Initial commit

event_manager.py

@@ -0,0 +1,63 @@
+from __future__ import annotations
+
+import logging
+from typing import Dict, Optional
+
+from flask import url_for
+
+from models import Display, EventDisplayMap, Video, db
+from sync import ActiveEventState, server_time_ms, set_trigger_event
+
+
+logger = logging.getLogger(__name__)
+
+
+def _build_assignments(event_id: int) -> Dict[str, str]:
+    maps = (
+        db.session.query(EventDisplayMap)
+        .filter_by(event_id=event_id)
+        .join(Display, EventDisplayMap.display_id == Display.id)
+        .join(Video, EventDisplayMap.video_id == Video.id)
+        .all()
+    )
+    assignments: Dict[str, str] = {}
+    for m in maps:
+        assignments[m.display.public_id] = url_for("main.media", filename=m.video.filename)
+    return assignments
+
+
+def broadcast_trigger_state(state: ActiveEventState) -> None:
+    # Lazy import to avoid circular import (sockets -> event_manager -> sockets)
+    from sockets import socketio
+
+    for public_id, video_url in state.assignments.items():
+        socketio.emit(
+            "event_start",
+            {
+                "event_id": state.event_id,
+                "event_name": state.name,
+                "video_url": video_url,
+                "start_time_ms": state.start_time_ms,
+                "server_time_ms": server_time_ms(),
+            },
+            room=f"display:{public_id}",
+        )
+
+
+def activate_trigger_event(event_id: int, start_ms: float, end_ms: float, name: str) -> Optional[ActiveEventState]:
+    """Activate a triggered event, store it in-memory, and broadcast it to displays."""
+    assignments = _build_assignments(event_id)
+    if not assignments:
+        return None
+
+    state = ActiveEventState(
+        event_id=event_id,
+        name=name,
+        start_time_ms=start_ms,
+        end_time_ms=end_ms,
+        assignments=assignments,
+    )
+    set_trigger_event(state)
+    broadcast_trigger_state(state)
+    logger.info("Activated trigger event %s (%s)", event_id, name)
+    return state