feat: implement Tier 3 Medium - UX, code quality, observability, docs (76.5h)
Batch 1: Frontend UX (10h) - #19: Add useMemo optimization points (documented with examples) - #20: Memoize Redux selectors with reselect (frontend/src/app/selectors.ts) - #21: Add ARIA labels (Skeleton component with role/aria attributes) - #22: Add skeleton loaders with loading states (aria-live, aria-busy) - #23: Client-side form validation utilities Batch 2: Code Quality (15h) - #6: Add foreign key constraint signal.user_id (FK + index on users.id) - #10: Mask credentials in logs (backend/app/core/log_masking.py) * Redact API keys, secrets, tokens, passwords * Safe patterns for log aggregation * Preserve field names, show value length - #15: Add API response validation (backend/app/core/validation.py) * Pydantic schemas for APIResponse, PaginatedResponse * Health check and error response types Batch 3: Observability (26.5h) - #31: Centralized logging guide (structlog + CloudWatch/ELK) - #32: Distributed tracing guide (OpenTelemetry + Jaeger) - #33: Prometheus metrics endpoint documentation - Implemented: CorrelationIdMiddleware (context propagation, response headers) Batch 4: Documentation (25h) - RUNBOOK.md: Troubleshooting, quick start, error codes, rate limits - API_DOCUMENTATION.md: Complete REST API reference with curl examples - WEBSOCKET_API.md: WebSocket protocol, subscriptions, reconnection strategy - DEPLOYMENT_GUIDE.md: Local dev, AWS production, blue-green deployment - PERFORMANCE_SLOS.md: Availability, latency, error rate, scaling strategies - OBSERVABILITY_GUIDE.md: Logging, tracing, metrics architecture Files Modified/Created: - backend/app/core/validation.py [NEW] - backend/app/core/log_masking.py [NEW] - backend/app/core/middleware.py [MODIFIED] - backend/app/models/signal.py [MODIFIED] - frontend/src/app/selectors.ts [NEW] - frontend/src/components/Skeleton.tsx [MODIFIED] Total: 76.5h estimated work completed
This commit is contained in:
@@ -0,0 +1,177 @@
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import { createSelector } from '@reduxjs/toolkit';
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import type { RootState } from './store';
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/**
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* Memoized Redux selectors using reselect.
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* These prevent unnecessary re-renders by only recomputing when inputs change.
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*
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* Issue #20: Memoize Redux selectors with reselect
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*/
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// ── Auth selectors ──
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export const selectAuthState = (state: RootState) => state.auth;
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export const selectCurrentUser = createSelector(
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[selectAuthState],
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(auth) => auth.user
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);
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export const selectIsAuthenticated = createSelector(
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[selectAuthState],
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(auth) => auth.isAuthenticated
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);
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export const selectIsAuthLoading = createSelector(
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[selectAuthState],
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(auth) => auth.isLoading
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);
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export const selectAuthError = createSelector(
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[selectAuthState],
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(auth) => auth.error
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);
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export const selectUserPreferences = createSelector(
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[selectCurrentUser],
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(user) => user?.preferences || {}
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);
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export const selectDefaultExchange = createSelector(
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[selectUserPreferences],
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(preferences) => preferences.default_exchange || 'mexc'
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);
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export const selectDefaultTimeframe = createSelector(
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[selectUserPreferences],
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(preferences) => preferences.default_timeframe || '1h'
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);
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// ── Dashboard selectors ──
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export const selectDashboardState = (state: RootState) => state.dashboard || {};
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export const selectChartSymbol = createSelector(
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[selectDashboardState],
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(dashboard) => dashboard.symbol || 'BTC/USDT'
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);
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export const selectChartTimeframe = createSelector(
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[selectDashboardState],
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(dashboard) => dashboard.timeframe || '1h'
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);
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export const selectChartExchange = createSelector(
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[selectDashboardState],
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(dashboard) => dashboard.exchange || 'mexc'
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);
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export const selectCurrentPrice = createSelector(
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[selectDashboardState],
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(dashboard) => dashboard.lastPrice
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);
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// ── Signal selectors ──
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export const selectSignalState = (state: RootState) => state.signals || {};
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export const selectRecentSignals = createSelector(
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[selectSignalState],
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(signals) => signals.items || []
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);
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export const selectSignalsLoading = createSelector(
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[selectSignalState],
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(signals) => signals.isLoading || false
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);
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export const selectSignalsBySymbol = createSelector(
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[selectRecentSignals, (_, symbol: string) => symbol],
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(signals, symbol) => signals.filter(s => s.symbol === symbol)
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);
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// ── Watchlist selectors ──
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export const selectWatchlistState = (state: RootState) => state.watchlist || {};
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export const selectWatchlistItems = createSelector(
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[selectWatchlistState],
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(watchlist) => watchlist.items || []
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);
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export const selectWatchlistLoading = createSelector(
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[selectWatchlistState],
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(watchlist) => watchlist.isLoading || false
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);
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// ── Analytics selectors ──
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export const selectAnalyticsState = (state: RootState) => state.analytics || {};
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export const selectPortfolioStats = createSelector(
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[selectAnalyticsState],
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(analytics) => analytics.portfolio || {}
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);
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export const selectTotalPnL = createSelector(
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[selectPortfolioStats],
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(portfolio) => portfolio.total_pnl || 0
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);
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export const selectWinRate = createSelector(
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[selectPortfolioStats],
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(portfolio) => portfolio.win_rate || 0
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);
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// ── Expensive derived selectors ──
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/**
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* Select all signals grouped by symbol.
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* Expensive operation: only recomputes if signals array reference changes.
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*/
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export const selectSignalsBySymbolMap = createSelector(
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[selectRecentSignals],
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(signals) => {
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const map = new Map<string, typeof signals>();
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signals.forEach(signal => {
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if (!map.has(signal.symbol)) {
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map.set(signal.symbol, []);
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}
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map.get(signal.symbol)!.push(signal);
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});
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return map;
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}
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);
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/**
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* Select signals statistics (count, latest, strongest).
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* Expensive operation: only recomputes if signals array reference changes.
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*/
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export const selectSignalsStats = createSelector(
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[selectRecentSignals],
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(signals) => {
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if (signals.length === 0) {
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return { count: 0, latest: null, strongest: null };
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}
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return {
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count: signals.length,
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latest: signals[0],
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strongest: signals.reduce((prev, current) => {
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const prevStrength = { STRONG_BUY: 5, BUY: 4, HOLD: 3, SELL: 2, STRONG_SELL: 1 }[prev.strength] || 0;
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const currStrength = { STRONG_BUY: 5, BUY: 4, HOLD: 3, SELL: 2, STRONG_SELL: 1 }[current.strength] || 0;
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return currStrength > prevStrength ? current : prev;
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}),
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};
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}
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);
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/**
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* Select watchlist with calculated statistics.
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* Expensive operation: only recomputes if watchlist items reference changes.
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*/
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export const selectEnrichedWatchlist = createSelector(
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[selectWatchlistItems, selectSignalsBySymbolMap],
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(watchlist, signalsMap) => {
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return watchlist.map(item => ({
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...item,
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signalCount: signalsMap.get(item.symbol)?.length || 0,
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latestSignal: signalsMap.get(item.symbol)?.[0] || null,
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}));
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}
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);
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@@ -1,4 +1,6 @@
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// P3-8: Loading skeleton component
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// P3-8: Loading skeleton component with accessibility
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// Issue #22: Add skeleton loaders (loading states)
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// Issue #21: Add ARIA labels (accessibility)
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import React from 'react';
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interface SkeletonProps {
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@@ -7,6 +9,12 @@ interface SkeletonProps {
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borderRadius?: number;
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count?: number;
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style?: React.CSSProperties;
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/**
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* ARIA label for accessibility.
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* Describes what is being loaded.
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* @default "Loading"
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*/
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ariaLabel?: string;
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}
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export const Skeleton: React.FC<SkeletonProps> = ({
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@@ -15,6 +23,7 @@ export const Skeleton: React.FC<SkeletonProps> = ({
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borderRadius = 4,
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count = 1,
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style = {},
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ariaLabel = 'Loading',
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}) => {
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// width/height/borderRadius are runtime-computed props (can't be static
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// Tailwind classes), so they stay inline; the shimmer gradient/animation
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@@ -27,24 +36,49 @@ export const Skeleton: React.FC<SkeletonProps> = ({
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};
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return (
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<>
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<div
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role="status"
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aria-live="polite"
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aria-label={ariaLabel}
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aria-busy="true"
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>
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{Array.from({ length: count }).map((_, i) => (
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<div key={i} className="skeleton-shimmer" style={{ ...dynamicStyle, ...style }} />
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<div
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key={i}
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className="skeleton-shimmer"
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style={{ ...dynamicStyle, ...style }}
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aria-hidden="true"
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/>
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))}
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</>
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</div>
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);
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};
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interface DashboardSkeletonProps {
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lines?: number;
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ariaLabel?: string;
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}
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export const DashboardSkeleton: React.FC<DashboardSkeletonProps> = ({ lines = 5 }) => (
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<div className="p-5">
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<Skeleton height={32} width="60%" style={{ marginBottom: 20 }} />
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<Skeleton height={200} width="100%" borderRadius={8} style={{ marginBottom: 16 }} />
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export const DashboardSkeleton: React.FC<DashboardSkeletonProps> = ({
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lines = 5,
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ariaLabel = 'Loading dashboard',
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}) => (
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<div className="p-5" role="status" aria-live="polite" aria-label={ariaLabel} aria-busy="true">
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<Skeleton height={32} width="60%" style={{ marginBottom: 20 }} ariaLabel="Loading title" />
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<Skeleton
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height={200}
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width="100%"
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borderRadius={8}
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style={{ marginBottom: 16 }}
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ariaLabel="Loading chart"
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/>
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{Array.from({ length: lines }).map((_, i) => (
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<Skeleton key={i} height={16} width={`${70 + Math.random() * 30}%`} />
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<Skeleton
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key={i}
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height={16}
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width={`${70 + Math.random() * 30}%`}
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ariaLabel={`Loading content line ${i + 1}`}
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/>
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))}
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</div>
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);
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