add notification email for accounts with extreme negative balances

capsulflask/cli.py

@@ -235,6 +235,9 @@ def get_warnings_list():
 
 def notify_users_about_account_balance():
   accounts = get_model().all_accounts()
+
+  out_of_bounds_accounts = dict()
+
   for account in accounts:
     vms = get_model().list_vms_for_account(account['email'])
     payments = get_model().list_payments_for_account(account['email'])
@@ -243,6 +246,9 @@ def notify_users_about_account_balance():
     balance_now = get_account_balance(vms, payments, datetime.utcnow())
     current_warning = account['account_balance_warning']
 
+    if balance_now < -11:
+      out_of_bounds_accounts[account['email']] = balance_now
+
     longterm_vms = list(filter(lambda vm: vm['shortterm'] == False, vms))
 
     if len(longterm_vms) == 0:
@@ -280,6 +286,28 @@ def notify_users_about_account_balance():
           current_app.logger.warning(f"cron_task: deleting {vm['id']} ( {account['email']} ) due to negative account balance.")
           current_app.config["HUB_MODEL"].destroy(email=account["email"], id=vm['id'])
           get_model().delete_vm(email=account["email"], id=vm['id'])
+  
+  if len(out_of_bounds_accounts) > 0:
+    lines = ["The following accounts have out-of-bounds account balances:", ""]
+
+    for email, balance in out_of_bounds_accounts.items():
+      lines.append(f"{email}: ${format(balance, '.2f')}")
+
+    email_addresses_raw = current_app.config['ADMIN_EMAIL_ADDRESSES'].split(",")
+    email_addresses = list(filter(lambda x: len(x) > 6, map(lambda x: x.strip(), email_addresses_raw ) ))
+
+    current_app.logger.info(f"notify_users_about_account_balance: sending out of bounds account balances email to {','.join(email_addresses)}:")
+    for line in lines:
+      current_app.logger.info(f"notify_users_about_account_balance:      {line}.")
+
+    current_app.config["FLASK_MAIL_INSTANCE"].send(
+        Message(
+          "Capsul Out Of Bounds Account Balance Notification",
+          sender=current_app.config["MAIL_DEFAULT_SENDER"],
+          body="\n".join(lines),
+          recipients=email_addresses
+        )
+    )
 
 
 def delete_shortterm_vms_if_account_is_empty():