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from fastapi import (
APIRouter,
status,
Depends,
BackgroundTasks,
HTTPException,
File,
UploadFile,
Form,
)
from fastapi.responses import JSONResponse
from src.utils.logger import logger
from src.agents.role_play.func import create_agents
from pydantic import BaseModel, Field
from typing import List, Dict, Any, Optional
from src.agents.role_play.scenarios import get_scenarios, get_scenario_by_id
import json
import os
import uuid
from datetime import datetime
import base64
router = APIRouter(prefix="/ai", tags=["AI"])
class RoleplayRequest(BaseModel):
query: str = Field(..., description="User's query for the AI agent")
session_id: str = Field(
..., description="Session ID for tracking user interactions"
)
scenario: Dict[str, Any] = Field(..., description="The scenario for the roleplay")
class SessionRequest(BaseModel):
session_id: str = Field(..., description="Session ID to perform operations on")
class CreateSessionRequest(BaseModel):
name: str = Field(..., description="Name for the new session")
class UpdateSessionRequest(BaseModel):
session_id: str = Field(..., description="Session ID to update")
name: str = Field(..., description="New name for the session")
# Session management helper functions
SESSIONS_FILE = "sessions.json"
def load_sessions() -> List[Dict[str, Any]]:
"""Load sessions from JSON file"""
try:
if os.path.exists(SESSIONS_FILE):
with open(SESSIONS_FILE, "r", encoding="utf-8") as f:
return json.load(f)
return []
except Exception as e:
logger.error(f"Error loading sessions: {str(e)}")
return []
def save_sessions(sessions: List[Dict[str, Any]]):
"""Save sessions to JSON file"""
try:
with open(SESSIONS_FILE, "w", encoding="utf-8") as f:
json.dump(sessions, f, ensure_ascii=False, indent=2, default=str)
except Exception as e:
logger.error(f"Error saving sessions: {str(e)}")
def create_session(name: str) -> Dict[str, Any]:
"""Create a new session"""
session_id = str(uuid.uuid4())
session = {
"id": session_id,
"name": name,
"created_at": datetime.now().isoformat(),
"last_message": None,
"message_count": 0,
}
sessions = load_sessions()
sessions.append(session)
save_sessions(sessions)
return session
def get_session_by_id(session_id: str) -> Optional[Dict[str, Any]]:
"""Get session by ID"""
sessions = load_sessions()
return next((s for s in sessions if s["id"] == session_id), None)
def update_session_last_message(session_id: str, message: str):
"""Update session's last message"""
sessions = load_sessions()
for session in sessions:
if session["id"] == session_id:
session["last_message"] = message
session["message_count"] = session.get("message_count", 0) + 1
break
save_sessions(sessions)
def delete_session_by_id(session_id: str) -> bool:
"""Delete session by ID"""
sessions = load_sessions()
original_count = len(sessions)
sessions = [s for s in sessions if s["id"] != session_id]
if len(sessions) < original_count:
save_sessions(sessions)
return True
return False
@router.get("/scenarios", status_code=status.HTTP_200_OK)
async def list_scenarios():
"""Get all available scenarios"""
return JSONResponse(content=get_scenarios())
@router.post("/roleplay", status_code=status.HTTP_200_OK)
async def roleplay(
session_id: str = Form(
..., description="Session ID for tracking user interactions"
),
scenario: str = Form(
..., description="The scenario for the roleplay as JSON string"
),
text_message: Optional[str] = Form(None, description="Text message from user"),
audio_file: Optional[UploadFile] = File(None, description="Audio file from user"),
):
"""Send a message (text or audio) to the roleplay agent"""
# Validate that at least one input is provided
if not text_message and not audio_file:
raise HTTPException(
status_code=400, detail="Either text_message or audio_file must be provided"
)
# Parse scenario from JSON string
try:
scenario_dict = json.loads(scenario)
except json.JSONDecodeError:
raise HTTPException(status_code=400, detail="Invalid scenario JSON format")
if not scenario_dict:
raise HTTPException(status_code=400, detail="Scenario not provided")
# Prepare message content
message_content = []
# Handle text input
if text_message:
message_content.append({"type": "text", "text": text_message})
# Handle audio input
if audio_file:
try:
# Read audio file content
audio_data = await audio_file.read()
# Convert to base64
audio_base64 = base64.b64encode(audio_data).decode("utf-8")
# Determine mime type based on file extension
file_extension = (
audio_file.filename.split(".")[-1].lower()
if audio_file.filename
else "wav"
)
mime_type_map = {
"wav": "audio/wav",
"mp3": "audio/mpeg",
"ogg": "audio/ogg",
"webm": "audio/webm",
"m4a": "audio/mp4",
}
mime_type = mime_type_map.get(file_extension, "audio/wav")
message_content.append(
{
"type": "audio",
"source_type": "base64",
"data": audio_base64,
"mime_type": mime_type,
}
)
except Exception as e:
logger.error(f"Error processing audio file: {str(e)}")
raise HTTPException(
status_code=400, detail=f"Error processing audio file: {str(e)}"
)
# Create message in the required format
message = {"role": "user", "content": message_content}
try:
response = await create_agents(scenario_dict).ainvoke(
{
"messages": [message],
},
{"configurable": {"thread_id": session_id}},
)
# Update session with last message (use text if available, otherwise indicate audio)
last_message = text_message if text_message else "[Audio message]"
update_session_last_message(session_id, last_message)
# Extract AI response content
ai_response = response["messages"][-1].content
logger.info(f"AI response: {ai_response}")
return JSONResponse(content={"response": ai_response})
except Exception as e:
logger.error(f"Error in roleplay: {str(e)}")
raise HTTPException(status_code=500, detail=f"Internal server error: {str(e)}")
@router.post("/get-messages", status_code=status.HTTP_200_OK)
async def get_messages(request: SessionRequest):
"""Get all messages from a conversation session"""
try:
# Create agent instance
agent = create_agents()
# Get current state
current_state = agent.get_state(
{"configurable": {"thread_id": request.session_id}}
)
if not current_state or not current_state.values:
return JSONResponse(
content={
"session_id": request.session_id,
"messages": [],
"total_messages": 0,
}
)
# Extract messages from state
messages = []
if "messages" in current_state.values:
raw_messages = current_state.values["messages"]
for msg in raw_messages:
# Convert message object to dict format
if hasattr(msg, "content") and hasattr(msg, "type"):
messages.append(
{
"role": getattr(msg, "type", "unknown"),
"content": getattr(msg, "content", ""),
"timestamp": getattr(msg, "timestamp", None),
}
)
elif hasattr(msg, "content"):
# Handle different message formats
role = (
"human"
if hasattr(msg, "__class__")
and "Human" in msg.__class__.__name__
else "ai"
)
messages.append(
{
"role": role,
"content": msg.content,
"timestamp": getattr(msg, "timestamp", None),
}
)
else:
# Fallback for unexpected message format
messages.append(
{"role": "unknown", "content": str(msg), "timestamp": None}
)
return JSONResponse(
content={
"session_id": request.session_id,
"messages": messages,
"total_messages": len(messages),
}
)
except Exception as e:
logger.error(
f"Error getting messages for session {request.session_id}: {str(e)}"
)
raise HTTPException(status_code=500, detail=f"Failed to get messages: {str(e)}")
@router.get("/sessions", status_code=status.HTTP_200_OK)
async def get_sessions():
"""Get all sessions"""
try:
sessions = load_sessions()
return JSONResponse(content={"sessions": sessions})
except Exception as e:
logger.error(f"Error getting sessions: {str(e)}")
raise HTTPException(status_code=500, detail=f"Failed to get sessions: {str(e)}")
@router.post("/sessions", status_code=status.HTTP_201_CREATED)
async def create_new_session(request: CreateSessionRequest):
"""Create a new session"""
try:
session = create_session(request.name)
return JSONResponse(content={"session": session})
except Exception as e:
logger.error(f"Error creating session: {str(e)}")
raise HTTPException(
status_code=500, detail=f"Failed to create session: {str(e)}"
)
@router.get("/sessions/{session_id}", status_code=status.HTTP_200_OK)
async def get_session(session_id: str):
"""Get a specific session by ID"""
try:
session = get_session_by_id(session_id)
if not session:
raise HTTPException(status_code=404, detail="Session not found")
return JSONResponse(content={"session": session})
except HTTPException:
raise
except Exception as e:
logger.error(f"Error getting session {session_id}: {str(e)}")
raise HTTPException(status_code=500, detail=f"Failed to get session: {str(e)}")
@router.put("/sessions/{session_id}", status_code=status.HTTP_200_OK)
async def update_session(session_id: str, request: UpdateSessionRequest):
"""Update a session"""
try:
sessions = load_sessions()
session_found = False
for session in sessions:
if session["id"] == session_id:
session["name"] = request.name
session_found = True
break
if not session_found:
raise HTTPException(status_code=404, detail="Session not found")
save_sessions(sessions)
updated_session = get_session_by_id(session_id)
return JSONResponse(content={"session": updated_session})
except HTTPException:
raise
except Exception as e:
logger.error(f"Error updating session {session_id}: {str(e)}")
raise HTTPException(
status_code=500, detail=f"Failed to update session: {str(e)}"
)
@router.delete("/sessions/{session_id}", status_code=status.HTTP_200_OK)
async def delete_session(session_id: str):
"""Delete a session"""
try:
success = delete_session_by_id(session_id)
if not success:
raise HTTPException(status_code=404, detail="Session not found")
return JSONResponse(content={"message": "Session deleted successfully"})
except HTTPException:
raise
except Exception as e:
logger.error(f"Error deleting session {session_id}: {str(e)}")
raise HTTPException(
status_code=500, detail=f"Failed to delete session: {str(e)}"
)
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