[cm] ability to ban user for an arbitrary period

modules/ChatManagement/Handler/Ban.cs

@@ -1,5 +1,6 @@
 #nullable enable
 
+using System;
 using System.Threading.Tasks;
 using BotFramework.Attributes;
 using BotFramework.Enums;
@@ -8,6 +9,8 @@ using Kruzya.TelegramBot.Core.Data;
 using Kruzya.TelegramBot.Core.Extensions;
 using Telegram.Bot;
 using Telegram.Bot.Types;
+using Telegram.Bot.Types.Enums;
+using West.TelegramBot.ChatManagement.ParamParser;
 
 namespace West.TelegramBot.ChatManagement.Handler;
 
@@ -15,18 +18,33 @@ public class Ban : CommonHandler
 {
     public Ban(CoreContext db) : base(db) {}
 
-    [Command("ban", CommandParseMode.Both)]
-    public async Task HandleBan()
+    [ParametrizedCommand("ban", CommandParseMode.Both)]
+    public async Task HandleBan(BanLength.Param banLengthParam)
     {
-        if (!await CanPunish()) return;
+        if (!await CanPunish())
+        {
+            return;
+        }
+        var now = DateTime.Now;
+        var banEnd = now.AddDays(banLengthParam.DayCount);
 
-        await BanMember(RepliedUser!);
+        var banEndMsg = (banEnd - now).Days > 366 ? "навсегда" : $"до {banEnd.ToUniversalTime()}";
+
+        await Bot.SendTextMessageAsync(
+            Chat.Id,
+            $"{From.ToHtml()} <code>заблокировал</code> {RepliedUser!.ToHtml()} <code>{banEndMsg}</code>",
+            disableNotification: true, parseMode: ParseMode.Html);
+
+        await BanMember(RepliedUser!.Id, banEnd);
     }
 
     [Command("unban", CommandParseMode.Both)]
     public async Task HandleUnban()
     {
-        if (!await CanPunish()) return;
+        if (!await CanPunish())
+        {
+            return;
+        }
 
         await Bot.RestrictChatMemberAsync(Chat.Id, RepliedUser!.Id,
             new ChatPermissions