ccache: remove obsolete data on feed/category removal

functions.php

@@ -5754,6 +5754,19 @@
 			value = 0 WHERE owner_uid = '$owner_uid'");
 	}
 
+	function ccache_remove($link, $feed_id, $owner_uid, $is_cat = false) {
+
+		if (!$is_cat) {
+			$table = "ttrss_counters_cache";
+		} else {
+			$table = "ttrss_cat_counters_cache";
+		}
+
+		db_query($link, "DELETE FROM $table WHERE
+			feed_id = '$feed_id' AND owner_uid = '$owner_uid'");
+
+	}
+
 	function ccache_update_all($link, $owner_uid) {
 
 		if (get_pref($link, 'ENABLE_FEED_CATS', $owner_uid)) {

modules/pref-feeds.php

@@ -702,8 +702,12 @@
 					if (file_exists($icons_dir . "/$id.ico")) {
 						unlink($icons_dir . "/$id.ico");
 					}
+
+					ccache_remove($link, $id, $_SESSION["uid"]);
+
 				} else {
 					label_remove($link, -11-$id, $_SESSION["uid"]);
+					ccache_remove($link, -11-$id, $_SESSION["uid"]);
 				}
 			}
 		}
@@ -992,6 +996,9 @@
 						if ($num_feeds == 0) {
 							db_query($link, "DELETE FROM ttrss_feed_categories
 								WHERE id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+
+							ccache_remove($link, $id, $_SESSION["uid"], true);
+
 						} else {
 	
 							print format_warning(__("Unable to delete non empty feed categories."));