Do not parse sticker pack when removing from ban

Also added try-catch strategy when printing banned packs

modules/ChatManagement/Handler/BanStickerSet.Handler.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using BotFramework.Attributes;
 using BotFramework.Enums;
@@ -43,9 +44,9 @@ public partial class BanStickerSet
     }
 
     [ParametrizedCommand(InChat.Public, "stick_unban", CommandParseMode.Both)]
-    public async Task HandleUnBanSticker(StickerSet.Param stickerSet)
+    public async Task HandleUnBanSticker(string stickerSet)
     {
-        if (!await PreCommand(stickerSet))
+        if (!await PreCommand())
         {
             return;
         }
@@ -57,13 +58,16 @@ public partial class BanStickerSet
             return;
         }
 
-        var setName = stickerSet.Set.Name;
+        if (!list.Exists(e => e == stickerSet))
+        {
+            return;
+        }
 
-        list.Remove(setName);
+        list.Remove(stickerSet);
         option.SetValue(list);
         Db.AddOrUpdate(option);
 
-        await Reply(FormatStickerSetAction(stickerSet.Set, "разблокирован"));
+        await Reply(FormatStickerSetAction(stickerSet, "разблокирован"));
     }
 
     [Command(InChat.Public, "stick_banlist", CommandParseMode.Both)]
@@ -81,12 +85,20 @@ public partial class BanStickerSet
         {
             var htmlString = new HtmlString().Bold("Заблокированные наборы стикеров:").Br();
             for (var i = 0; i < list.Count; i++)
+            {
+                try
                 {
                     var stickerSet = await Bot.GetStickerSetAsync(list[i]);
                     htmlString.Text($"{i + 1}. ")
                         .Url("https://t.me/addstickers/" + stickerSet.Name, stickerSet.Title)
                         .Br();
                 }
+                catch (Exception)
+                {
+                    // Suppress error.
+                    // Maybe remove pack from ban, but this exception can be just a timeout or Internal Server Error.
+                }
+            }
 
             msg = htmlString.ToString();
         }

modules/ChatManagement/Handler/BanStickerSet.Utils.cs

@@ -1,4 +1,6 @@
-using System.Collections.Generic;
+#nullable enable
+
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using BotFramework.Utils;
 using Kruzya.TelegramBot.Core.Data;
@@ -30,9 +32,9 @@ public partial class BanStickerSet
         return await Db.UserValues.FindOrCreateOption(Chat.Id, "cmBannedStickers");
     }
 
-    public async Task<bool> PreCommand(ParamParser.StickerSet.Param stickerSetParam)
+    public async Task<bool> PreCommand(ParamParser.StickerSet.Param? stickerSetParam = null)
     {
-        if (!stickerSetParam.IsValid)
+        if (stickerSetParam != null && !stickerSetParam.IsValid)
         {
             await Reply("Неверный набор стикеров.");
             return false;
@@ -42,13 +44,17 @@ public partial class BanStickerSet
     }
 
     public string FormatStickerSetAction(StickerSet stickerSet, string action)
-    {
+        => FormatStickerSetAction(stickerSet.Name, stickerSet.Title, action);
-        return new HtmlString()
+
+    public string FormatStickerSetAction(string name, string action)
+        => FormatStickerSetAction(name, name, action);
+
+    public string FormatStickerSetAction(string name, string title, string action)
+        => new HtmlString()
             .Text("Набор стикеров ")
-            .Url($"https://t.me/addstickers/{stickerSet.Name}", stickerSet.Title)
+            .Url($"https://t.me/addstickers/{name}", title)
             .Text($" {action}.")
             .ToString();
-    }
 
     private async Task<bool> CanUseCommands()
     {