Add: Siren templates in chapter BD

campaign/event_20220915_cn/campaign_base.py

@@ -0,0 +1,14 @@
+from module.base.utils import get_color, red_overlay_transparency
+from module.campaign.campaign_base import CampaignBase as CampaignBase_
+from module.handler.assets import MAP_ENEMY_SEARCHING
+from module.map.assets import SWITCH_OVER
+
+
+class CampaignBase(CampaignBase_):
+    def enemy_searching_appear(self):
+        if not self.appear(SWITCH_OVER, offset=(20, 20)):
+            return False
+
+        return red_overlay_transparency(
+            MAP_ENEMY_SEARCHING.color, get_color(self.device.image, MAP_ENEMY_SEARCHING.area)
+        ) > self.MAP_ENEMY_SEARCHING_OVERLAY_TRANSPARENCY_THRESHOLD