jellyfin-discord-bot/server/helper/dateHelper.ts

import { format, isToday, toDate } from "date-fns";
import { utcToZonedTime } from "date-fns-tz"
import { GuildScheduledEvent } from "discord.js";
import { logger } from "../logger";
import de from "date-fns/locale/de";

export function createDateStringFromEvent(event: GuildScheduledEvent, requestId: string, guildId?: string): string {
  if (!event.scheduledStartAt) {
    logger.error("Event has no start. Cannot create dateString.", { guildId, requestId })
    return `"habe keinen Startzeitpunkt ermitteln können"`
  }

  const timeZone = 'Europe/Berlin'
  const zonedDateTime = utcToZonedTime(event.scheduledStartAt, timeZone)
  const time = format(zonedDateTime, "HH:mm", { locale: de })

  if (isToday(zonedDateTime)) {
    return `heute um ${time}`
  }

  const date = format(zonedDateTime, "eeee dd.MM", { locale: de })
  return `am ${date} um ${time}`
}