From c93d6bf91f9ed5eb3db499a4b8dd3c8db056a122 Mon Sep 17 00:00:00 2001
From: Sabine Lim <thesabinelim@gmail.com>
Date: Mon, 8 May 2023 17:22:05 +1000
Subject: [PATCH] Add metatable to Frame

---
 Basalt/plugins/xml.lua | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Basalt/plugins/xml.lua b/Basalt/plugins/xml.lua
index 1de34e3..ae8567f 100644
--- a/Basalt/plugins/xml.lua
+++ b/Basalt/plugins/xml.lua
@@ -438,6 +438,22 @@ return {
                     scripts.env.basalt = basalt
                     scripts.env.main = self
                     scripts.env.shared = {}
+                    scripts.env.sharedObservers = {}
+                    local shared = {}
+                    setmetatable(scripts.env.shared, {
+                        __index = function(_, k)
+                            return shared[k]
+                        end,
+                        __newindex = function(_, k, v)
+                            local observers = scripts.env.sharedObservers[k]
+                            if observers ~= nil then
+                                for _,observer in pairs(observers) do
+                                    observer(v)
+                                end
+                            end
+                            shared[k] = v
+                        end
+                    })
                     local f = fs.open(path, "r")
                     local data = XmlParser:ParseXmlText(f.readAll())
                     f.close()