make feed browser ignore already subscribed feeds

backend.php

@@ -1536,10 +1536,20 @@
 			
 			print "<ul class='browseFeedList' id='browseFeedList'>";
 
+			$feedctr = 0;
+			
 			while ($line = db_fetch_assoc($result)) {
 				$feed_url = $line["feed_url"];
 				$subscribers = $line["subscribers"];
 
+				$sub_result = db_query($link, "SELECT id
+					FROM ttrss_feeds WHERE feed_url = '$feed_url' AND owner_uid =" . 
+					$_SESSION["uid"]);
+
+				if (db_num_rows($sub_result) > 0) {
+					continue; // already subscribed
+				}
+			
 				$det_result = db_query($link, "SELECT site_url,title,id 
 					FROM ttrss_feeds WHERE feed_url = '$feed_url' LIMIT 1");
 
@@ -1560,6 +1570,12 @@
 				print "<li id=\"FBROW-".$details["id"]."\">$check_box $feed_icon" . 
 					$details["title"] . 
 					"&nbsp;<span class='subscribers'>($subscribers)</span></li>";
+
+					++$feedctr;
+			}
+
+			if ($feedctr == 0) {
+				print "<li>No feeds found to subscribe.</li>";
 			}
 
 			print "</ul>";