Tutorial for LinphoneSDK x UWP - C#

uwp/cs/06_GroupChat/Controls/MessageDisplay.xaml.cs

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+/*
+ * Copyright (c) 2010-2020 Belledonne Communications SARL.
+ *
+ * This file is part of Linphone TutorialCS.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using Linphone;
+using System;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+
+namespace _06_GroupChat.Controls
+{
+	public sealed partial class MessageDisplay : UserControl
+	{
+		private readonly ChatMessage ChatMessage;
+
+		public MessageDisplay(ChatMessage message)
+		{
+			this.InitializeComponent();
+			ChatMessage = message;
+			UpdateLayoutFromMessage();
+			UpdateLayoutFromContents();
+		}
+
+		private void MessageDisplay_Loaded(object sender, RoutedEventArgs e)
+		{
+			ChatMessage.Listener.OnMsgStateChanged += OnMessageStateChanged;
+		}
+
+		private void MessageDisplay_Unloaded(object sender, RoutedEventArgs e)
+		{
+			ChatMessage.Listener = null;
+		}
+
+		private void OnMessageStateChanged(ChatMessage message, ChatMessageState state)
+		{
+			MessageState.Text = "The message state is : " + state;
+
+			switch (state)
+			{
+				case ChatMessageState.FileTransferError:
+				case ChatMessageState.FileTransferDone:
+					UpdateLayoutFromContents();
+					return;
+			}
+		}
+
+		private void UpdateLayoutFromMessage()
+		{
+			// Here we keep only the informations kept at the ChatMessage level
+			MessageState.Text = "The message state is : " + ChatMessage.State;
+			ReceiveDate.Text = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(ChatMessage.Time).ToLocalTime().ToString("HH:mm");
+			SenderName.Text += ChatMessage.FromAddress.Username;
+
+			if (ChatMessage.IsOutgoing)
+			{
+				this.HorizontalAlignment = HorizontalAlignment.Right;
+			}
+			else
+			{
+				this.HorizontalAlignment = HorizontalAlignment.Left;
+			}
+		}
+
+		private void UpdateLayoutFromContents()
+		{
+			ContentsStack.Children.Clear();
+
+			// We iterate over the Contents list to display all the contents
+			// in a multipart message.
+			// This code is common for Basic and Flexisip ChatRoom so even if
+			// another SIP client don't respect the basic chat room rules and
+			// and send multipart we can display it.
+			foreach (Content content in ChatMessage.Contents)
+			{
+				AddContent(content);
+			}
+		}
+
+		private void AddContent(Content content)
+		{
+			// A Content object can himself be multipart
+			if (content.IsMultipart)
+			{
+				// So we make this method recursive
+				foreach (Content innerContent in content.Parts)
+				{
+					AddContent(innerContent);
+				}
+				return;
+			}
+
+			// And we create a content display for each content. You can watch the code
+			// in content ContentDisplay.xaml(.cs).
+			ContentDisplay contentDisplay = new ContentDisplay(content, ChatMessage);
+			ContentsStack.Children.Add(contentDisplay);
+		}
+	}
+}