Add player event V2 pipeline foundation

backend/app/player_event_source.py

@@ -0,0 +1,62 @@
+"""Player event source selection and contracts for the V2 pipeline."""
+
+from __future__ import annotations
+
+from typing import Protocol
+
+from .config import get_historical_data_source_kind
+from .player_event_models import PlayerEventRecord
+from .providers.player_event_source_provider import PublicScoreboardPlayerEventSource
+
+
+class PlayerEventSource(Protocol):
+    """Contract for adapters that normalize player event signals."""
+
+    source_kind: str
+
+    def extract_match_events(
+        self,
+        *,
+        server_slug: str,
+        match_payload: dict[str, object],
+        source_ref: str | None = None,
+    ) -> list[PlayerEventRecord]:
+        """Normalize one match payload into reusable player event records."""
+
+    def describe_scope(self) -> dict[str, object]:
+        """Describe what the adapter can and cannot capture today."""
+
+
+class RconPlayerEventSource:
+    """Placeholder adapter for a future raw RCON/log feed."""
+
+    source_kind = "rcon-events"
+
+    def extract_match_events(
+        self,
+        *,
+        server_slug: str,
+        match_payload: dict[str, object],
+        source_ref: str | None = None,
+    ) -> list[PlayerEventRecord]:
+        raise RuntimeError("Raw RCON player event extraction is not implemented yet.")
+
+    def describe_scope(self) -> dict[str, object]:
+        return {
+            "source_kind": self.source_kind,
+            "supports_raw_kill_events": False,
+            "captures": [],
+            "limitations": [
+                "No raw RCON event or log feed is integrated in this repository yet.",
+            ],
+        }
+
+
+def get_player_event_source() -> PlayerEventSource:
+    """Select the event adapter that best matches the configured historical source."""
+    source_kind = get_historical_data_source_kind()
+    if source_kind == "public-scoreboard":
+        return PublicScoreboardPlayerEventSource()
+    if source_kind == "rcon":
+        return RconPlayerEventSource()
+    raise ValueError(f"Unsupported player event source: {source_kind}")