fixed mensa with given day

mensa.py

@@ -17,6 +17,7 @@ WEEKDAYS = {
     "donnerstag": 4,
     "freitag": 5,
     "samstag": 6,
+    "sonntag": 7
 }
 
 MENSA_URL = {
@@ -73,9 +74,8 @@ def mensa(bot, update, args):
         return
     which = "zentral"
     filter_categories = MODES["light"]
+    auto_next_day = True
     today = datetime.datetime.now().date()
-    if datetime.datetime.now().time() > datetime.time(hour=16):
-        today += datetime.timedelta(days=1)
 
     for arg in args:
         arg = arg.lower()
@@ -84,15 +84,21 @@ def mensa(bot, update, args):
         elif arg in MODES:
             filter_categories = MODES[arg]
         elif arg in WEEKDAYS:
-            today = WEEKDAYS[arg]
+            date_offset = (6 - today.weekday() + WEEKDAYS[arg])
+            today += datetime.timedelta(days=date_offset)
+            auto_next_day = False
         # elif arg in DIETS:
         #     diet = DIETS[arg]
         else:
             update.message.reply_text("Falscher Aufruf! RTFM und versuchs nochmal.")
             return
-    # if today == 0:
-    #     update.message.reply_text("Sonntags hat die Mensa zu")
-    #     return
+
+    if auto_next_day and datetime.datetime.now().time() > datetime.time(hour=16):
+        today += datetime.timedelta(days=1)
+
+    if today.weekday() == 6:
+        update.message.reply_text("Sonntags hat die Mensa zu")
+        return
 
     url = "https://app.mensaplan.de/api/11102/de.mensaplan.app.android.goettingen/%s.json" % MENSA_URL[which]
     request = requests.get(url)
@@ -100,13 +106,16 @@ def mensa(bot, update, args):
     data = request.json()
 
     today_data = get_data_for_day(today, data)
-    message = "Das Essen für %s in der %s \n\n" % (today_data["date"], MENSA_NAME[which])
-    for cat in today_data['categories']:
-        if cat['name'] not in filter_categories:
-            meal_line = "*%s*\n" % cat['name']
-            for meal in cat['meals']:
-                meal_line += meal['name'].strip() + "\n"
-            message += meal_line + '\n'
+    if not today_data:
+        message = today.strftime("Kein Speiseplan für den %d.%m.%Y vorhanden")
+    else:
+        message = "Das Essen für %s in der %s \n\n" % (today_data["date"], MENSA_NAME[which])
+        for cat in today_data['categories']:
+            if cat['name'] not in filter_categories:
+                meal_line = "*%s*\n" % cat['name']
+                for meal in cat['meals']:
+                    meal_line += meal['name'].strip() + "\n"
+                message += meal_line + '\n'
 
     update.message.reply_text(message, ParseMode.MARKDOWN)