temp: broken push to laptop

PcgsInv/Models/CoinCollection.cs

@@ -0,0 +1,47 @@
+using ReactiveUI;
+using ReactiveUI.SourceGenerators;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Reactive.Linq;
+using DynamicData;
+using DynamicData.Binding;
+using PcgsApi;
+
+namespace PcgsInv.Models;
+
+/// <summary>
+///     Contains all information related to a collection of coins.
+/// </summary>
+public partial class CoinCollection : ReactiveObject {
+    /// <summary>
+    ///     The name of the collection.
+    /// </summary>
+    [Reactive] private string _name;
+
+    /// <summary>
+    ///     The collection of <see cref="PcgsCoin"/> objects.
+    /// </summary>
+    [Reactive] private ObservableCollection<PcgsCoin> _coins;
+
+    /// <summary>
+    ///     The total value of the collection.
+    /// </summary>
+    [ObservableAsProperty] private double _totalValue;
+
+    /// <summary>
+    /// Creates a new CoinCollection instance.
+    /// </summary>
+    public CoinCollection() {
+        Name = string.Empty;
+        Coins = [];
+
+        Coins.ToObservableChangeSet()
+            .AutoRefresh(x => x.TotalPrice)
+            .ToCollection()
+            .Select(coins => coins.Sum(c => c.TotalPrice))
+            .ToProperty(this, nameof(TotalValue), out _totalValueHelper);
+    }
+}