rebuild(stage-6): deliver emotion and market pools

next/backend/data/repository.py

@@ -126,6 +126,62 @@ class MarketRepository:
             )
         )
 
+    def active_stock_count(self, connection: sqlite3.Connection) -> int:
+        row = connection.execute(
+            """
+            SELECT COUNT(*) AS count FROM market_entities
+            WHERE entity_type = 'stock' AND active = 1
+            """
+        ).fetchone()
+        return int(row["count"] if row else 0)
+
+    def save_summary(
+        self,
+        connection: sqlite3.Connection,
+        *,
+        trade_date: str,
+        observed_at: str,
+        state: str,
+        source: str,
+        coverage: float,
+        payload: dict[str, Any],
+    ) -> None:
+        connection.execute(
+            """
+            INSERT INTO market_summaries
+                (trade_date, observed_at, state, source, coverage, payload_json, created_at)
+            VALUES (?, ?, ?, ?, ?, ?, ?)
+            ON CONFLICT(trade_date) DO UPDATE SET
+                observed_at = excluded.observed_at,
+                state = excluded.state,
+                source = excluded.source,
+                coverage = excluded.coverage,
+                payload_json = excluded.payload_json,
+                created_at = excluded.created_at
+            """,
+            (
+                trade_date,
+                observed_at,
+                state,
+                source,
+                coverage,
+                json.dumps(payload, ensure_ascii=False, separators=(",", ":")),
+                datetime.now().astimezone().isoformat(timespec="seconds"),
+            ),
+        )
+
+    def summaries(
+        self, connection: sqlite3.Connection, through: str, limit: int = 260
+    ) -> tuple[sqlite3.Row, ...]:
+        rows = connection.execute(
+            """
+            SELECT * FROM market_summaries WHERE trade_date <= ?
+            ORDER BY trade_date DESC LIMIT ?
+            """,
+            (through, limit),
+        ).fetchall()
+        return tuple(reversed(rows))
+
     def latest_summary(self, connection: sqlite3.Connection, through: str) -> sqlite3.Row | None:
         return connection.execute(
             "SELECT * FROM market_summaries WHERE trade_date <= ? ORDER BY trade_date DESC LIMIT 1",