Built-in Last.fm TOP playlists

app/controllers/application_controller.rb

@@ -23,6 +23,10 @@ class ApplicationController < ActionController::Base
     render partial: 'stat'
   end
   
+  def cache_for time
+    response.headers['Cache-Control'] = 'public, max-age=' + time.seconds.to_s
+  end
+  
 protected
   
   def authorize

app/controllers/artist_controller.rb

@@ -32,7 +32,6 @@ class ArtistController < ApplicationController
       return render json: { status: 'fail', html: render_compact_partial(:fail) }
     end
     
-    # response.headers['Cache-Control'] = 'public, max-age='+1.week.seconds.to_s
     render json: {
       status: @artist.status_str,
       artist: @artist,

app/controllers/last_fm_controller.rb

@@ -80,7 +80,7 @@ class LastFmController < ApplicationController
   end
   
   def self.top_playlist artist
-    playlist = Playlist.create(name: "#{artist.name}: Last.fm TOP")
+    playlist = Playlist.create(name: "#{artist.name}: Last.fm TOP", artist: artist)
     LastFM::Artist.get_top_tracks(artist: artist.name)["toptracks"]["track"].each do |track|
       tracks = Track.joins(:album, :artists).where(name: track["name"], "track_artists.artist_id" => artist.id)
       PlaylistItem.create(playlist_id: playlist.id, track_id: tracks.first.id) unless tracks.empty?

app/controllers/playlist_controller.rb

@@ -3,4 +3,18 @@ class PlaylistController < ApplicationController
     @playlist = Playlist.find_by_id(params[:id])
     render json: @playlist, include: { playlist_items: { include: { track: { include: { artists: {} }}}}}
   end
+  
+  def lastfm_top50
+    artist = Artist.find_by_id(params[:id])
+    return if artist.nil?
+    
+    playlist = Playlist.new(name: "#{artist.name}: Last.fm TOP 50", artist: artist)
+    LastFM::Artist.get_top_tracks(artist: artist.name)["toptracks"]["track"].each do |track|
+      tracks = Track.joins(:album, :artists).where(name: track["name"], "track_artists.artist_id" => artist.id)
+      playlist.playlist_items << PlaylistItem.new(track_id: tracks.first.id) unless tracks.empty?
+    end
+    
+    cache_for 1.week
+    render json: playlist, include: { playlist_items: { include: { track: { include: { artists: {} }}}}}
+  end
 end