Live sync Attributes

plugin/rbx_dom_lua/EncodedValue.lua

@@ -23,8 +23,45 @@ end
 local ALL_AXES = {"X", "Y", "Z"}
 local ALL_FACES = {"Right", "Top", "Back", "Left", "Bottom", "Front"}
 
+local EncodedValue = {}
+
 local types
 types = {
+	Attributes = {
+		fromPod = function(pod)
+			local output = {}
+
+			for key, value in pairs(pod) do
+				local ok, result = EncodedValue.decode(value)
+
+				if ok then
+					output[key] = result
+				else
+					local warning = ("Could not decode attribute value of type %q: %s"):format(typeof(value), tostring(result))
+					warn(warning)
+				end
+			end
+
+			return output
+		end,
+		toPod = function(roblox)
+			local output = {}
+
+			for key, value in pairs(roblox) do
+				local ok, result = EncodedValue.encodeNaive(value)
+
+				if ok then
+					output[key] = result
+				else
+					local warning = ("Could not encode attribute value of type %q: %s"):format(typeof(value), tostring(result))
+					warn(warning)
+				end
+			end
+
+			return output
+		end,
+	},
+
 	Axes = {
 		fromPod = function(pod)
 			local axes = {}
@@ -433,8 +470,6 @@ types = {
 	},
 }
 
-local EncodedValue = {}
-
 function EncodedValue.decode(encodedValue)
 	local ty, value = next(encodedValue)
 
@@ -459,4 +494,19 @@ function EncodedValue.encode(rbxValue, propertyType)
 	}
 end
 
+local propertyTypeRenames = {
+	number = "Float64",
+	boolean = "Bool",
+	string = "String",
+}
+
+function EncodedValue.encodeNaive(rbxValue)
+	local propertyType = typeof(rbxValue)
+	if propertyTypeRenames[propertyType] ~= nil then
+		propertyType = propertyTypeRenames[propertyType]
+	end
+
+	return EncodedValue.encode(rbxValue, propertyType)
+end
+
 return EncodedValue

plugin/rbx_dom_lua/allValues.json

@@ -1,4 +1,73 @@
 {
+  "Attributes": {
+    "value": {
+      "Attributes": {
+        "TestBool": {
+          "Bool": true
+        },
+        "TestBrickColor": {
+          "BrickColor": 24
+        },
+        "TestColor3": {
+          "Color3": [
+            1.0,
+            0.5,
+            0.0
+          ]
+        },
+        "TestNumber": {
+          "Float64": 1337.0
+        },
+        "TestRect": {
+          "Rect": [
+            [
+              1.0,
+              2.0
+            ],
+            [
+              3.0,
+              4.0
+            ]
+          ]
+        },
+        "TestString": {
+          "String": "Test"
+        },
+        "TestUDim": {
+          "UDim": [
+            1.0,
+            2
+          ]
+        },
+        "TestUDim2": {
+          "UDim2": [
+            [
+              1.0,
+              2
+            ],
+            [
+              3.0,
+              4
+            ]
+          ]
+        },
+        "TestVector2": {
+          "Vector2": [
+            1.0,
+            2.0
+          ]
+        },
+        "TestVector3": {
+          "Vector3": [
+            1.0,
+            2.0,
+            3.0
+          ]
+        }
+      }
+    },
+    "ty": "Attributes"
+  },
   "Axes": {
     "value": {
       "Axes": [

plugin/rbx_dom_lua/customProperties.lua

@@ -5,6 +5,26 @@ local CollectionService = game:GetService("CollectionService")
 -- The reflection database refers to these as having scriptability = "Custom"
 return {
 	Instance = {
+		Attributes = {
+			read = function(instance)
+				return true, instance:GetAttributes()
+			end,
+			write = function(instance, _, value)
+				local existing = instance:GetAttributes()
+
+				for key, attr in pairs(value) do
+					instance:SetAttribute(key, attr)
+				end
+
+				for key in pairs(existing) do
+					if value[key] == nil then
+						instance:SetAttribute(key, nil)
+					end
+				end
+
+				return true
+			end,
+		},
 		Tags = {
 			read = function(instance)
 				return true, CollectionService:GetTags(instance)