add simple downloads chart to the package overview page

components/Package/CollapsibleSection.tsx

@@ -6,6 +6,7 @@ import useSWR from 'swr';
 import { H6 } from '~/common/styleguide';
 import { Button } from '~/components/Button';
 import { Arrow } from '~/components/Icons';
+import { TimeRange } from '~/util/datetime';
 import tw from '~/util/tailwind';
 
 import DependencyRow from './DependencyRow';
@@ -30,7 +31,7 @@ export default function CollapsibleSection({ title, data, checkExistence }: Prop
       : null,
     (url: string) => fetch(url).then(res => res.json()),
     {
-      dedupingInterval: 60_000 * 10,
+      dedupingInterval: TimeRange.HOUR * 1000,
       revalidateOnFocus: false,
     }
   );

components/Package/DownloadsChart.tsx

@@ -0,0 +1,135 @@
+import { LinearGradient } from '@visx/gradient';
+import { ParentSize } from '@visx/responsive';
+import { AreaSeries, type AxisScale, Tooltip, XYChart } from '@visx/xychart';
+import { useMemo } from 'react';
+import { Text, View } from 'react-native';
+import useSWR from 'swr';
+
+import { Label } from '~/common/styleguide';
+import ThreeDotsLoader from '~/components/Package/ThreeDotsLoader';
+import { TimeRange } from '~/util/datetime';
+import tw from '~/util/tailwind';
+
+type DataMap = Record<string, number>;
+type Point = { date: Date; value: number };
+
+type Props = {
+  packageName: string;
+  height?: number;
+};
+
+const COLOR = '#2e9ab8';
+const DATE_FORMAT = {
+  month: 'short' as const,
+  day: '2-digit' as const,
+  year: '2-digit' as const,
+};
+
+export default function DownloadsChart({ packageName, height = 48 }: Props) {
+  const { data } = useSWR(
+    `/api/proxy/npm-stat?name=${packageName}`,
+    (url: string) => fetch(url).then(res => res.json()),
+    {
+      dedupingInterval: TimeRange.HOUR * 1000,
+      revalidateOnFocus: false,
+    }
+  );
+
+  const series = useMemo(
+    () => (data && Object.keys(data).length ? mapData(data[packageName]) : null),
+    [data, packageName]
+  );
+
+  const yDomain = useMemo(() => {
+    if (!series?.length) {
+      return undefined;
+    }
+
+    const max = series.reduce((acc, p) => Math.max(acc, p.value), 0);
+    const startPadding = Math.max(1, max * 0.15);
+
+    return [0, max + startPadding];
+  }, [series]);
+
+  return (
+    <ParentSize>
+      {({ width }) => {
+        if (data && !Object.keys(data).length) {
+          return (
+            <View style={tw`h-full justify-center items-center`}>
+              <Label style={tw`text-secondary font-light`}>Cannot fetch download data</Label>
+            </View>
+          );
+        }
+
+        if (!width || !data || !series) {
+          return (
+            <View style={tw`h-full justify-center items-center`}>
+              <ThreeDotsLoader />
+            </View>
+          );
+        }
+
+        return (
+          <XYChart
+            width={width}
+            height={height + 4}
+            xScale={{ type: 'time' }}
+            yScale={{ type: 'linear', nice: true, domain: yDomain }}
+            margin={{ top: 0, right: 0, bottom: 0, left: 0 }}>
+            <LinearGradient
+              id="area-gradient"
+              from={COLOR}
+              to={COLOR}
+              fromOpacity={tw.prefixMatch('dark') ? 0.3 : 0.5}
+              toOpacity={0}
+            />
+            <AreaSeries<AxisScale, AxisScale, Point>
+              dataKey="area"
+              data={series}
+              xAccessor={(p: Point) => p.date.getTime()}
+              yAccessor={(p: Point) => p.value}
+              fill="url(#area-gradient)"
+            />
+            <Tooltip<Point>
+              showVerticalCrosshair
+              verticalCrosshairStyle={{
+                stroke: COLOR,
+                strokeWidth: 0.5,
+                strokeDasharray: '4 1',
+              }}
+              offsetLeft={8}
+              offsetTop={10}
+              detectBounds
+              unstyled
+              applyPositionStyle
+              renderTooltip={({ tooltipData }) => {
+                const data = tooltipData?.nearestDatum?.datum;
+                if (!data) {
+                  return null;
+                }
+                return (
+                  <Text
+                    style={tw`flex flex-col text-xs bg-black text-white font-sans font-light px-2.5 py-1.5 rounded dark:border dark:border-default`}>
+                    <span style={tw`text-palette-gray3 dark:text-secondary`}>
+                      {data.date.toLocaleDateString('en-US', DATE_FORMAT)}
+                      &apos;
+                    </span>
+                    <span>{data.value.toLocaleString()}</span>
+                  </Text>
+                );
+              }}
+            />
+          </XYChart>
+        );
+      }}
+    </ParentSize>
+  );
+}
+
+function mapData(dataMap: DataMap): Point[] {
+  return Object.entries(dataMap).map(([date, value]) => ({
+    date: new Date(date + 'T00:00:00Z'),
+    value,
+  }));
+}

components/Package/MorePackagesBox.tsx

@@ -8,6 +8,7 @@ import useSWR from 'swr';
 import { A, Caption, H6, Label, useLayout } from '~/common/styleguide';
 import { Download, Star } from '~/components/Icons';
 import { type APIResponseType, type LibraryType } from '~/types';
+import { TimeRange } from '~/util/datetime';
 import getApiUrl from '~/util/getApiUrl';
 import tw from '~/util/tailwind';
 import urlWithQuery from '~/util/urlWithQuery';
@@ -38,7 +39,7 @@ export default function MorePackagesBox({ library }: Props) {
         return { libraries: [], total: 0 };
       }),
     {
-      dedupingInterval: 60_000 * 10,
+      dedupingInterval: TimeRange.HOUR * 1000,
       revalidateOnFocus: false,
     }
   );

components/Package/ReadmeBox.tsx

@@ -12,6 +12,7 @@ import { A, P } from '~/common/styleguide';
 import { ReadmeFile } from '~/components/Icons';
 import rndDark from '~/styles/shiki/rnd-dark.json';
 import rndLight from '~/styles/shiki/rnd-light.json';
+import { TimeRange } from '~/util/datetime';
 import { extractAndStripBlockquoteType } from '~/util/extractAndStripBlockquoteType';
 import { getReadmeAssetURL } from '~/util/getReadmeAssetUrl';
 import tw from '~/util/tailwind';
@@ -43,7 +44,7 @@ export default function ReadmeBox({ packageName, githubUrl, isTemplate, loader =
         return null;
       }),
     {
-      dedupingInterval: 60_000 * 10,
+      dedupingInterval: TimeRange.MINUTE * 10 * 1000,
       revalidateOnFocus: false,
     }
   );

package.json

@@ -27,6 +27,9 @@
     "@react-native-async-storage/async-storage": "^2.2.0",
     "@react-native-picker/picker": "^2.11.4",
     "@sentry/react": "^10.34.0",
+    "@visx/gradient": "^3.12.0",
+    "@visx/responsive": "^3.12.0",
+    "@visx/xychart": "^3.12.0",
     "crypto-js": "^4.2.0",
     "es-toolkit": "^1.44.0",
     "expo": "54.0.31",

pages/api/proxy/npm-stat.ts

@@ -0,0 +1,37 @@
+import { type NextApiRequest, type NextApiResponse } from 'next';
+
+import { NEXT_10M_CACHE_HEADER } from '~/util/Constants';
+import { TimeRange } from '~/util/datetime';
+import { parseQueryParams } from '~/util/parseQueryParams';
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  const { name } = parseQueryParams(req.query);
+  const packageName = name ? name.toString().toLowerCase().trim() : undefined;
+
+  res.setHeader('Content-Type', 'application/json');
+  res.setHeader('Cache-Control', 'public, s-maxage=600, stale-while-revalidate=300');
+
+  if (!packageName) {
+    res.statusCode = 500;
+    return res.json({
+      error: `Invalid request. You need to specify package name via 'name' query param.`,
+    });
+  }
+
+  const now = Date.now();
+  const until = new Date(now).toISOString().slice(0, 10);
+  const from = new Date(now - TimeRange.MONTH * 1000).toISOString().slice(0, 10);
+
+  const result = await fetch(
+    `https://npm-stat.com/api/download-counts?package=${packageName}&from=${from}&until=${until}`,
+    NEXT_10M_CACHE_HEADER
+  );
+
+  if ('status' in result && result.status !== 200) {
+    res.statusCode = result.status;
+    return res.json({});
+  }
+
+  res.statusCode = 200;
+  return res.json(await result.json());
+}

scenes/PackageOverviewScene.tsx

@@ -10,6 +10,7 @@ import TrendingMark from '~/components/Library/TrendingMark';
 import UpdatedAtView from '~/components/Library/UpdateAtView';
 import CollapsibleSection from '~/components/Package/CollapsibleSection';
 import DetailsNavigation from '~/components/Package/DetailsNavigation';
+import DownloadsChart from '~/components/Package/DownloadsChart';
 import EntityCounter from '~/components/Package/EntityCounter';
 import ExampleBox from '~/components/Package/ExampleBox';
 import MorePackagesBox from '~/components/Package/MorePackagesBox';
@@ -117,6 +118,10 @@ export default function PackageOverviewScene({
               <>
                 <H6 style={tw`text-[16px] mt-3 text-secondary`}>Popularity</H6>
                 <TrendingMark library={library} />
+                <H6 style={tw`text-[16px] text-secondary`}>Downloads (last month)</H6>
+                <View style={tw`h-[54px] gap-1.5 rounded-lg border border-default overflow-hidden`}>
+                  <DownloadsChart packageName={packageName} />
+                </View>
               </>
             )}
             {library.github.topics && library.github.topics.length > 0 && (