send mail to user when account balances is added to

src/ezgg_lan_manager/pages/ManageUsersPage.py

@@ -6,7 +6,7 @@ from rio import Column, Component, event, TextStyle, Text, TextInput, ThemeConte
     PointerEventListener, PointerEvent, Rectangle, CursorStyle, Color, TextInputChangeEvent, Spacer, Row, Switch, \
     SwitchChangeEvent, EventHandler
 
-from src.ezgg_lan_manager import ConfigurationService, UserService, AccountingService, SeatingService
+from src.ezgg_lan_manager import ConfigurationService, UserService, AccountingService, SeatingService, MailingService
 from src.ezgg_lan_manager.components.MainViewContentBox import MainViewContentBox
 from src.ezgg_lan_manager.components.NewTransactionForm import NewTransactionForm
 from src.ezgg_lan_manager.components.UserEditForm import UserEditForm
@@ -104,11 +104,17 @@ class ManageUsersPage(Component):
                 self.accounting_section_result_success = False
                 return
         else:
-            await self.session[AccountingService].add_balance(
+            new_total_balance = await self.session[AccountingService].add_balance(
                 transaction.user_id,
                 transaction.value,
                 transaction.reference
             )
+            user = await self.session[UserService].get_user(transaction.user_id)
+            await self.session[MailingService].send_email(
+                "Dein Guthaben wurde aufgeladen",
+                self.session[MailingService].generate_account_balance_added_mail_body(user, transaction.value, new_total_balance),
+                user.user_mail
+            )
 
         self.accounting_section_result_text = f"Guthaben {'entfernt' if transaction.is_debit else 'hinzugefügt'}!"
         self.accounting_section_result_success = True