local U={workspace,Players}local A={}A.__index=A local o={}local function K(A)for U,o in ipairs(U)do if A:IsDescendantOf(o)then return true end end return false end function A.FromTag(U)return o[U]end function A.Auto(U)local function o(U)local o=require(U)assert(type(o)=="\116\097\098\108\101","\069\120\112\101\099\116\101\100 \116\097\098\108\101 \102\111\114 \099\111\109\112\111\110\101\110\116")assert(type(o.Tag)=="\115\116\114\105\110\103","\069\120\112\101\099\116\101\100 \046\084\097\103 \112\114\111\112\101\114\116\121")A.new(o.Tag,o,o.RenderPriority)end for U,A in ipairs(U:GetDescendants())do if A:IsA("\077\111\100\117\108\101\083\099\114\105\112\116")then o(A)end end U.DescendantAdded:Connect(function(U)if U:IsA("\077\111\100\117\108\101\083\099\114\105\112\116")then o(U)end end)end function A.new(U,B,x)assert(type(U)=="\115\116\114\105\110\103","\065\114\103\117\109\101\110\116 \035\049 \040\116\097\103\041 \115\104\111\117\108\100 \098\101 \097 \115\116\114\105\110\103\059 \103\111\116 "..type(U))assert(type(B)=="\116\097\098\108\101","\065\114\103\117\109\101\110\116 \035\050 \040\099\108\097\115\115\041 \115\104\111\117\108\100 \098\101 \097 \116\097\098\108\101\059 \103\111\116 "..type(B))assert(type(B.new)=="\102\117\110\099\116\105\111\110","\067\108\097\115\115 \109\117\115\116 \099\111\110\116\097\105\110 \097 \046\110\101\119 \099\111\110\115\116\114\117\099\116\111\114 \102\117\110\099\116\105\111\110")assert(type(B.Destroy)=="\102\117\110\099\116\105\111\110","\067\108\097\115\115 \109\117\115\116 \099\111\110\116\097\105\110 \097 \058\068\101\115\116\114\111\121 \102\117\110\099\116\105\111\110")assert(o[U]==nil,"\067\111\109\112\111\110\101\110\116 \097\108\114\101\097\100\121 \098\111\117\110\100 \116\111 \116\104\105\115 \116\097\103")local S=setmetatable({},A)S.Added=Signal.new()S.Removed=Signal.new()S._maid=Maid.new()S._lifecycleMaid=Maid.new()S._tag=U S._class=B S._objects={}S._instancesToObjects={}S._hasHeartbeatUpdate=type(B.HeartbeatUpdate)=="\102\117\110\099\116\105\111\110"S._hasSteppedUpdate=type(B.SteppedUpdate)=="\102\117\110\099\116\105\111\110"S._hasRenderUpdate=type(B.RenderUpdate)=="\102\117\110\099\116\105\111\110"S._hasInit=type(B.Init)=="\102\117\110\099\116\105\111\110"S._hasDeinit=type(B.Deinit)=="\102\117\110\099\116\105\111\110"S._renderPriority=x or Enum.RenderPriority.Last.Value S._lifecycle=false S._nextId=0 S._maid:GiveTask((CollectionService:GetInstanceAddedSignal(U)):Connect(function(U)if K(U)then S:_instanceAdded(U)end end))S._maid:GiveTask((CollectionService:GetInstanceRemovedSignal(U)):Connect(function(U)S:_instanceRemoved(U)end))S._maid:GiveTask(S._lifecycleMaid)do local A=Instance.new("\066\105\110\100\097\098\108\101\069\118\101\110\116")for U,o in ipairs(CollectionService:GetTagged(U))do if K(o)then local U=A.Event:Connect(function()S:_instanceAdded(o)end)A:Fire()U:Disconnect()end end A:Destroy()end o[U]=S S._maid:GiveTask(function()o[U]=nil end)return S end function A._startHeartbeatUpdate(U)local A=U._objects U._heartbeatUpdate=RunService.Heartbeat:Connect(function(U)for A,o in ipairs(A)do o:HeartbeatUpdate(U)end end)U._lifecycleMaid:GiveTask(U._heartbeatUpdate)end function A._startSteppedUpdate(U)local A=U._objects U._steppedUpdate=RunService.Stepped:Connect(function(U,o)for U,A in ipairs(A)do A:SteppedUpdate(o)end end)U._lifecycleMaid:GiveTask(U._steppedUpdate)end function A._startRenderUpdate(U)local A=U._objects U._renderName=U._tag.."\082\101\110\100\101\114\085\112\100\097\116\101"RunService:BindToRenderStep(U._renderName,U._renderPriority,function(U)for A,o in ipairs(A)do o:RenderUpdate(U)end end)U._lifecycleMaid:GiveTask(function()RunService:UnbindFromRenderStep(U._renderName)end)end function A._startLifecycle(U)U._lifecycle=true if U._hasHeartbeatUpdate then U:_startHeartbeatUpdate()end if U._hasSteppedUpdate then U:_startSteppedUpdate()end if U._hasRenderUpdate then U:_startRenderUpdate()end end function A._stopLifecycle(U)U._lifecycle=false U._lifecycleMaid:DoCleaning()end function A._instanceAdded(A,U)if A._instancesToObjects[U]then return end if not A._lifecycle then A:_startLifecycle()end A._nextId=A._nextId+1 local o=A._tag..tostring(A._nextId)if IS_SERVER then U:SetAttribute(ATTRIBUTE_ID_NAME,o)end local K=A._class.new(U)K.Instance=U K._id=o A._instancesToObjects[U]=K table.insert(A._objects,K)if A._hasInit then Thread.Spawn(function()if A._instancesToObjects[U]~=K then return end K:Init()end)end A.Added:Fire(K)return K end function A._instanceRemoved(A,U)A._instancesToObjects[U]=nil for o,K in ipairs(A._objects)do if K.Instance==U then if A._hasDeinit then K:Deinit()end if IS_SERVER and(U.Parent and U:GetAttribute(ATTRIBUTE_ID_NAME)~=nil)then U:SetAttribute(ATTRIBUTE_ID_NAME,nil)end A.Removed:Fire(K)K:Destroy()K._destroyed=true TableUtil.FastRemove(A._objects,o)break end end if#A._objects==0 and A._lifecycle then A:_stopLifecycle()end end function A.GetAll(U)return TableUtil.CopyShallow(U._objects)end function A.GetFromInstance(A,U)return A._instancesToObjects[U]end function A.GetFromID(A,U)for A,o in ipairs(A._objects)do if o._id==U then return o end end return nil end function A.Filter(A,U)return TableUtil.Filter(A._objects,U)end function A.WaitFor(o,U,A)local K=type(U)=="\115\116\114\105\110\103"local function B(A)return K and A.Instance.Name==U or not K and A.Instance==U end for U,A in ipairs(o._objects)do if B(A)then return Promise.Resolve(A)end end local x=nil return((Promise.FromEvent(o.Added,function(U)x=U return B(U)end)):Then(function()return x end)):Timeout(A or DEFAULT_WAIT_FOR_TIMEOUT)end function A.Destroy(U)U._maid:Destroy()end return A
-- Components will only work on instances parented under these descendants:
local DESCENDANT_WHITELIST = { workspace, Players }

local Component = {}
Component.__index = Component

local componentsByTag = {}

local function IsDescendantOfWhitelist(instance)
	for _, v in ipairs(DESCENDANT_WHITELIST) do
		if instance:IsDescendantOf(v) then
			return true
		end
	end
	return false
end

function Component.FromTag(tag)
	return componentsByTag[tag]
end

function Component.Auto(folder)
	local function Setup(moduleScript)
		local m = require(moduleScript)
		assert(type(m) == "table", "Expected table for component")
		assert(type(m.Tag) == "string", "Expected .Tag property")
		Component.new(m.Tag, m, m.RenderPriority)
	end
	for _, v in ipairs(folder:GetDescendants()) do
		if v:IsA("ModuleScript") then
			Setup(v)
		end
	end
	folder.DescendantAdded:Connect(function(v)
		if v:IsA("ModuleScript") then
			Setup(v)
		end
	end)
end

function Component.new(tag, class, renderPriority)
	assert(type(tag) == "string", "Argument #1 (tag) should be a string; got " .. type(tag))
	assert(type(class) == "table", "Argument #2 (class) should be a table; got " .. type(class))
	assert(type(class.new) == "function", "Class must contain a .new constructor function")
	assert(type(class.Destroy) == "function", "Class must contain a :Destroy function")
	assert(componentsByTag[tag] == nil, "Component already bound to this tag")

	local self = setmetatable({}, Component)

	self.Added = Signal.new()
	self.Removed = Signal.new()

	self._maid = Maid.new()
	self._lifecycleMaid = Maid.new()
	self._tag = tag
	self._class = class
	self._objects = {}
	self._instancesToObjects = {}
	self._hasHeartbeatUpdate = (type(class.HeartbeatUpdate) == "function")
	self._hasSteppedUpdate = (type(class.SteppedUpdate) == "function")
	self._hasRenderUpdate = (type(class.RenderUpdate) == "function")
	self._hasInit = (type(class.Init) == "function")
	self._hasDeinit = (type(class.Deinit) == "function")
	self._renderPriority = renderPriority or Enum.RenderPriority.Last.Value
	self._lifecycle = false
	self._nextId = 0

	self._maid:GiveTask(CollectionService:GetInstanceAddedSignal(tag):Connect(function(instance)
		if IsDescendantOfWhitelist(instance) then
			self:_instanceAdded(instance)
		end
	end))

	self._maid:GiveTask(CollectionService:GetInstanceRemovedSignal(tag):Connect(function(instance)
		self:_instanceRemoved(instance)
	end))

	self._maid:GiveTask(self._lifecycleMaid)

	do
		local b = Instance.new("BindableEvent")
		for _, instance in ipairs(CollectionService:GetTagged(tag)) do
			if IsDescendantOfWhitelist(instance) then
				local c = b.Event:Connect(function()
					self:_instanceAdded(instance)
				end)
				b:Fire()
				c:Disconnect()
			end
		end
		b:Destroy()
	end

	componentsByTag[tag] = self
	self._maid:GiveTask(function()
		componentsByTag[tag] = nil
	end)

	return self
end

function Component:_startHeartbeatUpdate()
	local all = self._objects
	self._heartbeatUpdate = RunService.Heartbeat:Connect(function(dt)
		for _, v in ipairs(all) do
			v:HeartbeatUpdate(dt)
		end
	end)
	self._lifecycleMaid:GiveTask(self._heartbeatUpdate)
end

function Component:_startSteppedUpdate()
	local all = self._objects
	self._steppedUpdate = RunService.Stepped:Connect(function(_, dt)
		for _, v in ipairs(all) do
			v:SteppedUpdate(dt)
		end
	end)
	self._lifecycleMaid:GiveTask(self._steppedUpdate)
end

function Component:_startRenderUpdate()
	local all = self._objects
	self._renderName = (self._tag .. "RenderUpdate")
	RunService:BindToRenderStep(self._renderName, self._renderPriority, function(dt)
		for _, v in ipairs(all) do
			v:RenderUpdate(dt)
		end
	end)
	self._lifecycleMaid:GiveTask(function()
		RunService:UnbindFromRenderStep(self._renderName)
	end)
end

function Component:_startLifecycle()
	self._lifecycle = true
	if self._hasHeartbeatUpdate then
		self:_startHeartbeatUpdate()
	end
	if self._hasSteppedUpdate then
		self:_startSteppedUpdate()
	end
	if self._hasRenderUpdate then
		self:_startRenderUpdate()
	end
end

function Component:_stopLifecycle()
	self._lifecycle = false
	self._lifecycleMaid:DoCleaning()
end

function Component:_instanceAdded(instance)
	if self._instancesToObjects[instance] then
		return
	end
	if not self._lifecycle then
		self:_startLifecycle()
	end
	self._nextId = (self._nextId + 1)
	local id = (self._tag .. tostring(self._nextId))
	if IS_SERVER then
		instance:SetAttribute(ATTRIBUTE_ID_NAME, id)
	end
	local obj = self._class.new(instance)
	obj.Instance = instance
	obj._id = id
	self._instancesToObjects[instance] = obj
	table.insert(self._objects, obj)
	if self._hasInit then
		Thread.Spawn(function()
			if self._instancesToObjects[instance] ~= obj then
				return
			end
			obj:Init()
		end)
	end
	self.Added:Fire(obj)
	return obj
end

function Component:_instanceRemoved(instance)
	self._instancesToObjects[instance] = nil
	for i, obj in ipairs(self._objects) do
		if obj.Instance == instance then
			if self._hasDeinit then
				obj:Deinit()
			end
			if IS_SERVER and instance.Parent and instance:GetAttribute(ATTRIBUTE_ID_NAME) ~= nil then
				instance:SetAttribute(ATTRIBUTE_ID_NAME, nil)
			end
			self.Removed:Fire(obj)
			obj:Destroy()
			obj._destroyed = true
			TableUtil.FastRemove(self._objects, i)
			break
		end
	end
	if #self._objects == 0 and self._lifecycle then
		self:_stopLifecycle()
	end
end

function Component:GetAll()
	return TableUtil.CopyShallow(self._objects)
end

function Component:GetFromInstance(instance)
	return self._instancesToObjects[instance]
end

function Component:GetFromID(id)
	for _, v in ipairs(self._objects) do
		if v._id == id then
			return v
		end
	end
	return nil
end

function Component:Filter(filterFunc)
	return TableUtil.Filter(self._objects, filterFunc)
end

function Component:WaitFor(instance, timeout)
	local isName = (type(instance) == "string")
	local function IsInstanceValid(obj)
		return ((isName and obj.Instance.Name == instance) or ((not isName) and obj.Instance == instance))
	end
	for _, obj in ipairs(self._objects) do
		if IsInstanceValid(obj) then
			return Promise.Resolve(obj)
		end
	end
	local lastObj = nil
	return Promise.FromEvent(self.Added, function(obj)
		lastObj = obj
		return IsInstanceValid(obj)
	end)
		:Then(function()
			return lastObj
		end)
		:Timeout(timeout or DEFAULT_WAIT_FOR_TIMEOUT)
end

function Component:Destroy()
	self._maid:Destroy()
end

return Component
