make login more sturdy

src/elm/pages/LoginPage.py

@@ -32,6 +32,9 @@ class LoginPage(Component):
         self.login_in_progress = True
         user_name = copy(self.user_name)  # Prevents race condition name swap
         is_valid = await self.session[UserService].is_login_valid(user_name, self.password)
+        if not is_valid:  # Migrated users
+            user_name = user_name.lower().capitalize()
+            is_valid = await self.session[UserService].is_login_valid(user_name, self.password)
         if is_valid:
             user: User = await self.session[UserService].get_user(user_name)
             self.error_on_last_attempt = False

src/elm/services/DatabaseService.py

@@ -1,8 +1,10 @@
 import logging
+import sys
 
 from beanie import init_beanie
 from pymongo import AsyncMongoClient
 from pymongo.asynchronous.collection import AsyncCollection
+from pymongo.errors import ServerSelectionTimeoutError, OperationFailure
 
 from elm.types import User, Transaction, Ticket, Seat, CateringTypes
 from elm.types.ConfigurationTypes import DatabaseConfiguration
@@ -30,6 +32,15 @@ class DatabaseService:
         if self._client is None:
             self._client = AsyncMongoClient(mongo_uri)
 
+            try:
+                await self._client.admin.command("ping")
+            except ServerSelectionTimeoutError:
+                print("Could not connect to mongodb")
+                sys.exit(1)
+            except OperationFailure:
+                print("Authentication with mongodb failed")
+                sys.exit(1)
+
             self._database = self._client[
                 self._db_config.database_name
             ]

src/elm/services/UserService.py

@@ -1,4 +1,3 @@
-from asyncio import sleep
 from hashlib import sha256
 from typing import Optional
 from string import ascii_letters, digits
@@ -69,8 +68,6 @@ class UserService:
 
     async def is_login_valid(self, user_name: str, password_clear_text: str) -> bool:
         user = await self.get_user(user_name)
-        if not user:
-            user = await self.get_user(user_name.lower())  # Migrated users had all lowercase names
         user_password_hash = sha256(password_clear_text.encode(encoding="utf-8")).hexdigest()
         if not user:
             return False