Parsing args now based on regex; implemented filter by line

Implementing new arguments is now much easier!
Also user can now filter by line

bot.py

@@ -1,5 +1,6 @@
 import logging
 import requests
+import re
 from telegram import InlineQueryResultArticle, InputTextMessageContent
 from telegram.ext import Updater, CommandHandler, InlineQueryHandler
 
@@ -13,28 +14,22 @@ logging.basicConfig(format='%(acstime)s - %(name)s - %(levelname)s - %(message)s
 
 
 class Query:
-    input = ""
     station_id = -1
     departure_count = 4
-    line_filter = -1
+    line = ''
     destination = ""
 
     def __init__(self, args):
-        last_index_string = len(args)
-        if args[-1].isdigit():
-            self.departure_count = int(args[-1])
-            last_index_string -= 1
-        request_tmp = ' '.join(args[0:last_index_string]).strip()
-        separator_index = request_tmp.find(" to ")
-        if separator_index != -1:
-            self.input = request_tmp[:separator_index - 1].strip()
-            self.destination = request_tmp[separator_index + 4:].strip()
-        else:
-            self.input = request_tmp.strip()
-        if args[0].isdigit():
-            self.station_id = args[0].strip()
-        else:
-            self.station_id = search_station(self.input)
+        request_tmp = ' '.join(args)
+        argument_names = re.findall(r' to | in | times ', request_tmp)
+        arguments = re.split(r' to | in | times ', request_tmp)
+        self.station_id = search_station(arguments[0])
+        if ' to ' in argument_names:
+            self.destination = arguments[argument_names.index(' to ')+1]
+        if ' in ' in argument_names:
+            self.line = arguments[argument_names.index(' in ')+1]
+        if ' times ' in argument_names:
+            self.departure_count = int(arguments[argument_names.index(' times ') + 1])
 
 
 def start(update):
@@ -65,6 +60,7 @@ def get_vvs_departures(update, context):
     for station in request.json():
         if station['direction'].casefold().find(query.destination) != -1 or station['direction'].find(
                 query.destination) != -1:
+            if query.line == '' or (query.line != -1 and station['number'] == query.line):
                 update.message.reply_text(
                     "Line " + station['number'] + " to \"" + station['direction'] + "\" at "
                     + station['departureTime']['hour'].zfill(2) + ':' + station['departureTime']['minute'].zfill(2)