Partial implementation of TGO display.

No threat/detection circles yet.

https://github.com/dcs-liberation/dcs_liberation/issues/2039

game/server/tgos/models.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+from pydantic import BaseModel
+
+from game.server.leaflet import LeafletPoint
+from game.theater import TheaterGroundObject
+
+
+class TgoJs(BaseModel):
+    name: str
+    control_point_name: str
+    category: str
+    blue: bool
+    position: LeafletPoint
+    units: list[str]
+    threat_ranges: list[float]
+    detection_ranges: list[float]
+    dead: bool
+    sidc: str
+
+    @staticmethod
+    def for_tgo(tgo: TheaterGroundObject) -> TgoJs:
+        if not tgo.might_have_aa:
+            threat_ranges = []
+            detection_ranges = []
+        else:
+            threat_ranges = [tgo.threat_range(group).meters for group in tgo.groups]
+            detection_ranges = [tgo.threat_range(group).meters for group in tgo.groups]
+        return TgoJs(
+            name=tgo.name,
+            control_point_name=tgo.control_point.name,
+            category=tgo.category,
+            blue=tgo.control_point.captured,
+            position=tgo.position.latlng(),
+            units=[unit.display_name for unit in tgo.units],
+            threat_ranges=threat_ranges,
+            detection_ranges=detection_ranges,
+            dead=tgo.is_dead,
+            sidc=str(tgo.sidc()),
+        )