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Supabase Client for Chat Storage
=================================
Handles conversation persistence with:
- Session management
- Message CRUD
- History retrieval
"""
import os
import uuid
from datetime import datetime
from typing import Optional, List, Dict, Any
import json
# Try to import supabase, fallback to in-memory storage
try:
from supabase import create_client, Client
SUPABASE_AVAILABLE = True
except ImportError:
SUPABASE_AVAILABLE = False
print("Warning: supabase-py not installed, using in-memory storage")
class SupabaseClient:
"""Client for Supabase chat storage operations."""
def __init__(self):
self.client: Optional[Client] = None
self._memory_sessions: Dict[str, Dict] = {}
self._memory_messages: Dict[str, List[Dict]] = {}
if SUPABASE_AVAILABLE:
url = os.environ.get("SUPABASE_URL")
key = os.environ.get("SUPABASE_KEY")
if url and key:
try:
self.client = create_client(url, key)
print("Supabase client initialized successfully")
except Exception as e:
print(f"Failed to initialize Supabase: {e}")
self.client = None
else:
print("SUPABASE_URL or SUPABASE_KEY not set")
def is_configured(self) -> bool:
"""Check if Supabase is properly configured."""
return self.client is not None
# =========================================================================
# SESSION OPERATIONS
# =========================================================================
def create_session(self, user_id: str, title: str = "New Conversation") -> Dict:
"""Create a new chat session."""
session_id = str(uuid.uuid4())
now = datetime.now().isoformat()
session_data = {
"id": session_id,
"user_id": user_id,
"title": title,
"created_at": now,
"updated_at": now
}
if self.client:
try:
result = self.client.table("chat_sessions").insert(session_data).execute()
return result.data[0] if result.data else session_data
except Exception as e:
print(f"Supabase create session error: {e}")
# Fallback to memory
# In-memory fallback
self._memory_sessions[session_id] = session_data
self._memory_messages[session_id] = []
return session_data
def get_session(self, session_id: str) -> Optional[Dict]:
"""Get session details."""
if self.client:
try:
result = self.client.table("chat_sessions").select("*").eq("id", session_id).execute()
return result.data[0] if result.data else None
except Exception as e:
print(f"Supabase get session error: {e}")
return self._memory_sessions.get(session_id)
def get_user_sessions(self, user_id: str) -> List[Dict]:
"""Get all sessions for a user, ordered by most recent."""
if self.client:
try:
result = self.client.table("chat_sessions")\
.select("*, chat_messages(count)")\
.eq("user_id", user_id)\
.order("updated_at", desc=True)\
.execute()
sessions = []
for session in result.data:
msg_count = 0
if session.get("chat_messages"):
msg_count = session["chat_messages"][0].get("count", 0) if session["chat_messages"] else 0
sessions.append({
"id": session["id"],
"title": session["title"],
"created_at": session["created_at"],
"updated_at": session["updated_at"],
"message_count": msg_count
})
return sessions
except Exception as e:
print(f"Supabase get sessions error: {e}")
# In-memory fallback
return [
{**s, "message_count": len(self._memory_messages.get(s["id"], []))}
for s in self._memory_sessions.values()
if s.get("user_id") == user_id
]
def update_session_timestamp(self, session_id: str):
"""Update session's updated_at timestamp."""
now = datetime.now().isoformat()
if self.client:
try:
self.client.table("chat_sessions")\
.update({"updated_at": now})\
.eq("id", session_id)\
.execute()
except Exception as e:
print(f"Supabase update timestamp error: {e}")
else:
if session_id in self._memory_sessions:
self._memory_sessions[session_id]["updated_at"] = now
def update_session_title(self, session_id: str, title: str):
"""Update session title."""
if self.client:
try:
self.client.table("chat_sessions")\
.update({"title": title, "updated_at": datetime.now().isoformat()})\
.eq("id", session_id)\
.execute()
except Exception as e:
print(f"Supabase update title error: {e}")
else:
if session_id in self._memory_sessions:
self._memory_sessions[session_id]["title"] = title
def delete_session(self, session_id: str):
"""Delete session and all its messages."""
if self.client:
try:
# Delete messages first (foreign key constraint)
self.client.table("chat_messages").delete().eq("session_id", session_id).execute()
self.client.table("chat_sessions").delete().eq("id", session_id).execute()
except Exception as e:
print(f"Supabase delete session error: {e}")
else:
self._memory_sessions.pop(session_id, None)
self._memory_messages.pop(session_id, None)
# =========================================================================
# MESSAGE OPERATIONS
# =========================================================================
def add_message(
self,
session_id: str,
role: str,
content: str,
context_used: Optional[List[str]] = None
) -> str:
"""Add a message to a session."""
message_id = str(uuid.uuid4())
now = datetime.now().isoformat()
message_data = {
"id": message_id,
"session_id": session_id,
"role": role,
"content": content,
"context_used": json.dumps(context_used) if context_used else None,
"created_at": now
}
if self.client:
try:
self.client.table("chat_messages").insert(message_data).execute()
return message_id
except Exception as e:
print(f"Supabase add message error: {e}")
# In-memory fallback
if session_id not in self._memory_messages:
self._memory_messages[session_id] = []
self._memory_messages[session_id].append(message_data)
return message_id
def get_messages(self, session_id: str, limit: int = 100) -> List[Dict]:
"""Get messages for a session, ordered by creation time."""
if self.client:
try:
result = self.client.table("chat_messages")\
.select("*")\
.eq("session_id", session_id)\
.order("created_at")\
.limit(limit)\
.execute()
return result.data if result.data else []
except Exception as e:
print(f"Supabase get messages error: {e}")
# In-memory fallback
messages = self._memory_messages.get(session_id, [])
return sorted(messages, key=lambda m: m.get("created_at", ""))[:limit]
def delete_message(self, message_id: str):
"""Delete a specific message."""
if self.client:
try:
self.client.table("chat_messages").delete().eq("id", message_id).execute()
except Exception as e:
print(f"Supabase delete message error: {e}")
else:
for session_id, messages in self._memory_messages.items():
self._memory_messages[session_id] = [
m for m in messages if m.get("id") != message_id
]
# =========================================================================
# FIELD DATA OPERATIONS
# =========================================================================
def get_user_fields(self, user_id: str) -> List[Dict]:
"""Get all farmland fields for a user."""
if not self.client:
return []
try:
result = self.client.table("coordinates_quad")\
.select("id, name, crop_type, area_acres, lat1, lon1, lat2, lon2, lat3, lon3, lat4, lon4")\
.eq("user_id", user_id)\
.execute()
return result.data if result.data else []
except Exception as e:
print(f"Supabase get fields error: {e}")
return []
def get_field_by_id(self, field_id: str) -> Optional[Dict]:
"""Get a specific field by ID."""
if not self.client:
return None
try:
result = self.client.table("coordinates_quad")\
.select("*")\
.eq("id", field_id)\
.single()\
.execute()
return result.data
except Exception as e:
print(f"Supabase get field error: {e}")
return None
def get_field_context(self, user_id: str, field_name: Optional[str] = None) -> Dict[str, Any]:
"""
Get field context data formatted for chatbot.
Returns:
{
"field_name": str,
"crop_type": str,
"area_acres": float,
"coordinates": {
"center_lat": float,
"center_lon": float,
"bbox": [lon_min, lat_min, lon_max, lat_max]
},
"all_fields": List[{name, crop_type, area}]
}
"""
fields = self.get_user_fields(user_id)
if not fields:
return {
"field_name": "No fields registered",
"crop_type": "Unknown",
"area_acres": 0,
"coordinates": None,
"all_fields": []
}
# Find specific field or use first one
selected_field = None
if field_name:
for f in fields:
if f.get("name", "").lower() == field_name.lower():
selected_field = f
break
if not selected_field:
selected_field = fields[0]
# Calculate center and bounding box
lats = []
lons = []
for i in range(1, 5):
lat = selected_field.get(f"lat{i}")
lon = selected_field.get(f"lon{i}")
if lat is not None and lon is not None:
lats.append(float(lat))
lons.append(float(lon))
coordinates = None
if lats and lons:
center_lat = sum(lats) / len(lats)
center_lon = sum(lons) / len(lons)
coordinates = {
"center_lat": round(center_lat, 6),
"center_lon": round(center_lon, 6),
"bbox": [min(lons), min(lats), max(lons), max(lats)]
}
return {
"field_name": selected_field.get("name", "Unnamed Field"),
"crop_type": selected_field.get("crop_type", "Unknown"),
"area_acres": selected_field.get("area_acres", 0),
"coordinates": coordinates,
"all_fields": [
{
"name": f.get("name"),
"crop_type": f.get("crop_type"),
"area_acres": f.get("area_acres")
}
for f in fields
]
}
def get_user_profile(self, user_id: str) -> Optional[Dict]:
"""Get user profile and questionnaire data."""
if not self.client:
return None
try:
# user_profiles columns: user_id, full_name, email, phone_number,
# date_of_birth, address, avatar_url, questionnaire_data, updated_at
result = self.client.table("user_profiles")\
.select("questionnaire_data, full_name, address")\
.eq("user_id", user_id)\
.execute()
# Return first result if any, otherwise None
if result.data and len(result.data) > 0:
return result.data[0]
return None
except Exception as e:
print(f"Supabase get profile error: {e}")
return None
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