Display error notifications when config loading failed

notifications/module.go

@@ -1,15 +1,17 @@
 package notifications
 
 import (
+	"fmt"
 	"time"
 
+	"github.com/safing/portbase/config"
 	"github.com/safing/portbase/modules"
 )
 
 var module *modules.Module
 
 func init() {
-	module = modules.Register("notifications", prep, start, nil, "database", "base")
+	module = modules.Register("notifications", prep, start, nil, "database", "config", "base")
 }
 
 func prep() error {
@@ -22,6 +24,43 @@ func start() error {
 		return err
 	}
 
+	showConfigLoadingErrors()
+
 	go module.StartServiceWorker("cleaner", 1*time.Second, cleaner)
 	return nil
 }
+
+func showConfigLoadingErrors() {
+	validationErrors := config.GetLoadedConfigValidationErrors()
+	if len(validationErrors) == 0 {
+		return
+	}
+
+	// Trigger a module error for more awareness.
+	module.Error(
+		"config:validation-errors-on-load",
+		"Invalid Settings",
+		"Some current settings are invalid. Please update them and restart the Portmaster.",
+	)
+
+	// Send one notification per invalid setting.
+	for _, validationError := range config.GetLoadedConfigValidationErrors() {
+		NotifyError(
+			fmt.Sprintf("config:validation-error:%s", validationError.Option.Key),
+			fmt.Sprintf("Invalid Setting for %s", validationError.Option.Name),
+			fmt.Sprintf(`Your current setting for %s is invalid: %s
+
+Please update the setting and restart the Portmaster, until then the default value is used.`,
+				validationError.Option.Name,
+				validationError.Err.Error(),
+			),
+			Action{
+				Text: "Change",
+				Type: ActionTypeOpenSetting,
+				Payload: &ActionTypeOpenSettingPayload{
+					Key: validationError.Option.Key,
+				},
+			},
+		)
+	}
+}