Add methods to handle user notification preferences and update booking notification logic

- Introduced `wantsSmsNotifications`, `wantsEmailNotifications`, and `getWashCertificateEmail` methods in `users_o`.
- Updated `order_bookings_o` to incorporate user notification preferences for sending SMS and email confirmations.

services/nginx/app/objects/order_bookings_o.php

@@ -135,11 +135,13 @@ class order_bookings_o extends db
             // Check if the customer has a phone number
             $country_code = $customer->phone_country_code->value();
             $customer_phone = $customer->phone->value();
-            $customer_email = $customer->email->value();
+            $customer_email = !empty($customer->wash_certificate_email->value())
+                ? $customer->wash_certificate_email->value()
+                : $customer->email->value();
             if (empty($customer_phone) && empty($customer_email)) {
                 return;
             }
-            if (!empty($customer_phone)) {
+            if (!empty($customer_phone) && $customer->wantsSmsNotifications()) {
                 // Send an SMS confirmation to the customer
                 $gatewayapi = new gatewayapi();
                 $message = "Tak for din booking hos " . $branding->name->value() . ". Dit bookingnummer er " . $this->id . ". "
@@ -164,7 +166,7 @@ class order_bookings_o extends db
                 }
             }
             // Check if the customer has an email
-            if (!empty($customer_email)) {
+            if (!empty($customer_email) && $customer->wantsEmailNotifications()) {
                 // Send an email confirmation to the customer
                 $email = new email();
                 $email->sendOrderBookingConfirmationEmail($this);

services/nginx/app/objects/users_o.php

@@ -176,6 +176,34 @@ class users_o extends db
         return false;
     }
 
+    /**
+     * @throws Exception
+     */
+    public function wantsSmsNotifications(): bool
+    {
+        self::requireSelected();
+        return (bool)$this->sms_notifications_enabled->value();
+    }
+
+    /**
+     * @throws Exception
+     */
+    public function wantsEmailNotifications(): bool
+    {
+        self::requireSelected();
+        return (bool)$this->email_notifications_enabled->value();
+    }
+
+    /**
+     * @throws Exception
+     */
+    public function getWashCertificateEmail(): string|null
+    {
+        self::requireSelected();
+        return $this->wash_certificate_email->value();
+    }
+
+
     public function add(string $customer_number, mixed $password, int $role = 0): void
     {
         global $db;