Fix database locks

lib/Db/Mailbox.php

@@ -82,6 +82,12 @@ class Mailbox extends Entity implements JsonSerializable {
 	protected $specialUse;
 	protected $syncInBackground;
 
+	/**
+	 * @var int
+	 * Lock timeout for sync (5 minutes)
+	 */
+	public const LOCK_TIMEOUT = 300;
+
 	public function __construct() {
 		$this->addType('accountId', 'integer');
 		$this->addType('messages', 'integer');
@@ -119,10 +125,17 @@ public function isCached(): bool {
 			&& $this->getSyncVanishedToken() !== null;
 	}
 
-	public function hasLocks(): bool {
-		return $this->getSyncNewLock() !== null
-			|| $this->getSyncChangedLock() !== null
-			|| $this->getSyncVanishedLock() !== null;
+	public function hasLocks(int $now): bool {
+		if ($this->getSyncNewLock() !== null || $this->getSyncNewLock() > ($now - self::LOCK_TIMEOUT)) {
+			return true;
+		}
+		if ($this->getSyncChangedLock() !== null || $this->getSyncChangedLock() > ($now - self::LOCK_TIMEOUT)) {
+			return true;
+		}
+		if ($this->getSyncVanishedLock() !== null || $this->getSyncVanishedLock() > ($now - self::LOCK_TIMEOUT)) {
+			return true;
+		}
+		return false;
 	}
 
 	public function jsonSerialize() {

lib/Db/MailboxMapper.php

@@ -148,7 +148,7 @@ private function lockForSync(Mailbox $mailbox, string $attr, ?int $lock): int {
 		$now = $this->timeFactory->getTime();
 
 		if ($lock !== null
-			&& $lock > ($now - 5 * 60)) {
+			&& $lock > ($now - Mailbox::LOCK_TIMEOUT)) {
 			// Another process is syncing
 			throw MailboxLockedException::from($mailbox);
 		}

lib/Db/TagMapper.php

@@ -158,7 +158,7 @@ public function getAllTagsForMessages(array $messages): array {
 		foreach ($queryResult as $qr) {
 			$result[] = $qr['imap_message_id'];
 			$result[$qr['imap_message_id']][] = $this->getTag((int)$qr['tag_id']);
-		};
+		}
 		return $result;
 	}
 

lib/Service/Search/MailSearch.php

@@ -39,6 +39,7 @@
 use OCA\Mail\IMAP\PreviewEnhancer;
 use OCA\Mail\IMAP\Search\Provider as ImapSearchProvider;
 use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\IUser;
 
 class MailSearch implements IMailSearch {
@@ -58,16 +59,21 @@ class MailSearch implements IMailSearch {
 	/** @var PreviewEnhancer */
 	private $previewEnhancer;
 
+	/** @var ITimeFactory */
+	private $timeFactory;
+
 	public function __construct(FilterStringParser $filterStringParser,
 								MailboxMapper $mailboxMapper,
 								ImapSearchProvider $imapSearchProvider,
 								MessageMapper $messageMapper,
-								PreviewEnhancer $previewEnhancer) {
+								PreviewEnhancer $previewEnhancer,
+								ITimeFactory $timeFactory) {
 		$this->filterStringParser = $filterStringParser;
 		$this->mailboxMapper = $mailboxMapper;
 		$this->imapSearchProvider = $imapSearchProvider;
 		$this->messageMapper = $messageMapper;
 		$this->previewEnhancer = $previewEnhancer;
+		$this->timeFactory = $timeFactory;
 	}
 
 	public function findMessage(Account $account,
@@ -101,7 +107,7 @@ public function findMessages(Account $account,
 								 ?string $filter,
 								 ?int $cursor,
 								 ?int $limit): array {
-		if ($mailbox->hasLocks()) {
+		if ($mailbox->hasLocks($this->timeFactory->getTime())) {
 			throw MailboxLockedException::from($mailbox);
 		}
 		if (!$mailbox->isCached()) {

tests/Unit/Service/Search/MailSearchTest.php

@@ -39,6 +39,7 @@
 use OCA\Mail\Service\Search\Flag;
 use OCA\Mail\Service\Search\MailSearch;
 use OCA\Mail\Service\Search\SearchQuery;
+use OCP\AppFramework\Utility\ITimeFactory;
 use PHPUnit\Framework\MockObject\MockObject;
 
 class MailSearchTest extends TestCase {
@@ -61,6 +62,9 @@ class MailSearchTest extends TestCase {
 	/** @var MessageMapper|MockObject */
 	private $messageMapper;
 
+	/** @var ITimeFactory|MockObject */
+	private $timeFactory;
+
 	protected function setUp(): void {
 		parent::setUp();
 
@@ -69,13 +73,15 @@ protected function setUp(): void {
 		$this->imapSearchProvider = $this->createMock(Provider::class);
 		$this->messageMapper = $this->createMock(MessageMapper::class);
 		$this->previewEnhancer = $this->createMock(PreviewEnhancer::class);
+		$this->timeFactory = $this->createMock(ITimeFactory::class);
 
 		$this->search = new MailSearch(
 			$this->filterStringParser,
 			$this->mailboxMapper,
 			$this->imapSearchProvider,
 			$this->messageMapper,
-			$this->previewEnhancer
+			$this->previewEnhancer,
+			$this->timeFactory
 		);
 	}