session-desktop/ts/models/timerNotifications.ts

import { PubkeyType } from 'libsession_util_nodejs';
import { ConvoHub } from '../session/conversations';
import { PropsForExpirationTimer } from '../state/ducks/conversations';
import { PubKey } from '../session/types';
import { UserUtils } from '../session/utils';
import { TimerOptions } from '../session/disappearing_messages/timerOptions';
import { tr, type TrArgs } from '../localization/localeTools';

export function getTimerNotificationStr({
  expirationMode,
  timespanSeconds,
  convoId,
  author,
  isGroup,
}: Pick<PropsForExpirationTimer, 'expirationMode' | 'timespanSeconds'> & {
  author: PubkeyType;
  convoId: string;
  isGroup: boolean;
}): TrArgs {
  const is03group = PubKey.is03Pubkey(convoId);
  const authorIsUs = author === UserUtils.getOurPubKeyStrFromCache();
  const isLegacyGroup = isGroup && !is03group;
  const timespanText = TimerOptions.getName(timespanSeconds || 0);
  const disabled = !timespanSeconds || timespanSeconds <= 0;

  const authorName = ConvoHub.use().getNicknameOrRealUsernameOrPlaceholder(author);

  const disappearing_messages_type =
    expirationMode === 'deleteAfterRead'
      ? tr('disappearingMessagesTypeRead')
      : tr('disappearingMessagesTypeSent');

  if (isLegacyGroup || isGroup) {
    if (disabled) {
      return authorIsUs
        ? {
            token: 'disappearingMessagesTurnedOffYouGroup',
          }
        : {
            token: 'disappearingMessagesTurnedOffGroup',
            name: authorName,
          };
    }
    return authorIsUs
      ? {
          token: 'disappearingMessagesSetYou',
          time: timespanText,
          disappearing_messages_type,
        }
      : {
          token: 'disappearingMessagesSet',
          name: authorName,
          time: timespanText,
          disappearing_messages_type,
        };
  }

  // legacy groups and groups are handled above.
  // This can only be a private chat or Note to Self.
  if (disabled) {
    return authorIsUs
      ? {
          token: 'disappearingMessagesTurnedOffYou',
        }
      : {
          token: 'disappearingMessagesTurnedOff',
          name: authorName,
        };
  }

  return authorIsUs
    ? {
        token: 'disappearingMessagesSetYou',
        time: timespanText,
        disappearing_messages_type,
      }
    : {
        token: 'disappearingMessagesSet',
        time: timespanText,
        disappearing_messages_type,
        name: authorName,
      };
}