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74 lines
2.6 KiB
Python

import os
from backend.apps.agents.core.models import AgentSession
from typing import Dict, List, Optional, Tuple
from typeguard import typechecked
from backend.config.json_store import read_json_or_none, atomic_write_json
@typechecked
def sessions_dir() -> str:
# Resolve live so test patches on either the paths module or the agent_manager facade re-export land on the same directory.
from backend.apps.agents import agent_manager
return agent_manager.SESSIONS_DIR
@typechecked
def save_session(session_id: str, doc_data: Dict) -> None:
dir_path = sessions_dir()
os.makedirs(dir_path, exist_ok=True)
atomic_write_json(os.path.join(dir_path, f"{session_id}.json"), doc_data)
@typechecked
def load_session_data(session_id: str) -> Optional[Dict]:
return read_json_or_none(os.path.join(sessions_dir(), f"{session_id}.json"))
@typechecked
def delete_session_file(session_id: str) -> None:
path = os.path.join(sessions_dir(), f"{session_id}.json")
if os.path.exists(path):
os.remove(path)
@typechecked
def load_all_session_data() -> List[Tuple[str, Dict]]:
results = []
dir_path = sessions_dir()
if not os.path.exists(dir_path):
return results
for fname in os.listdir(dir_path):
if fname.endswith(".json"):
data = read_json_or_none(os.path.join(dir_path, fname))
if data is not None:
results.append((fname[:-5], data))
return results
@typechecked
def build_search_text(session: AgentSession, max_len: int = 5000) -> str:
"""Build a search-indexing string from the session name and message content."""
parts = [session.name or ""]
for msg in session.messages:
if msg.role in ("user", "assistant") and isinstance(msg.content, str):
parts.append(msg.content)
text = " ".join(parts)
return text[:max_len]
@typechecked
def snapshot_session_now(session: AgentSession) -> None:
"""Write the session to disk immediately, swallowing failure. Called the moment a user message
is appended: sessions used to reach disk only at turn END, so a backend death mid-turn destroyed
the whole conversation (404, zero bytes) if it was the first turn, and ate the turn's user
message otherwise (ENG-313). One bounded whole-file write per send, same cost as the existing
end-of-turn save; a disk hiccup must never break the send itself."""
try:
doc = session.model_dump(mode="json")
doc["search_text"] = build_search_text(session)
save_session(session.id, doc)
except Exception:
import logging
logging.getLogger(__name__).warning("snapshot_session_now failed for %s", session.id, exc_info=True)