feat(tweenmanager): add a switch system

sonic-radiance.love/game/modules/tweenmanager/init.lua

@@ -7,7 +7,7 @@ function TweenManager:new(subject)
   self.timer    = 0
 
   self.tweens   = {}
-  self.targets  = {}
+  self.switches = {}
 end
 
 function TweenManager:newTween(start, duration, target, easing)
@@ -20,6 +20,16 @@ function TweenManager:newTween(start, duration, target, easing)
   table.insert(self.tweens, newTween)
 end
 
+function TweenManager:newSwitch(start, bools)
+  local newSwitch = {}
+  -- we add the data into a tween wrapper
+  newSwitch.bools = bools
+  newSwitch.start = self.timer + start -- /!\ START IS RELATIVE TO CURRENT TIME
+  newSwitch.clear = newSwitch.start + 1
+
+  table.insert(self.switches, newSwitch)
+end
+
 function TweenManager:update(dt)
   self.timer = self.timer + dt
 
@@ -29,6 +39,22 @@ function TweenManager:update(dt)
     end
   end
 
+  for i, switch in ipairs(self.switches) do
+    if (self.timer > switch.start) then
+      -- We test each boolean in the switch
+      for i, bool in ipairs(switch.bools) do
+        -- if it's nil, we set it to true
+        if self.subject[bool] == nil then
+          self.subject[bool] = true
+        else
+          -- if it's not nil, we reverse the boolean
+          self.subject[bool] = (self.subject[bool] == false)
+        end
+      end
+      table.remove(self.switches, i)
+    end
+  end
+
   self:clearEndedTweens()
 end