- adding Delete Options for Both sides to AutoCleanForm

- general Performance improvements
- Adding MessageReceived Event to DeviceSession, will be called before "message loop"
- AutoCleanForm optimized and clean process added to public function MessageCleanup (so you could call on your own)
- IsGroup for DeviceSession fixed to correct test
- IsChannel added to DeviceSession

Examples:
- SimpleForm (#1) derived now from AutoCleanForm to show deletion mode for both sides

TelegramBaseTest/Tests/SimpleForm.cs

@@ -8,12 +8,18 @@ using TelegramBotBase.Form;
 
 namespace TelegramBaseTest.Tests
 {
-    public class SimpleForm : FormBase
+    public class SimpleForm : AutoCleanForm
     {
 
+        public SimpleForm()
+        {
+            this.DeleteSide = eSide.Both;
+            this.DeleteMode = eDeleteMode.OnLeavingForm;
+        }
+
         public override async Task Opened()
         {
-            await this.Device.Send("Hello world! (send 'back' to get back to Start)");
+            await this.Device.Send("Hello world! (send 'back' to get back to Start)\r\nOr\r\nhi, hello, maybe, bye and ciao");
         }
 
 

TelegramBaseTest/Tests/TestForm.cs

@@ -15,10 +15,6 @@ namespace TelegramBaseTest.Tests
 
         String LastMessage { get; set; }
 
-        public override async Task Init(params object[] param)
-        {
-            
-        }
 
         public override async Task Opened()
         {
@@ -30,12 +26,6 @@ namespace TelegramBaseTest.Tests
             await this.Device.Send("Ciao from Form 1");
         }
 
-        public override async Task Load(MessageResult message)
-        {
-
-
-        }
-
 
         public override async Task Action(MessageResult message)
         {

TelegramBaseTest/Tests/TestForm2.cs

@@ -15,10 +15,6 @@ namespace TelegramBaseTest.Tests
     public class TestForm2 : FormBase
     {
 
-        public override async Task Init(params object[] param)
-        {
-
-        }
 
         public override async Task Opened()
         {
@@ -30,10 +26,6 @@ namespace TelegramBaseTest.Tests
             await this.Device.Send("Ciao from Form 2");
         }
 
-        public override async Task Load(MessageResult message)
-        {
-
-        }
 
         public override async Task Action(MessageResult message)
         {

TelegramBotBase/Base/MessageReceivedEventArgs.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Telegram.Bot.Types;
+
+namespace TelegramBotBase.Base
+{
+    public class MessageReceivedEventArgs
+    {
+        public int MessageId
+        {
+            get
+            {
+                return this.Message.MessageId;
+            }
+        }
+
+        public Message Message { get; set; }
+
+        public MessageReceivedEventArgs(Message m)
+        {
+            this.Message = m;
+        }
+
+    }
+}

TelegramBotBase/Base/MessageResult.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using TelegramBotBase.Sessions;
 
 namespace TelegramBotBase.Base
 {
@@ -23,6 +24,9 @@ namespace TelegramBotBase.Base
             }
         }
 
+        public DeviceSession Device
+        { get; set; }
+
         /// <summary>
         /// The message id
         /// </summary>

TelegramBotBase/Base/MessageSentEventArgs.cs

@@ -9,18 +9,18 @@ namespace TelegramBotBase.Base
 {
     public class MessageSentEventArgs
     {
-        public int MessageId { get; set; }
+        public int MessageId
+        {
+            get
+            {
+                return this.Message.MessageId;
+            }
+        }
 
         public Message Message { get; set; }
 
-        public MessageSentEventArgs()
+        public MessageSentEventArgs(Message message)
         {
-
-        }
-
-        public MessageSentEventArgs(int MessageId, Message message)
-        {
-            this.MessageId = MessageId;
             this.Message = message;
         }
 

TelegramBotBase/BotBase.cs

@@ -201,12 +201,15 @@ namespace TelegramBotBase
 
             try
             {
+                DeviceSession ds = this.Sessions.GetSession(e.DeviceId);
+                e.Device = ds;
+
                 if (LogAllMessages)
                 {
-                    DeviceSession ds2 = this.Sessions.GetSession(e.DeviceId);
+                    OnMessage(new MessageIncomeResult(e.DeviceId, ds, e));
-                    OnMessage(new MessageIncomeResult(e.DeviceId, ds2, e));
                 }
 
+                ds?.OnMessageReceived(new MessageReceivedEventArgs(e.Message));
 
                 Client_TryMessage(sender, e);
             }
@@ -223,10 +226,11 @@ namespace TelegramBotBase
 
         private async void Client_TryMessage(object sender, MessageResult e)
         {
-            DeviceSession ds = this.Sessions.GetSession(e.DeviceId);
+            DeviceSession ds = e.Device;
             if (ds == null)
             {
                 ds = await this.Sessions.StartSession<T>(e.DeviceId);
+                e.Device = ds;
 
                 ds.LastMessage = e.Message;
 
@@ -286,10 +290,12 @@ namespace TelegramBotBase
         {
             try
             {
+                DeviceSession ds = this.Sessions.GetSession(e.DeviceId);
+                e.Device = ds;
+
                 if (LogAllMessages)
                 {
-                    DeviceSession ds2 = this.Sessions.GetSession(e.DeviceId);
+                    OnMessage(new MessageIncomeResult(e.DeviceId, ds, e));
-                    OnMessage(new MessageIncomeResult(e.DeviceId, ds2, e));
                 }
 
                 Client_TryAction(sender, e);
@@ -303,10 +309,11 @@ namespace TelegramBotBase
 
         private async void Client_TryAction(object sender, MessageResult e)
         {
-            DeviceSession ds = this.Sessions.GetSession(e.DeviceId);
+            DeviceSession ds = e.Device;
             if (ds == null)
             {
                 ds = await this.Sessions.StartSession<T>(e.DeviceId);
+                e.Device = ds;
             }
 
 

TelegramBotBase/Form/AutoCleanForm.cs

@@ -17,6 +17,8 @@ namespace TelegramBotBase.Form
 
         public eDeleteMode DeleteMode { get; set; }
 
+        public eSide DeleteSide { get; set; }
+
         public enum eDeleteMode
         {
             None = 0,
@@ -24,10 +26,18 @@ namespace TelegramBotBase.Form
             OnLeavingForm = 2
         }
 
+        public enum eSide
+        {
+            BotOnly = 0,
+            UserOnly = 1,
+            Both = 2
+        }
+
         public AutoCleanForm()
         {
             this.OldMessages = new List<Message>();
             this.DeleteMode = eDeleteMode.OnEveryCall;
+            this.DeleteSide = eSide.BotOnly;
 
         }
 
@@ -37,10 +47,24 @@ namespace TelegramBotBase.Form
                 return;
 
             this.Device.MessageSent += Device_MessageSent;
+
+            this.Device.MessageReceived += Device_MessageReceived;
+        }
+
+
+        private void Device_MessageReceived(object sender, MessageReceivedEventArgs e)
+        {
+            if (this.DeleteSide == eSide.BotOnly)
+                return;
+
+            this.OldMessages.Add(e.Message);
         }
 
         private void Device_MessageSent(object sender, MessageSentEventArgs e)
         {
+            if (this.DeleteSide == eSide.UserOnly)
+                return;
+
             this.OldMessages.Add(e.Message);
         }
 
@@ -49,19 +73,11 @@ namespace TelegramBotBase.Form
             if (this.DeleteMode != eDeleteMode.OnEveryCall)
                 return;
 
-            while (this.OldMessages.Count > 0)
+            await MessageCleanup();
-            {
-                if (!await this.Device.DeleteMessage(this.OldMessages[0].MessageId))
-                {
-                    //Nachricht konnte nicht gelöscht werden, vermutlich existiert diese nicht mehr
-                    if (this.OldMessages.Count > 0)
-                        this.OldMessages.RemoveAt(0);
-                }
-            }
         }
 
         /// <summary>
-        /// Fügt eine Nachricht zu der Liste der löschenden hinzu.
+        /// Adds a message to this of removable ones
         /// </summary>
         /// <param name="Id"></param>
         public void AddMessage(Message m)
@@ -70,7 +86,7 @@ namespace TelegramBotBase.Form
         }
 
         /// <summary>
-        /// Behält die Nachricht mit der angegebenen Id.
+        /// Keeps the message by removing it from the list
         /// </summary>
         /// <param name="Id"></param>
         public void LeaveMessage(int Id)
@@ -83,7 +99,7 @@ namespace TelegramBotBase.Form
         }
 
         /// <summary>
-        /// Behält die zuletzt gesendete Nachricht.
+        /// Keeps the last sent message
         /// </summary>
         public void LeaveLastMessage()
         {
@@ -98,9 +114,24 @@ namespace TelegramBotBase.Form
             if (this.DeleteMode != eDeleteMode.OnLeavingForm)
                 return;
 
-            foreach (var m in this.OldMessages)
+            await MessageCleanup();
+        }
+
+
+        /// <summary>
+        /// Cleans up all remembered messages.
+        /// </summary>
+        /// <returns></returns>
+        public async Task MessageCleanup()
         {
-                await this.Device.DeleteMessage(m.MessageId);
+            while (this.OldMessages.Count > 0)
+            {
+                if (!await this.Device.DeleteMessage(this.OldMessages[0].MessageId))
+                {
+                    //Message can't be deleted cause it seems not to exist anymore
+                    if (this.OldMessages.Count > 0)
+                        this.OldMessages.RemoveAt(0);
+                }
             }
         }
     }

TelegramBotBase/Sessions/DeviceSession.cs

@@ -68,13 +68,25 @@ namespace TelegramBotBase.Sessions
         {
             get
             {
-                return this.LastMessage != null && this.LastMessage.Chat.Id != this.LastMessage.From.Id;
+                return this.LastMessage != null && (this.LastMessage.Chat.Type == ChatType.Group | this.LastMessage.Chat.Type == ChatType.Supergroup);
+            }
+        }
+
+        /// <summary>
+        /// Returns if the messages is posted within a channel.
+        /// </summary>
+        public bool IsChannel
+        {
+            get
+            {
+                return this.LastMessage != null && this.LastMessage.Chat.Type == ChatType.Channel;
             }
         }
 
         public EventHandlerList __Events = new EventHandlerList();
 
         private static object __evMessageSent = new object();
+        private static object __evMessageReceived = new object();
 
         public DeviceSession()
         {
@@ -151,7 +163,7 @@ namespace TelegramBotBase.Sessions
             {
                 m = await (this.Client.TelegramClient.SendTextMessageAsync(this.DeviceId, text, replyToMessageId: replyTo, replyMarkup: markup, disableNotification: disableNotification));
 
-                OnMessageSent(new MessageSentEventArgs(m.MessageId, m));
+                OnMessageSent(new MessageSentEventArgs( m));
             }
             catch (ApiRequestException ex)
             {
@@ -184,7 +196,7 @@ namespace TelegramBotBase.Sessions
             {
                 m = await (this.Client.TelegramClient.SendTextMessageAsync(this.DeviceId, text, replyToMessageId: replyTo, replyMarkup: markup, disableNotification: disableNotification));
 
-                OnMessageSent(new MessageSentEventArgs(m.MessageId, m));
+                OnMessageSent(new MessageSentEventArgs(m));
             }
             catch (ApiRequestException ex)
             {
@@ -223,7 +235,7 @@ namespace TelegramBotBase.Sessions
             {
                 m = await this.Client.TelegramClient.SendPhotoAsync(this.DeviceId, file, replyToMessageId: replyTo, replyMarkup: markup, disableNotification: disableNotification);
 
-                OnMessageSent(new MessageSentEventArgs(m.MessageId, m));
+                OnMessageSent(new MessageSentEventArgs(m));
             }
             catch (ApiRequestException ex)
             {
@@ -319,7 +331,7 @@ namespace TelegramBotBase.Sessions
 
             var m = await this.Client.TelegramClient.SendDocumentAsync(this.DeviceId, document, caption, replyMarkup: markup, disableNotification: disableNotification, replyToMessageId: replyTo);
             
-            OnMessageSent(new MessageSentEventArgs(m.MessageId, m));
+            OnMessageSent(new MessageSentEventArgs(m));
 
             return m;
         }
@@ -414,5 +426,25 @@ namespace TelegramBotBase.Sessions
             (this.__Events[__evMessageSent] as EventHandler<MessageSentEventArgs>)?.Invoke(this, e);
         }
 
+        /// <summary>
+        /// Eventhandler for received messages
+        /// </summary>
+        public event EventHandler<MessageReceivedEventArgs> MessageReceived
+        {
+            add
+            {
+                this.__Events.AddHandler(__evMessageReceived, value);
+            }
+            remove
+            {
+                this.__Events.RemoveHandler(__evMessageReceived, value);
+            }
+        }
+
+
+        public void OnMessageReceived(MessageReceivedEventArgs e)
+        {
+            (this.__Events[__evMessageReceived] as EventHandler<MessageReceivedEventArgs>)?.Invoke(this, e);
+        }
     }
 }