Implement manual squadron transfers.

Lightly tested but seems to work fine.

https://github.com/dcs-liberation/dcs_liberation/issues/1145

game/squadrons/squadron.py

@@ -53,6 +53,9 @@ class Squadron:
     settings: Settings = field(hash=False, compare=False)
 
     location: ControlPoint
+    destination: Optional[ControlPoint] = field(
+        init=False, hash=False, compare=False, default=None
+    )
 
     owned_aircraft: int = field(init=False, hash=False, compare=False, default=0)
     untasked_aircraft: int = field(init=False, hash=False, compare=False, default=0)
@@ -168,6 +171,8 @@ class Squadron:
         self._recruit_pilots(self.settings.squadron_pilot_limit)
 
     def end_turn(self) -> None:
+        if self.destination is not None:
+            self.relocate_to(self.destination)
         self.replenish_lost_pilots()
         self.deliver_orders()
 
@@ -280,6 +285,8 @@ class Squadron:
 
     def relocate_to(self, destination: ControlPoint) -> None:
         self.location = destination
+        if self.location == self.destination:
+            self.destination = None
 
     def cancel_overflow_orders(self) -> None:
         if self.pending_deliveries <= 0:
@@ -297,6 +304,42 @@ class Squadron:
     def max_fulfillable_aircraft(self) -> int:
         return max(self.number_of_available_pilots, self.untasked_aircraft)
 
+    @property
+    def expected_size_next_turn(self) -> int:
+        return self.owned_aircraft + self.pending_deliveries
+
+    def plan_relocation(self, destination: ControlPoint) -> None:
+        if destination == self.location:
+            logging.warning(
+                f"Attempted to plan relocation of {self} to current location "
+                f"{destination}. Ignoring."
+            )
+            return
+        if destination == self.destination:
+            logging.warning(
+                f"Attempted to plan relocation of {self} to current destination "
+                f"{destination}. Ignoring."
+            )
+            return
+
+        if self.expected_size_next_turn >= destination.unclaimed_parking():
+            raise RuntimeError(f"Not enough parking for {self} at {destination}.")
+        if not destination.can_operate(self.aircraft):
+            raise RuntimeError(f"{self} cannot operate at {destination}.")
+        self.destination = destination
+
+    def cancel_relocation(self) -> None:
+        if self.destination is None:
+            logging.warning(
+                f"Attempted to cancel relocation of squadron with no transfer order. "
+                "Ignoring."
+            )
+            return
+
+        if self.expected_size_next_turn >= self.location.unclaimed_parking():
+            raise RuntimeError(f"Not enough parking for {self} at {self.location}.")
+        self.destination = None
+
     @classmethod
     def create_from(
         cls,

game/theater/controlpoint.py

@@ -728,13 +728,19 @@ class ControlPoint(MissionTarget, ABC):
     def allocated_aircraft(self) -> AircraftAllocations:
         present: dict[AircraftType, int] = defaultdict(int)
         on_order: dict[AircraftType, int] = defaultdict(int)
+        transferring: dict[AircraftType, int] = defaultdict(int)
         for squadron in self.squadrons:
             present[squadron.aircraft] += squadron.owned_aircraft
-            # TODO: Only if this is the squadron destination, not location.
-            on_order[squadron.aircraft] += squadron.pending_deliveries
+            if squadron.destination is None:
+                on_order[squadron.aircraft] += squadron.pending_deliveries
+            else:
+                transferring[squadron.aircraft] -= squadron.owned_aircraft
+        for squadron in self.coalition.air_wing.iter_squadrons():
+            if squadron.destination == self:
+                on_order[squadron.aircraft] += squadron.pending_deliveries
+                transferring[squadron.aircraft] += squadron.owned_aircraft
 
-        # TODO: Implement squadron transfers.
-        return AircraftAllocations(present, on_order, transferring={})
+        return AircraftAllocations(present, on_order, transferring)
 
     def allocated_ground_units(
         self, transfers: PendingTransfers

qt_ui/errorreporter.py

@@ -0,0 +1,17 @@
+import logging
+from collections import Iterator
+from contextlib import contextmanager
+from typing import Type
+
+from PySide2.QtWidgets import QDialog, QMessageBox
+
+
+@contextmanager
+def report_errors(
+    title: str, parent: QDialog, error_type: Type[Exception] = Exception
+) -> Iterator[None]:
+    try:
+        yield
+    except error_type as ex:
+        logging.exception(title)
+        QMessageBox().critical(parent, title, str(ex), QMessageBox.Ok)

qt_ui/main.py

@@ -13,6 +13,7 @@ from PySide2.QtWidgets import QApplication, QSplashScreen
 from dcs.payloads import PayloadDirectories
 
 from game import Game, VERSION, persistency
+from game.campaignloader.campaign import Campaign
 from game.data.weapons import WeaponGroup, Pylon, Weapon
 from game.db import FACTIONS
 from game.dcs.aircrafttype import AircraftType
@@ -27,7 +28,6 @@ from qt_ui import (
 )
 from qt_ui.windows.GameUpdateSignal import GameUpdateSignal
 from qt_ui.windows.QLiberationWindow import QLiberationWindow
-from game.campaignloader.campaign import Campaign
 from qt_ui.windows.newgame.QNewGameWizard import DEFAULT_BUDGET
 from qt_ui.windows.preferences.QLiberationFirstStartWindow import (
     QLiberationFirstStartWindow,

qt_ui/windows/AirWingConfigurationDialog.py

@@ -10,7 +10,6 @@ from PySide2.QtCore import (
 )
 from PySide2.QtGui import QStandardItemModel, QStandardItem, QIcon
 from PySide2.QtWidgets import (
-    QAbstractItemView,
     QDialog,
     QListView,
     QVBoxLayout,
@@ -32,38 +31,7 @@ from game.dcs.aircrafttype import AircraftType
 from game.squadrons import AirWing, Pilot, Squadron
 from game.theater import ControlPoint, ConflictTheater
 from gen.flights.flight import FlightType
-from qt_ui.models import AirWingModel, SquadronModel
 from qt_ui.uiconstants import AIRCRAFT_ICONS
-from qt_ui.windows.AirWingDialog import SquadronDelegate
-from qt_ui.windows.SquadronDialog import SquadronDialog
-
-
-class SquadronList(QListView):
-    """List view for displaying the air wing's squadrons."""
-
-    def __init__(self, air_wing_model: AirWingModel) -> None:
-        super().__init__()
-        self.air_wing_model = air_wing_model
-        self.dialog: Optional[SquadronDialog] = None
-
-        self.setIconSize(QSize(91, 24))
-        self.setItemDelegate(SquadronDelegate(self.air_wing_model))
-        self.setModel(self.air_wing_model)
-        self.selectionModel().setCurrentIndex(
-            self.air_wing_model.index(0, 0, QModelIndex()), QItemSelectionModel.Select
-        )
-
-        # self.setIconSize(QSize(91, 24))
-        self.setSelectionBehavior(QAbstractItemView.SelectItems)
-        self.doubleClicked.connect(self.on_double_click)
-
-    def on_double_click(self, index: QModelIndex) -> None:
-        if not index.isValid():
-            return
-        self.dialog = SquadronDialog(
-            SquadronModel(self.air_wing_model.squadron_at_index(index)), self
-        )
-        self.dialog.show()
 
 
 class AllowedMissionTypeControls(QVBoxLayout):

qt_ui/windows/AirWingDialog.py

@@ -17,6 +17,7 @@ from PySide2.QtWidgets import (
 )
 
 from game.squadrons import Squadron
+from game.theater import ConflictTheater
 from gen.flights.flight import Flight
 from qt_ui.delegates import TwoColumnRowDelegate
 from qt_ui.models import GameModel, AirWingModel, SquadronModel
@@ -56,9 +57,10 @@ class SquadronDelegate(TwoColumnRowDelegate):
 class SquadronList(QListView):
     """List view for displaying the air wing's squadrons."""
 
-    def __init__(self, air_wing_model: AirWingModel) -> None:
+    def __init__(self, air_wing_model: AirWingModel, theater: ConflictTheater) -> None:
         super().__init__()
         self.air_wing_model = air_wing_model
+        self.theater = theater
         self.dialog: Optional[SquadronDialog] = None
 
         self.setIconSize(QSize(91, 24))
@@ -76,7 +78,9 @@ class SquadronList(QListView):
         if not index.isValid():
             return
         self.dialog = SquadronDialog(
-            SquadronModel(self.air_wing_model.squadron_at_index(index)), self
+            SquadronModel(self.air_wing_model.squadron_at_index(index)),
+            self.theater,
+            self,
         )
         self.dialog.show()
 
@@ -194,7 +198,10 @@ class AirWingTabs(QTabWidget):
     def __init__(self, game_model: GameModel) -> None:
         super().__init__()
 
-        self.addTab(SquadronList(game_model.blue_air_wing_model), "Squadrons")
+        self.addTab(
+            SquadronList(game_model.blue_air_wing_model, game_model.game.theater),
+            "Squadrons",
+        )
         self.addTab(AirInventoryView(game_model), "Inventory")
 
 

qt_ui/windows/SquadronDialog.py

@@ -1,5 +1,5 @@
 import logging
-from typing import Callable
+from typing import Callable, Iterator, Optional
 
 from PySide2.QtCore import (
     QItemSelectionModel,
@@ -16,11 +16,14 @@ from PySide2.QtWidgets import (
     QHBoxLayout,
     QLabel,
     QCheckBox,
+    QComboBox,
 )
 
-from game.squadrons import Pilot
+from game.squadrons import Pilot, Squadron
+from game.theater import ControlPoint, ConflictTheater
 from gen.flights.flight import FlightType
 from qt_ui.delegates import TwoColumnRowDelegate
+from qt_ui.errorreporter import report_errors
 from qt_ui.models import SquadronModel
 
 
@@ -90,10 +93,50 @@ class AutoAssignedTaskControls(QVBoxLayout):
         self.squadron_model.set_auto_assignable(task, checked)
 
 
+class SquadronDestinationComboBox(QComboBox):
+    def __init__(self, squadron: Squadron, theater: ConflictTheater) -> None:
+        super().__init__()
+        self.squadron = squadron
+        self.theater = theater
+
+        room = squadron.location.unclaimed_parking()
+        self.addItem(
+            f"Remain at {squadron.location} (room for {room} more aircraft)", None
+        )
+        selected_index: Optional[int] = None
+        for idx, destination in enumerate(sorted(self.iter_destinations(), key=str), 1):
+            if destination == squadron.destination:
+                selected_index = idx
+            room = destination.unclaimed_parking()
+            self.addItem(
+                f"Transfer to {destination} (room for {room} more aircraft)",
+                destination,
+            )
+
+        if squadron.destination is None:
+            selected_index = 0
+
+        if selected_index is not None:
+            self.setCurrentIndex(selected_index)
+
+    def iter_destinations(self) -> Iterator[ControlPoint]:
+        size = self.squadron.expected_size_next_turn
+        for control_point in self.theater.control_points_for(self.squadron.player):
+            if control_point == self:
+                continue
+            if not control_point.can_operate(self.squadron.aircraft):
+                continue
+            if control_point.unclaimed_parking() < size:
+                continue
+            yield control_point
+
+
 class SquadronDialog(QDialog):
     """Dialog window showing a squadron."""
 
-    def __init__(self, squadron_model: SquadronModel, parent) -> None:
+    def __init__(
+        self, squadron_model: SquadronModel, theater: ConflictTheater, parent
+    ) -> None:
         super().__init__(parent)
         self.squadron_model = squadron_model
 
@@ -117,6 +160,15 @@ class SquadronDialog(QDialog):
         columns.addWidget(self.pilot_list)
 
         button_panel = QHBoxLayout()
+
+        self.transfer_destination = SquadronDestinationComboBox(
+            squadron_model.squadron, theater
+        )
+        self.transfer_destination.currentIndexChanged.connect(
+            self.on_destination_changed
+        )
+        button_panel.addWidget(self.transfer_destination)
+
         button_panel.addStretch()
         layout.addLayout(button_panel)
 
@@ -132,6 +184,18 @@ class SquadronDialog(QDialog):
         self.toggle_leave_button.clicked.connect(self.toggle_leave)
         button_panel.addWidget(self.toggle_leave_button, alignment=Qt.AlignRight)
 
+    @property
+    def squadron(self) -> Squadron:
+        return self.squadron_model.squadron
+
+    def on_destination_changed(self, index: int) -> None:
+        with report_errors("Could not change squadron destination", self):
+            destination = self.transfer_destination.itemData(index)
+            if destination is None:
+                self.squadron.cancel_relocation()
+            else:
+                self.squadron.plan_relocation(destination)
+
     def check_disabled_button_states(
         self, button: QPushButton, index: QModelIndex
     ) -> bool: