: number }> = [];
+  const lastIndex = points.length - 1;
+  const step = lastIndex / (maxPoints - 1);
+
+  for (let index = 0; index < maxPoints; index += 1) {
+    const sourceIndex = Math.round(index * step);
+    sampled.push(points[Math.min(sourceIndex, lastIndex)]);
+  }
+
+  return sampled;
+}
+
 export async function getCryptoMarketWithCache(params: {
   code: string;
   name: string;
   providerId: string;
+  range: MarketChartRange;
 }): Promise<CachedCryptoMarketSnapshot> {
-  const cacheKey = params.code;
+  const cacheKey = `${params.code}:${params.range}`;
   const cached = marketCache.get(cacheKey);
   const now = Date.now();
 
@@ -54,7 +77,8 @@ export async function getCryptoMarketWithCache(params: {
     let history: Array<{ timestamp: string; priceUsd: number }> = [];
 
     try {
-      history = await fetchCryptoPriceHistory24h(params.providerId);
+      history = await fetchCryptoPriceHistory(params.providerId, params.range);
+      history = downsamplePriceHistory(history, 180);
     } catch {
       history = [];
     }
@@ -66,7 +90,8 @@ export async function getCryptoMarketWithCache(params: {
       change24hPct: snapshot.change24hPct,
       marketCapUsd: snapshot.marketCapUsd,
       volume24hUsd: snapshot.volume24hUsd,
-      priceHistory24h: history,
+      priceHistoryRange: params.range,
+      priceHistory: history,
       updatedAt: snapshot.updatedAt,
       source: "CoinGecko",
     };
@@ -90,6 +115,7 @@ export async function getCryptoMarketWithCache(params: {
 
 export function getLastCachedCryptoMarket(
   code: string,
+  range: MarketChartRange,
 ): CachedCryptoMarketSnapshot | null {
-  return marketCache.get(code)?.data ?? null;
+  return marketCache.get(`${code}:${range}`)?.data ?? null;
 }