Add email and notification improvements for bookings

Refactored notification methods to handle Slack, SMS, and email delivery logic more effectively. Introduced `sendBookingNotification` email functionality and a new template for booking notifications. Improved handling of booking data for emails and centralized logic for retrieving booking details.

services/nginx/app/objects/bookings_o.php

@@ -283,6 +283,7 @@ class bookings_o extends db
     /**
      * Notify the department about a new booking
      * @throws Exception If the object is not selected
+     * @throws ClientExceptionInterface If the request to the API fails
      */
     public function notifyNewBooking(): void
     {
@@ -301,8 +302,19 @@ class bookings_o extends db
         $customer = (new users_o())->getUserByCustomerNumber((int)$this->customer_number->value());
         $department_array = $department->asArray();
         $customer_array = $customer->asArray();
+        // Define delivery methods
+        $deliverSlack = !empty($department->slack_webhook->value());
+        $deliverSMS = (
+            !empty($branding->phone_country_code->value()) &&
+            !empty($branding->phone->value()) &&
+            !$deliverSlack // Only send SMS if slack is not available
+        );
+        $deliverEmail = (
+            !empty($this->contact_email->value()) &&
+            !$deliverSlack // Only send email if slack is not available
+        );
         // Check if the department has a slack webhook
-        if (!empty($department->slack_webhook->value())) {
+        if ($deliverSlack) {
             // Send a notification to the department
             $slack = new slack();
             $slack->send_department_booking_notification($department->id, $slack->format_new_booking(
@@ -322,7 +334,9 @@ class bookings_o extends db
                 $this->washCertificateUrl->value(),
                 $this->status->value()
             ));
-        } elseif (!empty($branding->phone_country_code->value()) && !empty($branding->phone->value())) {
+        }
+
+        if (!$deliverSMS) {
             // Send an SMS notification to the department
             $gatewayapi = new gatewayapi();
             $gatewayapi->send(
@@ -330,6 +344,12 @@ class bookings_o extends db
                 'New booking from ' . $customer->getCustomerName($customer_array['customer_number']) . ' (' . $this->id . ')',
             );
         }
+
+        if ($deliverEmail) {
+            // Send an email notification to the department
+            $email = new email();
+            $email->sendBookingNotification($this->id);
+        }
     }
 
     /**