Add date-based loadout restriction.

Follow up work:

* Data entry. I plan to do the air-to-air missiles in the near term. I
  covered some variants of the AIM-120, AIM-7, and AIM-9 here, but there
  are variants of those weapons for each mounting rack that need to be
  done still, as well as all the non-US weapons.
* Arbitrary start dates.

https://github.com/Khopa/dcs_liberation/issues/490

qt_ui/windows/mission/flight/payload/QLoadoutEditor.py

@@ -1,15 +1,21 @@
-import inspect
-
-from PySide2.QtWidgets import QLabel, QHBoxLayout, QGroupBox, QSpinBox, QGridLayout, QVBoxLayout, QSizePolicy
+from PySide2.QtWidgets import (
+    QGridLayout,
+    QGroupBox,
+    QLabel,
+    QSizePolicy,
+    QVBoxLayout,
+)
 
+from game import Game
 from game.data.weapons import Pylon
+from gen.flights.flight import Flight
 from qt_ui.windows.mission.flight.payload.QPylonEditor import QPylonEditor
 
 
 class QLoadoutEditor(QGroupBox):
 
-    def __init__(self, flight, game):
-        super(QLoadoutEditor, self).__init__("Use custom loadout")
+    def __init__(self, flight: Flight, game: Game) -> None:
+        super().__init__("Use custom loadout")
         self.flight = flight
         self.game = game
         self.setCheckable(True)
@@ -25,7 +31,7 @@ class QLoadoutEditor(QGroupBox):
             label.setSizePolicy(
                 QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed))
             layout.addWidget(label, i, 0)
-            layout.addWidget(QPylonEditor(flight, pylon), i, 1)
+            layout.addWidget(QPylonEditor(game, flight, pylon), i, 1)
 
         hboxLayout.addLayout(layout)
         hboxLayout.addStretch()

qt_ui/windows/mission/flight/payload/QPylonEditor.py

@@ -4,13 +4,14 @@ from typing import Optional
 
 from PySide2.QtWidgets import QComboBox
 
+from game import Game
 from game.data.weapons import Pylon, Weapon
 from gen.flights.flight import Flight
 
 
 class QPylonEditor(QComboBox):
 
-    def __init__(self, flight: Flight, pylon: Pylon) -> None:
+    def __init__(self, game: Game, flight: Flight, pylon: Pylon) -> None:
         super().__init__()
         self.flight = flight
         self.pylon = pylon
@@ -18,7 +19,11 @@ class QPylonEditor(QComboBox):
         current = self.flight.loadout.get(self.pylon.number)
 
         self.addItem("None", None)
-        allowed = sorted(pylon.allowed, key=operator.attrgetter("name"))
+        if game.settings.restrict_weapons_by_date:
+            weapons = pylon.available_on(game.date)
+        else:
+            weapons = pylon.allowed
+        allowed = sorted(weapons, key=operator.attrgetter("name"))
         for i, weapon in enumerate(allowed):
             self.addItem(weapon.name, weapon)
             if current == weapon:

qt_ui/windows/settings/QSettingsWindow.py

@@ -248,6 +248,30 @@ class QSettingsWindow(QDialog):
         campaign_layout.setAlignment(Qt.AlignTop)
         self.campaign_management_page.setLayout(campaign_layout)
 
+        general = QGroupBox("General")
+        campaign_layout.addWidget(general)
+
+        general_layout = QGridLayout()
+        general.setLayout(general_layout)
+
+        def set_restict_weapons_by_date(value: bool) -> None:
+            self.game.settings.restrict_weapons_by_date = value
+
+        restrict_weapons = QCheckBox()
+        restrict_weapons.setChecked(self.game.settings.restrict_weapons_by_date)
+        restrict_weapons.toggled.connect(set_restict_weapons_by_date)
+
+        tooltip_text = (
+            "Restricts weapon availability based on the campaign date. Data is "
+            "extremely incomplete so does not affect all weapons."
+        )
+        restrict_weapons.setToolTip(tooltip_text)
+        restrict_weapons_label = QLabel("Restrict weapons by date (WIP)")
+        restrict_weapons_label.setToolTip(tooltip_text)
+
+        general_layout.addWidget(restrict_weapons_label, 0, 0)
+        general_layout.addWidget(restrict_weapons, 0, 1, Qt.AlignRight)
+
         automation = QGroupBox("HQ Automation")
         campaign_layout.addWidget(automation)