Hooked up view with play button

Set up data structures for holding and playing music

Aurora/Aurora.csproj

@@ -33,6 +33,7 @@
     <Folder Include="Backend\Utils\" />
     <Folder Include="Backend\Models\" />
     <Folder Include="Backend\Services\" />
+    <Folder Include="Backend\Services\PlayerService\" />
   </ItemGroup>
   <ItemGroup>
     <Compile Update="Frontend\Components\MusicPlayer\Player.xaml.cs">

Aurora/Backend/Models/BaseSong.cs

@@ -1,10 +1,16 @@
 using System;
+using System.IO;
+
 namespace Aurora.Backend.Models
 {
     public abstract class BaseSong
     {
+        private bool _loaded;
+        private Stream _stream;
+
         public BaseSong()
         {
+            _loaded = false;
             Id = Guid.NewGuid().ToString();
         }
 
@@ -41,16 +47,41 @@ namespace Aurora.Backend.Models
         /// <value></value>
         public object Metadata { get; set; }
 
-
         #endregion Properties
 
-        #region Methods
+        public virtual void Load()
-        /// <summary>
+        {
-        /// Play this instance.
+            _loaded = true;
-        /// </summary>
+        }
-        public abstract void Play();
+
+        public virtual void Unload()
+        {
+            _loaded = false;
+        }
+
+        /// <summary>
+        /// Gets or sets the data stream that holds the song.
+        /// </summary>
+        /// <value>The data stream.</value>
+        public Stream DataStream
+        {
+            get
+            {
+                //if (!_loaded)
+                //{
+                //    throw new InvalidOperationException("Must be loaded first");
+                //}
+                return _stream;
+            }
+            protected set
+            {
+                if (value != _stream)
+                {
+                    _stream = value;
+                }
+            }
+        }
 
-        #endregion
     }
 
 }

Aurora/Backend/Models/LocalSong.cs

@@ -15,12 +15,25 @@ namespace Aurora.Backend.Models
 
         #endregion Properties
 
-        #region Methods
+        public override void Load()
-        public override void Play()
         {
-            throw new NotImplementedException();
+            if (this.DataStream != null)
+            {
+                DataStream.Close();
+                DataStream = null;
+            }
+            this.DataStream = System.IO.File.OpenRead(File.FullName);
+            base.Load();
         }
 
-        #endregion Methods
+        public override void Unload()
+        {
+            if (this.DataStream != null)
+            {
+                DataStream.Close();
+                DataStream = null;
+            }
+            base.Unload();
+        }
     }
 }

Aurora/Frontend/Views/BaseViewModel.cs

@@ -4,13 +4,23 @@ using System.Runtime.CompilerServices;
 
 namespace Aurora.Frontend.Views
 {
-    public class BaseViewModel
+    public class BaseViewModel : INotifyPropertyChanged
     {
         public BaseViewModel()
         {
         }
 
         #region INotifyPropertyChanged Implementation
+        public bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
+        {
+            if (Object.Equals(storage, value))
+                return false;
+
+            storage = value;
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+
         public event PropertyChangedEventHandler PropertyChanged;
         public void OnPropertyChanged([CallerMemberName] string propertyName = "")
         {

Aurora/Frontend/Views/Songs/SongsView.xaml

@@ -1,11 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:songs="clr-namespace:Aurora.Frontend.Views.Songs"
              xmlns:dg="clr-namespace:Xamarin.Forms.DataGrid;assembly=Xamarin.Forms.DataGrid"
              x:Class="Aurora.Frontend.Views.Songs.SongsView">
+    <ContentPage.BindingContext>
+        <songs:SongsViewModel x:Name="songsViewModel"/>
+    </ContentPage.BindingContext>
+    
     <ContentPage.Content>
         <dg:DataGrid ItemsSource="{Binding SongsList}" SelectionEnabled="True" SelectedItem="{Binding SelectedSong}"
-               RowHeight="30" HeaderHeight="50" BorderColor="#CCCCCC" HeaderBackground="#E0E6F8">
+               RowHeight="30" HeaderHeight="50" BorderColor="#CCCCCC" HeaderBackground="#E0E6F8" >
             
             <!-- Header -->
             <dg:DataGrid.HeaderFontSize>
@@ -18,7 +23,14 @@
 
             <!-- Columns -->
             <dg:DataGrid.Columns>
-                <dg:DataGridColumn Title="Title" PropertyName="Title" Width="2*"/>
+                <dg:DataGridColumn Title="" Width="40">
+                    <dg:DataGridColumn.CellTemplate>
+                        <DataTemplate>
+                            <Button Text="Play" Command="{Binding PlayCommand}" BindingContext="{x:Reference songsViewModel}" />
+                        </DataTemplate>
+                    </dg:DataGridColumn.CellTemplate>
+                </dg:DataGridColumn>
+                <dg:DataGridColumn Title="Title" PropertyName="Title" Width="2*" />
                 <dg:DataGridColumn Title="Album" PropertyName="Album" Width="0.95*"/>
                 <dg:DataGridColumn Title="Artist" PropertyName="Artist"  Width="1*"/>
                 <dg:DataGridColumn Title="Duration" PropertyName="Duration"/>

Aurora/Frontend/Views/Songs/SongsView.xaml.cs

@@ -10,7 +10,6 @@ namespace Aurora.Frontend.Views.Songs
         public SongsView()
         {
             InitializeComponent();
-            BindingContext = new SongsViewModel();
         }
     }
 }

Aurora/Frontend/Views/Songs/SongsViewModel.cs

@@ -1,6 +1,8 @@
 using System.Collections.ObjectModel;
 using Aurora.Backend.Models;
 using Aurora.Backend.Services;
+using Aurora.Backend.Services.PlayerService;
+using Xamarin.Forms;
 
 namespace Aurora.Frontend.Views.Songs
 {
@@ -16,6 +18,7 @@ namespace Aurora.Frontend.Views.Songs
         public SongsViewModel()
         {
             _songsList = new ObservableCollection<BaseSong>();
+            PlayCommand = new Command(PlayExecute);
             Initialize();
         }
 
@@ -25,29 +28,17 @@ namespace Aurora.Frontend.Views.Songs
         public ObservableCollection<BaseSong> SongsList
         {
             get { return _songsList; }
-            set
+            set { SetProperty(ref _songsList, value); }
-            {
-                if (value != _songsList)
-                {
-                    _songsList = value;
-                    OnPropertyChanged("SongList");
-                }
-            }
         }
 
         public BaseSong SelectedSong
         {
             get { return _selectedSong; }
-            set
+            set { SetProperty(ref _selectedSong, value); }
-            {
-                if (value != _selectedSong)
-                {
-                    _selectedSong = value;
-                    OnPropertyChanged("SelectedSong");
-                }
-            }
         }
 
+        public Command PlayCommand { get; private set; }
+
         #endregion Properties
 
         #region Methods