Warn admins about delayed cron executions

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/settings/lib/Settings/Admin/Server.php

@@ -29,16 +29,19 @@ namespace OCA\Settings\Settings\Admin;
 
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\IConfig;
+use OCP\IDBConnection;
 use OCP\Settings\ISettings;
 
 class Server implements ISettings {
+
+	/** @var IDBConnection */
+	private $connection;
 	/** @var IConfig */
 	private $config;
 
-	/**
-	 * @param IConfig $config
-	 */
-	public function __construct(IConfig $config) {
+	public function __construct(IDBConnection $connection,
+								IConfig $config) {
+		$this->connection = $connection;
 		$this->config = $config;
 	}
 
@@ -46,10 +49,25 @@ class Server implements ISettings {
 	 * @return TemplateResponse
 	 */
 	public function getForm() {
+		$query = $this->connection->getQueryBuilder();
+		$query->select('last_checked')
+			->from('jobs')
+			->orderBy('last_checked', 'ASC')
+			->setMaxResults(1);
+
+		$result = $query->execute();
+		if ($row = $result->fetch()) {
+			$maxAge = (int) $row['last_checked'];
+		} else {
+			$maxAge = time();
+		}
+		$result->closeCursor();
+
 		$parameters = [
 			// Background jobs
 			'backgroundjobs_mode' => $this->config->getAppValue('core', 'backgroundjobs_mode', 'ajax'),
 			'lastcron'            => $this->config->getAppValue('core', 'lastcron', false),
+			'cronMaxAge'          => $maxAge,
 			'cronErrors'		  => $this->config->getAppValue('core', 'cronErrors'),
 			'cli_based_cron_possible' => function_exists('posix_getpwuid'),
 			'cli_based_cron_user' => function_exists('posix_getpwuid') ? posix_getpwuid(fileowner(\OC::$configDir . 'config.php'))['name'] : '',

apps/settings/templates/settings/admin/server.php

@@ -29,26 +29,40 @@
 <div class="section" id="backgroundjobs">
 	<h2 class="inlineblock"><?php p($l->t('Background jobs'));?></h2>
 	<p class="cronlog inlineblock">
-		<?php if ($_['lastcron'] !== false):
+		<?php if ($_['lastcron'] !== false) {
 			$relative_time = relative_modified_date($_['lastcron']);
+			$maxAgeRelativeTime = relative_modified_date($_['cronMaxAge']);
 
 			$formatter = \OC::$server->getDateTimeFormatter();
 			$absolute_time = $formatter->formatDateTime($_['lastcron'], 'long', 'long');
-			if (time() - $_['lastcron'] <= 600): ?>
-				<span class="status success"></span>
-				<span class="crondate" title="<?php p($absolute_time);?>">
-				<?php p($l->t("Last job ran %s.", [$relative_time]));?>
-			</span>
-			<?php else: ?>
+			$maxAgeAbsoluteTime = $formatter->formatDateTime($_['cronMaxAge'], 'long', 'long');
+			if (time() - $_['lastcron'] > 600) { ?>
 				<span class="status error"></span>
 				<span class="crondate" title="<?php p($absolute_time);?>">
-				<?php p($l->t("Last job execution ran %s. Something seems wrong.", [$relative_time]));?>
-			</span>
-			<?php endif;
-		else: ?>
+					<?php p($l->t("Last job execution ran %s. Something seems wrong.", [$relative_time]));?>
+				</span>
+			<?php } else if (time() - $_['cronMaxAge'] > 12*3600) {
+					if ($_['backgroundjobs_mode'] === 'cron') { ?>
+						<span class="status warning"></span>
+						<span class="crondate" title="<?php p($maxAgeAbsoluteTime);?>">
+							<?php p($l->t("Some jobs haven’t been executed since %s. Please consider increasing the execution frequency.", [$maxAgeRelativeTime]));?>
+						</span>
+					<?php } else { ?>
+						<span class="status error"></span>
+						<span class="crondate" title="<?php p($maxAgeAbsoluteTime);?>">
+							<?php p($l->t("Some jobs didn’t execute since %s. Please consider switching to system cron.", [$maxAgeRelativeTime]));?>
+						</span>
+					<?php }
+			} else { ?>
+				<span class="status success"></span>
+				<span class="crondate" title="<?php p($absolute_time);?>">
+					<?php p($l->t("Last job ran %s.", [$relative_time]));?>
+				</span>
+			<?php }
+		} else { ?>
 			<span class="status error"></span>
 			<?php p($l->t("Background job didn’t run yet!"));
-		endif; ?>
+		} ?>
 	</p>
 	<a target="_blank" rel="noreferrer noopener" class="icon-info"
 	   title="<?php p($l->t('Open documentation'));?>"