Save custom fields on subscribe

- added methods to get/set a specific custom field
- added method to get all custom fields (and assign each custom field to the subscriber's instance)
- fixed zIndex of form editor's toolbar (footer was positioned above, preventing click)

lib/Models/SubscriberCustomField.php

@@ -12,6 +12,33 @@ class SubscriberCustomField extends Model {
     parent::__construct();
   }
 
+  static function createOrUpdate($data = array()) {
+    $custom_field = CustomField::findOne($data['custom_field_id'])->asArray();
+    if($custom_field === false) return false;
+
+    if($custom_field['type'] === 'date') {
+      if(is_array($data['value'])) {
+        $day = (isset($data['value']['day']) ? : 1);
+        $month = (isset($data['value']['month']) ? : 1);
+        $year = (isset($data['value']['year']) ? : 1970);
+        $data['value'] = mktime(0, 0, 0, $month, $day, $year);
+      }
+    }
+
+    $relation = self::where('custom_field_id', $data['custom_field_id'])
+      ->where('subscriber_id', $data['subscriber_id'])
+      ->findOne();
+
+    if($relation === false) {
+      $relation = self::create();
+      $relation->hydrate($data);
+    } else {
+      $relation->set($data);
+    }
+
+    return $relation->save();
+  }
+
   static function createMultiple($values) {
     $values = array_map('array_values', $values);
     return self::rawExecute(