Deleting messages update

- new constant for how much message deletions per second
- updating AutoCleanForm "Cleanup" process to use constant and using MessageDeleted eventhandler

TelegramBotBase/Constants/Telegram.cs

@@ -21,5 +21,7 @@ namespace TelegramBotBase.Constants
 
         public const int MaxReplyKeyboardCols = 12;
 
+        public const int MessageDeletionsPerSecond = 30;
+
     }
 }

TelegramBotBase/Form/AutoCleanForm.cs

@@ -33,13 +33,12 @@ namespace TelegramBotBase.Form
             this.DeleteMode = eDeleteMode.OnEveryCall;
             this.DeleteSide = eDeleteSide.BotOnly;
 
-            this.Init +=  AutoCleanForm_Init;
+            this.Init += AutoCleanForm_Init;
 
             this.Closed += AutoCleanForm_Closed;
 
         }
 
-
         private async Task AutoCleanForm_Init(object sender, InitEventArgs e)
         {
             if (this.Device == null)
@@ -128,16 +127,24 @@ namespace TelegramBotBase.Form
         /// <returns></returns>
         public async Task MessageCleanup()
         {
-            var tasks = new List<Task>();
+            while (this.OldMessages.Count > 0)
-
-            foreach (var msg in this.OldMessages)
             {
-                tasks.Add(this.Device.DeleteMessage(msg));
+                var tasks = new List<Task>();
+                var msgs = this.OldMessages.Take(Constants.Telegram.MessageDeletionsPerSecond);
+
+                foreach (var msg in msgs)
+                {
+                    tasks.Add(this.Device.DeleteMessage(msg));
+                }
+
+                await Task.WhenAll(tasks);
+
+                foreach(var m in msgs)
+                {
+                    Device.OnMessageDeleted(new MessageDeletedEventArgs(m));
+                    this.OldMessages.Remove(m);
+                }
             }            
-
-            await Task.WhenAll(tasks);
-
-            this.OldMessages.Clear();
         }
     }
 }