added a simple limit on the number of active bookings allowed

roblib_bee_limits.module

@@ -34,7 +34,7 @@ function roblib_bee_limits_form_bee_add_reservation_form_alter(&$form, FormState
 function roblib_bee_limits_validate_reservation($form, FormStateInterface $form_state) {
   $user = \Drupal\user\Entity\User::load(\Drupal::currentUser()->id());
   $roles = $user->getRoles();
-  debug($roles, 'pp-roles', TRUE);
+  roblib_bee_limits_check_reservations($user, $form, $form_state);
   $values = $form_state->getValues();
   $node = Node::load($values['node']);
   $config_factory = \Drupal::configFactory();
@@ -48,8 +48,39 @@ function roblib_bee_limits_validate_reservation($form, FormStateInterface $form_
   $start_timestamp = new \DateTime($start_date->format('Y-m-d H:i'));
   $end_timestamp = new \DateTime($end_date->format('Y-m-d H:i'));
   $minutes_diff = abs($end_timestamp->getTimestamp() - $start_timestamp->getTimestamp()) / 60;
-  debug($minutes_diff, 'pp-minutesdiff', TRUE);
   if($minutes_diff > 120) {
     $form_state->setError($form, t('Reservation exceeded max booking time of 2 hours.'));
   }
 }
+
+function roblib_bee_limits_check_reservations($user, $form, &$form_state) {
+  $uid = $user->id();
+  $results = \Drupal::entityQuery('bat_event')
+    ->condition('uid', $uid, '=')
+    ->condition('type', 'availability_hourly', '=')
+    ->execute();
+
+  $active_bookings = 0;
+  $now = new DateTime("now");
+  foreach($results as $result){
+    $event = bat_event_load($result);
+    if($event->getEndDate() > $now){
+      $active_bookings++;
+    }
+    $event = NULL;
+  }
+  $max_bookings_allowed = roblib_bee_limits_get_max_bookings_allowed($user);
+  if($max_bookings_allowed != -1 && $active_bookings > $max_bookings_allowed){
+    $form_state->setError($form, t('Reservation exceeded max number of active bookings allowed.'));
+  }
+}
+
+function roblib_bee_limits_get_max_bookings_allowed($user) {
+  $roles = $user->getRoles();
+  $is_admin = array_search('administrator', $roles);
+  if($is_admin) {
+    return -1;
+  }else {
+    return 3;
+  }
+}