feat: API gateway trading endpoints, controls, backtest, WebSocket

services/api_gateway/routes/signals.py

@@ -0,0 +1,58 @@
+"""Signal endpoints — recent signals with filtering."""
+
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, Query, Request
+
+from services.api_gateway.auth.middleware import get_current_user
+from sqlalchemy import select, desc, func
+
+router = APIRouter(prefix="/api/signals", tags=["signals"])
+
+
+@router.get("")
+async def list_signals(
+    request: Request,
+    _user: dict = Depends(get_current_user),
+    ticker: str | None = Query(default=None),
+    page: int = Query(default=1, ge=1),
+    per_page: int = Query(default=20, ge=1, le=100),
+) -> dict:
+    """Recent signals with optional ticker filter and pagination."""
+    from shared.models.trading import Signal
+
+    db = request.app.state.db_session_factory
+    async with db() as session:
+        query = select(Signal).order_by(desc(Signal.created_at))
+        count_query = select(func.count()).select_from(Signal)
+
+        if ticker:
+            query = query.where(Signal.ticker == ticker.upper())
+            count_query = count_query.where(Signal.ticker == ticker.upper())
+
+        total = (await session.execute(count_query)).scalar() or 0
+        offset = (page - 1) * per_page
+        query = query.offset(offset).limit(per_page)
+
+        result = await session.execute(query)
+        signals = result.scalars().all()
+
+    return {
+        "signals": [
+            {
+                "id": str(s.id),
+                "ticker": s.ticker,
+                "direction": s.direction.value,
+                "strength": s.strength,
+                "strategy_sources": s.strategy_sources,
+                "sentiment_score": s.sentiment_score,
+                "acted_on": s.acted_on,
+                "created_at": s.created_at.isoformat() if s.created_at else None,
+            }
+            for s in signals
+        ],
+        "total": total,
+        "page": page,
+        "per_page": per_page,
+        "pages": (total + per_page - 1) // per_page if per_page else 0,
+    }