member removed fixed

bots/messaging_extension_action_preview_bot.py

@@ -5,16 +5,14 @@ import sys
 import time
 import uuid
 from asyncio import Future
-from datetime import datetime
-from typing import Optional, Dict, Union, List
-from urllib.parse import urlparse, parse_qsl, urlencode, unquote
+from typing import Optional
+from urllib.parse import urlparse, parse_qsl, urlencode
 
 import aiohttp
 from aiohttp.web_app import Application
 from botbuilder.core import (TurnContext, CardFactory, BotFrameworkAdapter,
-                             BotFrameworkAdapterSettings, MessageFactory)
-from botbuilder.schema import Activity, ActivityTypes, ResourceResponse, \
-    AttachmentLayoutTypes
+                             BotFrameworkAdapterSettings)
+from botbuilder.schema import Activity, ActivityTypes, ResourceResponse
 from botbuilder.schema.teams import (TaskModuleContinueResponse,
                                      TaskModuleTaskInfo, TaskModuleResponse,
                                      TaskModuleRequest)
@@ -235,17 +233,21 @@ class TeamsMessagingExtensionsActionPreviewBot(TeamsActivityHandler):
         i18n = get_i18n(turn_context)
         await self.cosmos_client.create_conversation_reference(turn_context)
         if turn_context.activity.channel_id == Channels.ms_teams:
+            if turn_context.activity.members_removed:
+                # members were removed!
+                pass
+            if turn_context.activity.members_added:
                 members = []
                 for member in turn_context.activity.members_added:
                     if member.id != turn_context.activity.recipient.id:
                         members.append(member)
                 if len(members) == 1 and turn_context.activity.members_added:
                     member = members[0]
-                name = member.name or ''
+                    name = member.name or member.id
                     bot_name = AppConfig.BOT_NAME
                     cmd_help = i18n.t("cmd_help")
-                greetings = i18n.t("hi_message", name=name, bot_name=bot_name,
-                                   cmd_help=cmd_help)
+                    greetings = i18n.t("hi_message", name=name,
+                                       bot_name=bot_name, cmd_help=cmd_help)
                     await turn_context.send_activity(greetings)
                     return
                 if len(members) > 1 and turn_context.activity.members_added: