Take better advantage of other users refresh

app/Controllers/feedController.php

@@ -242,7 +242,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 				$feeds[] = $feed;
 			}
 		} else {
-			$feeds = $feedDAO->listFeedsOrderUpdate(FreshRSS_Context::$user_conf->ttl_default);
+			$feeds = $feedDAO->listFeedsOrderUpdate(-1);
 		}
 
 		// Calculate date of oldest entries we accept in DB.
@@ -266,6 +266,20 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 				continue;	//When PubSubHubbub is used, do not pull refresh so often
 			}
 
+			$mtime = 0;
+			$ttl = $feed->ttl();
+			if ($ttl == -1) {
+				continue;	//Feed refresh is disabled
+			}
+			if (feed->lastUpdate() < time() - ($ttl == -2 ? FreshRSS_Context::$user_conf->ttl_default : $ttl)) {
+				//Too early to refresh from source, but check if the feed was already updated by another user
+				$mtime = feed->cacheModifiedTime();
+				if (feed->lastUpdate() >= $mtime + 10) {
+					continue;	//Nothing newer from other users
+				}
+				Minz_Log::debug($feed->url() . ' was recently updated by another user');
+			}
+
 			if (!$feed->lock()) {
 				Minz_Log::notice('Feed already being actualized: ' . $feed->url());
 				continue;
@@ -358,7 +372,7 @@ class FreshRSS_feed_Controller extends Minz_ActionController {
 						$entryDAO->addEntry($entry->toArray());
 					}
 				}
-				$entryDAO->updateLastSeen($feed->id(), $oldGuids);
+				$entryDAO->updateLastSeen($feed->id(), $oldGuids, $mtime);
 			}
 
 			if ($feed_history >= 0 && rand(0, 30) === 1) {

app/Models/EntryDAO.php

@@ -707,13 +707,16 @@ class FreshRSS_EntryDAO extends Minz_ModelPdo implements FreshRSS_Searchable {
 		}
 	}
 
-	public function updateLastSeen($id_feed, $guids) {
+	public function updateLastSeen($id_feed, $guids, $mtime = 0) {
 		if (count($guids) < 1) {
 			return 0;
 		}
 		$sql = 'UPDATE `' . $this->prefix . 'entry` SET `lastSeen`=? WHERE id_feed=? AND guid IN (' . str_repeat('?,', count($guids) - 1). '?)';
 		$stm = $this->bd->prepare($sql);
-		$values = array(time(), $id_feed);
+		if ($mtime <= 0) {
+			$mtime = time();
+		}
+		$values = array($mtime, $id_feed);
 		$values = array_merge($values, $guids);
 		if ($stm && $stm->execute($values)) {
 			return $stm->rowCount();

app/Models/Feed.php

@@ -340,6 +340,10 @@ class FreshRSS_Feed extends Minz_Model {
 		$this->entries = $entries;
 	}
 
+	function cacheModifiedTime() {
+		return @filemtime(CACHE_PATH . '/' . md5($this->url) . '.spc');
+	}
+
 	function lock() {
 		$this->lockPath = TMP_PATH . '/' . $this->hash() . '.freshrss.lock';
 		if (file_exists($this->lockPath) && ((time() - @filemtime($this->lockPath)) > 3600)) {

app/Models/FeedDAO.php

@@ -222,13 +222,13 @@ class FreshRSS_FeedDAO extends Minz_ModelPdo implements FreshRSS_Searchable {
 		return $feedCategoryNames;
 	}
 
+	/**
+	 * Use $defaultCacheDuration == -1 to return all feeds, without filtering them by TTL.
+	 */
 	public function listFeedsOrderUpdate($defaultCacheDuration = 3600) {
-		if ($defaultCacheDuration < 0) {
-			$defaultCacheDuration = 2147483647;
-		}
 		$sql = 'SELECT id, url, name, website, `lastUpdate`, `pathEntries`, `httpAuth`, keep_history, ttl '
 		     . 'FROM `' . $this->prefix . 'feed` '
-		     . 'WHERE ttl <> -1 AND `lastUpdate` < (' . (time() + 60) . '-(CASE WHEN ttl=-2 THEN ' . intval($defaultCacheDuration) . ' ELSE ttl END)) '
+		     . ($defaultCacheDuration < 0 ? '' : 'WHERE ttl <> -1 AND `lastUpdate` < (' . (time() + 60) . '-(CASE WHEN ttl=-2 THEN ' . intval($defaultCacheDuration) . ' ELSE ttl END)) ')
 		     . 'ORDER BY `lastUpdate`';
 		$stm = $this->bd->prepare($sql);
 		if (!($stm && $stm->execute())) {