Deleting posts with files now renames the file so that public links to those files no longer work

api/post.go

@@ -1094,6 +1094,7 @@ func deletePost(c *Context, w http.ResponseWriter, r *http.Request) {
 		message.Add("post", post.ToJson())
 
 		PublishAndForget(message)
+		DeletePostFilesAndForget(c.Session.TeamId, post)
 
 		result := make(map[string]string)
 		result["id"] = postId
@@ -1101,6 +1102,23 @@ func deletePost(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func DeletePostFilesAndForget(teamId string, post *model.Post) {
+	go func() {
+		if len(post.Filenames) == 0 {
+			return
+		}
+
+		prefix := "teams/" + teamId + "/channels/" + post.ChannelId + "/users/" + post.UserId + "/"
+		for _, filename := range post.Filenames {
+			splitUrl := strings.Split(filename, "/")
+			oldPath := prefix + splitUrl[len(splitUrl)-2] + "/" + splitUrl[len(splitUrl)-1]
+			newPath := prefix + splitUrl[len(splitUrl)-2] + "/deleted_" + splitUrl[len(splitUrl)-1]
+			moveFile(oldPath, newPath)
+		}
+
+	}()
+}
+
 func getPostsBefore(c *Context, w http.ResponseWriter, r *http.Request) {
 	getPostsBeforeOrAfter(c, w, r, true)
 }