fix creating vcards with multiple string values

Internally it is valid to provide multiple values for a property as
plain string. An exampe is given in the PhpDoc of
AddressBookImpl::search().

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

apps/dav/lib/CardDAV/AddressBookImpl.php

@@ -150,6 +150,9 @@ class AddressBookImpl implements IAddressBook {
 			if (is_array($value)) {
 				$vCard->remove($key);
 				foreach ($value as $entry) {
+					if (is_string($entry)) {
+						$property = $vCard->createProperty($key, $entry);
+					} else {
 						if (($key === "ADR" || $key === "PHOTO") && is_string($entry["value"])) {
 							$entry["value"] = stripslashes($entry["value"]);
 							$entry["value"] = explode(';', $entry["value"]);
@@ -158,6 +161,7 @@ class AddressBookImpl implements IAddressBook {
 						if (isset($entry["type"])) {
 							$property->add('TYPE', $entry["type"]);
 						}
+					}
 					$vCard->add($property);
 				}
 			} elseif ($key !== 'URI') {

apps/dav/tests/unit/CardDAV/AddressBookImplTest.php

@@ -154,11 +154,20 @@ class AddressBookImplTest extends TestCase {
 			->setMethods(['vCard2Array', 'createUid', 'createEmptyVCard'])
 			->getMock();
 
+		$expectedProperties = 0;
+		foreach ($properties as $data) {
+			if (is_string($data)) {
+				$expectedProperties++;
+			} else {
+				$expectedProperties += count($data);
+			}
+		}
+
 		$addressBookImpl->expects($this->once())->method('createUid')
 			->willReturn($uid);
 		$addressBookImpl->expects($this->once())->method('createEmptyVCard')
 			->with($uid)->willReturn($this->vCard);
-		$this->vCard->expects($this->exactly(count($properties)))
+		$this->vCard->expects($this->exactly($expectedProperties))
 			->method('createProperty');
 		$this->backend->expects($this->once())->method('createCard');
 		$this->backend->expects($this->never())->method('updateCard');
@@ -172,7 +181,8 @@ class AddressBookImplTest extends TestCase {
 	public function dataTestCreate() {
 		return [
 			[[]],
-			[['FN' => 'John Doe']]
+			[['FN' => 'John Doe']],
+			[['FN' => 'John Doe', 'EMAIL' => ['john@doe.cloud', 'john.doe@example.org']]],
 		];
 	}