For LyricallyChallenged - https://github.com/FridaSjoholm/lyrically-challenged

To make a new Madlib.md

#Make a new Madlib Example: search with sentiment

##Make a button to direct to your madlib in tracks/index.html.erb

      <div class="item">
        <div class="carousel-caption container">
          <div class="row">
            <div class="col-sm-7">

              <%= render "tracks/madlibs/02_sentiment" %>


              <div class="portfolio-wrapper" >
                <div class="col-md-12">
                  <ul class="filter">
                    <li>Input forms:</li>
                    <li data-target="#home-carousel" data-slide-to="0"><a>Simple</a></li>
                    <li data-target="#home-carousel" data-slide-to="1"><a class="active">Sentiment</a></li>
                    <li data-target="#home-carousel" data-slide-to="2" ><a>Party</a></li>

                  </ul><!--/#portfolio-filter-->

                </div>
              </div>
              <img
                class="f-pending-message"
                style="width:500px;height:180px;display:none;"
                src="https://userscontent2.emaze.com/images/c99e58c5-cc05-4af4-ab93-4614a40e077b/386d9c23-88e2-487a-b84f-47bba61bb4a6.gif"
              />
            </div>
          </div>
        </div>
      </div>

##Make a view for your madlib in app/views/madlibs/

<%= form_tag("/search_with_sentiment", method: "get", class: "form-search", remote: true) do %>

 <h1>Looking for a song about
  <%= text_field_tag(:word, "", placeholder:"(topic)") %>

  that makes me feel
  <select name="feeling" class="dotted-btn">
    <ul class="dropdown-menu">
    <li><option value="happy">happy</option></li>
    <li><option value="calm">calm</option></li>
    <li><option value="angry">angry</option></li>
    <li><option value="sad">sad</option></li>
    </ul>
  </select>

  <%= submit_tag("Search", class:"btn btn-send") %>

  </h1>
<% end %> <!-- form -->

##Make a route in config/routes

get "/search_with_sentiment", to: "tracks#search_with_sentiment"

##Make a method in tracks controller

  #Search by keyword and sentiment
  def search_with_sentiment
    @form_feeling = params[:feeling]
    p "in search_with_sentiment"
    @tracks = TracksHelper::Track.lyrics_keywords(params[:word], 20).select{ |t| t.match_sentiment(@form_feeling)}
    respond_to do |format|
      if @tracks.length > 0
        format.html {render :show, layout: false}
      else
        flash[:danger] = 'There was a problem'
        format.html { render :index }
        format.json { }
      end
    end
  end

##Make a helper method in the Tracks Helper

    #For 02_sentiment madlib
    #Filter by matching given feeling
    def match_sentiment(form_feeling)
        if form_feeling == "sad"
          p "You want to be sad"
          audio_features.valence < 0.4
        elsif form_feeling == "angry"
          p "You want to be angry"
          audio_features.valence >= 0.4 && audio_features.valence <= 0.6
        elsif form_feeling == "calm"
          p "You want to be calm"
          audio_features.valence > 0.4 && audio_features.tempo < 100
        elsif form_feeling == "happy"
          p "You want to be happy"
          audio_features.valence > 0.6
        end
      end

---

##Simpler example

class Track
  attr_reader :name, :valence, :match_sentiment 
  
  def initialize(attributes)
    @name = attributes[:name]
    @valence = attributes[:valence]
  end
  
end#for class Track 

  def Track.class.match_sentiment(form_feeling)
    if form_feeling == "sad"
      valence < 0.4
    elsif form_feeling == "happy"
      valence > 0.6
    end
  end

t = Track.new({name:"happy", valence:0.7})
b = Track.new({name:"sad", valence:0.2})

tracks = [t,b]

#Get only sad tracks 
form_feeling = "sad"
tracks.select{|t| t.match_sentiment(form_feeling)}


#Get only happy tracks 
form_feeling = "happy"
tracks.select{|t| t.match_sentiment(form_feeling)}