Add project files.

Lantean.QBTMudBlade/Models/ContentItem.cs

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+namespace Lantean.QBTMudBlade.Models
+{
+    public class ContentItem
+    {
+        public ContentItem(
+            string name,
+            string displayName,
+            int index,
+            Priority priority,
+            float progress,
+            long size,
+            float availability,
+            bool isFolder = false,
+            int level = 0)
+        {
+            Name = name;
+            DisplayName = displayName;
+            Index = index;
+            Priority = priority;
+            Progress = progress;
+            Size = size;
+            Availability = availability;
+            IsFolder = isFolder;
+            Level = level;
+        }
+
+        public string Name { get; }
+
+        public string Path => IsFolder ? Name : Name.GetDirectoryPath();
+
+        public string DisplayName { get; }
+
+        public int Index { get; }
+
+        public Priority Priority { get; set; }
+
+        public float Progress { get; set; }
+
+        public long Size { get; set; }
+
+        public float Availability { get; set; }
+
+        public long Downloaded => (long)Math.Round(Size * Progress, 0);
+
+        public long Remaining => Size - Downloaded;
+
+        public bool IsFolder { get; }
+
+        public int Level { get; }
+
+        public override bool Equals(object? obj)
+        {
+            if (obj is null) return false;
+            return ((ContentItem)obj).Name == Name;
+        }
+
+        public override int GetHashCode()
+        {
+            return Name.GetHashCode();
+        }
+    }
+}