From cfc16679cb91d4a580d98b549782ee2af7682361 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Wed, 11 Dec 2024 14:49:52 +0300
Subject: [PATCH] add test.open_world

---
 dev/tests/example.lua  | 12 ++++++++++++
 res/scripts/stdlib.lua |  1 +
 src/world/World.cpp    |  6 ++++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/dev/tests/example.lua b/dev/tests/example.lua
index 6262e369..a1a0c369 100644
--- a/dev/tests/example.lua
+++ b/dev/tests/example.lua
@@ -1,8 +1,20 @@
+-- Create/close/open/close world
+
+-- Open
 test.new_world("demo", "2019", "core:default")
 assert(world.is_open())
 assert(world.get_generator() == "core:default")
 test.sleep(1)
 assert(world.get_total_time() > 0.0)
 print(world.get_total_time())
+
+-- Close
 test.close_world(true)
 assert(not world.is_open())
+
+-- Reopen
+test.open_world("demo")
+assert(world.is_open())
+assert(world.get_total_time() > 0.0)
+test.tick()
+test.close_world(true)
diff --git a/res/scripts/stdlib.lua b/res/scripts/stdlib.lua
index a732fde6..3d21def6 100644
--- a/res/scripts/stdlib.lua
+++ b/res/scripts/stdlib.lua
@@ -13,6 +13,7 @@ if test then
     test.sleep = sleep
     test.name = __VC_TEST_NAME
     test.new_world = core.new_world
+    test.open_world = core.open_world
     test.close_world = core.close_world
     test.reconfig_packs = core.reconfig_packs
     test.tick = coroutine.yield
diff --git a/src/world/World.cpp b/src/world/World.cpp
index bec61d3a..812f6d91 100644
--- a/src/world/World.cpp
+++ b/src/world/World.cpp
@@ -133,8 +133,10 @@ std::unique_ptr<Level> World::load(
         auto playerRoot = files::read_json(file);
         level->players->deserialize(playerRoot);
 
-        if (!playerRoot["players"][0].has("id")) {
-            level->getWorld()->getInfo().nextPlayerId++;
+        if (!playerRoot["players"].empty()) {
+            if (!playerRoot["players"][0].has("id")) {
+                level->getWorld()->getInfo().nextPlayerId++;
+            }
         }
     }
     return level;