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"""
Tools Service for LLM Function Calling
HuggingFace-compatible với prompt engineering
"""
import httpx
from typing import List, Dict, Any, Optional
import json
import asyncio
QUAN TRỌNG:
- event_code PHẢI LÀ metadata.id_use từ context (dạng MongoDB ObjectId)
- KHÔNG dùng tên sự kiện như "Y-CONCERT" làm event_code
- CHỈ trả JSON khi BẮT BUỘC cần gọi tool
- Nếu có thể trả lời từ context sẵn có, đừng gọi tool
- Sau khi nhận kết quả từ tool, hãy trả lời user bằng ngôn ngữ tự nhiên
"""
async def parse_and_execute(self, llm_response: str) -> Optional[Dict[str, Any]]:
"""
Parse LLM response và execute tool nếu có
Returns:
None nếu không có tool call
Dict với tool result nếu có tool call
"""
# Try to extract JSON from response
try:
# Tìm JSON block trong response
if "```json" in llm_response:
json_start = llm_response.find("```json") + 7
json_end = llm_response.find("```", json_start)
json_str = llm_response[json_start:json_end].strip()
elif "{" in llm_response and "}" in llm_response:
# Fallback: tìm JSON object đầu tiên
json_start = llm_response.find("{")
json_end = llm_response.rfind("}") + 1
json_str = llm_response[json_start:json_end]
else:
return None
tool_call = json.loads(json_str)
# Handle multiple JSON formats from LLM
# Format 1: HF API nested wrapper
# {"name": "tool_call", "arguments": {"tool_call": true, ...}}
if "name" in tool_call and "arguments" in tool_call and isinstance(tool_call["arguments"], dict):
if "tool_call" in tool_call["arguments"]:
tool_call = tool_call["arguments"] # Unwrap
# Format 2: Direct tool name format
# {"name": "tool.get_event_details", "arguments": {"event_code": "..."}}
if "name" in tool_call and "arguments" in tool_call:
function_name = tool_call["name"]
# Remove "tool." prefix if exists
if function_name.startswith("tool."):
function_name = function_name.replace("tool.", "")
# Convert to standard format
tool_call = {
"tool_call": True,
"function_name": function_name,
"arguments": tool_call["arguments"],
"reason": "Converted from alternate format"
}
# Validate tool call structure
if not tool_call.get("tool_call"):
return None
function_name = tool_call.get("function_name")
arguments = tool_call.get("arguments", {})
# Execute tool
if function_name == "get_event_details":
result = await self._get_event_details(arguments.get("event_code"))
return {
"function": function_name,
"arguments": arguments,
"result": result
}
else:
return {
"function": function_name,
"arguments": arguments,
"result": {"success": False, "error": f"Unknown function: {function_name}"}
}
except (json.JSONDecodeError, KeyError, ValueError) as e:
# Không phải tool call, response bình thường
return None
async def _get_event_details(self, event_code: str) -> Dict[str, Any]:
"""
Call getEventByEventCode API
"""
print(f"\n=== CALLING API get_event_details ===")
print(f"Event Code: {event_code}")
try:
url = f"https://hoalacrent.io.vn/api/v0/event/get-event-by-event-code"
params = {"eventCode": event_code}
print(f"URL: {url}")
print(f"Params: {params}")
response = await self.client.get(url, params=params)
print(f"Status Code: {response.status_code}")
# Log raw response for debugging
raw_text = response.text
print(f"Raw Response Length: {len(raw_text)} chars")
print(f"Raw Response Preview (first 200 chars): {raw_text[:200]}")
response.raise_for_status()
# Try to parse JSON
try:
data = response.json()
except json.JSONDecodeError as e:
print(f"JSON Decode Error: {e}")
print(f"Full Raw Response: {raw_text}")
return {
"success": False,
"error": f"Invalid JSON response from API",
"message": "API trả về dữ liệu không hợp lệ (không phải JSON)",
"raw_response_preview": raw_text[:500]
}
print(f"Response Data Keys: {list(data.keys()) if data else 'None'}")
print(f"Has 'data' field: {'data' in data}")
# Extract relevant fields
event = data.get("data", {})
if not event:
return {
"success": False,
"error": "Event not found",
"message": f"Không tìm thấy sự kiện với mã {event_code}"
}
# Extract location với nested address structure
location_data = event.get("location", {})
location = {
"address": {
"street": location_data.get("address", {}).get("street", ""),
"city": location_data.get("address", {}).get("city", ""),
"state": location_data.get("address", {}).get("state", ""),
"postalCode": location_data.get("address", {}).get("postalCode", ""),
"country": location_data.get("address", {}).get("country", "")
},
"coordinates": {
"latitude": location_data.get("coordinates", {}).get("latitude"),
"longitude": location_data.get("coordinates", {}).get("longitude")
}
}
# Build event URL
event_code = event.get("eventCode")
event_url = f"https://www.festavenue.site/user/event/{event_code}" if event_code else None
return {
"success": True,
"event_code": event_code,
"event_name": event.get("eventName"),
"event_url": event_url, # NEW: Direct link to event page
"description": event.get("description"),
"short_description": event.get("shortDescription"),
"start_time": event.get("startTimeEventTime"),
"end_time": event.get("endTimeEventTime"),
"start_sale": event.get("startTicketSaleTime"),
"end_sale": event.get("endTicketSaleTime"),
"location": location, # Full nested structure
"contact": {
"email": event.get("publicContactEmail"),
"phone": event.get("publicContactPhone"),
"website": event.get("website")
},
"capacity": event.get("capacity"),
"hashtags": event.get("hashtags", [])
}
print(f"Successfully extracted event data for: {event.get('eventName')}")
print(f"=== API CALL COMPLETE ===")
return result
except httpx.HTTPStatusError as e:
return {
"success": False,
"error": f"HTTP {e.response.status_code}",
"message": f"API trả về lỗi khi truy vấn sự kiện {event_code}"
}
except Exception as e:
return {
"success": False,
"error": str(e),
"message": "Không thể kết nối đến API để lấy thông tin sự kiện"
}
async def close(self):
"""Close HTTP client"""
await self.client.aclose()
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