Vulcan/packages/telescope-posts/lib/parameters.js

/**
 * Gives an object containing the appropriate find
 * and options arguments for the subscriptions's Posts.find()
 * @param {Object} terms
 */
Posts.getSubParams = function (terms) {

  // add this to ensure all post publications pass audit-arguments-check
  check(terms, Match.Any);

  var maxLimit = 200;

  // console.log(terms)

  // note: using jquery's extend() with "deep" parameter set to true instead of shallow _.extend()
  // see: http://api.jquery.com/jQuery.extend/

  // initialize parameters by extending baseParameters object, to avoid passing it by reference
  var parameters = Telescope.utils.deepExtend(true, {}, Posts.views.baseParameters);

  // if view is not defined, default to "top"
  var view = !!terms.view ? Telescope.utils.dashToCamel(terms.view) : 'top';

  // get query parameters according to current view
  if (typeof Posts.views[view] !== 'undefined')
    parameters = Telescope.utils.deepExtend(true, parameters, Posts.views[view](terms));

  // extend sort to sort posts by _id to break ties
  Telescope.utils.deepExtend(true, parameters, {options: {sort: {_id: -1}}});

  // if a limit was provided with the terms, add it too (note: limit=0 means "no limit")
  if (typeof terms.limit !== 'undefined')
    _.extend(parameters.options, {limit: parseInt(terms.limit)});

  // limit to "maxLimit" posts at most when limit is undefined, equal to 0, or superior to maxLimit
  if(!parameters.options.limit || parameters.options.limit === 0 || parameters.options.limit > maxLimit) {
    parameters.options.limit = maxLimit;
  }

  // hide future scheduled posts unless "showFuture" is set to true or postedAt is already defined
  if (!parameters.showFuture && !parameters.find.postedAt)
    parameters.find.postedAt = {$lte: new Date()};

  // filter by category if category _id is provided (unless categories parameter already specificed)
  // NOTE: this is a temporary fix because views cannot currently be combined
  if (!!terms.category && !parameters.find.categories) {
    var categoryId = Categories.findOne({slug: terms.category})._id;
    parameters.find.categories = {$in: [categoryId]};
  }
  
  // console.log(parameters);

  return parameters;
};