Add Airfoil and Speaker models for upcoming Airfoil integration.

These additions cover most of the Airfoil functionality that we will be
using. There is some functionality that has yet to be implemented,
however as the API end is built out any lacking functionality will be
realized and implemented.

app/boot.rb

@@ -24,6 +24,8 @@
 require 'models/queue'
 require 'models/song'
 require 'models/user'
+require 'models/speaker'
+require 'models/airfoil'
 
 require 'app'
 require 'views/layout'

app/models/airfoil.rb

@@ -0,0 +1,48 @@
+module Play
+  class Airfoil
+
+    # Get appscript handle for airfoil.
+    #
+    # Returns an Appscript instance of the airfoil app.
+    def self.app
+      Appscript.app('Airfoil')
+    end
+
+    # Check if Airfoil is installed.
+    #
+    # Returns Boolean.
+    def self.installed?
+      Dir.exists?('/Applications/Airfoil.app')
+    end
+
+    # Get all the connected speakers.
+    #
+    # This can't be named simply speakers because Airfoil
+    # has a speakers method.
+    #
+    # Returns Array of Speakers.
+    def self.get_speakers
+      app.speakers.id_.get.map { |id|
+        Speaker.new id
+      }
+    end
+
+    # Get volume for all speakers.
+    #
+    # Returns Array of Floats speaker volumefrom 0.0 to 1.0.
+    def self.speakers_volume
+      app.speakers.volume.get
+    end
+
+    # Set the volume for all speakers.
+    #
+    # setting - Float 0.0 to 1.0 volume level.
+    #
+    # Returns Float volume level.
+    def self.speakers_volume=(setting)
+      app.speakers.volume.set setting
+      speakers_volume
+    end
+
+  end
+end

app/models/speaker.rb

@@ -0,0 +1,83 @@
+module Play
+  class Speaker
+
+    # The Airfoil ID for the speaker.
+    attr_reader :id
+
+    # Initialize a new speaker.
+    #
+    # id - Airfoil id of the speaker.
+    #
+    # Returns new Speaker.
+    def initialize(id)
+      @id = id
+    end
+
+    # Get appscript handle for airfoil.
+    #
+    # Returns Airfoil appscript handle.
+    def app
+      Airfoil.app
+    end
+
+    # Get the speaker name.
+    #
+    # Returns String speaker name.
+    def name
+      app.speakers.ID(@id).name.get
+    end
+
+    # Check if the speaker is connected to an audio source.
+    #
+    # Returns boolean.
+    def connected?
+      app.speakers.ID(@id).connected.get
+    end
+
+    # Connect the speaker to the audio source.
+    #
+    # Returns Boolean connected?
+    def connect!
+      app.speakers.ID(@id).connect_to
+      connected?
+    end
+
+    # Disconnect the speaker from audio source.
+    #
+    # Returns Boolean connected?
+    def disconnect!
+      app.speakers.ID(@id).disconnect_from
+      connected?
+    end
+
+    # Get volume for a specific speaker.
+    #
+    # Returns Float volume level from 0.0 to 1.0.
+    def volume
+      app.speakers.ID(@id).volume.get
+    end
+
+    # Set the volume for a specific speaker.
+    #
+    # setting - Float 0.0 to 1.0 volume level.
+    #
+    # Returns Float new volume level.
+    def volume=(setting)
+      app.speakers.ID(@id).volume.set setting
+      volume
+    end
+
+    # The hashed representation of a Speaker.
+    #
+    # Returns a Hash.
+    def to_hash
+      {
+        :id => @id,
+        :name => name,
+        :connected => connected?,
+        :volume => volume
+      }
+    end
+
+  end
+end

test/airfoil_test.rb

@@ -0,0 +1,42 @@
+require File.expand_path("../helper", __FILE__)
+
+if !Airfoil.installed?
+	puts "\nAirfoil is not installed, skipping Airfoil tests."
+	puts "You can get Airfoil from http://rogueamoeba.com/airfoil/\n\n"
+end
+
+context "Airfoil" do
+
+  setup do
+  	Airfoil.app.get
+    @speaker = Speaker.new "com.rogueamoeba.airfoil.LocalSpeaker"
+  end
+
+  test "Get speakers" do
+  	speakers = Airfoil.get_speakers
+  	assert speakers.length > 0
+  	assert_equal @speaker.id, speakers[0].id
+  	assert_equal @speaker.name, speakers[0].name
+    assert_equal @speaker.connected?, speakers[0].connected?
+  	assert_equal @speaker.volume, speakers[0].volume
+  end
+
+  test "All speaker volumes getting and setting" do
+  	speakers = Airfoil.get_speakers
+  	Airfoil.speakers_volume = 0
+  	speakers.each do |speaker|
+  		assert_equal 0, speaker.volume
+  	end
+
+  	Airfoil.speakers_volume = 1
+  	speakers.each do |speaker|
+  		assert_equal 1, speaker.volume
+  	end
+
+   	Airfoil.speakers_volume = 0
+  	speakers.each do |speaker|
+  		assert_equal 0, speaker.volume
+  	end
+  end
+
+end if Airfoil.installed? and ENV['CI'] != '1'

test/speaker_test.rb

@@ -0,0 +1,50 @@
+require File.expand_path("../helper", __FILE__)
+
+if !Airfoil.installed?
+	puts "\nAirfoil is not installed, skipping Speaker tests."
+	puts "You can get Airfoil from http://rogueamoeba.com/airfoil/\n\n"
+end
+
+context "Speaker" do
+
+  setup do
+  	Airfoil.app.get
+    @speaker = Speaker.new "com.rogueamoeba.airfoil.LocalSpeaker"
+  end
+
+  test "speaker id is set" do
+    assert_equal "com.rogueamoeba.airfoil.LocalSpeaker", @speaker.id
+  end
+
+  test "get speaker name" do
+    assert_equal "Computer", @speaker.name
+  end
+
+  test "Speaker volume setting and getting" do
+    @speaker.volume = 0
+    assert_equal 0, @speaker.volume
+
+    @speaker.volume = 1
+    assert_equal 1, @speaker.volume
+  end
+
+  test "speaker connect, disconnect and connected status" do
+    @speaker.disconnect!
+    assert_equal false, @speaker.connected?
+
+    @speaker.connect!
+    assert @speaker.connected?
+
+    @speaker.disconnect!
+    assert_equal false, @speaker.connected?
+  end
+
+  test "speaker to hash" do
+    speaker = @speaker.to_hash
+    assert_equal @speaker.id, speaker[:id]
+    assert_equal @speaker.name, speaker[:name]
+    assert_equal @speaker.connected?, speaker[:connected]
+    assert_equal @speaker.volume, speaker[:volume]
+  end
+
+end if Airfoil.installed? and ENV['CI'] != '1'