Support of s3 storage class in External Storage application

Signed-off-by: François Ménabé <francois.menabe@gmail.com>

apps/files_external/lib/Lib/Backend/AmazonS3.php

@@ -47,6 +47,8 @@ class AmazonS3 extends Backend {
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('region', $l->t('Region')))
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
+				(new DefinitionParameter('storageClass', $l->t('Storage Class')))
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('use_ssl', $l->t('Enable SSL')))
 					->setType(DefinitionParameter::VALUE_BOOLEAN),
 				(new DefinitionParameter('use_path_style', $l->t('Enable Path Style')))

apps/files_external/lib/Lib/Storage/AmazonS3.php

@@ -583,7 +583,8 @@ class AmazonS3 extends \OC\Files\Storage\Common {
 				$this->getConnection()->copyObject([
 					'Bucket' => $this->bucket,
 					'Key' => $this->cleanKey($target),
-					'CopySource' => S3Client::encodeKey($this->bucket . '/' . $source)
+					'CopySource' => S3Client::encodeKey($this->bucket . '/' . $source),
+					'StorageClass' => $this->storageClass,
 				]);
 				$this->testTimeout();
 			} catch (S3Exception $e) {