Add nuke code with relevant checks.

bot.py

@@ -8,7 +8,27 @@ logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - \
 
 
 def nuke(bot, update):
-    pass
+    if not update.message:
+        return
+    m = update.message
+    if m.chat.type == "private":
+        text = "This bot does not work in PM."
+        bot.send_message(chat_id=m.chat_id, text=text)
+        return
+    if not m.reply_to_message:
+        text = "You need to reply to a message."
+        bot.send_message(chat_id=m.chat_id, text=text)
+    user = bot.get_chat_member(m.chat.id, m.from_user.id)
+    if not user.can_delete_messages and user.status != "creator":
+        text = ('Only admins with "Delete Messages Permission" are allowed '
+                'to /nuke')
+        bot.send_message(chat_id=m.chat_id, text=text)
+        return
+    for i in range(m.reply_to_message.message_id, m.message_id + 1):
+        try:
+            bot.delete_message(m.chat_id, i)
+        except:
+            continue
 
 
 updater = Updater(token=config.api_key)