Awesome

Robinhoops

Robinhoops is a Robinhood.com clone built with Rails and React/Redux that allows users to invest in the top NBA athletes.

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Athletes' prices are updated every few seconds based on their stats and recent overall Twitter sentiment.

Twitter Sentiment

Credit to sentimental gem Robinhoops scrapes Twitter for recent tweets and then maps each word and assigns an overall score based on each tweet.

Using Nokogiri and HTTParty

    def self.scrape_tweeter(athlete_name)
        names = athlete_name.split(" ")
        firstName = names[0]
        lastName = names[1]
       url = "https://twitter.com/search?q=" + lastName + "%20" + firstName + "&src=typd"

       unparsed_page = HTTParty.get(url)
       parsed_page = Nokogiri::HTML(unparsed_page)

       tweetDivs = parsed_page.css('div.tweet')

       scrappedTweets = []
       tweetDivs.each do |div|
        tweetBody = div.css('p.TweetTextSize.js-tweet-text.tweet-text').text
        tweetUsername = div.css("span.username").text
        tweetTimestamp = div.css("span._timestamp").text
        scrappedTweets.push({tweetBody: tweetBody, tweetUsername: tweetUsername, time_created: tweetTimestamp})
    end

       return $analyzer.score scrappedTweets
    end

How it Works

All new users receive $2000.00 and a free stock/athlete.

To be really specific, Robinhoops creates a new user and then store snapshots of portfolio value and twitter sentiment every 20 seconds. These data points are then used to graph stock and user portfolio value volatility. An athlete's price will only fluctuate if users on trading that specific stock.

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Usage

First, install bundles

$ bundle install

Install node dependencies

$ npm install

Start local rails server

$ rails server

Credits

The following packages/libraries were used in the development of Robinhoops.io