Hubot Rap Genius script

hubot-rap-genius.coffee

# Description
#   Rap Genius client
#
# Author:
#   jtblin

rg = require "rapgenius-js"

module.exports = (robot) ->
  robot.respond /(rapgenius|rg) (artist|song|explain)? (.*)/i, (msg) ->
    type = msg.match[2].toLowerCase()
    name = msg.match[3]
    switch type
      when 'artist'
        rg.searchArtist name, (err, artist) ->
          msg.send "Rap artist found [name=#{artist.name}, link=#{artist.link}, popular-songs=#{artist.popularSongs.length}]"
      when 'song'
        rg.searchSong name, (err, songs) ->
          msg.send songs.length +  " songs found"
          if songs.length then msg.send "First one is #{songs[0].name}, artists: #{songs[0].artists}, url: #{songs[0].link}"
      when 'explain'
        explainMe msg, name
      else msg.send "Try again."

  robot.hear /(what is |can you )?(the meaning of|explain) (life|death|love)/i, (msg) ->
    if msg.match[3]
      name = msg.match[3]
    else
      name = msg.match[2]
    explainMe msg, name

explainMe = (msg, name) ->
  rg.searchSong name, (err, songs) ->
    if songs.length
      rg.searchLyricsAndExplanations songs[0].link, (err, data) ->
        if err then return msg.send "Something's gone awry"
        explanations = data.explanations
        keys = Object.keys(explanations)
        explanation = explanations[keys[Math.floor(Math.random() * (keys.length-1))]]
        msg.send explanation if explanation