1 files changed, 61 insertions, 0 deletions
diff --git a/server/src/core/global.lua b/server/src/core/global.lua
new file mode 100644
index 00000000..8aa801de
--- /dev/null
+++ b/server/src/core/global.lua
@@ -0,0 +1,61 @@
+local mt = {}
+mt.__index = mt
+
+function mt:clearGlobal(uri)
+    self.get[uri] = nil
+    self.set[uri] = nil
+end
+
+function mt:markSet(uri, k, v)
+    local sets = self.set[uri]
+    if not sets then
+        sets = {}
+        self.set[uri] = sets
+    end
+    sets[k] = v
+end
+
+function mt:markGet(uri, k)
+    local gets = self.get[uri]
+    if not gets then
+        gets = {}
+        self.get[uri] = gets
+    end
+    gets[k] = true
+end
+
+function mt:compileVM(uri, vm)
+    self:clearGlobal(uri)
+    for k, v in next, vm.env.child do
+        local get, set
+        for _, info in ipairs(v) do
+            if info.type == 'get' then
+                get = true
+            elseif info.type == 'set' then
+                set = true
+            end
+        end
+        if set then
+            self:markSet(uri, k, v)
+        elseif get then
+            self:markGet(uri, k)
+        end
+    end
+end
+
+function mt:getGlobal(key)
+    for _, sets in pairs(self.set) do
+        local v = sets[key]
+        if v ~= nil then
+            return v
+        end
+    end
+    return nil
+end
+
+return function ()
+    return setmetatable({
+        get = {},
+        set = {},
+    }, mt)
+end