Comments._ensureIndex({postId: 1});
Comments._ensureIndex({parentCommentId: 1});

// Publish a list of comments

Meteor.publish('comments.list', function(terms) {
  
  this.unblock();

  if (this.userId) { // add currentUserId to terms if a user is logged in
    terms.currentUserId = this.userId; 
  }
  
  if(Users.can.viewById(this.userId)){
    var parameters = Comments.parameters.get(terms);
    var comments = Comments.find(parameters.find, parameters.options);
  
    // if there are comments, find out which posts were commented on
    var commentedPostIds = comments.count() ? _.pluck(comments.fetch(), 'postId') : [];
    return [
      comments,
      Posts.find({_id: {$in: commentedPostIds}})
    ];
  }
});

// // Publish a single comment

// Meteor.publish('singleCommentAndChildren', function(commentId) {

//   check(commentId, String);

//   this.unblock();
  
//   if(Users.can.viewById(this.userId)){
//     // publish both current comment and child comments
//     var commentIds = [commentId];
//     var childCommentIds = _.pluck(Comments.find({parentCommentId: commentId}, {fields: {_id: 1}}).fetch(), '_id');
//     commentIds = commentIds.concat(childCommentIds);
//     return Comments.find({_id: {$in: commentIds}}, {sort: {score: -1, postedAt: -1}});
//   }
//   return [];
// });

// // Publish the post related to the current comment

// Meteor.publish('commentPost', function(commentId) {

//   check(commentId, String);

//   this.unblock();

//   if(Users.can.viewById(this.userId)){
//     var comment = Comments.findOne(commentId);
//     return Posts.find({_id: comment && comment.postId});
//   }
//   return [];
// });

// // Publish author of the current comment, and author of the post related to the current comment

// Meteor.publish('commentUsers', function(commentId) {

//   check(commentId, String);

//   this.unblock();
    
//   var userIds = [];

//   if(Users.can.viewById(this.userId)){

//     var comment = Comments.findOne(commentId);

//     if (!!comment) {
//       userIds.push(comment.userId);

//       var post = Posts.findOne(comment.postId);
//       if (!!post) {
//         userIds.push(post.userId);
//       }

//       return Meteor.users.find({_id: {$in: userIds}}, {fields: Users.pubsub.publicProperties});
    
//     }

//   }

//   return [];

// });