From 4353741c543bdda2ed438fae753b02bdcec7aaca Mon Sep 17 00:00:00 2001
From: Micah <micahnyc@gmail.com>
Date: Mon, 26 Apr 2021 10:07:31 -0400
Subject: [PATCH] fix downloadFile function with waiting for complete

---
 src/engine/openspaceengine_lua.inl | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/engine/openspaceengine_lua.inl b/src/engine/openspaceengine_lua.inl
index d5881b8ada..aa16a79db2 100644
--- a/src/engine/openspaceengine_lua.inl
+++ b/src/engine/openspaceengine_lua.inl
@@ -266,10 +266,14 @@ int removeTag(lua_State* L) {
 * Downloads a file from Lua interpreter
 */
 int downloadFile(lua_State* L) {
-    ghoul::lua::checkArgumentsAndThrow(L, 2, "lua::addTag");
+    int n = ghoul::lua::checkArgumentsAndThrow(L, {2, 3}, "lua::addTag");
 
     const std::string& uri = ghoul::lua::value<std::string>(L, 1);
     const std::string& savePath = ghoul::lua::value<std::string>(L, 2);
+    bool waitForComplete = false;
+    if (n == 3) {
+        waitForComplete = ghoul::lua::value<bool>(L, 3);
+    }
     lua_settop(L, 0);
 
     LINFOC("OpenSpaceEngine", fmt::format("Downloading file from {}", uri));
@@ -281,6 +285,14 @@ int downloadFile(lua_State* L) {
             DownloadManager::FailOnError::Yes,
             5
         );
+
+    if (waitForComplete) {
+        while (!future->isFinished && future->errorMessage.empty() ) {
+            //just wait
+            LTRACEC("OpenSpaceEngine", fmt::format("waiting {}", future->errorMessage));
+        }
+    }
+
     if (!future || !future->isFinished) {
         return ghoul::lua::luaError(
             L,