| 1 | # -*- coding: utf-8 -*- |
| 2 | import json |
| 3 | import os |
| 4 | import time |
| 5 | |
| 6 | class SessionManager: |
| 7 | """Manages chat sessions persistence""" |
| 8 | def __init__(self, data_dir="code/data"): |
| 9 | self.data_dir = data_dir |
| 10 | if not os.path.exists(data_dir): |
| 11 | os.makedirs(data_dir) |
| 12 | |
| 13 | def _get_file(self, session_id): |
| 14 | return os.path.join(self.data_dir, f"{session_id}.json") |
| 15 | |
| 16 | def list_sessions(self): |
| 17 | """List all sessions ordered by modification time""" |
| 18 | sessions = [] |
| 19 | if not os.path.exists(self.data_dir): |
| 20 | return sessions |
| 21 | |
| 22 | files = [f for f in os.listdir(self.data_dir) if f.endswith('.json')] |
| 23 | for f in files: |
| 24 | try: |
| 25 | path = os.path.join(self.data_dir, f) |
| 26 | with open(path, 'r', encoding='utf-8') as fs: |
| 27 | data = json.load(fs) |
| 28 | # title, id, last_updated |
| 29 | sessions.append({ |
| 30 | "id": data.get("id"), |
| 31 | "title": data.get("title", "Untitled"), |
| 32 | "date": "7days", # Simplification. Real logic would calc date diff |
| 33 | "timestamp": os.path.getmtime(path) |
| 34 | }) |
| 35 | except Exception: |
| 36 | continue |
| 37 | |
| 38 | # Sort by timestamp desc |
| 39 | sessions.sort(key=lambda x: x['timestamp'], reverse=True) |
| 40 | return sessions |
| 41 | |
| 42 | def get_session(self, session_id): |
| 43 | """Get full history of a session""" |
| 44 | path = self._get_file(session_id) |
| 45 | if os.path.exists(path): |
| 46 | try: |
| 47 | with open(path, 'r', encoding='utf-8') as f: |
| 48 | return json.load(f) |
| 49 | except Exception: |
| 50 | pass |
| 51 | return None |
| 52 | |
| 53 | def save_session(self, session_id, title, messages, asset_library=None): |
| 54 | """Save or update session""" |
| 55 | data = { |
| 56 | "id": session_id, |
| 57 | "title": title, |
| 58 | "last_updated": time.time(), |
| 59 | "messages": messages, |
| 60 | "asset_library": asset_library or {} |
| 61 | } |
| 62 | with open(self._get_file(session_id), 'w', encoding='utf-8') as f: |
| 63 | json.dump(data, f, indent=2, ensure_ascii=False) |
| 64 |