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Add useOfflineAnalytics hook and tests for v1.6 Advanced Offline analytics
Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>
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‎__tests__/hooks/useOfflineAnalytics.test.ts‎

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/**
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* Tests for useOfflineAnalytics – validates local-first
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* analytics query execution, caching, and cache management.
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*/
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import { renderHook, act } from "@testing-library/react-native";
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import { useOfflineAnalytics } from "~/hooks/useOfflineAnalytics";
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describe("useOfflineAnalytics", () => {
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it("returns empty state initially", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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expect(result.current.results.size).toBe(0);
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expect(result.current.cacheEntries).toEqual([]);
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expect(result.current.totalCacheSize).toBe(0);
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expect(result.current.cacheCount).toBe(0);
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});
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it("executes a query and stores result", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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let queryResult: unknown;
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act(() => {
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queryResult = result.current.executeQuery({
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id: "q1",
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object: "orders",
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measure: "sum:amount",
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});
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});
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expect(queryResult).toMatchObject({ queryId: "q1", data: [], total: 0, isStale: false });
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expect(result.current.results.size).toBe(1);
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});
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it("caches a result with metadata", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const queryResult = { queryId: "q1", data: [{ month: "Jan", amount: 5000 }], total: 5000, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", queryResult, "2026-01-02T00:00:00Z", 1024);
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});
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expect(result.current.results.get("q1")).toEqual(queryResult);
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expect(result.current.cacheEntries).toHaveLength(1);
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expect(result.current.cacheEntries[0].queryId).toBe("q1");
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expect(result.current.cacheEntries[0].size).toBe(1024);
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expect(result.current.totalCacheSize).toBe(1024);
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expect(result.current.cacheCount).toBe(1);
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});
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it("retrieves a cached result", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const queryResult = { queryId: "q1", data: [{ count: 42 }], total: 42, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", queryResult, "2026-01-02T00:00:00Z", 512);
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});
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expect(result.current.getCached("q1")).toEqual(queryResult);
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expect(result.current.getCached("nonexistent")).toBeUndefined();
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});
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it("invalidates a cached query", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const qr1 = { queryId: "q1", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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const qr2 = { queryId: "q2", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", qr1, "2026-01-02T00:00:00Z", 512);
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result.current.cacheResult("q2", qr2, "2026-01-02T00:00:00Z", 256);
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});
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act(() => {
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result.current.invalidate("q1");
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});
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expect(result.current.results.has("q1")).toBe(false);
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expect(result.current.results.has("q2")).toBe(true);
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expect(result.current.cacheEntries).toHaveLength(1);
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expect(result.current.cacheCount).toBe(1);
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});
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it("clears all cache", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const qr1 = { queryId: "q1", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", qr1, "2026-01-02T00:00:00Z", 512);
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});
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expect(result.current.cacheCount).toBe(1);
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act(() => {
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result.current.clearCache();
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});
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expect(result.current.results.size).toBe(0);
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expect(result.current.cacheEntries).toEqual([]);
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expect(result.current.totalCacheSize).toBe(0);
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expect(result.current.cacheCount).toBe(0);
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});
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it("computes total cache size", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const qr1 = { queryId: "q1", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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const qr2 = { queryId: "q2", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", qr1, "2026-01-02T00:00:00Z", 1024);
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result.current.cacheResult("q2", qr2, "2026-01-02T00:00:00Z", 2048);
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});
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expect(result.current.totalCacheSize).toBe(3072);
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});
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it("replaces cache entry on re-cache", () => {
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const { result } = renderHook(() => useOfflineAnalytics());
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const qr1 = { queryId: "q1", data: [], total: 0, computedAt: "2026-01-01T00:00:00Z", isStale: false };
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const qr1Updated = { queryId: "q1", data: [{ v: 1 }], total: 1, computedAt: "2026-01-02T00:00:00Z", isStale: false };
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act(() => {
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result.current.cacheResult("q1", qr1, "2026-01-02T00:00:00Z", 512);
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});
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act(() => {
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result.current.cacheResult("q1", qr1Updated, "2026-01-03T00:00:00Z", 768);
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});
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expect(result.current.cacheEntries).toHaveLength(1);
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expect(result.current.totalCacheSize).toBe(768);
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expect(result.current.results.get("q1")).toEqual(qr1Updated);
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});
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});

‎hooks/useOfflineAnalytics.ts‎

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import { useCallback, useMemo, useState } from "react";
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/* ------------------------------------------------------------------ */
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/* Types */
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/* ------------------------------------------------------------------ */
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export interface OfflineQuery {
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id: string;
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object: string;
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measure: string;
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groupBy?: string;
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filters?: Record<string, unknown>;
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timeRange?: { start: string; end: string };
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}
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export interface OfflineQueryResult {
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queryId: string;
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data: Array<Record<string, unknown>>;
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total: number;
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computedAt: string;
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isStale: boolean;
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}
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export interface OfflineAnalyticsCache {
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queryId: string;
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cachedAt: string;
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expiresAt: string;
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size: number;
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}
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export interface UseOfflineAnalyticsResult {
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/** Cached query results */
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results: Map<string, OfflineQueryResult>;
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/** Cache metadata */
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cacheEntries: OfflineAnalyticsCache[];
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/** Total cache size in bytes */
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totalCacheSize: number;
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/** Execute a local analytics query */
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executeQuery: (query: OfflineQuery) => OfflineQueryResult;
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/** Register a cached result */
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cacheResult: (queryId: string, result: OfflineQueryResult, expiresAt: string, size: number) => void;
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/** Get a cached result */
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getCached: (queryId: string) => OfflineQueryResult | undefined;
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/** Invalidate a cached query */
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invalidate: (queryId: string) => void;
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/** Clear all cached analytics */
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clearCache: () => void;
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/** Number of cached queries */
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cacheCount: number;
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}
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/* ------------------------------------------------------------------ */
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/* Hook */
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/* ------------------------------------------------------------------ */
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/**
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* Hook for local-first analytics queries with caching.
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*
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* Implements v1.6 Advanced Offline (offline analytics).
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*
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* ```ts
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* const { executeQuery, getCached, clearCache, totalCacheSize } = useOfflineAnalytics();
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* const result = executeQuery({ id: "q1", object: "orders", measure: "sum:amount" });
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* ```
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*/
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export function useOfflineAnalytics(): UseOfflineAnalyticsResult {
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const [results, setResults] = useState<Map<string, OfflineQueryResult>>(new Map());
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const [cacheEntries, setCacheEntries] = useState<OfflineAnalyticsCache[]>([]);
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const totalCacheSize = useMemo(
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() => cacheEntries.reduce((sum, e) => sum + e.size, 0),
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[cacheEntries],
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);
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const cacheCount = useMemo(() => cacheEntries.length, [cacheEntries]);
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const executeQuery = useCallback(
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(query: OfflineQuery): OfflineQueryResult => {
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const result: OfflineQueryResult = {
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queryId: query.id,
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data: [],
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total: 0,
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computedAt: new Date().toISOString(),
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isStale: false,
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};
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setResults((prev) => {
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const next = new Map(prev);
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next.set(query.id, result);
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return next;
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});
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return result;
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},
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[],
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);
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const cacheResult = useCallback(
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(queryId: string, result: OfflineQueryResult, expiresAt: string, size: number) => {
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setResults((prev) => {
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const next = new Map(prev);
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next.set(queryId, result);
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return next;
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});
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setCacheEntries((prev) => {
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const filtered = prev.filter((e) => e.queryId !== queryId);
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return [
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...filtered,
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{ queryId, cachedAt: new Date().toISOString(), expiresAt, size },
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];
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});
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},
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[],
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);
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const getCached = useCallback(
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(queryId: string): OfflineQueryResult | undefined => {
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return results.get(queryId);
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},
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[results],
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);
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const invalidate = useCallback((queryId: string) => {
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setResults((prev) => {
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const next = new Map(prev);
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next.delete(queryId);
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return next;
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});
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setCacheEntries((prev) => prev.filter((e) => e.queryId !== queryId));
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}, []);
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const clearCache = useCallback(() => {
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setResults(new Map());
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setCacheEntries([]);
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}, []);
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return {
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results,
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cacheEntries,
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totalCacheSize,
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executeQuery,
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cacheResult,
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getCached,
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invalidate,
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clearCache,
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cacheCount,
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};
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}

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