Added Assets update CRUD element

src/Models/AssetsModel.cs

@@ -0,0 +1,46 @@
+namespace Berufsschule_HAM.Models;
+
+using System.Text.Json;
+using Berufsschule_HAM.Exceptions;
+
+public class AssetModel
+{
+    public required string Cn { get; set; }
+    public string? SerialNumber { get; set; }
+    public AssetDescription? Description { get; set; }
+    public string? Location { get; set; }
+    public string? Owner { get; set; }
+    public string? Name { get; set; }
+
+    public AssetModel(Dictionary<string, string> ldapData)
+    {
+        Cn = ldapData.GetValueOrDefault("cn") ?? throw new AssetModelConfigurationException();
+        SerialNumber = ldapData.GetValueOrDefault("serialNumber");
+        Location = ldapData.GetValueOrDefault("l");
+        Owner = ldapData.GetValueOrDefault("owner");
+        Name = ldapData.GetValueOrDefault("name");
+        string? descriptionValue = ldapData.GetValueOrDefault("description");
+        if (descriptionValue is null)
+        {
+            Description = new();
+        }
+        else
+        {
+            Description = JsonSerializer.Deserialize<AssetDescription>(descriptionValue) ?? new();
+        }
+    }
+}
+
+public class AssetDescription
+{
+    public string? Type { get; set; }
+    public AssetPurchase? Purchase { get; set; }
+}
+
+public class AssetPurchase
+{
+    public string? PurchaseDate { get; set; }
+    public string? PurchaseValue { get; set; }
+    public string? PurchasedAt { get; set; }
+    public string? PurchasedBy { get; set; }
+}