improve lookup server behaviour

Don't try to connect to the lookup server if the lookup server was disabled
by the admin or an empty lookup server URL was given

Signed-off-by: Bjoern Schiessle <bjoern@schiessle.org>

apps/lookup_server_connector/lib/BackgroundJobs/RetryJob.php

@@ -75,7 +75,7 @@ class RetryJob extends Job {
 	}
 
 	protected function run($argument) {
-		if ($argument['retryNo'] === 5 || empty($this->lookupServer)) {
+		if ($this->killBackgroundJob((int)$argument['retryNo'])) {
 			return;
 		}
 
@@ -110,4 +110,23 @@ class RetryJob extends Job {
 	protected function shouldRun($argument) {
 		return !isset($argument['lastRun']) || ((time() - $argument['lastRun']) > $this->interval);
 	}
+
+	/**
+	 * check if we should kill the background job
+	 *
+	 * The lookup server should no longer be contacted if:
+	 *
+	 * - max retries are reached (set to 5)
+	 * - lookup server was disabled by the admin
+	 * - no valid lookup server URL given
+	 *
+	 * @param int $retryCount
+	 * @return bool
+	 */
+	protected function killBackgroundJob($retryCount) {
+		$maxTriesReached = $retryCount >= 5;
+		$lookupServerDisabled = $this->config->getAppValue('files_sharing', 'lookupServerUploadEnabled', 'yes') !== 'yes';
+
+		return $maxTriesReached || $lookupServerDisabled || empty($this->lookupServer);
+	}
 }

apps/lookup_server_connector/lib/UpdateLookupServer.php

@@ -46,6 +46,8 @@ class UpdateLookupServer {
 	private $jobList;
 	/** @var string URL point to lookup server */
 	private $lookupServer;
+	/** @var bool  */
+	private $lookupServerEnabled;
 
 	/**
 	 * @param AccountManager $accountManager
@@ -68,6 +70,8 @@ class UpdateLookupServer {
 			return;
 		}
 
+		$this->lookupServerEnabled = $this->config->getAppValue('files_sharing', 'lookupServerUploadEnabled', 'yes') === 'yes';
+
 		$this->lookupServer = $config->getSystemValue('lookup_server', 'https://lookup.nextcloud.com');
 		if(!empty($this->lookupServer)) {
 			$this->lookupServer = rtrim($this->lookupServer, '/');
@@ -79,7 +83,8 @@ class UpdateLookupServer {
 	 * @param IUser $user
 	 */
 	public function userUpdated(IUser $user) {
-		if(empty($this->lookupServer)) {
+
+		if (!$this->shouldUpdateLookupServer()) {
 			return;
 		}
 
@@ -150,4 +155,17 @@ class UpdateLookupServer {
 			);
 		}
 	}
+
+	/**
+	 * check if we should update the lookup server, we only do it if
+	 *
+	 * * we have a valid URL
+	 * * the lookup server update was enabled by the admin
+	 *
+	 * @return bool
+	 */
+	private function shouldUpdateLookupServer() {
+		return $this->lookupServerEnabled || !empty($this->lookupServer);
+	}
+
 }