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inspiration/Ablera.Serdica.Authorization/GroupsUtilities.cs

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+using Ablera.Serdica.Authorization.Models;
+using Microsoft.Extensions.Options;
+using System.Linq;
+
+namespace Ablera.Serdica.Authorization;
+public class GroupsUtilities
+{
+    private readonly string[] KnownRoles;
+
+    public GroupsUtilities(IOptions<RolesConfig> rolesOptions)
+    {
+        RolesConfig value = rolesOptions.Value;
+        if (value == null)
+        {
+            KnownRoles = new string[0];
+            return;
+        }
+
+        KnownRoles = (from x in value.UserRoles.Concat(value.OperationsRoles).Concat(value.UnderwriterRoles).Concat(value.OrganizationAdminRoles)
+                .Concat(value.SuperUserRoles)
+                      select x.ToUpper()).ToArray();
+    }
+
+    public string[] GetGroupsByRole(string[] roles)
+    {
+        var source = KnownRoles.Intersect(roles);
+        if (!source.Any())
+        {
+            return new string[0];
+        }
+
+        return source.ToArray();
+    }
+}