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The public CLI must keep working without MongoDB. This module therefore
exposes one small async store interface and returns a no-op implementation
unless ``MONGODB_URI`` is configured and reachable.
"""
from __future__ import annotations
import logging
import os
from datetime import UTC, datetime
from typing import Any
from bson import BSON
from pymongo import AsyncMongoClient, DeleteMany, ReturnDocument, UpdateOne
from pymongo.errors import DuplicateKeyError, InvalidDocument, PyMongoError
logger = logging.getLogger(__name__)
SCHEMA_VERSION = 1
MAX_BSON_BYTES = 15 * 1024 * 1024
def _now() -> datetime:
return datetime.now(UTC)
def _doc_id(session_id: str, idx: int) -> str:
return f"{session_id}:{idx}"
def _safe_message_doc(message: dict[str, Any]) -> dict[str, Any]:
"""Return a Mongo-safe message document payload.
Mongo's hard document limit is 16 MB. We stay below that and store an
explicit marker rather than failing the whole snapshot for one huge tool log.
"""
try:
if len(BSON.encode({"message": message})) <= MAX_BSON_BYTES:
return message
except (InvalidDocument, OverflowError):
pass
return {
"role": "tool",
"content": (
"[SYSTEM: A single persisted message exceeded MongoDB's document "
"size/encoding limit and was replaced by this marker.]"
),
"ml_intern_persistence_error": "message_too_large_or_invalid",
}
class NoopSessionStore:
"""Async no-op store used when Mongo is not configured."""
enabled = False
async def init(self) -> None:
return None
async def close(self) -> None:
return None
async def upsert_session(self, **_: Any) -> None:
return None
async def save_snapshot(self, **_: Any) -> None:
return None
async def load_session(self, *_: Any, **__: Any) -> dict[str, Any] | None:
return None
async def list_sessions(self, *_: Any, **__: Any) -> list[dict[str, Any]]:
return []
async def soft_delete_session(self, *_: Any, **__: Any) -> None:
return None
async def update_session_fields(self, *_: Any, **__: Any) -> None:
return None
async def append_event(self, *_: Any, **__: Any) -> int | None:
return None
async def load_events_after(self, *_: Any, **__: Any) -> list[dict[str, Any]]:
return []
async def append_trace_message(self, *_: Any, **__: Any) -> int | None:
return None
async def get_quota(self, *_: Any, **__: Any) -> int | None:
return None
async def try_increment_quota(self, *_: Any, **__: Any) -> int | None:
return None
async def refund_quota(self, *_: Any, **__: Any) -> None:
return None
async def mark_pro_seen(self, *_: Any, **__: Any) -> dict[str, Any] | None:
return None
class MongoSessionStore(NoopSessionStore):
"""MongoDB-backed session store."""
enabled = True
def __init__(self, uri: str, db_name: str) -> None:
self.uri = uri
self.db_name = db_name
self.enabled = False
self.client: AsyncMongoClient | None = None
self.db = None
async def init(self) -> None:
try:
self.client = AsyncMongoClient(self.uri, serverSelectionTimeoutMS=3000)
self.db = self.client[self.db_name]
await self.client.admin.command("ping")
await self._create_indexes()
self.enabled = True
logger.info("Mongo session persistence enabled (db=%s)", self.db_name)
except Exception as e:
logger.warning("Mongo session persistence disabled: %s", e)
self.enabled = False
if self.client is not None:
await self.client.close()
self.client = None
self.db = None
async def close(self) -> None:
if self.client is not None:
await self.client.close()
self.client = None
self.db = None
async def _create_indexes(self) -> None:
if self.db is None:
return
await self.db.sessions.create_index(
[("user_id", 1), ("visibility", 1), ("updated_at", -1)]
)
await self.db.sessions.create_index(
[("visibility", 1), ("status", 1), ("last_active_at", -1)]
)
await self.db.session_messages.create_index(
[("session_id", 1), ("idx", 1)], unique=True
)
await self.db.session_events.create_index(
[("session_id", 1), ("seq", 1)], unique=True
)
await self.db.session_trace_messages.create_index(
[("session_id", 1), ("seq", 1)], unique=True
)
await self.db.session_trace_messages.create_index([("created_at", -1)])
await self.db.pro_users.create_index([("first_seen_pro_at", -1)])
def _ready(self) -> bool:
return bool(self.enabled and self.db is not None)
async def upsert_session(
self,
*,
session_id: str,
user_id: str,
model: str,
title: str | None = None,
surface: str = "frontend",
created_at: datetime | None = None,
runtime_state: str = "idle",
status: str = "active",
message_count: int = 0,
turn_count: int = 0,
pending_approval: list[dict[str, Any]] | None = None,
claude_counted: bool = False,
notification_destinations: list[str] | None = None,
auto_approval_enabled: bool = False,
auto_approval_cost_cap_usd: float | None = None,
auto_approval_estimated_spend_usd: float = 0.0,
) -> None:
if not self._ready():
return
now = _now()
await self.db.sessions.update_one(
{"_id": session_id},
{
"$setOnInsert": {
"_id": session_id,
"session_id": session_id,
"user_id": user_id,
"surface": surface,
"created_at": created_at or now,
"schema_version": SCHEMA_VERSION,
"visibility": "live",
},
"$set": {
"title": title,
"model": model,
"status": status,
"runtime_state": runtime_state,
"updated_at": now,
"last_active_at": now,
"message_count": message_count,
"turn_count": turn_count,
"pending_approval": pending_approval or [],
"claude_counted": claude_counted,
"notification_destinations": notification_destinations or [],
"auto_approval_enabled": auto_approval_enabled,
"auto_approval_cost_cap_usd": auto_approval_cost_cap_usd,
"auto_approval_estimated_spend_usd": auto_approval_estimated_spend_usd,
},
},
upsert=True,
)
async def save_snapshot(
self,
*,
session_id: str,
user_id: str,
model: str,
messages: list[dict[str, Any]],
title: str | None = None,
runtime_state: str = "idle",
status: str = "active",
turn_count: int = 0,
pending_approval: list[dict[str, Any]] | None = None,
claude_counted: bool = False,
created_at: datetime | None = None,
notification_destinations: list[str] | None = None,
auto_approval_enabled: bool = False,
auto_approval_cost_cap_usd: float | None = None,
auto_approval_estimated_spend_usd: float = 0.0,
) -> None:
if not self._ready():
return
now = _now()
await self.upsert_session(
session_id=session_id,
user_id=user_id,
model=model,
title=title,
created_at=created_at,
runtime_state=runtime_state,
status=status,
message_count=len(messages),
turn_count=turn_count,
pending_approval=pending_approval,
claude_counted=claude_counted,
notification_destinations=notification_destinations,
auto_approval_enabled=auto_approval_enabled,
auto_approval_cost_cap_usd=auto_approval_cost_cap_usd,
auto_approval_estimated_spend_usd=auto_approval_estimated_spend_usd,
)
ops: list[Any] = []
for idx, raw in enumerate(messages):
ops.append(
UpdateOne(
{"_id": _doc_id(session_id, idx)},
{
"$set": {
"session_id": session_id,
"idx": idx,
"message": _safe_message_doc(raw),
"updated_at": now,
},
"$setOnInsert": {"created_at": now},
},
upsert=True,
)
)
ops.append(
DeleteMany({"session_id": session_id, "idx": {"$gte": len(messages)}})
)
try:
if ops:
await self.db.session_messages.bulk_write(ops, ordered=False)
except PyMongoError as e:
logger.warning("Failed to persist session %s snapshot: %s", session_id, e)
async def load_session(
self, session_id: str, *, include_deleted: bool = False
) -> dict[str, Any] | None:
if not self._ready():
return None
meta = await self.db.sessions.find_one({"_id": session_id})
if not meta:
return None
if meta.get("visibility") == "deleted" and not include_deleted:
return None
cursor = self.db.session_messages.find({"session_id": session_id}).sort(
"idx", 1
)
messages = [row.get("message") async for row in cursor]
return {"metadata": meta, "messages": messages}
async def list_sessions(
self, user_id: str, *, include_deleted: bool = False
) -> list[dict[str, Any]]:
if not self._ready():
return []
query: dict[str, Any] = {"user_id": user_id}
if user_id == "dev":
query = {}
if not include_deleted:
query["visibility"] = {"$ne": "deleted"}
cursor = self.db.sessions.find(query).sort("updated_at", -1)
return [row async for row in cursor]
async def soft_delete_session(self, session_id: str) -> None:
if not self._ready():
return
await self.db.sessions.update_one(
{"_id": session_id},
{
"$set": {
"visibility": "deleted",
"runtime_state": "idle",
"updated_at": _now(),
}
},
)
async def update_session_fields(self, session_id: str, **fields: Any) -> None:
if not self._ready() or not fields:
return
fields["updated_at"] = _now()
await self.db.sessions.update_one({"_id": session_id}, {"$set": fields})
async def _next_seq(self, counter_id: str) -> int:
doc = await self.db.counters.find_one_and_update(
{"_id": counter_id},
{"$inc": {"seq": 1}},
upsert=True,
return_document=ReturnDocument.AFTER,
)
return int(doc["seq"])
async def append_event(
self, session_id: str, event_type: str, data: dict[str, Any] | None
) -> int | None:
if not self._ready():
return None
try:
seq = await self._next_seq(f"event:{session_id}")
await self.db.session_events.insert_one(
{
"_id": _doc_id(session_id, seq),
"session_id": session_id,
"seq": seq,
"event_type": event_type,
"data": data or {},
"created_at": _now(),
}
)
return seq
except PyMongoError as e:
logger.debug("Failed to append event for %s: %s", session_id, e)
return None
async def load_events_after(
self, session_id: str, after_seq: int = 0
) -> list[dict[str, Any]]:
if not self._ready():
return []
cursor = self.db.session_events.find(
{"session_id": session_id, "seq": {"$gt": int(after_seq or 0)}}
).sort("seq", 1)
return [row async for row in cursor]
async def append_trace_message(
self, session_id: str, message: dict[str, Any], source: str = "message"
) -> int | None:
if not self._ready():
return None
try:
seq = await self._next_seq(f"trace:{session_id}")
await self.db.session_trace_messages.insert_one(
{
"_id": _doc_id(session_id, seq),
"session_id": session_id,
"seq": seq,
"role": message.get("role"),
"message": _safe_message_doc(message),
"source": source,
"created_at": _now(),
}
)
return seq
except PyMongoError as e:
logger.debug("Failed to append trace message for %s: %s", session_id, e)
return None
async def get_quota(self, user_id: str, day: str) -> int | None:
if not self._ready():
return None
doc = await self.db.claude_quotas.find_one({"_id": f"{user_id}:{day}"})
return int(doc.get("count", 0)) if doc else 0
async def try_increment_quota(self, user_id: str, day: str, cap: int) -> int | None:
if not self._ready():
return None
key = f"{user_id}:{day}"
now = _now()
try:
await self.db.claude_quotas.insert_one(
{
"_id": key,
"user_id": user_id,
"day": day,
"count": 1,
"updated_at": now,
}
)
return 1
except DuplicateKeyError:
pass
doc = await self.db.claude_quotas.find_one_and_update(
{"_id": key, "count": {"$lt": cap}},
{"$inc": {"count": 1}, "$set": {"updated_at": now}},
return_document=ReturnDocument.AFTER,
)
return int(doc["count"]) if doc else None
async def refund_quota(self, user_id: str, day: str) -> None:
if not self._ready():
return
await self.db.claude_quotas.update_one(
{"_id": f"{user_id}:{day}", "count": {"$gt": 0}},
{"$inc": {"count": -1}, "$set": {"updated_at": _now()}},
)
async def mark_pro_seen(
self, user_id: str, *, is_pro: bool
) -> dict[str, Any] | None:
"""Track per-user Pro state and detect free→Pro conversions.
Returns ``{"converted": True, "first_seen_at": ..."}`` exactly once
per user — the first time we see them as Pro after having recorded
them as non-Pro at least once. Otherwise returns ``None``.
Storing ``ever_non_pro`` lets us distinguish "user joined as Pro"
(no conversion) from "user upgraded" (conversion). The atomic
``find_one_and_update`` on a guarded filter makes the conversion
emit at-most-once even under concurrent requests.
"""
if not self._ready() or not user_id:
return None
now = _now()
set_fields: dict[str, Any] = {"last_seen_at": now, "is_pro": bool(is_pro)}
if not is_pro:
set_fields["ever_non_pro"] = True
try:
await self.db.pro_users.update_one(
{"_id": user_id},
{
"$setOnInsert": {"_id": user_id, "first_seen_at": now},
"$set": set_fields,
},
upsert=True,
)
except PyMongoError as e:
logger.debug("mark_pro_seen upsert failed for %s: %s", user_id, e)
return None
if not is_pro:
return None
try:
doc = await self.db.pro_users.find_one_and_update(
{
"_id": user_id,
"ever_non_pro": True,
"first_seen_pro_at": {"$exists": False},
},
{"$set": {"first_seen_pro_at": now}},
return_document=ReturnDocument.AFTER,
)
except PyMongoError as e:
logger.debug("mark_pro_seen conversion check failed for %s: %s", user_id, e)
return None
if not doc:
return None
return {
"converted": True,
"first_seen_at": (doc.get("first_seen_at") or now).isoformat(),
}
_store: NoopSessionStore | MongoSessionStore | None = None
def get_session_store() -> NoopSessionStore | MongoSessionStore:
global _store
if _store is None:
uri = os.environ.get("MONGODB_URI")
db_name = os.environ.get("MONGODB_DB", "ml-intern")
_store = MongoSessionStore(uri, db_name) if uri else NoopSessionStore()
return _store
def _reset_store_for_tests(
store: NoopSessionStore | MongoSessionStore | None = None,
) -> None:
global _store
_store = store
|