// import Telescope from 'meteor/nova:lib';
// import Posts from '../collection.js';
// // import Comments from "meteor/nova:comments";
// import Users from 'meteor/nova:users';

// Posts._ensureIndex({"status": 1, "postedAt": 1});

// // ------------------------------------- Helpers -------------------------------- //

// /**
//  * @summary Get all users relevant to a list of posts
//  * (authors of the listed posts, and first four commenters of each post)
//  * @param {Object} posts
//  */
// const getPostsListUsers = posts => {

//   // add the userIds of each post authors
//   let userIds = _.pluck(posts.fetch(), 'userId');

//   // for each post, also add first four commenter's userIds to userIds array
//   posts.forEach(function (post) {
//     userIds = userIds.concat(_.first(post.commenters,4));
//   });

//   userIds = _.unique(userIds);

//   return Users.find({_id: {$in: userIds}}, {fields: Users.publishedFields.list});
 
// };

// /**
//  * @summary Get all users relevant to a single post
//  * (author of the current post, authors of its comments, and upvoters & downvoters of the post)
//  * @param {Object} post
//  */
// const getSinglePostUsers = post => {

//   let users = [post.userId]; // publish post author's ID

//   /* 
//   NOTE: to avoid circular dependencies between nova:posts and nova:comments, 
//   use callback hook to get comment authors
//   */
//   users = Telescope.callbacks.run("posts.single.getUsers", users, post);
  
//   // add upvoters
//   if (post.upvoters && post.upvoters.length) {
//     users = users.concat(post.upvoters);
//   }

//   // add downvoters
//   if (post.downvoters && post.downvoters.length) {
//     users = users.concat(post.downvoters);
//   }

//   // remove any duplicate IDs
//   users = _.unique(users);

//   return Users.find({_id: {$in: users}}, {fields: Users.publishedFields.list});
// };

// // ------------------------------------- Publications -------------------------------- //

// /**
//  * @summary Publish a list of posts, along with the users corresponding to these posts
//  * @param {Object} terms
//  */
// Meteor.publish('posts.list', function (terms) {

//   // this.unblock(); // causes bug where publication returns 0 results  

//   this.autorun(function () {
    
//     const currentUser = this.userId && Users.findOne(this.userId);

//     terms.currentUserId = this.userId; // add currentUserId to terms
//     const {selector, options} = Posts.parameters.get(terms);
    
//     Counts.publish(this, terms.listId, Posts.find(selector, options), {noReady: true});

//     options.fields = Posts.publishedFields.list;

//     const posts = Posts.find(selector, options);

//     // note: doesn't work yet :(
//     // CursorCounts.set(terms, posts.count(), this.connection.id);

//     const users = Tracker.nonreactive(function () {
//       return getPostsListUsers(posts);
//     });

//     return Users.canDo(currentUser, "posts.view.approved.all") ? [posts, users] : [];
  
//   });

// });

// /**
//  * @summary Publish a single post, along with all relevant users
//  * @param {Object} terms
//  */
// Meteor.publish('posts.single', function (terms) {

//   check(terms, Match.OneOf({_id: String}, {_id: String, slug: Match.Any}));

//   const currentUser = this.userId && Users.findOne(this.userId);
//   const options = {fields: Posts.publishedFields.single};
//   const posts = Posts.find(terms._id, options);
//   const post = posts.fetch()[0];

//   if (post) {
//     const users = getSinglePostUsers(post);
//     return Users.canView(currentUser, post) ? [posts, users] : [];
//   } else {
//     console.log(`// posts.single: no post found for _id “${terms._id}”`)
//     return [];
//   }

// });