oldhaven/app/controllers/artist_controller.rb

require 'uri'
require 'open-uri'

class ArtistController < ApplicationController
  def data
    data = {}
    name = params[:name].gsub('%20', ' ').gsub('+', ' ')
    artist = Artist.find_by_name(name)
    unless artist
      mb_artist = MusicBrainzArtist.getByName(name)
      if mb_artist
        ImportController.importArtist(name)
        render :json => {error:'loading'}
        return
      else
        render :json => {error:404}
        return
      end
    end
    data['artist'] = {name: artist.name, desc: ActionController::Base.helpers.strip_tags(artist.desc), pic: artist.pic_url}
    data['albums'] = []
    albums = artist.albums
    albums.each do |album|
      tmp_album = {name: album.name, year: album.year, pic: album.pic_url}
      album_tracks = []
      bonus_tracks = []
      album.tracks.each do |track|
        tmp_track = {name: track.name, live: track.live, acoustic: track.acoustic}
        if track.length
          time = (track.length / 1000).round
          time_m = (time / 60).floor
          time_s = time - time_m * 60
          tmp_track['duration'] = time_m.to_s + ':' + (time_s < 10 ? '0' : '') + time_s.to_s
        else
          tmp_track['duration'] = '0:00'
        end
        (track.bonus == 0 ? album_tracks : bonus_tracks) << tmp_track
      end
      tmp_album['tracks'] = {album: album_tracks, bonus: bonus_tracks}
      data['albums'] << tmp_album
    end
    render :json => data
  end
  
  def autocomplete
  	autocomplete = ArtistController.getLastFmAutocomplete(params[:query])
  	return	render :nothing => true if autocomplete.nil?
  	suggestions = []
    autocomplete["response"]["docs"].each do |doc|
    	suggestions << doc["artist"] unless suggestions.include?(doc["artist"]) or doc["artist"].nil?
    end
		render :json => {
			:query => params[:query],
			:suggestions => suggestions
		}
	end
	
	def self.getLastFmAutocomplete(query)
  	return nil if query.nil? or query.strip.empty?
		json = ActiveSupport::JSON.decode(open(
		  'http://www.last.fm/search/autocomplete' <<
		  '?q=' << URI.escape(query)
    ).read)
    return json.empty? ? nil : json
	end
end