Adding initial playback bar logic.

Harmonia.UI/Converters/ArtistsToStringConverter.cs

@@ -0,0 +1,32 @@
+using Avalonia.Data.Converters;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+
+namespace Harmonia.UI.Converters;
+
+public class ArtistsToStringConverter : IValueConverter
+{
+    public ArtistsToStringConverter()
+    {
+
+    }
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not List<string>)
+            return string.Empty;
+
+        List<string> artists = (List<string>)value;
+
+        if (artists == null)
+            return string.Empty;
+
+        return string.Join(" / ", artists);
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return new List<string>();
+    }
+}

Harmonia.UI/Converters/NullVisibilityConverter.cs

@@ -0,0 +1,29 @@
+using Avalonia.Data.Converters;
+using System;
+using System.Collections;
+using System.Globalization;
+
+namespace Harmonia.UI.Converters;
+
+public sealed class NullVisibilityConverter : IValueConverter
+{
+    public NullVisibilityConverter()
+    {
+
+    }
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is IList list)
+        {
+            return list.Count > 0;
+        }
+
+        return value is not null;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}

Harmonia.UI/Converters/SecondsToStringConverter.cs

@@ -0,0 +1,37 @@
+using Avalonia.Data.Converters;
+using System;
+using System.Globalization;
+
+namespace Harmonia.UI.Converters;
+
+public sealed class SecondsToStringConverter : IValueConverter
+{
+    public SecondsToStringConverter()
+    {
+
+    }
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not double doubleValue)
+            return null;
+
+        TimeSpan timeSpan = TimeSpan.FromSeconds(doubleValue);
+
+        if (timeSpan.Hours >= 1)
+            return timeSpan.ToString(@"%h\:mm\:ss");
+
+        return timeSpan.ToString(@"%m\:ss");
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value == null)
+            return null;
+
+        if (value is not string stringValue)
+            return null;
+
+        return TimeSpan.Parse(stringValue);
+    }
+}

Harmonia.UI/Converters/SongTitleConverter.cs

@@ -0,0 +1,27 @@
+using Avalonia.Data.Converters;
+using Harmonia.Core.Models;
+using System;
+using System.Globalization;
+
+namespace Harmonia.UI.Converters;
+
+public sealed class SongTitleConverter : IValueConverter
+{
+    public SongTitleConverter()
+    {
+
+    }
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not Song song)
+            return null;
+
+        return string.IsNullOrWhiteSpace(song.Title) ? song.ShortFileName : song.Title;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}