eletrotupi / tcc/ commit / 5f12877

api/insights: add an app-timezone day helper

Day-granular insights need a boundary the server cannot give from its own
process zone, which is UTC in the container. The helper resolves a day in
America/Sao_Paulo so the window matches the user's local day
Pedro Lucas Porcellis porcellis@eletrotupi.com · 12 days ago 5f128778e17bb00138230b7adc25bc7e69505c1f Browse files
Parents 4e0e578
Changed files
1
Additions
+32
Deletions
0
api/src/lib/queue/processors/insights/utils.ts modified+32
api/src/lib/queue/processors/insights/utils.ts
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import { tz } from "@date-fns/tz";
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import { addDays, startOfDay } from "date-fns";
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export function rollingPeriod(days = 7) {
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  const periodEnd = new Date();
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  const periodStart = new Date();
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  periodStart.setDate(periodEnd.getDate() - days);
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  return {
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    periodStart: periodStart.toISOString(),
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    periodEnd: periodEnd.toISOString(),
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  };
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}
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const APP_TIMEZONE = tz("America/Sao_Paulo");
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// Start of the day containing `date`, in the app's timezone
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export function startOfAppDay(date: Date = new Date()): Date {
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  return startOfDay(date, { in: APP_TIMEZONE });
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}
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// The app-timezone day containing `date`, as a half-open [start, end) window
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export function appDayWindow(date: Date = new Date()): {
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  start: Date;
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  end: Date;
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} {
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  const start = startOfDay(date, { in: APP_TIMEZONE });
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  const end = startOfDay(addDays(start, 1, { in: APP_TIMEZONE }), {
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    in: APP_TIMEZONE,
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  });
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  return { start, end };
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}
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export function appDayPeriod(date: Date = new Date()): {
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  periodStart: string;
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  periodEnd: string;
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} {
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  const { start, end } = appDayWindow(date);
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  return { periodStart: start.toISOString(), periodEnd: end.toISOString() };
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}