Merge branch 'wel_come' into 'master'

Wel_come bot message

See merge request churchofmonero/monerojobsbot!2

monerojobs.py

 #!/usr/bin/python3
 """ Module that displays first start bot message """
 import logging
-from telegram.ext import CommandHandler
-from telegram.ext import Updater
+from telegram import Update
+from telegram.ext import CommandHandler, Updater, MessageHandler, Filters
+from telegram.ext import CallbackContext
 
 updater = Updater(token='', use_context=True)
 dispatcher = updater.dispatcher
@@ -15,9 +16,29 @@ def start(update, context):
 
 start_handler = CommandHandler('start', start)
 dispatcher.add_handler(start_handler)
-updater.start_polling()
-
-update.stop()
 
-if __name__ == "__main__":
-    start()
+def user_joined(update: Update, context: CallbackContext):
+    """ Method that welcomes a user """
+​
+    # Get the username
+    user = update.effective_user.username
+​
+    # Check if the user has a username. If not,
+    # use the first name which is always there
+    if user:
+        user = "@" + user
+    else:
+        user = update.effective_user.first_name
+​
+    # Create a message that greets the user
+    msg = "Hey " + user + " welcome to Monero Service!"
+​
+    # Send that message to the group
+    context.bot.send_message(update.message.chat_id, msg)
+​
+# Create a MessageHandler that will only listen to message about joined users
+join = MessageHandler(Filters.status_update.new_chat_members, user_joined)
+​
+# Add the new handler to the dispatcher of the bot
+updater.dispatcher.add_handler(join)
+updater.start_polling()