import { I18n } from "next-i18next"; import { RRule } from "rrule"; import dayjs, { Dayjs } from "@calcom/dayjs"; import { detectBrowserTimeFormat } from "@calcom/lib/timeFormat"; import { inferQueryOutput } from "@calcom/trpc/react"; import type { RecurringEvent } from "@calcom/types/Calendar"; import { parseZone } from "./parseZone"; const processDate = (date: string | null | Dayjs, i18n: I18n) => { const parsedZone = parseZone(date); if (!parsedZone?.isValid()) return "Invalid date"; const formattedTime = parsedZone?.format(detectBrowserTimeFormat); return formattedTime + ", " + dayjs(date).toDate().toLocaleString(i18n.language, { dateStyle: "full" }); }; export const parseDate = (date: string | null | Dayjs, i18n: I18n) => { if (!date) return ["No date"]; return processDate(date, i18n); }; export const parseRecurringDates = ( { startDate, timeZone, recurringEvent, recurringCount, }: { startDate: string | null | Dayjs; timeZone?: string; recurringEvent: RecurringEvent | null; recurringCount: number; }, i18n: I18n ): [string[], Date[]] => { // eslint-disable-next-line @typescript-eslint/no-unused-vars const { count, ...restRecurringEvent } = recurringEvent || {}; const rule = new RRule({ ...restRecurringEvent, count: recurringCount, dtstart: new Date(dayjs(startDate).valueOf()), }); const startUtcOffset = dayjs(startDate).utcOffset(); // UTC still need to have DST applied, rrule does not do this. const times = rule.all().map((t) => { // applying the DST offset. return dayjs.utc(t).add(startUtcOffset - dayjs(t).utcOffset(), "minute"); }); const dateStrings = times.map((t) => { // finally; show in local timeZone again return processDate(t.tz(timeZone), i18n); }); return [dateStrings, times.map((t) => t.toDate())]; };