feat: add knowledge-gated pantry opportunities

simulation/knowledge/EventKnowledgeSystem.gd

@@ -9,7 +9,7 @@ var known_events: Dictionary = {}
 
 func observe_event(event: EconomicEventRecord, npcs: Array[SimNPC]) -> Array[KnownEventStateRecord]:
 	var learned: Array[KnownEventStateRecord] = []
-	if not _is_witnessable(event):
+	if not is_knowable_event(event):
 		return learned
 	var actor := _find_npc(int(event.data["actor_id"]), npcs)
 	if actor == null:
@@ -44,7 +44,7 @@ func communicate_event(
 		event == null
 		or speaker_id == listener_id
 		or listener_id == int(event.data["actor_id"])
-		or not _is_witnessable(event)
+		or not is_knowable_event(event)
 	):
 		return null
 	var event_id := int(event.data["event_id"])
@@ -221,11 +221,21 @@ func _remember(
 	return record
 
 
-func _is_witnessable(event: EconomicEventRecord) -> bool:
+static func is_knowable_event(event: EconomicEventRecord) -> bool:
+	if event == null or float(event.data["amount"]) <= 0.0:
+		return false
+	var event_type := StringName(event.data["event_type"])
+	var item_id := StringName(event.data["item_id"])
+	if event_type == SimulationIds.EVENT_STORAGE_DEPOSITED:
+		return item_id == SimulationIds.RESOURCE_FOOD
+	if event_type != SimulationIds.EVENT_STORAGE_WITHDRAWN:
+		return false
+	var actor_id := int(event.data["actor_id"])
 	return (
-		StringName(event.data["event_type"]) == SimulationIds.EVENT_STORAGE_DEPOSITED
-		and StringName(event.data["item_id"]) == SimulationIds.RESOURCE_FOOD
-		and float(event.data["amount"]) > 0.0
+		actor_id >= 0
+		and item_id == SimulationIds.RESOURCE_FOOD
+		and StringName(event.data["source_id"]) == SimulationIds.STORAGE_VILLAGE_PANTRY
+		and (StringName(event.data["destination_id"]) == SimulationIds.npc_inventory_id(actor_id))
 	)