move order_by to SQL override logic into a separate function

classes/api.php

@@ -214,21 +214,7 @@ class API extends Handler {
 
 			$_SESSION['hasSandbox'] = $has_sandbox;
 
-			$skip_first_id_check = false;
-
-			$override_order = false;
-			switch (clean($_REQUEST["order_by"])) {
-				case "title":
-					$override_order = "ttrss_entries.title, date_entered, updated";
-					break;
-				case "date_reverse":
-					$override_order = "updated";
-					$skip_first_id_check = true;
-					break;
-				case "feed_dates":
-					$override_order = "updated DESC";
-					break;
-			}
+			list($override_order, $skip_first_id_check) = Feeds::order_to_override_query(clean($_REQUEST["order_by"]));
 
 			/* do not rely on params below */
 

classes/feeds.php

@@ -529,21 +529,7 @@ class Feeds extends Handler_Protected {
 
 		$reply['headlines'] = [];
 
-		$override_order = false;
-		$skip_first_id_check = false;
-
-		switch ($order_by) {
-		case "title":
-			$override_order = "ttrss_entries.title, date_entered, updated";
-			break;
-		case "date_reverse":
-			$override_order = "updated";
-			$skip_first_id_check = true;
-			break;
-		case "feed_dates":
-			$override_order = "updated DESC";
-			break;
-		}
+		list($override_order, $skip_first_id_check) = Feeds::order_to_override_query($order_by);
 
 		$ret = $this->format_headlines_list($feed, $method,
 			$view_mode, $limit, $cat_view, $offset,
@@ -2348,5 +2334,25 @@ class Feeds extends Handler_Protected {
 
 		return array($search_query_part, $search_words);
 	}
+
+	static function order_to_override_query($order) {
+		$query = "";
+		$skip_first_id = false;
+
+		switch ($order) {
+			case "title":
+				$query = "ttrss_entries.title, date_entered, updated";
+				break;
+			case "date_reverse":
+				$query = "updated";
+				$skip_first_id = true;
+				break;
+			case "feed_dates":
+				$query = "updated DESC";
+				break;
+		}
+
+		return [$query, $skip_first_id];
+	}
 }
 

classes/handler/public.php

@@ -12,24 +12,16 @@ class Handler_Public extends Handler {
 
 		if (!$limit) $limit = 60;
 
-		$date_sort_field = "date_entered DESC, updated DESC";
+		list($override_order, $skip_first_id_check) = Feeds::order_to_override_query($order);
 
-		if ($feed == -2 && !$is_cat) {
-			$date_sort_field = "last_published DESC";
-		} else if ($feed == -1 && !$is_cat) {
-			$date_sort_field = "last_marked DESC";
-		}
+		if (!$override_order) {
+			$override_order = "date_entered DESC, updated DESC";
 
-		switch ($order) {
-		case "title":
-			$date_sort_field = "ttrss_entries.title, date_entered, updated";
-			break;
-		case "date_reverse":
-			$date_sort_field = "updated";
-			break;
-		case "feed_dates":
-			$date_sort_field = "updated DESC";
-			break;
+			if ($feed == -2 && !$is_cat) {
+				$override_order = "last_published DESC";
+			} else if ($feed == -1 && !$is_cat) {
+				$override_order = "last_marked DESC";
+			}
 		}
 
 		$params = array(
@@ -39,7 +31,7 @@ class Handler_Public extends Handler {
 			"view_mode" => $view_mode,
 			"cat_view" => $is_cat,
 			"search" => $search,
-			"override_order" => $date_sort_field,
+			"override_order" => $override_order,
 			"include_children" => true,
 			"ignore_vfeed_group" => true,
 			"offset" => $offset,