index.js

const config = require("./config");
const twit = require("twit");

const T = new twit(config);

// Utility function - Gives unique elements from an array
function onlyUnique(value, index, self) {
  return self.indexOf(value) === index;
}

function retweet(searchText) {
  // Params to be passed to the 'search/tweets' API endpoint
  let params = {
    q: searchText + "",
    result_type: "mixed",
    count: 25,
  };

  T.get(
    "search/tweets",
    params,
    function (err_search, data_search, response_search) {
      let tweets = data_search.statuses;
      if (!err_search) {
        let tweetIDList = [];
        for (let tweet of tweets) {
          // To avoid duplication of retweets
          if (tweet.text.startsWith("RT @")) {
            // If tweet text starts with "RT @" then it is a retweeted tweet,
            // with a different 'id_str' than the original
            console.log("\nStarts with RT@, adding retweeted status id_str");
            if (tweet.retweeted_status) {
              tweetIDList.push(tweet.retweeted_status.id_str);
            } else {
              tweetIDList.push(tweet.id_str);
            }
          } else {
            tweetIDList.push(tweet.id_str);
          }
        }

        // Get only unique entries
        tweetIDList = tweetIDList.filter(onlyUnique);

        console.log("TweetID LIST = \n" + tweetIDList);

        // Call the 'statuses/retweet/:id' API endpoint for retweeting EACH of the tweetID
        for (let tweetID of tweetIDList) {
          T.post(
            "statuses/retweet/:id",
            { id: tweetID },
            function (err_rt, data_rt, response_rt) {
              if (!err_rt) {
                console.log("\n\nRetweeted! ID - " + tweetID);
              } else {
                console.log("\nError... Duplication maybe... " + tweetID);
                console.log("Error = " + err_rt);
              }

              // For debugging
              // console.log("Data = " + data_rt.text)
              // console.log(data_rt)
            }
          );
        }
      } else {
        console.log("Error while searching" + err_search);
        process.exit(1);
      }
    }
  );
}

// Run every 60 seconds
setInterval(() => {
  retweet("#100DaysOfCode OR #javascript");
}, 600000);