Fix TypeError, when getEmail() is null (#56)

* Fix TypeError, when getEmail() is null

* Apply php-cs-fixer changes

---------

Co-authored-by: blankse <blankse@users.noreply.github.com>

Author: blankse

src/Document/Newsletter/AddressSourceAdapter/DefaultAdapter.php

@@ -142,7 +142,7 @@ public function getParamsForSingleSending(int $limit, int $offset): array
         $containers = [];
 
         foreach ($objects as $object) {
-            if (method_exists($object, 'getEmail')) {
+            if (method_exists($object, 'getEmail') && $object->getEmail()) {
                 $containers[] = new SendingParamContainer($object->getEmail(), [
                     'gender' => method_exists($object, 'getGender') ? $object->getGender() : '',
                     'firstname' => method_exists($object, 'getFirstname') ? $object->getFirstname() : '',

src/Installer.php

@@ -79,7 +79,7 @@ private function addUserPermission(): void
         foreach (self::USER_PERMISSIONS as $permission) {
             // check if the permission already exists
             $permissionExists = $db->executeStatement('SELECT `key` FROM users_permission_definitions WHERE `key` = :key', ['key' => $permission]);
-            if(!$permissionExists) {
+            if (!$permissionExists) {
                 $db->insert('users_permission_definitions', [
                     $db->quoteIdentifier('key') => $permission,
                     $db->quoteIdentifier('category') => self::USER_PERMISSION_CATEGORY,
@@ -139,11 +139,11 @@ private function modifyEnumTypes(array $enums): void
 
     private function removeNewsLetterDocTypes(): void
     {
-        foreach(SettingsStore::getIdsByScope(self::SETTINGS_STORE_SCOPE) as $id) {
+        foreach (SettingsStore::getIdsByScope(self::SETTINGS_STORE_SCOPE) as $id) {
             $newsletterDocType = SettingsStore::get($id, self::SETTINGS_STORE_SCOPE);
-            if($newsletterDocType) {
+            if ($newsletterDocType) {
                 $data = json_decode($newsletterDocType->getData(), true);
-                if(!empty($data) && $data['type'] === self::DOCTYPE) {
+                if (!empty($data) && $data['type'] === self::DOCTYPE) {
                     SettingsStore::delete($id, self::SETTINGS_STORE_SCOPE);
                 }
             }