Safe attributes, api limits support

lib/robbie.rb

@@ -36,5 +36,9 @@ module Robbie
     def cache_enabled?
       @@cache_enabled
     end
+
+    def free_limits?
+      true
+    end
   end
 end

lib/robbie/models/album.rb

@@ -13,7 +13,7 @@ module Robbie
     end
 
     def tracks
-      @tracks ||= Parsers::Album.find(id).tracks
+      @tracks ||= Parsers::Album.find(id).tracks || []
     end
   end
 end

lib/robbie/models/artist.rb

@@ -17,7 +17,7 @@ module Robbie
     end
 
     def albums
-      @albums ||= Parsers::Artist.find(id).albums
+      @albums ||= Parsers::Artist.find(id).albums || []
     end
   end
 end

lib/robbie/models/track.rb

@@ -7,5 +7,9 @@ module Robbie
         Parsers::Track.find(id)
       end
     end
+
+    def artists
+      @artists || []
+    end
   end
 end

lib/robbie/parsers/album.rb

@@ -36,8 +36,10 @@ module Robbie
           params = {}
           params[:id] = data["ids"]["albumId"] if data["ids"]
           params[:title] = data["title"]
-          if data["album"] && data["originalReleaseDate"].is_a?(String)
+          if data["originalReleaseDate"].is_a?(String)
             params[:year] = data["originalReleaseDate"].split("-").first
+          elsif data["year"].is_a?(String)
+            params[:year] = data["year"].split("-").first
           end
 
           Robbie::Album.new(params)

lib/robbie/parsers/base_parser.rb

@@ -4,6 +4,7 @@ module Robbie
       include HTTParty
       base_uri "api.rovicorp.com"
       format :json
+      @@calls = []
 
       class << self
         def sig
@@ -25,16 +26,28 @@ module Robbie
             if File.exist?(cache_file)
               MultiJson.load(File.open(cache_file).read)
             else
-              data = get("#{path}?#{params_str}")
+              data = load("#{path}?#{params_str}")
               File.open(cache_file, "w") do |file|
                 file.write(MultiJson.dump(data)) unless data.nil? or data.empty?
               end
               data
             end
           else
-            get("#{path}?#{params_str}")
+            load("#{path}?#{params_str}")
           end
         end
+
+        def load(uri)
+          if Robbie.free_limits?
+            @@calls = @@calls.length > 5 ? @@calls.slice(-5, 5) : @@calls
+            if @@calls.length > 5 && Time.now.to_f - @@calls.first <= 1.0
+              sleep(1.05 - (Time.now.to_f - @@calls.first))
+            end
+            @@calls << Time.now.to_f
+          end
+
+          get(uri)
+        end
       end
     end
   end