update

systems/buff_system.gd

@@ -0,0 +1,37 @@
+extends Node
+
+func _ready() -> void:
+  EventBus.role_changed.connect(_on_role_changed)
+
+func _on_role_changed(player: Node, _role_type: int) -> void:
+  var role: Node = player.get_node_or_null("Role")
+  if not role:
+    return
+  var ability_set: AbilitySet = role.get_ability_set()
+  if not ability_set:
+    return
+  var damage_mult := 1.0
+  var heal_mult := 1.0
+  var shield_mult := 1.0
+  for ability in ability_set.abilities:
+    if ability and ability.type == Ability.Type.PASSIVE:
+      var bonus: float = ability.damage / 100.0
+      match ability.passive_stat:
+        "damage":
+          damage_mult = 1.0 + bonus
+        "heal":
+          heal_mult = 1.0 + bonus
+        "shield":
+          shield_mult = 1.0 + bonus
+  Stats.set_stat(player, "buff_damage", damage_mult)
+  Stats.set_stat(player, "buff_heal", heal_mult)
+  Stats.set_stat(player, "buff_shield", shield_mult)
+  var base: BaseStats = Stats.get_base(player)
+  if base:
+    var new_max: float = base.max_shield * shield_mult
+    Stats.set_stat(player, "max_shield", new_max)
+    var shield: float = Stats.get_stat(player, "shield")
+    shield = min(shield, new_max)
+    Stats.set_stat(player, "shield", shield)
+    EventBus.shield_changed.emit(player, shield, new_max)
+  EventBus.buff_changed.emit(player, "damage", damage_mult)