eksplicit mapping af envs

backend/app/services/match_service.py

@@ -0,0 +1,38 @@
+from app.services.session_service import get_session
+from app.services.ws_manager import manager
+
+
+async def attempt_match(own_token: str, detected_token: str) -> dict:
+    """
+    Check if two nearby users share interests and both consent.
+    Sends a WebSocket nudge to both if matched.
+    """
+    own_session = await get_session(own_token)
+    other_session = await get_session(detected_token)
+
+    if own_session is None or other_session is None:
+        return {"match": False, "shared_interests": [], "nudge_sent": False}
+
+    own_interests = set(own_session.get("interests", []))
+    other_interests = set(other_session.get("interests", []))
+    shared = list(own_interests & other_interests)
+
+    if not shared:
+        return {"match": False, "shared_interests": [], "nudge_sent": False}
+
+    nudge = {
+        "type": "nudge",
+        "shared_interests": shared,
+        "message": f"Someone nearby shares your interest in {_format_interests(shared)}.",
+    }
+
+    await manager.send(own_token, nudge)
+    await manager.send(detected_token, nudge)
+
+    return {"match": True, "shared_interests": shared, "nudge_sent": True}
+
+
+def _format_interests(interests: list[str]) -> str:
+    if len(interests) == 1:
+        return interests[0]
+    return ", ".join(interests[:-1]) + " and " + interests[-1]