merge impl-v2: plugin

plugin/src/Session.lua

@@ -0,0 +1,76 @@
+local Config = require(script.Parent.Config)
+local ApiContext = require(script.Parent.ApiContext)
+
+local REMOTE_URL = ("http://localhost:%d"):format(Config.port)
+
+local Session = {}
+Session.__index = Session
+
+function Session.new()
+	local self = {}
+
+	setmetatable(self, Session)
+
+	-- TODO: Rewrite all instance tracking logic and implement a real reconciler
+	local created = {}
+	created["0"] = game:GetService("ReplicatedFirst")
+
+	local api
+	local function readAll()
+		print("Reading all...")
+
+		return api:readAll()
+			:andThen(function(instances)
+				local visited = {}
+				for id, instance in pairs(instances) do
+					visited[id] = true
+					if id ~= "0" then
+						local existing = created[id]
+						if existing ~= nil then
+							pcall(existing.Destroy, existing)
+						end
+
+						local real = Instance.new(instance.className)
+						real.Name = instance.name
+
+						for key, value in pairs(instance.properties) do
+							real[key] = value
+						end
+
+						created[id] = real
+					end
+				end
+
+				for id, instance in pairs(instances) do
+					if id ~= "0" then
+						created[id].Parent = created[tostring(instance.parent)]
+					end
+				end
+
+				for id, object in pairs(created) do
+					if not visited[id] then
+						object:Destroy()
+					end
+				end
+			end)
+	end
+
+	api = ApiContext.new(REMOTE_URL, function(message)
+		if message.type == "InstanceChanged" then
+			print("Instance", message.id, "changed!")
+			readAll()
+		else
+			warn("Unknown message type " .. message.type)
+		end
+	end)
+
+	api:connect()
+		:andThen(readAll)
+		:andThen(function()
+			return api:retrieveMessages()
+		end)
+
+	return self
+end
+
+return Session