allow to store 64bit mtime

apps/dav/appinfo/Migrations/Version20170607100912.php

@@ -0,0 +1,22 @@
+<?php
+namespace OCA\dav\Migrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\DBAL\Types\Type;
+use OCP\Migration\ISchemaMigration;
+
+/**
+ * changes mtime fields to be able to store 64bit time stamps
+ */
+class Version20170607100912 implements ISchemaMigration {
+
+	public function changeSchema(Schema $schema, array $options) {
+		$prefix = $options['tablePrefix'];
+		$table = $schema->getTable("${prefix}filecache");
+		foreach ( ['mtime','storage_mtime'] as $column ) {
+			if ($table->getColumn($column)->getType()->getName() === Type::INTEGER) {
+				$table->getColumn($column)->setType(Type::getType(Type::BIGINT));
+			}
+		}
+	}
+}

apps/dav/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<description>ownCloud WebDAV endpoint</description>
 	<licence>AGPL</licence>
 	<author>owncloud.org</author>
-	<version>0.3.0</version>
+	<version>0.3.1</version>
 	<default_enable/>
 	<use-migrations>true</use-migrations>
 	<types>

apps/dav/tests/unit/Connector/Sabre/FileTest.php

@@ -399,6 +399,22 @@ public function legalMtimeProvider() {
 					'HTTP_X_OC_MTIME' => -34.43,
 					'expected result' => -34
 			],
+			"long int" => [ 
+					'HTTP_X_OC_MTIME' => PHP_INT_MAX,
+					'expected result' => PHP_INT_MAX 
+			],
+			"too long int" => [ 
+					'HTTP_X_OC_MTIME' => PHP_INT_MAX + 1,
+					'expected result' => PHP_INT_MAX 
+			],
+			"long negative int" => [ 
+					'HTTP_X_OC_MTIME' => PHP_INT_MAX * - 1,
+					'expected result' => (PHP_INT_MAX * - 1)
+			],
+			"too long negative int" => [ 
+					'HTTP_X_OC_MTIME' => (PHP_INT_MAX * - 1) - 1,
+					'expected result' => (PHP_INT_MAX * - 1)
+			],
 		];
 	}