How to refresh a Twit stream ? (Npm module & Twitter API) - node.js

Question

I want to refresh a Twit stream.
I have a Twitter stream made with the npm module Twit (you can find it here: https://github.com/ttezel/twit ).
Here is my code:
Researches.find().observeChanges({
added: function(){
hashArray = Researches.find().fetch();
hashCount = Researches.find().count();
for(i=0; i<hashCount; i++){
hashArray[i]= hashArray[i].hashtag;
}
}
});
stream = T.stream('statuses/filter', {track: hashArray});
//Launch stream
stream.on('tweet', Meteor.bindEnvironment(function(tweet) {
//Get the hashtag of the tweet
tweetText = tweet.text;
tweetText = tweetText.toLowerCase();
//Get the hashtag of the current tweet
for(i=0; i<hashCount; i++){
var hashCompare = hashArray[i];
hashCompare = hashCompare.toLowerCase();
var isInString = tweetText.search(hashCompare);
if(isInString>=0)
goodHash = hashArray[i];
}
// Get the tweet informations
tweetToInsert = {
user: tweet.user.screen_name,
tweet: tweet.text,
picture: tweet.user.profile_image_url,
date: new Date().getTime(),
hashtag: goodHash
};
matchTweet = Tweets.findOne({tweet:tweetToInsert.tweet});
//Store tweets
if(matchTweet || (lastTweet.user == tweetToInsert.user) || (lastTweet.tweet == tweetToInsert.tweet)){
} else {
console.log(tweetToInsert.tweet);
Tweets.insert(tweetToInsert, function(error) {
if(error)
console.log(error);
});
}
//Store last tweet
lastTweet = {
user: tweetToInsert.user,
tweet: tweetToInsert.tweet
}
//Delete tweet overflow
nbTweet = Tweets.find({hashtag: goodHash}).count();
tweetToDelete = nbTweet-25;
if(nbTweet>25){
for(i=0; i<tweetToDelete;i++){
idDelete = Tweets.findOne({hashtag: goodHash});
Tweets.remove(idDelete._id);
}
}
}));
As you can see, I have an observe on my Researches Collection, with which I made an array with all the hashtag. Then, I made my stream using this array to track every of this hashtag.
Now, here is my problem. When I had a new hashtag to my collection, my array update himself with the new hashtag and is good. The problem is that the stream doesn't update himself.
What I have tried
I have tried to .stop() the stream, accorded to Twit documentation (this works fine), but when I tried to restart him with .start(), it don't work.
Here is the code I've tried:
Researches.find().observeChanges({
added: function(){
hashArray = Researches.find().fetch();
hashCount = Researches.find().count();
for(i=0; i<hashCount; i++){
hashArray[i]= hashArray[i].hashtag;
}
if(stream){
stream.stop();
stream.start();
}
}
});
So, do you know how to refresh/update a Twit stream or delete and created a new one, each time an hashtag is added to the collection.
Thanks

Answer 1

This github issue & comment answers your question: https://github.com/ttezel/twit/issues/90#issuecomment-41247402
Basically you will need to make a second stream and close the first one when you refresh your list.
var Twit = require('twit');
var twit = new Twit(config);
var stream1 = twit.stream('statuses/filter', { track: [ '#yolo' ] });
// ... some time passes ...
// initiate a new streaming connection with our updated track list
var stream2 = twit.stream('statuses/filter', { track: [ '#yolo', '#fun' ] });
stream2.once('connected', function (res) {
console.log('second stream connected')
// stop the first stream ASAP so twitter doesn't block us
stream1.stop();
stream2.on('tweet', function (tweet) {
// handle tweets
});
});