Load two units per cargo plane.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1029

game/debriefing.py

@@ -24,7 +24,7 @@ from game import db
 from game.theater import Airfield, ControlPoint
 from game.transfers import CargoShip
 from game.unitmap import (
-    AirliftUnit,
+    AirliftUnits,
     Building,
     ConvoyUnit,
     FrontLineUnit,
@@ -75,8 +75,8 @@ class GroundLosses:
     player_cargo_ships: List[CargoShip] = field(default_factory=list)
     enemy_cargo_ships: List[CargoShip] = field(default_factory=list)
 
-    player_airlifts: List[AirliftUnit] = field(default_factory=list)
-    enemy_airlifts: List[AirliftUnit] = field(default_factory=list)
+    player_airlifts: List[AirliftUnits] = field(default_factory=list)
+    enemy_airlifts: List[AirliftUnits] = field(default_factory=list)
 
     player_ground_objects: List[GroundObjectUnit] = field(default_factory=list)
     enemy_ground_objects: List[GroundObjectUnit] = field(default_factory=list)
@@ -160,7 +160,7 @@ class Debriefing:
         yield from self.ground_losses.enemy_cargo_ships
 
     @property
-    def airlift_losses(self) -> Iterator[AirliftUnit]:
+    def airlift_losses(self) -> Iterator[AirliftUnits]:
         yield from self.ground_losses.player_airlifts
         yield from self.ground_losses.enemy_airlifts
 
@@ -220,7 +220,8 @@ class Debriefing:
         else:
             losses = self.ground_losses.enemy_airlifts
         for loss in losses:
-            losses_by_type[loss.unit_type] += 1
+            for unit_type in loss.cargo:
+                losses_by_type[unit_type] += 1
         return losses_by_type
 
     def building_losses_by_type(self, player: bool) -> Dict[str, int]:

game/event/event.py

@@ -202,19 +202,17 @@ class Event:
     @staticmethod
     def commit_airlift_losses(debriefing: Debriefing) -> None:
         for loss in debriefing.airlift_losses:
-            unit_type = loss.unit_type
             transfer = loss.transfer
-            available = loss.transfer.units.get(unit_type, 0)
             airlift_name = f"airlift from {transfer.origin} to {transfer.destination}"
-            if available <= 0:
-                logging.error(
-                    f"Found killed {unit_type} in {airlift_name} but that airlift has "
-                    "none available."
-                )
-                continue
-
-            logging.info(f"{unit_type} destroyed in {airlift_name}")
+            for unit_type in loss.cargo:
+                try:
                     transfer.kill_unit(unit_type)
+                    logging.info(f"{unit_type} destroyed in {airlift_name}")
+                except KeyError:
+                    logging.exception(
+                        f"Found killed {unit_type} in {airlift_name} but that airlift "
+                        "has none available."
+                    )
 
     @staticmethod
     def commit_ground_object_losses(debriefing: Debriefing) -> None:

game/transfers.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import logging
+import math
 from collections import defaultdict
 from dataclasses import dataclass, field
 from functools import singledispatchmethod
@@ -89,10 +90,9 @@ class TransferOrder:
         self.units.clear()
 
     def kill_unit(self, unit_type: Type[VehicleType]) -> None:
-        if unit_type in self.units:
+        if unit_type not in self.units or not self.units[unit_type]:
+            raise KeyError(f"{self.destination} has no {unit_type} remaining")
         self.units[unit_type] -= 1
-            return
-        raise KeyError
 
     @property
     def size(self) -> int:
@@ -254,11 +254,13 @@ class AirliftPlanner:
         self, squadron: Squadron, inventory: ControlPointAircraftInventory
     ) -> int:
         available = inventory.available(squadron.aircraft)
-        # 4 is the max flight size in DCS.
-        flight_size = min(self.transfer.size, available, 4)
+        capacity_each = 1 if squadron.aircraft.helicopter else 2
+        required = math.ceil(self.transfer.size / capacity_each)
+        flight_size = min(required, available, squadron.aircraft.group_size_max)
+        capacity = flight_size * capacity_each
 
-        if flight_size < self.transfer.size:
-            transfer = self.game.transfers.split_transfer(self.transfer, flight_size)
+        if capacity < self.transfer.size:
+            transfer = self.game.transfers.split_transfer(self.transfer, capacity)
         else:
             transfer = self.transfer
 

game/unitmap.py

@@ -1,4 +1,6 @@
 """Maps generated units back to their Liberation types."""
+import itertools
+import math
 from dataclasses import dataclass
 from typing import Dict, Optional, Type
 
@@ -40,8 +42,8 @@ class ConvoyUnit:
 
 
 @dataclass(frozen=True)
-class AirliftUnit:
-    unit_type: Type[VehicleType]
+class AirliftUnits:
+    cargo: tuple[Type[VehicleType], ...]
     transfer: TransferOrder
 
 
@@ -59,7 +61,7 @@ class UnitMap:
         self.buildings: Dict[str, Building] = {}
         self.convoys: Dict[str, ConvoyUnit] = {}
         self.cargo_ships: Dict[str, CargoShip] = {}
-        self.airlifts: Dict[str, AirliftUnit] = {}
+        self.airlifts: Dict[str, AirliftUnits] = {}
 
     def add_aircraft(self, group: FlyingGroup, flight: Flight) -> None:
         for pilot, unit in zip(flight.roster.pilots, group.units):
@@ -177,15 +179,26 @@ class UnitMap:
         return self.cargo_ships.get(name, None)
 
     def add_airlift_units(self, group: FlyingGroup, transfer: TransferOrder) -> None:
-        for transport, cargo_type in zip(group.units, transfer.iter_units()):
+        capacity_each = math.ceil(transfer.size / len(group.units))
+        for idx, transport in enumerate(group.units):
+            # Slice the units in groups based on the capacity of each unit. Cargo is
+            # assigned arbitrarily to units in the order of the group. The last unit in
+            # the group will receive a partial load if there is not enough cargo to fill
+            # every transport.
+            base_idx = idx * capacity_each
+            cargo = tuple(
+                itertools.islice(
+                    transfer.iter_units(), base_idx, base_idx + capacity_each
+                )
+            )
             # The actual name is a String (the pydcs translatable string), which
             # doesn't define __eq__.
             name = str(transport.name)
             if name in self.airlifts:
                 raise RuntimeError(f"Duplicate airlift unit: {name}")
-            self.airlifts[name] = AirliftUnit(cargo_type, transfer)
+            self.airlifts[name] = AirliftUnits(cargo, transfer)
 
-    def airlift_unit(self, name: str) -> Optional[AirliftUnit]:
+    def airlift_unit(self, name: str) -> Optional[AirliftUnits]:
         return self.airlifts.get(name, None)
 
     def add_building(self, ground_object: BuildingGroundObject, group: Group) -> None:

qt_ui/windows/QWaitingForMissionResultWindow.py

@@ -133,10 +133,10 @@ class QWaitingForMissionResultWindow(QDialog):
         self.setLayout(self.layout)
 
     @staticmethod
-    def add_update_row(description: str, count: Sized, layout: QGridLayout) -> None:
+    def add_update_row(description: str, count: int, layout: QGridLayout) -> None:
         row = layout.rowCount()
         layout.addWidget(QLabel(f"<b>{description}</b>"), row, 0)
-        layout.addWidget(QLabel(f"{len(count)}"), row, 1)
+        layout.addWidget(QLabel(f"{count}"), row, 1)
 
     def updateLayout(self, debriefing: Debriefing) -> None:
         updateBox = QGroupBox("Mission status")
@@ -145,34 +145,36 @@ class QWaitingForMissionResultWindow(QDialog):
         self.debriefing = debriefing
 
         self.add_update_row(
-            "Aircraft destroyed", list(debriefing.air_losses.losses), update_layout
+            "Aircraft destroyed", len(list(debriefing.air_losses.losses)), update_layout
         )
         self.add_update_row(
             "Front line units destroyed",
-            list(debriefing.front_line_losses),
+            len(list(debriefing.front_line_losses)),
             update_layout,
         )
         self.add_update_row(
-            "Convoy units destroyed", list(debriefing.convoy_losses), update_layout
+            "Convoy units destroyed", len(list(debriefing.convoy_losses)), update_layout
         )
         self.add_update_row(
             "Shipping cargo destroyed",
-            list(debriefing.cargo_ship_losses),
+            len(list(debriefing.cargo_ship_losses)),
             update_layout,
         )
         self.add_update_row(
-            "Airlift cargo destroyed", list(debriefing.airlift_losses), update_layout
+            "Airlift cargo destroyed",
+            sum(len(loss.cargo) for loss in debriefing.airlift_losses),
+            update_layout,
         )
         self.add_update_row(
             "Ground units lost at objective areas",
-            list(debriefing.ground_object_losses),
+            len(list(debriefing.ground_object_losses)),
             update_layout,
         )
         self.add_update_row(
-            "Buildings destroyed", list(debriefing.building_losses), update_layout
+            "Buildings destroyed", len(list(debriefing.building_losses)), update_layout
         )
         self.add_update_row(
-            "Base capture events", debriefing.base_captures, update_layout
+            "Base capture events", len(debriefing.base_captures), update_layout
         )
 
         # Clear previous content of the window