(svn r18518) -Add [NoAI]: AIOrder::AIOF_GOTO_NEAREST_DEPOT for goto nearest depot orders

4 files changed, 22 insertions, 10 deletions

diff --git a/src/ai/api/ai_changelog.hpp b/src/ai/api/ai_changelog.hpp
index 309fa681d..78721ed0c 100644
--- a/src/ai/api/ai_changelog.hpp
+++ b/src/ai/api/ai_changelog.hpp
@@ -23,6 +23,7 @@
  * \li AIBuoyList
  * \li AIEventCompanyAskMerger
  * \li AIIndustry::GetLastMonthTransportedPercentage
+ * \li AIOrder::AIOF_GOTO_NEAREST_DEPOT
  * \li AIRail::RemoveRailStationTileRectangle
  * \li AIRail::RemoveRailWaypointTileRectangle
  * \li AISubsidy::SubsidyParticipantType
diff --git a/src/ai/api/ai_order.cpp b/src/ai/api/ai_order.cpp
index fba80ec59..92c9e5dc0 100644
--- a/src/ai/api/ai_order.cpp
+++ b/src/ai/api/ai_order.cpp
@@ -120,7 +120,8 @@ static const Order *ResolveOrder(VehicleID vehicle_id, AIOrder::OrderPosition or
 
 /* static */ bool AIOrder::AreOrderFlagsValid(TileIndex destination, AIOrderFlags order_flags)
 {
-	switch (::GetOrderTypeByTile(destination)) {
+	OrderType ot = (order_flags & AIOF_GOTO_NEAREST_DEPOT) ? OT_GOTO_DEPOT : ::GetOrderTypeByTile(destination);
+	switch (ot) {
 		case OT_GOTO_STATION:
 			return (order_flags & ~(AIOF_NON_STOP_FLAGS | AIOF_UNLOAD_FLAGS | AIOF_LOAD_FLAGS)) == 0 &&
 					/* Test the different mutual exclusive flags. */
@@ -221,6 +222,7 @@ static const Order *ResolveOrder(VehicleID vehicle_id, AIOrder::OrderPosition or
 		case OT_GOTO_DEPOT:
 			if (order->GetDepotOrderType() & ODTFB_SERVICE) order_flags |= AIOF_SERVICE_IF_NEEDED;
 			if (order->GetDepotActionType() & ODATFB_HALT) order_flags |= AIOF_STOP_IN_DEPOT;
+			if (order->GetDepotActionType() & ODATFB_NEAREST_DEPOT) order_flags |= AIOF_GOTO_NEAREST_DEPOT;
 			break;
 
 		case OT_GOTO_STATION:
@@ -335,19 +337,25 @@ static const Order *ResolveOrder(VehicleID vehicle_id, AIOrder::OrderPosition or
 	EnforcePrecondition(false, AreOrderFlagsValid(destination, order_flags));
 
 	Order order;
-	switch (::GetOrderTypeByTile(destination)) {
+	OrderType ot = (order_flags & AIOF_GOTO_NEAREST_DEPOT) ? OT_GOTO_DEPOT : ::GetOrderTypeByTile(destination);
+	switch (ot) {
 		case OT_GOTO_DEPOT: {
 			OrderDepotTypeFlags odtf = (OrderDepotTypeFlags)(ODTFB_PART_OF_ORDERS | ((order_flags & AIOF_SERVICE_IF_NEEDED) ? ODTFB_SERVICE : 0));
 			OrderDepotActionFlags odaf = (OrderDepotActionFlags)(ODATF_SERVICE_ONLY | ((order_flags & AIOF_STOP_IN_DEPOT) ? ODATFB_HALT : 0));
+			if (order_flags & AIOF_GOTO_NEAREST_DEPOT) odaf |= ODATFB_NEAREST_DEPOT;
 			OrderNonStopFlags onsf = (OrderNonStopFlags)((order_flags & AIOF_NON_STOP_INTERMEDIATE) ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
-			/* Check explicitly if the order is to a station (for aircraft) or
-			 * to a depot (other vehicle types). */
-			if (::Vehicle::Get(vehicle_id)->type == VEH_AIRCRAFT) {
-				if (!::IsTileType(destination, MP_STATION)) return false;
-				order.MakeGoToDepot(::GetStationIndex(destination), odtf, onsf, odaf);
+			if (order_flags & AIOF_GOTO_NEAREST_DEPOT) {
+				order.MakeGoToDepot(0, odtf, onsf, odaf);
 			} else {
-				if (::IsTileType(destination, MP_STATION)) return false;
-				order.MakeGoToDepot(::GetDepotIndex(destination), odtf, onsf, odaf);
+				/* Check explicitly if the order is to a station (for aircraft) or
+				 * to a depot (other vehicle types). */
+				if (::Vehicle::Get(vehicle_id)->type == VEH_AIRCRAFT) {
+					if (!::IsTileType(destination, MP_STATION)) return false;
+					order.MakeGoToDepot(::GetStationIndex(destination), odtf, onsf, odaf);
+				} else {
+					if (::IsTileType(destination, MP_STATION)) return false;
+					order.MakeGoToDepot(::GetDepotIndex(destination), odtf, onsf, odaf);
+				}
 			}
 			break;
 		}
diff --git a/src/ai/api/ai_order.hpp b/src/ai/api/ai_order.hpp
index 76e475f27..a0dd69bd8 100644
--- a/src/ai/api/ai_order.hpp
+++ b/src/ai/api/ai_order.hpp
@@ -66,6 +66,8 @@ public:
 		AIOF_SERVICE_IF_NEEDED = 1 << 2,
 		/** Stop in the depot instead of only go there for servicing; only for depots. */
 		AIOF_STOP_IN_DEPOT     = 1 << 3,
+		/** Go to nearest depot. */
+		AIOF_GOTO_NEAREST_DEPOT = 1 << 4,
 
 		/** All flags related to non-stop settings. */
 		AIOF_NON_STOP_FLAGS    = AIOF_NON_STOP_INTERMEDIATE | AIOF_NON_STOP_DESTINATION,
@@ -74,7 +76,7 @@ public:
 		/** All flags related to loading. */
 		AIOF_LOAD_FLAGS        = AIOF_FULL_LOAD | AIOF_FULL_LOAD_ANY | AIOF_NO_LOAD,
 		/** All flags related to depots. */
-		AIOF_DEPOT_FLAGS       = AIOF_SERVICE_IF_NEEDED | AIOF_STOP_IN_DEPOT,
+		AIOF_DEPOT_FLAGS       = AIOF_SERVICE_IF_NEEDED | AIOF_STOP_IN_DEPOT | AIOF_GOTO_NEAREST_DEPOT,
 
 		/** For marking invalid order flags */
 		AIOF_INVALID           = 0xFFFF,
diff --git a/src/ai/api/ai_order.hpp.sq b/src/ai/api/ai_order.hpp.sq
index 3d8cefefd..53fa61e4e 100644
--- a/src/ai/api/ai_order.hpp.sq
+++ b/src/ai/api/ai_order.hpp.sq
@@ -52,6 +52,7 @@ void SQAIOrder_Register(Squirrel *engine)
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_NO_LOAD,                                     "AIOF_NO_LOAD");
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_SERVICE_IF_NEEDED,                           "AIOF_SERVICE_IF_NEEDED");
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_STOP_IN_DEPOT,                               "AIOF_STOP_IN_DEPOT");
+	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_GOTO_NEAREST_DEPOT,                          "AIOF_GOTO_NEAREST_DEPOT");
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_NON_STOP_FLAGS,                              "AIOF_NON_STOP_FLAGS");
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_UNLOAD_FLAGS,                                "AIOF_UNLOAD_FLAGS");
 	SQAIOrder.DefSQConst(engine, AIOrder::AIOF_LOAD_FLAGS,                                  "AIOF_LOAD_FLAGS");