wekan/server/publications/boards.js

// This is the publication used to display the board list. We publish all the
// non-archived boards:
// 1. that the user is a member of
// 2. the user has starred
Meteor.publish('boards', function() {
  // Ensure that the user is connected. If it is not, we need to return an empty
  // array to tell the client to remove the previously published docs.
  if (!Match.test(this.userId, String))
    return [];

  // Defensive programming to verify that starredBoards has the expected
  // format -- since the field is in the `profile` a user can modify it.
  const {starredBoards = []} = Users.findOne(this.userId).profile;
  check(starredBoards, [String]);

  return Boards.find({
    archived: false,
    $or: [
      {
        _id: { $in: starredBoards },
        permission: 'public',
      },
      { members: { $elemMatch: { userId: this.userId, isActive: true }}},
    ],
  }, {
    fields: {
      _id: 1,
      archived: 1,
      slug: 1,
      title: 1,
      description: 1,
      color: 1,
      members: 1,
      permission: 1,
      type: 1,
    },
  });
});

Meteor.publish('archivedBoards', function() {
  if (!Match.test(this.userId, String))
    return [];

  return Boards.find({
    archived: true,
    members: {
      $elemMatch: {
        userId: this.userId,
        isAdmin: true,
      },
    },
  }, {
    fields: {
      _id: 1,
      archived: 1,
      slug: 1,
      title: 1,
    },
  });
});

Meteor.publishRelations('board', function(boardId) {
  this.unblock();
  check(boardId, String);
  const thisUserId = this.userId;

  this.cursor(Boards.find({
    _id: boardId,
    archived: false,
    // If the board is not public the user has to be a member of it to see
    // it.
    $or: [
      { permission: 'public' },
      { members: { $elemMatch: { userId: this.userId, isActive: true }}},
    ],
  // Sort required to ensure oplog usage
  }, { limit: 1, sort: { _id: 1 } }), function(boardId, board) {
    this.cursor(Lists.find({ boardId }));
    this.cursor(Swimlanes.find({ boardId }));
    this.cursor(Integrations.find({ boardId }));
    this.cursor(CustomFields.find({ boardId }, { sort: { name: 1 } }));

    // Cards and cards comments
    // XXX Originally we were publishing the card documents as a child of the
    // list publication defined above using the following selector `{ listId:
    // list._id }`. But it was causing a race condition in publish-composite,
    // that I documented here:
    //
    //   https://github.com/englue/meteor-publish-composite/issues/29
    //
    // cottz:publish had a similar problem:
    //
    //   https://github.com/Goluis/cottz-publish/issues/4
    //
    // The current state of relational publishing in meteor is a bit sad,
    // there are a lot of various packages, with various APIs, some of them
    // are unmaintained. Fortunately this is something that will be fixed by
    // meteor-core at some point:
    //
    //   https://trello.com/c/BGvIwkEa/48-easy-joins-in-subscriptions
    //
    // And in the meantime our code below works pretty well -- it's not even a
    // hack!

    // Gather queries and send in bulk
    const cardComments = this.join(CardComments);
    cardComments.selector = (_ids) => ({ cardId: _ids });
    const attachments = this.join(Attachments);
    attachments.selector = (_ids) => ({ cardId: _ids });
    const checklists = this.join(Checklists);
    checklists.selector = (_ids) => ({ cardId: _ids });
    const checklistItems = this.join(ChecklistItems);
    checklistItems.selector = (_ids) => ({ cardId: _ids });
    const parentCards = this.join(Cards);
    parentCards.selector = (_ids) => ({ parentId: _ids });
    const boards = this.join(Boards);
    const subCards = this.join(Cards);

    this.cursor(Cards.find({ boardId }), function(cardId, card) {
      if (card.type === 'cardType-linkedCard') {
        const impCardId = card.linkedId;
        subCards.push(impCardId);
        cardComments.push(impCardId);
        attachments.push(impCardId);
        checklists.push(impCardId);
        checklistItems.push(impCardId);
      } else if (card.type === 'cardType-linkedBoard') {
        boards.push(card.linkedId);
      }
      cardComments.push(cardId);
      attachments.push(cardId);
      checklists.push(cardId);
      checklistItems.push(cardId);
      parentCards.push(cardId);
    });

    // Send bulk queries for all found ids
    subCards.send();
    cardComments.send();
    attachments.send();
    checklists.send();
    checklistItems.send();
    boards.send();

    if (board.members) {
      // Board members. This publication also includes former board members that
      // aren't members anymore but may have some activities attached to them in
      // the history.
      const memberIds = _.pluck(board.members, 'userId');

      // We omit the current user because the client should already have that data,
      // and sending it triggers a subtle bug:
      // https://github.com/wefork/wekan/issues/15
      this.cursor(Users.find({
        _id: { $in: _.without(memberIds, thisUserId)},
      }, { fields: {
        'username': 1,
        'profile.fullname': 1,
        'profile.avatarUrl': 1,
      }}));

      this.cursor(presences.find({ userId: { $in: memberIds } }));
    }
  });

  return this.ready();
});