Fix rewrites

internal/torrent/util.go

@@ -2,15 +2,20 @@ package torrent
 
 import (
 	"fmt"
-	"strings"
+	"sort"
 )
 
-func getFileIDs(files []*File) string {
-	var fileIDs []string
+func getFileIDs(files []*File) []string {
+	var fileIDs []int
 	for _, file := range files {
 		if file.ID != 0 {
-			fileIDs = append(fileIDs, fmt.Sprintf("%d", file.ID))
+			fileIDs = append(fileIDs, file.ID)
 		}
 	}
-	return strings.Join(fileIDs, ",")
+	sort.Ints(fileIDs)
+	var ret []string
+	for _, id := range fileIDs {
+		ret = append(ret, fmt.Sprintf("%d", id))
+	}
+	return ret
 }