habitica/website/server/libs/inbox/index.js

import { inboxModel as Inbox } from '../../models/message';

const PM_PER_PAGE = 10;

export async function getUserInbox (user, options = {asArray: true, page: 0}) {
  if (typeof options.asArray === 'undefined') {
    options.asArray = true;
  }

  let query = Inbox
    .find({ownerId: user._id})
    .sort({timestamp: -1});

  if (typeof options.page !== 'undefined') {
    query = query
      .limit(PM_PER_PAGE)
      .skip(PM_PER_PAGE * Number(options.page));
  }

  const messages = (await query.exec()).map(msg => msg.toJSON());

  if (options.asArray) {
    return messages;
  } else {
    const messagesObj = {};
    messages.forEach(msg => messagesObj[msg._id] = msg);

    return messagesObj;
  }
}

export async function getUserInboxMessage (user, messageId) {
  return Inbox.findOne({ownerId: user._id, _id: messageId}).exec();
}

export async function deleteMessage (user, messageId) {
  const message = await Inbox.findOne({_id: messageId, ownerId: user._id }).exec();
  if (!message) return false;
  await Inbox.remove({_id: message._id, ownerId: user._id}).exec();

  return true;
}

export async function clearPMs (user) {
  user.inbox.newMessages = 0;

  await Promise.all([
    user.save(),
    Inbox.remove({ownerId: user._id}).exec(),
  ]);
}