rename everything to .luau extension

src/shared/Tween.luau

@@ -0,0 +1,78 @@
+--!optimize 2
+--!native
+--!strict
+
+--Weird type hack for allowing more than 1 property to be defined inside a tween
+--Couldnt get type packs working
+type TweenAnimation<T,U> = {
+    [string]: T | U --I hate "any"
+}
+
+type ClassConstructor<T,U> = typeof(setmetatable({} :: Constructor_Return_Props<T,U>, {} :: Impl_Constructor))
+type Impl_Constructor = {
+	__index: Impl_Constructor,
+	constructor: Constructor_Fun,
+	--Class functions
+	Start: <T,U>(self: ClassConstructor<T,U>, PostInstance: Instance?, PostProperties: TweenAnimation<T,U>?, PostTweenSettings: TweenInfo?) -> Tween,
+}
+
+type Constructor_Fun = <T,U>(TweenSettings: TweenInfo?, Object: Instance?, PreProperties: TweenAnimation<T,U>?) -> ClassConstructor<T,U>
+type Constructor_Return_Props<T,U> = {
+	TweenInfo:     TweenInfo?,
+	Instance:      Instance?,
+	PreProperties: TweenAnimation<T,U>?,
+}
+
+export type TweenClass<T,U> = ClassConstructor<T,U>
+export type TweenConstructor = Impl_Constructor
+
+local Tween = {} :: Impl_Constructor
+Tween.__index = Tween
+
+local TS = game:GetService("TweenService")
+
+function Tween.constructor(TweenSettings, Object, PreProperties)
+    return setmetatable({
+        TweenInfo     = TweenSettings,
+        Instance      = Object,
+        PreProperties = PreProperties
+    }, Tween)
+end
+
+function Tween:Start<T,U>(PostInstance, PostProperties, PostTweenSettings)
+    local Props         = self.PreProperties
+    local Object        = self.Instance
+    local TweenSettings = self.TweenInfo
+
+    if PostProperties then
+        if self.PreProperties then
+            if Props then
+                warn("Tween library: Combining PostProperties and PreProperties together", debug.traceback())
+                for tween_prop, tween_value in PostProperties do
+                    Props[tween_prop] = tween_value
+                end
+            end
+        else
+            Props = PostProperties
+        end
+    end
+    if PostInstance then
+        if Object then
+            warn("Tween library: Overwriting an already defined animating object old=", Object, "new=", PostInstance, debug.traceback())
+        end
+        Object = PostInstance
+    end
+    if PostTweenSettings then
+        if TweenSettings then
+            warn("Tween library: Overwriting already defined Tween settings", debug.traceback())
+        end
+        TweenSettings = PostTweenSettings
+    end
+
+    local Animation = TS:Create(Object, TweenSettings, Props)
+    Animation:Play()
+
+    return Animation
+end
+
+return Tween