feat(server): modularize backend and admin console

app/repositories/policy_repository.py

@@ -0,0 +1,62 @@
+import db
+
+
+def get_policy(app_id: str, channel: str):
+    conn = db.get_conn()
+    row = conn.execute("SELECT * FROM version_policies WHERE app_id=? AND channel=?", (app_id, channel)).fetchone()
+    conn.close()
+    return row
+
+
+def save_policy(
+    app_id: str,
+    channel: str,
+    force_update: bool,
+    allow_rollback: bool,
+    offline_allowed: bool,
+    valid_until: str,
+    min_supported_version: str,
+    disabled_versions_json: str,
+    message: str,
+) -> tuple[str, int | None]:
+    conn = db.get_conn()
+    try:
+        channel_row = conn.execute("SELECT * FROM channels WHERE app_id=? AND channel_code=?", (app_id, channel)).fetchone()
+        if not channel_row:
+            return "channel_not_found", None
+        if not channel_row["enabled"]:
+            return "channel_disabled", None
+        row = conn.execute("SELECT policy_seq FROM version_policies WHERE app_id=? AND channel=?", (app_id, channel)).fetchone()
+        next_seq = (int(row["policy_seq"]) + 1) if row else 1
+        values = (
+            next_seq,
+            int(bool(force_update)),
+            int(bool(allow_rollback)),
+            int(bool(offline_allowed)),
+            valid_until,
+            min_supported_version,
+            disabled_versions_json,
+            message,
+            app_id,
+            channel,
+        )
+        conn.execute(
+            """
+            INSERT INTO version_policies(policy_seq,force_update,allow_rollback,offline_allowed,valid_until,
+              min_supported_version,disabled_versions,message,app_id,channel)
+            VALUES(?,?,?,?,?,?,?,?,?,?)
+            ON CONFLICT(app_id,channel) DO UPDATE SET policy_seq=excluded.policy_seq,
+              force_update=excluded.force_update,allow_rollback=excluded.allow_rollback,
+              offline_allowed=excluded.offline_allowed,valid_until=excluded.valid_until,
+              min_supported_version=excluded.min_supported_version,disabled_versions=excluded.disabled_versions,
+              message=excluded.message,updated_at=datetime('now')
+            """,
+            values,
+        )
+        conn.commit()
+        return "ok", next_seq
+    except Exception:
+        conn.rollback()
+        raise
+    finally:
+        conn.close()