Refactor part 2: Electric Boogaloo. Standardize way of passing filter parameters.

src/components/hooks/useDateParameters.ts

@@ -0,0 +1,18 @@
+import { useDateRange } from './useDateRange';
+import { useTimezone } from './useTimezone';
+
+export function useDateParameters(websiteId: string) {
+  const {
+    dateRange: { startDate, endDate, unit },
+  } = useDateRange(websiteId);
+  const { timezone, toUtc } = useTimezone();
+
+  return {
+    startAt: +toUtc(startDate),
+    endAt: +toUtc(endDate),
+    startDate: toUtc(startDate).toISOString(),
+    endDate: toUtc(endDate).toISOString(),
+    unit,
+    timezone,
+  };
+}