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修复图表时区计算和 stale 缓存展示

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- formatCityLocalDate 改为纯 UTC+cityOffset+getUTC*，不再受浏览器时区影响
- 新增 formatCityLocalDateTime 统一更新时间的时区处理
- 缓存过期时静默后台刷新，不转 loading spinner
- showingStaleDetail 现在不依赖 detailError 就显示橙色标签
This commit is contained in:
2569718930@qq.com
2026-06-16 05:18:23 +08:00
parent f6fbff9a28
commit 9dc0d598a0
3 changed files with 66 additions and 17 deletions
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frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
+29 -16
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@@ -103,13 +103,27 @@ function peakGlowTitle(
function formatCityLocalDate(tzOffsetSeconds: number | null | undefined) {
const cityOffsetMs = (tzOffsetSeconds ?? 0) * 1000;
const cityNow = new Date(Date.now() + cityOffsetMs + new Date().getTimezoneOffset() * 60_000);
const y = cityNow.getFullYear();
const m = String(cityNow.getMonth() + 1).padStart(2, "0");
const d = String(cityNow.getDate()).padStart(2, "0");
const cityNow = new Date(Date.now() + cityOffsetMs);
const y = cityNow.getUTCFullYear();
const m = String(cityNow.getUTCMonth() + 1).padStart(2, "0");
const d = String(cityNow.getUTCDate()).padStart(2, "0");
return `${y}-${m}-${d}`;
}
function formatCityLocalDateTime(tzOffsetSeconds: number | null | undefined) {
const nowUtc = Date.now();
const cityOffsetMs = (tzOffsetSeconds ?? 0) * 1000;
const cityNow = new Date(nowUtc + cityOffsetMs);
const pad = (n: number) => String(n).padStart(2, "0");
const y = cityNow.getUTCFullYear();
const mo = pad(cityNow.getUTCMonth() + 1);
const d = pad(cityNow.getUTCDate());
const hh = pad(cityNow.getUTCHours());
const mm = pad(cityNow.getUTCMinutes());
const ss = pad(cityNow.getUTCSeconds());
return `${y}-${mo}-${d} ${hh}:${mm}:${ss}`;
}
function getLiveTempFromHourly(data: HourlyForecast) {
return validNumber(data?.airportCurrent?.temp) ?? validNumber(data?.airportPrimary?.temp) ?? null;
}
@@ -878,6 +892,9 @@ export function LiveTemperatureThresholdChart({
return;
}
// ── Stale-while-revalidate: show cached data, refresh in background ──
const hasStaleCache = cached && !hasFreshCache;
if (
!shouldFetchCityDetailForChart({
city,
@@ -899,7 +916,11 @@ export function LiveTemperatureThresholdChart({
commitHourlySnapshot((prev) => mergeRowObservationIntoHourly(prev, getLatestRowSnapshot()));
setShowingStaleDetail(false);
}
setIsHourlyLoading(true);
// Stale cache: don't show loading spinner, refresh silently
if (!hasStaleCache) {
setIsHourlyLoading(true);
}
let cancelled = false;
let retryScheduled = false;
let retryTimer: ReturnType<typeof setTimeout> | null = null;
@@ -1292,17 +1313,7 @@ export function LiveTemperatureThresholdChart({
);
const formattedUpdateTime = useMemo(() => {
const nowUtc = Date.now();
const cityOffsetMs = (row?.tz_offset_seconds ?? 0) * 1000;
const cityNow = new Date(nowUtc + cityOffsetMs + new Date().getTimezoneOffset() * 60_000);
const pad = (n: number) => String(n).padStart(2, "0");
const y = cityNow.getFullYear();
const mo = pad(cityNow.getMonth() + 1);
const d = pad(cityNow.getDate());
const hh = pad(cityNow.getHours());
const mm = pad(cityNow.getMinutes());
const ss = pad(cityNow.getSeconds());
return `${y}-${mo}-${d} ${hh}:${mm}:${ss}`;
return formatCityLocalDateTime(row?.tz_offset_seconds);
}, [row]);
const cityThresholds = useMemo(() => {
@@ -1692,6 +1703,8 @@ export const __getLiveObservationLabelsForTest = getLiveObservationLabels;
export const __getObservationDisplayMetricsForTest = getObservationDisplayMetrics;
export const __getPeakGlowStateForTest = getPeakGlowState;
export const __getWundergroundDailyHighForTest = getWundergroundDailyHigh;
export const __formatCityLocalDateForTest = formatCityLocalDate;
export const __formatCityLocalDateTimeForTest = formatCityLocalDateTime;
export const __getInitialDetailLoadDelayMsForTest = getInitialDetailLoadDelayMs;
export const __shouldFetchCityDetailForChartForTest = shouldFetchCityDetailForChart;
export const __shouldPollLiveChartForTest = shouldPollLiveChart;