Function preparePushNotif

keyserver/src/push/send.js:201–519

(input: {
  keyserverID: string,
  notifInfo: CollapsableNotifInfo,
  userID: string,
  pushUserInfo: PushUserInfo,
  unreadCount: number,
  threadInfos: {
    +[threadID: string]: ThreadInfo,
  },
  userInfos: { +[userID: string]: GlobalUserInfo },
  dbIDs: string[], // mutable
  rowsToSave: Map<string, NotificationRow>, // mutable
})

};

async function preparePushNotif(input: {
  keyserverID: string,
  notifInfo: CollapsableNotifInfo,
  userID: string,
  pushUserInfo: PushUserInfo,
  unreadCount: number,
  threadInfos: {
    +[threadID: string]: ThreadInfo,
  },
  userInfos: { +[userID: string]: GlobalUserInfo },
  dbIDs: string[], // mutable
  rowsToSave: Map<string, NotificationRow>, // mutable
}): Promise<?$ReadOnlyArray<PreparePushResult>> {
  const {
    keyserverID,
    notifInfo,
    userID,
    pushUserInfo,
    unreadCount,
    threadInfos,
    userInfos,
    dbIDs,
    rowsToSave,
  } = input;

  const hydrateMessageInfo = (rawMessageInfo: RawMessageInfo) =>
    createMessageInfo(rawMessageInfo, userID, userInfos, threadInfos);
  const newMessageInfos = [];
  const newRawMessageInfos = [];
  for (const newRawMessageInfo of notifInfo.newMessageInfos) {
    const newMessageInfo = hydrateMessageInfo(newRawMessageInfo);
    if (newMessageInfo) {
      newMessageInfos.push(newMessageInfo);
      newRawMessageInfos.push(newRawMessageInfo);
    }
  }
  if (newMessageInfos.length === 0) {
    return null;
  }
  const existingMessageInfos = notifInfo.existingMessageInfos
    .map(hydrateMessageInfo)
    .filter(Boolean);
  const allMessageInfos = sortMessageInfoList([
    ...newMessageInfos,
    ...existingMessageInfos,
  ]);
  const [firstNewMessageInfo, ...remainingNewMessageInfos] = newMessageInfos;
  const { threadID } = firstNewMessageInfo;

  const threadInfo = threadInfos[threadID];
  const parentThreadInfo = threadInfo.parentThreadID
    ? threadInfos[threadInfo.parentThreadID]
    : null;

  const username = userInfos[userID] && userInfos[userID].username;

  const { notifAllowed, badgeOnly } = await userAllowsNotif({
    subscription: {