Add support for new libspotify v12 session callbacks (closes #113)

hallon.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version = '>= 1.9'
 
   gem.add_dependency 'ref', '~> 1.0'
-  gem.add_dependency 'spotify', '~> 11.0.2'
+  gem.add_dependency 'spotify', '~> 12.0.0'
   gem.add_development_dependency 'rake', '~> 0.8'
   gem.add_development_dependency 'rspec', '~> 2'
   gem.add_development_dependency 'yard'

lib/hallon/observable/session.rb

@@ -249,5 +249,39 @@ def offline_error_callback(pointer, error)
     def credentials_blob_updated_callback(pointer, credentials)
       trigger(pointer, :credentials_blob_updated, credentials)
     end
+
+    # @example listening to this event
+    #   session.on(:connectionstate_updated) do
+    #     puts "Yay! Connection state changed… hooray… wee… no?"
+    #   end
+    #
+    # @yield
+    def connectionstate_updated_callback(pointer)
+      trigger(pointer, :connectionstate_updated)
+    end
+
+    # @example listening to this event
+    #   session.on(:scrobble_error) do |error|
+    #     Hallon::Error.maybe_raise(error)
+    #   end
+    #
+    # @yield
+    def scrobble_error_callback(pointer, error)
+      trigger(pointer, :scrobble_error, error)
+    end
+
+    # @example listening to this event
+    #   session.on(:private_session_mode_changed) do |enabled|
+    #     if enabled
+    #       puts "Private session enabled!"
+    #     else
+    #       puts "Private session disabled!"
+    #     end
+    #   end
+    #
+    # @yield
+    def private_session_mode_changed_callback(pointer, enabled)
+      trigger(pointer, :private_session_mode_changed, enabled)
+    end
   end
 end

spec/hallon/hallon_spec.rb

@@ -5,7 +5,7 @@
   end
 
   describe "API_VERSION" do
-    specify { Hallon::API_VERSION.should == 11 }
+    specify { Hallon::API_VERSION.should == 12 }
   end
 
   describe "API_BUILD" do

spec/hallon/observable/session_spec.rb

@@ -144,4 +144,24 @@
     let(:input)  { [a_pointer, :ok] }
     let(:output) { [:ok] }
   end
+
+  specification_for_callback "credentials_blob_updated" do
+    let(:input) { [a_pointer, "credentials"] }
+    let(:output) { ["credentials"] }
+  end
+
+  specification_for_callback "connectionstate_updated" do
+    let(:input) { [a_pointer] }
+    let(:output) { [] }
+  end
+
+  specification_for_callback "scrobble_error" do
+    let(:input) { [a_pointer, :ok] }
+    let(:output) { [:ok] }
+  end
+
+  specification_for_callback "private_session_mode_changed" do
+    let(:input) { [a_pointer, true] }
+    let(:output) { [true] }
+  end
 end