Added Group backend CRUD

src/Models/GroupModel.cs

@@ -0,0 +1,42 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Berufsschule_HAM.Exceptions;
+
+namespace Berufsschule_HAM.Models;
+
+public class GroupModel
+{
+    public required string Cn { get; set; }
+    public string? GidNumber { get; set; }
+    public List<GroupPermission> Permissions { get; set; }
+    public GroupModel(Dictionary<string, string> ldapData)
+    {
+        Cn = ldapData.GetValueOrDefault("cn") ?? throw new GroupModelConfigurationException();
+        GidNumber = ldapData.GetValueOrDefault("gidNumber");
+        string? descriptionValue = ldapData.GetValueOrDefault("description");
+        if (descriptionValue is null)
+        {
+            Permissions = [];
+        }
+        else
+        {
+            Permissions = JsonSerializer.Deserialize<GroupPermissions>(descriptionValue)?.Permissions ?? [];
+        }
+    }
+}
+
+public class GroupPermissions
+{
+    public required List<GroupPermission> Permissions { get; set; }
+}
+
+[JsonConverter(typeof(JsonStringEnumConverter))]
+public enum GroupPermission
+{
+    None,
+    CanInventorize,
+    CanManageUsers,
+    CanManageLocations,
+    CanManageAssets,
+    CanManageGroups
+}