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import json
import sqlite3
import uuid
from contextlib import contextmanager
from datetime import datetime, timezone
from typing import Optional, Any
from core.ports import LLM2Output, LLMProvider
from dotenv import load_dotenv
try:
import libsql_experimental as libsql
except ImportError:
libsql = None
load_dotenv()
TURSO_DATABASE_URL = os.getenv("TURSO_DATABASE_URL")
TURSO_AUTH_TOKEN = os.getenv("TURSO_AUTH_TOKEN")
CLOUD_MODE = os.getenv("CLOUD_MODE", "false").lower() == "true"
class SQLiteBaseStore:
"""Base class for SQLite stores providing connection and initialization."""
def __init__(self, db_path: str):
self.db_path = db_path
self._init_db()
@contextmanager
def _get_conn(self):
"""
Yields a short-lived SQLite/Turso connection wrapped in a transaction block.
Ensures the connection is properly closed to prevent file descriptor/memory leaks.
"""
if CLOUD_MODE and TURSO_DATABASE_URL and libsql:
conn = libsql.connect(TURSO_DATABASE_URL, auth_token=TURSO_AUTH_TOKEN)
else:
os.makedirs(os.path.dirname(os.path.abspath(self.db_path)), exist_ok=True)
conn = sqlite3.connect(self.db_path, check_same_thread=False)
conn.row_factory = sqlite3.Row
try:
# The inner 'with conn:' handles committing or rolling back the transaction
with conn:
yield conn
finally:
conn.close()
def _init_db(self):
with self._get_conn() as conn:
conn.executescript("""
CREATE TABLE IF NOT EXISTS users (
id TEXT PRIMARY KEY,
username TEXT UNIQUE NOT NULL,
email TEXT UNIQUE NOT NULL,
password_hash TEXT NOT NULL,
nationality TEXT,
emergency_contact TEXT,
emergency_contact_name TEXT,
emergency_contact_phone TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS patients (
patient_id TEXT PRIMARY KEY,
user_id TEXT,
name TEXT NOT NULL,
age INTEGER,
gender TEXT,
occupation TEXT,
primary_concern TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (user_id) REFERENCES users(id)
);
CREATE TABLE IF NOT EXISTS sessions (
session_id TEXT PRIMARY KEY,
patient_id TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
last_active_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
is_active INTEGER DEFAULT 1,
rolling_summary TEXT DEFAULT '',
summarized_msg_count INTEGER DEFAULT 0,
FOREIGN KEY (patient_id) REFERENCES patients(patient_id)
);
CREATE TABLE IF NOT EXISTS messages (
id INTEGER PRIMARY KEY AUTOINCREMENT,
session_id TEXT NOT NULL,
role TEXT NOT NULL,
content TEXT NOT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (session_id) REFERENCES sessions(session_id)
);
CREATE TABLE IF NOT EXISTS patient_profile (
patient_id TEXT PRIMARY KEY,
profile_json TEXT NOT NULL DEFAULT '{}',
long_term_memory_json TEXT NOT NULL DEFAULT '{}',
updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (patient_id) REFERENCES patients(patient_id)
);
CREATE INDEX IF NOT EXISTS idx_messages_session
ON messages(session_id, id);
""")
# Safe migrations
try:
conn.execute("ALTER TABLE patients ADD COLUMN gender TEXT")
conn.execute("ALTER TABLE patients ADD COLUMN occupation TEXT")
conn.execute("ALTER TABLE patients ADD COLUMN primary_concern TEXT")
except sqlite3.OperationalError:
pass
try:
conn.execute("ALTER TABLE users ADD COLUMN emergency_contact_name TEXT")
conn.execute("ALTER TABLE users ADD COLUMN emergency_contact_phone TEXT")
except sqlite3.OperationalError:
pass
try:
conn.execute("ALTER TABLE patient_profile ADD COLUMN long_term_memory_json TEXT NOT NULL DEFAULT '{}'")
except sqlite3.OperationalError:
pass
try:
conn.execute("ALTER TABLE sessions ADD COLUMN summarized_msg_count INTEGER DEFAULT 0")
except sqlite3.OperationalError:
pass
try:
conn.execute("ALTER TABLE sessions ADD COLUMN is_active INTEGER DEFAULT 1")
except sqlite3.OperationalError:
pass
try:
conn.execute("ALTER TABLE patients ADD COLUMN user_id TEXT")
except sqlite3.OperationalError:
pass
def _now(self) -> str:
return datetime.now(timezone.utc).isoformat()
class SQLiteProfileStore(SQLiteBaseStore):
"""Concrete implementation of ProfileStore using SQLite."""
def create_patient(
self,
name: str,
age: Optional[int] = None,
gender: Optional[str] = None,
occupation: Optional[str] = None,
primary_concern: Optional[str] = None,
user_id: Optional[str] = None
) -> str:
patient_id = str(uuid.uuid4())
with self._get_conn() as conn:
conn.execute(
"INSERT INTO patients(patient_id, user_id, name, age, gender, occupation, primary_concern) VALUES(?,?,?,?,?,?,?)",
(patient_id, user_id, name, age, gender, occupation, primary_concern),
)
return patient_id
def list_patients(self) -> list[dict]:
with self._get_conn() as conn:
rows = conn.execute(
"SELECT patient_id, name, age, gender, occupation, primary_concern, created_at FROM patients ORDER BY name"
).fetchall()
return [dict(r) for r in rows]
def list_patients_for_user(self, user_id: str) -> list[dict]:
with self._get_conn() as conn:
rows = conn.execute(
"SELECT patient_id, name, age, gender, occupation, primary_concern, created_at FROM patients WHERE user_id=? ORDER BY name",
(user_id,)
).fetchall()
return [dict(r) for r in rows]
def get_patient(self, patient_id: str) -> dict:
with self._get_conn() as conn:
row = conn.execute(
"""
SELECT p.patient_id, p.name, p.age, p.gender, p.occupation, p.primary_concern, p.created_at, u.nationality
FROM patients p
LEFT JOIN users u ON p.user_id = u.id
WHERE p.patient_id=?
""",
(patient_id,),
).fetchone()
return dict(row) if row else {}
def update_primary_concern(self, patient_id: str, new_concern: str) -> None:
with self._get_conn() as conn:
conn.execute(
"UPDATE patients SET primary_concern=? WHERE patient_id=?",
(new_concern, patient_id)
)
def get_patient_profile(self, patient_id: str) -> dict:
with self._get_conn() as conn:
row = conn.execute(
"SELECT profile_json FROM patient_profile WHERE patient_id=?",
(patient_id,),
).fetchone()
if not row:
return {}
try:
return json.loads(row["profile_json"])
except Exception:
return {}
def get_long_term_memory(self, patient_id: str) -> dict:
with self._get_conn() as conn:
row = conn.execute(
"SELECT long_term_memory_json FROM patient_profile WHERE patient_id=?",
(patient_id,),
).fetchone()
if not row:
return {}
try:
return json.loads(row["long_term_memory_json"])
except Exception:
return {}
def update_long_term_memory(self, patient_id: str, llm_output: Any) -> None:
memory = self.get_long_term_memory(patient_id)
list_fields = [
"emotional_themes", "thinking_patterns", "behavioral_patterns",
"interpersonal_dynamics", "stressors", "unclear_areas", "protective_factors"
]
for field in list_fields:
if hasattr(llm_output, field):
memory[field] = getattr(llm_output, field)
if hasattr(llm_output, "risk_assessment"):
memory["risk_assessment"] = getattr(llm_output, "risk_assessment")
memory["last_analyzed"] = self._now()
with self._get_conn() as conn:
conn.execute(
"""
INSERT INTO patient_profile(patient_id, long_term_memory_json, updated_at)
VALUES(?,?,?)
ON CONFLICT(patient_id) DO UPDATE SET
long_term_memory_json=excluded.long_term_memory_json,
updated_at=excluded.updated_at
""",
(patient_id, json.dumps(memory), self._now()),
)
def update_patient_profile(self, patient_id: str, llm_output: Any) -> None:
profile = self.get_patient_profile(patient_id)
list_fields = [
"emotional_themes", "thinking_patterns", "behavioral_patterns",
"interpersonal_dynamics", "stressors", "unclear_areas", "protective_factors"
]
for field in list_fields:
if hasattr(llm_output, field):
profile[field] = getattr(llm_output, field)
if hasattr(llm_output, "risk_assessment"):
profile["risk_assessment"] = getattr(llm_output, "risk_assessment")
if hasattr(llm_output, "session_summary"):
profile["last_session_summary"] = getattr(llm_output, "session_summary")
profile["last_analyzed"] = self._now()
with self._get_conn() as conn:
conn.execute(
"""
INSERT INTO patient_profile(patient_id, profile_json, updated_at)
VALUES(?,?,?)
ON CONFLICT(patient_id) DO UPDATE SET
profile_json=excluded.profile_json,
updated_at=excluded.updated_at
""",
(patient_id, json.dumps(profile), self._now()),
)
def get_patient_sessions(self, patient_id: str) -> list[dict]:
with self._get_conn() as conn:
rows = conn.execute(
"SELECT session_id, created_at, last_active_at, rolling_summary, is_active FROM sessions WHERE patient_id=? ORDER BY created_at DESC",
(patient_id,)
).fetchall()
return [dict(r) for r in rows]
def build_profile_recap(self, patient_id: str) -> Optional[str]:
memory = self.get_long_term_memory(patient_id)
if not memory:
memory = self.get_patient_profile(patient_id)
if not memory:
return None
lines = ["[Returning patient — prior session context (not to be quoted back verbatim)]:"]
sessions = self.get_patient_sessions(patient_id)
valid_summaries = []
for s in sessions:
summ = s.get("rolling_summary")
if summ and summ.strip() and "no summary available" not in summ.lower():
valid_summaries.append(summ)
if len(valid_summaries) >= 3:
break
if valid_summaries:
# Reverse to be chronologically ordered (oldest to newest)
valid_summaries.reverse()
lines.append("Recent session summaries:")
for i, summ in enumerate(valid_summaries):
lines.append(f" - {summ}")
if memory.get("emotional_themes"):
lines.append(f"Emotional themes: {'; '.join(memory['emotional_themes'][:4])}")
if memory.get("stressors"):
lines.append(f"Key stressors: {'; '.join(memory['stressors'][:4])}")
if memory.get("risk_assessment") and memory["risk_assessment"] != "Not yet assessed":
lines.append(f"Last risk status: {memory['risk_assessment'][:120]}")
if memory.get("protective_factors"):
lines.append(f"Protective factors: {'; '.join(memory['protective_factors'][:3])}")
if memory.get("last_analyzed"):
lines.append(f"Last analyzed: {memory['last_analyzed']}")
return "\n".join(lines)
def reset_patient_data(self, patient_id: str) -> None:
with self._get_conn() as conn:
conn.execute("DELETE FROM messages WHERE session_id IN (SELECT session_id FROM sessions WHERE patient_id = ?)", (patient_id,))
conn.execute("DELETE FROM sessions WHERE patient_id = ?", (patient_id,))
conn.execute(
"UPDATE patient_profile SET profile_json = '{}', long_term_memory_json = '{}', updated_at = ? WHERE patient_id = ?",
(self._now(), patient_id)
)
def delete_patient(self, patient_id: str) -> None:
with self._get_conn() as conn:
conn.execute("DELETE FROM messages WHERE session_id IN (SELECT session_id FROM sessions WHERE patient_id = ?)", (patient_id,))
conn.execute("DELETE FROM sessions WHERE patient_id = ?", (patient_id,))
conn.execute("DELETE FROM patient_profile WHERE patient_id = ?", (patient_id,))
conn.execute("DELETE FROM patients WHERE patient_id = ?", (patient_id,))
class SQLiteSessionStore(SQLiteBaseStore):
"""Concrete implementation of SessionStore using SQLite."""
def __init__(self, db_path: str, working_memory_turns: int):
super().__init__(db_path)
self.working_memory_turns = working_memory_turns
def create_session(self, patient_id: Optional[str] = None) -> str:
session_id = str(uuid.uuid4())
if patient_id is None:
patient_id = str(uuid.uuid4())
with self._get_conn() as conn:
row = conn.execute(
"SELECT 1 FROM patients WHERE patient_id=?", (patient_id,)
).fetchone()
if not row:
conn.execute(
"INSERT INTO patients(patient_id, name, age) VALUES(?,?,?)",
(patient_id, "Guest Patient", None),
)
with self._get_conn() as conn:
conn.execute(
"INSERT INTO sessions(session_id, patient_id, is_active, created_at, last_active_at) VALUES(?,?,1,?,?)",
(session_id, patient_id, self._now(), self._now()),
)
return session_id
def end_session(self, session_id: str) -> None:
with self._get_conn() as conn:
conn.execute(
"UPDATE sessions SET last_active_at=?, is_active=0 WHERE session_id=?",
(self._now(), session_id),
)
def get_abandoned_sessions(self, timeout_minutes: int) -> list[str]:
with self._get_conn() as conn:
rows = conn.execute(
f"SELECT session_id FROM sessions WHERE is_active=1 AND last_active_at < datetime('now', '-{timeout_minutes} minutes')"
).fetchall()
return [r["session_id"] for r in rows]
def session_exists(self, session_id: str) -> bool:
with self._get_conn() as conn:
row = conn.execute(
"SELECT 1 FROM sessions WHERE session_id=?", (session_id,)
).fetchone()
return row is not None
def append_message(self, session_id: str, role: str, content: str) -> None:
with self._get_conn() as conn:
conn.execute(
"INSERT INTO messages(session_id, role, content, created_at) VALUES(?,?,?,?)",
(session_id, role, content, self._now()),
)
conn.execute(
"UPDATE sessions SET last_active_at=? WHERE session_id=?",
(self._now(), session_id),
)
def get_active_session(self, patient_id: str) -> Optional[str]:
with self._get_conn() as conn:
row = conn.execute(
"SELECT session_id FROM sessions WHERE patient_id=? AND is_active=1 ORDER BY created_at DESC LIMIT 1",
(patient_id,)
).fetchone()
return row["session_id"] if row else None
def get_all_messages(self, session_id: str) -> list[dict]:
with self._get_conn() as conn:
rows = conn.execute(
"SELECT role, content FROM messages WHERE session_id=? ORDER BY id",
(session_id,),
).fetchall()
return [{"role": r["role"], "content": r["content"]} for r in rows]
def _get_rolling_summary(self, session_id: str) -> tuple[str, int]:
with self._get_conn() as conn:
row = conn.execute(
"SELECT rolling_summary, summarized_msg_count FROM sessions WHERE session_id=?", (session_id,)
).fetchone()
if not row:
return "", 0
return (row["rolling_summary"] or ""), (row["summarized_msg_count"] or 0)
def _set_rolling_summary(self, session_id: str, summary: str, count: int):
with self._get_conn() as conn:
conn.execute(
"UPDATE sessions SET rolling_summary=?, summarized_msg_count=? WHERE session_id=?",
(summary, count, session_id),
)
def get_working_context(self, session_id: str, llm_engine: Optional[LLMProvider] = None) -> list:
all_msgs = self.get_all_messages(session_id)
if len(all_msgs) <= self.working_memory_turns:
return all_msgs
tail = all_msgs[-self.working_memory_turns:]
summary, _ = self._get_rolling_summary(session_id)
context = []
if summary:
context.append({
"role": "system",
"content": f"[Earlier session summary — do not quote back to patient]: {summary}",
})
context.extend(tail)
return context
def get_patient_id(self, session_id: str) -> Optional[str]:
with self._get_conn() as conn:
row = conn.execute(
"SELECT patient_id FROM sessions WHERE session_id=?", (session_id,)
).fetchone()
return row["patient_id"] if row else None
def get_session_count(self, patient_id: str) -> int:
with self._get_conn() as conn:
row = conn.execute(
"SELECT COUNT(*) FROM sessions WHERE patient_id=?", (patient_id,)
).fetchone()
return row[0]
def save_session_summary(self, session_id: str, summary: str) -> None:
with self._get_conn() as conn:
conn.execute(
"UPDATE sessions SET rolling_summary = ? WHERE session_id = ?",
(summary, session_id)
)
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