feat: saxo history

backend/services/database.py

@@ -6219,6 +6219,49 @@ def get_latest_saxo_snapshot_rows(symbol: str) -> List[Dict[str, Any]]:
     return [dict(r) for r in rows]
 
 
+def get_snapshot_rows_asof(symbol: Optional[str] = None, as_of: Optional[str] = None) -> List[Dict[str, Any]]:
+    """One row per (symbol, expiry_date, strike, option_type) — the freshest capture at or
+    before `as_of` (an ISO datetime string), or simply the freshest capture overall when
+    as_of is omitted. Powers the Saxo History page's default 'current chain' view and its
+    'replay a past moment' filter — the full granular history stays in the table underneath
+    for later backtest use, this just picks one row per contract."""
+    conn = get_conn()
+    where_symbol = "AND symbol = ?" if symbol else ""
+    where_asof = "AND created_at <= ?" if as_of else ""
+    params: List[Any] = []
+    if symbol:
+        params.append(symbol)
+    if as_of:
+        params.append(as_of)
+    rows = conn.execute(f"""
+        SELECT s.* FROM saxo_option_snapshots s
+        JOIN (
+            SELECT symbol, expiry_date, strike, option_type, MAX(created_at) AS max_created
+            FROM saxo_option_snapshots
+            WHERE 1=1 {where_symbol} {where_asof}
+            GROUP BY symbol, expiry_date, strike, option_type
+        ) latest
+        ON s.symbol = latest.symbol AND s.expiry_date = latest.expiry_date
+           AND s.strike = latest.strike AND s.option_type = latest.option_type
+           AND s.created_at = latest.max_created
+        ORDER BY s.symbol, s.expiry_date, s.strike
+    """, params).fetchall()
+    conn.close()
+    return [dict(r) for r in rows]
+
+
+def delete_saxo_snapshots(symbol: str) -> int:
+    """Wipes the full accumulated history for one symbol (all expiries/strikes/dates) —
+    the raw history table is otherwise never pruned, so this is the user-triggered escape
+    hatch for a ticker they no longer want tracked."""
+    conn = get_conn()
+    cur = conn.execute("DELETE FROM saxo_option_snapshots WHERE symbol = ?", (symbol,))
+    deleted = cur.rowcount
+    conn.commit()
+    conn.close()
+    return deleted
+
+
 def upsert_saxo_catalog_rows(rows: List[Dict[str, Any]]):
     if not rows:
         return