generalise card so card contents can be replaced without the need for re-parenting

src/logic-scenes/board/card.gd

@@ -9,6 +9,7 @@ var own_postits: Array[PostIt] = []
     set (value):
         if is_inside_tree() or Engine.is_editor_hint():
             $Label.text = value
+            $BackgroundSprite.frame = text.hash() % $BackgroundSprite.sprite_frames.get_frame_count($BackgroundSprite.animation)
         text = value
 @export var voice_line: AudioStream = null
 
@@ -22,12 +23,22 @@ func _ready():
     
         compatible_postits.append_array(own_postits)
         
+        if own_postits.size() == 2:
+            own_postits[0].sibling = own_postits[1]
+            own_postits[1].sibling = own_postits[0]
+        
     $BackgroundSprite.frame = randi() % $BackgroundSprite.sprite_frames.get_frame_count($BackgroundSprite.animation)
     $Label.text = self.text
 
 func _process(delta: float) -> void:
     pass
 
+func replace_with(card: Card):
+    self.text = card.text
+    self.compatible_postits = card.compatible_postits
+    self.own_postits = card.own_postits
+    self.voice_line = card.voice_line
+    
 func _on_focus_entered():
     print(self, "is focused")
 

src/logic-scenes/board/post-it.gd

@@ -2,6 +2,7 @@
 
 extends Control
 class_name PostIt
+var sibling
 
 @export var text: String = "" :
     set (value):
@@ -15,6 +16,11 @@ func _ready() -> void:
     $Label.text = self.text
     $BackgroundSprite.frame = text.hash() % $BackgroundSprite.sprite_frames.get_frame_count($BackgroundSprite.animation)
 
+func replace_with(postit: PostIt):
+    self.text = postit.text
+    self.voice_line = postit.voice_line
+    self.sibling = postit.sibling
+
 func _process(delta: float) -> void:
     pass