restrict /now command on groups (#44)

* restrict `/now` command on groups

Author: rodrigondec

bot/commands/subject.py

@@ -5,6 +5,7 @@
 from mongoengine.errors import DoesNotExist, MultipleObjectsReturned
 
 from bot.core import BotTelegramCore
+from bot.messages import NOW_GROUP_RESTRICTED
 from db.subject import Subject
 from db.observer import UserObserver
 from db.update_message import UpdateMessage
@@ -21,6 +22,14 @@ def now(update: Update, context: CallbackContext):
     chat = update.effective_chat
     message = update.effective_message
 
+    if not chat.type == "private":
+        available_vsps = "\n".join([subject.header for
+                                    subject in Subject.objects.all()])
+        message.reply_text(NOW_GROUP_RESTRICTED, parse_mode='MARKDOWN')
+        message.reply_text(f"<b>Available VSP's are:</b>\n\n{available_vsps}",
+                           parse_mode='HTML')
+        return
+
     try:
         observer = UserObserver.objects.get(chat_id=f"{chat.id}")
     except DoesNotExist:

bot/messages.py

@@ -5,3 +5,5 @@
        "https://github.com/dcr-guys/JackBot/"
 
 ADMIN_RESTRICTED = "This command is restricted to admins only!"
+
+NOW_GROUP_RESTRICTED = "The command `/now` without args is restricted on groups! Please call `/now` with args"