From 9101de49d8fbc0b1f5e067ca2cd8c5906f30e84a Mon Sep 17 00:00:00 2001
From: yexo <yexo@openttd.org>
Date: Sun, 26 Apr 2009 16:14:53 +0000
Subject: (svn r16165) -Add [FS#2801] [NoAI]: several functions to AIOrder to
 check the what kind of order an order is. -Fix: AIOrder::GetOrderDestination
 and AIOrder::GetOrderFlags didn't work on ORDER_CURRENT when the vehicle was
 loading/leaving in a station.

---
 src/ai/api/ai_order.cpp | 69 +++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 55 insertions(+), 14 deletions(-)

(limited to 'src/ai/api/ai_order.cpp')

diff --git a/src/ai/api/ai_order.cpp b/src/ai/api/ai_order.cpp
index 51ca973ca..fa397e6c0 100644
--- a/src/ai/api/ai_order.cpp
+++ b/src/ai/api/ai_order.cpp
@@ -46,6 +46,47 @@ static OrderType GetOrderTypeByTile(TileIndex t)
 	return AIVehicle::IsValidVehicle(vehicle_id) && order_position >= 0 && (order_position < ::GetVehicle(vehicle_id)->GetNumOrders() || order_position == ORDER_CURRENT);
 }
 
+/**
+ * Get the current order the vehicle is executing. If the current order is in
+ *  the order list, return the order from the orderlist. If the current order
+ *  was a manual order, return the current order.
+ */
+static const Order *ResolveOrder(VehicleID vehicle_id, AIOrder::OrderPosition order_position)
+{
+	const Vehicle *v = ::GetVehicle(vehicle_id);
+	if (order_position == AIOrder::ORDER_CURRENT) {
+		const Order *order = &v->current_order;
+		if (order->GetType() == OT_GOTO_DEPOT && !(order->GetDepotOrderType() & ODTFB_PART_OF_ORDERS)) return order;
+		order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
+		if (order_position == AIOrder::ORDER_INVALID) return NULL;
+	}
+	return ::GetVehicleOrder(v, order_position);
+}
+
+/* static */ bool AIOrder::IsGotoStationOrder(VehicleID vehicle_id, OrderPosition order_position)
+{
+	if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
+
+	const Order *order = ::ResolveOrder(vehicle_id, order_position);
+	return order != NULL && order->GetType() == OT_GOTO_STATION;
+}
+
+/* static */ bool AIOrder::IsGotoDepotOrder(VehicleID vehicle_id, OrderPosition order_position)
+{
+	if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
+
+	const Order *order = ::ResolveOrder(vehicle_id, order_position);
+	return order != NULL && order->GetType() == OT_GOTO_DEPOT;
+}
+
+/* static */ bool AIOrder::IsGotoWaypointOrder(VehicleID vehicle_id, OrderPosition order_position)
+{
+	if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
+
+	const Order *order = ::ResolveOrder(vehicle_id, order_position);
+	return order != NULL && order->GetType() == OT_GOTO_WAYPOINT;
+}
+
 /* static */ bool AIOrder::IsConditionalOrder(VehicleID vehicle_id, OrderPosition order_position)
 {
 	if (order_position == ORDER_CURRENT) return false;
@@ -55,6 +96,16 @@ static OrderType GetOrderTypeByTile(TileIndex t)
 	return order->GetType() == OT_CONDITIONAL;
 }
 
+/* static */ bool AIOrder::IsCurrentOrderPartOfOrderList(VehicleID vehicle_id)
+{
+	if (AIVehicle::IsValidVehicle(vehicle_id)) return false;
+	if (GetOrderCount(vehicle_id) == 0) return false;
+
+	const Order *order = &::GetVehicle(vehicle_id)->current_order;
+	if (order->GetType() != OT_GOTO_DEPOT) return true;
+	return (order->GetDepotOrderType() & ODTFB_PART_OF_ORDERS) != 0;
+}
+
 /* static */ AIOrder::OrderPosition AIOrder::ResolveOrderPosition(VehicleID vehicle_id, OrderPosition order_position)
 {
 	if (!AIVehicle::IsValidVehicle(vehicle_id)) return ORDER_INVALID;
@@ -114,14 +165,9 @@ static OrderType GetOrderTypeByTile(TileIndex t)
 {
 	if (!IsValidVehicleOrder(vehicle_id, order_position)) return INVALID_TILE;
 
-	const Order *order;
+	const Order *order = ::ResolveOrder(vehicle_id, order_position);
+	if (order == NULL || order->GetType() == OT_CONDITIONAL) return INVALID_TILE;
 	const Vehicle *v = ::GetVehicle(vehicle_id);
-	if (order_position == ORDER_CURRENT) {
-		order = &v->current_order;
-	} else {
-		order = ::GetVehicleOrder(GetVehicle(vehicle_id), order_position);
-		if (order->GetType() == OT_CONDITIONAL) return INVALID_TILE;
-	}
 
 	switch (order->GetType()) {
 		case OT_GOTO_DEPOT: {
@@ -163,13 +209,8 @@ static OrderType GetOrderTypeByTile(TileIndex t)
 {
 	if (!IsValidVehicleOrder(vehicle_id, order_position)) return AIOF_INVALID;
 
-	const Order *order;
-	if (order_position == ORDER_CURRENT) {
-		order = &::GetVehicle(vehicle_id)->current_order;
-	} else {
-		order = ::GetVehicleOrder(GetVehicle(vehicle_id), order_position);
-		if (order->GetType() == OT_CONDITIONAL) return AIOF_INVALID;
-	}
+	const Order *order = ::ResolveOrder(vehicle_id, order_position);
+	if (order == NULL || order->GetType() == OT_CONDITIONAL) return AIOF_INVALID;
 
 	AIOrderFlags order_flags = AIOF_NONE;
 	order_flags |= (AIOrderFlags)order->GetNonStopType();
-- 
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