Now supports ambiguous stations.

When multiple stations are found, the user is presented with buttons to
chosse from. The arguments entered before will be preserved

bot.py

@@ -1,8 +1,8 @@
 import logging
 import requests
 import re
-from telegram import InlineQueryResultArticle, InputTextMessageContent
-from telegram.ext import Updater, CommandHandler, InlineQueryHandler
+from telegram import InlineQueryResultArticle, InputTextMessageContent, InlineKeyboardButton, InlineKeyboardMarkup
+from telegram.ext import Updater, CommandHandler, InlineQueryHandler, CallbackQueryHandler
 
 from exceptions import *
 
@@ -25,7 +25,15 @@ class Query:
         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 not arguments[0].isdigit():
+            reply = search_station(arguments[0])
+            if len(reply) == 1:
+                self.station_id = reply[0]['stationId']
+            else:
+                raise MultipleStationsFoundError(request_tmp, arguments[0], reply)
+        else:
+            self.station_id = arguments[0]
+
         if ' to ' in argument_names:
             self.destination = arguments[argument_names.index(' to ') + 1]
         if ' in ' in argument_names:
@@ -34,16 +42,51 @@ class Query:
             self.departure_count = int(arguments[argument_names.index(' times ') + 1])
 
 
+def build_menu(buttons,
+               n_cols,
+               header_buttons=None,
+               footer_buttons=None):
+    menu = [buttons[i:i + n_cols] for i in range(0, len(buttons), n_cols)]
+    if header_buttons:
+        menu.insert(0, [header_buttons])
+    if footer_buttons:
+        menu.append([footer_buttons])
+    return menu
+
+
+def reply_multiple_stations(message, message_text, queried_station, station_list):
+    button_list = []
+    for station in station_list:
+        button_list.append(InlineKeyboardButton(station['fullName'],
+                                                callback_data="/vvs " + message_text
+                                                .replace(queried_station, station['stationId'])))
+    reply_markup = InlineKeyboardMarkup(build_menu(button_list, n_cols=2))
+    message.reply_text("Multiple stations found:", reply_markup=reply_markup)
+
+
+def handle_multiple_stations_reply(update, context):
+    query = parse_station(update.callback_query.data.split(' ')[1:])
+    departures = get_vvs_departures(query)
+    for reply in departures:
+        context.bot.send_message(update.effective_chat['id'], reply)
+
+
 def search_station(query):
     request = requests.get("https://efa-api.asw.io/api/v1/station/?search=" + query)
-    if request.status_code != 200 or (request.status_code == 200 and len(request.text) <= 2):
-        return -1
+    if request.status_code != 200:
+        raise ServerCommunicationError
+    if request.status_code == 200 and len(request.text) <= 2:
+        raise StationNotFoundError
     else:
-        return request.json()[0]['stationId']
+        return request.json()
 
 
 def handle_vvs(update, context):
+    try:
         query = parse_station(context.args)
+    except MultipleStationsFoundError as error:
+        reply_multiple_stations(update.message, error.message_text, error.queried_station, error.station_list)
+        return
     departures = get_vvs_departures(query)
 
     for reply in departures:
@@ -53,7 +96,12 @@ def handle_vvs(update, context):
 def parse_station(args):
     if len(args) == 0:
         raise NoArgError
+    try:
         query = Query(args)
+    except StationNotFoundError:
+        raise
+    except MultipleStationsFoundError:
+        raise
     if query.station_id == -1:
         raise StationNotFoundError
     return query
@@ -120,6 +168,7 @@ inline_station_search_handler = InlineQueryHandler(inline_station_search)
 dispatcher.add_handler(inline_station_search_handler)
 dispatcher.add_handler(CommandHandler('vvs', handle_vvs))
 dispatcher.add_error_handler(error_callback)
+dispatcher.add_handler(CallbackQueryHandler(handle_multiple_stations_reply))
 
 updater.start_polling()
 updater.idle()

exceptions.py

@@ -8,3 +8,14 @@ class StationNotFoundError(Exception):
 
 class ServerCommunicationError(Exception):
     pass
+
+
+class MultipleStationsFoundError(Exception):
+    message_text = ''
+    queried_station = ''
+    station_list = []
+
+    def __init__(self, message_text, queried_station, station_list):
+        self.message_text = message_text
+        self.queried_station = queried_station
+        self.station_list = station_list